Hach FT660 sc Basic User Manual

DOC023.97.80221

FT660 sc

07/2016, Edition 4

Basic User Manual

Manuel d'utilisation de base

Manual básico del usuario

English...................................................................................................................................................................................................3

Français.............................................................................................................................................................................................. 23

Español............................................................................................................................................................................................... 44

2

Specifications

Specifications are subject to change without notice.

Specification Details

Range 0.000–5000 milli-Nephelometric Turbidity Units

(mNTU)

(0–5.0 NTU with +10% over-range limit)

Measurement units mNTU, mFTU, NTU, FTU, mg/L, Degree

Over-range limit

1

+10%

Method compliance USEPA Approved for drinking water applications by

Method 10133

Lowest expected reading 7 mNTU

Accuracy ±3% of reading or ±5 mNTU (whichever is greater)

Repeatability ±0.42% at 50 mNTU

±0.3% at 800 mNTU

Resolution 0.001 mNTU on lowest range

0.1 mNTU on highest range

Calibration Single point at 800 mNTU ±50 mNTU

Calibration frequency Every 3 months (or as per regulations)

Calibration (wet)

verification method

Pass/fail criteria or tolerance (standards less than

1000 mNTU): 25–50 mNTU

Pass/fail criteria or tolerance (standards greater than

1000 mNTU): 5%

Specification Details

Calibration (dry)

verification method

Verification level: 20–50 mNTU

Performance default: ±5 mNTU of the identified

baseline value

Method precision: less than or equal to 5% relative

standard deviation (RSD)

Signal averaging No averaging, 6, 30, 60 or 90 seconds

Sample light source Class 1 Laser Product with embedded 7.5 mW,

670 nm, Class 3B Laser Source

Complies with 21 CFR 1040.10 except for deviations

pursuant to Laser Notice No. 50, dated June 24,

2007. FDA Laser Accession No. 9911570

Power requirement 10.5 to 13.2 VDC at 1.5 VA

Operating conditions 0 to 40 °C (32 to 100 °F), 5–95% non-condensing

Storage conditions –20 to 60 °C (–4 to 140 °F)

Sample requirements Temperature: 0 to 50 °C (32 to 121 °F)

Flow: 100–750 mL/minute (1.6–11.9 gal/hour)

Recorder output 0–20 mA or 4–20 mA

The output span is programmable over any portion of

the 0.000–1000 mNTU range.

Sample inlet fitting ¼-in. NPT female, ¼-in. compression fitting

Drain fitting ½-in. NPT female, ½-in. hose barb

Tubing requirements Sample inlet: ¼-inch OD rigid or semi-rigid tubing

Drain: ½-inch ID flexible plastic tubing

Dimensions

(W x D x H)

25.4 x 30.5 x 40.6 cm (10 x 12 x 16 in.)

1

The instrument range is from 0 to 5000 mNTU. The instrument is guaranteed to meet specifications relative to accuracy, repeatability and linearity

up to 5000 mNTU. The instrument will still show a value above 5000 mNTU to the level of 5500 mNTU, but above 5000 mNTU, measurement

performance is not guaranteed. Between 5000 and 5500 mNTU, the warning alarm will flash to tell the operator that the operating range has been

exceeded. An over-range event is also logged. All alarm setpoints are calculated based on the maximum value show (5500 mNTU).

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Specification Details

Mounting options Wall mounted or floor stand

Shipping weight Turbidimeter and controller—16.31 kg (13.5 lb)

Turbidimeter only—4.71 kg (10 lb)

ASTM conformance D6698 Standard test method for online measurement

of turbidity below 5 NTU

Limit of detection (LOD) 0.296 mNTU (ISO 15839)

Protection class III

Pollution degree 2/II

General information

In no event will the manufacturer be liable for direct, indirect, special,

incidental or consequential damages resulting from any defect or

omission in this manual. The manufacturer reserves the right to make

changes in this manual and the products it describes at any time, without

notice or obligation. Revised editions are found on the manufacturer’s

website.

Safety information

Please read this entire manual before unpacking, setting up or operating

this equipment. Pay attention to all danger and caution statements.

Failure to do so could result in serious injury to the operator or damage

to the equipment.

Make sure that the protection provided by this equipment is not impaired.

Do not use or install this equipment in any manner other than that

specified in this manual.

Use of hazard information

D A N G E R

Indicates a potentially or imminently hazardous situation which, if not avoided, will

result in death or serious injury.

W A R N I N G

Indicates a potentially or imminently hazardous situation which, if not avoided,

could result in death or serious injury.

C A U T I O N

Indicates a potentially hazardous situation that may result in minor or moderate

injury.

N O T I C E

Indicates a situation which, if not avoided, may cause damage to the instrument.

Information that requires special emphasis.

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or

damage to the instrument could occur if not observed. A symbol, if noted

on the instrument, will be included with a danger or caution statement in

the manual.

This symbol, if noted on the instrument, references the instruction

manual for operation and/or safety information.

Electrical equipment marked with this symbol may not be disposed of

in European public disposal systems after 12 August of 2005. In

conformity with European local and national regulations (EU Directive

2002/98/EC), European electrical equipment users must now return

old or end-of-life equipment to the Producer for disposal at no charge

to the user.

Note: For return for recycling, please contact the equipment producer or supplier

for instructions on how to return end-of-life equipment, producer-supplied

electrical accessories, and all auxillary items for proper disposal.

This symbol indicates that a risk of electrical shock and/or

electrocution exists.

This symbol indicates the need for protective eye wear.

4 English

This symbol indicates a laser device is used in the equipment.

This symbol, when noted on the product, identifies the location of a

fuse or current limiting device.

This symbol indicates that the marked item requires a protective earth

connection. If not provided with a plug on a cord, connect positive

earth to this terminal (U.S. cord set provides ground).

Certification

Canadian Radio Interference-Causing Equipment Regulation,

IECS-003, Class A:

Supporting test records reside with the manufacturer.

This Class A digital apparatus meets all requirements of the Canadian

Interference-Causing Equipment Regulations.

Cet appareil numèrique de la classe A respecte toutes les exigences du

Rëglement sur le matériel brouilleur du Canada.

FCC Part 15, Class "A" Limits

Supporting test records reside with the manufacturer. The device

complies with Part 15 of the FCC Rules. Operation is subject to the

following conditions:

1. The equipment may not cause harmful interference.

2. The equipment must accept any interference received, including

interference that may cause undesired operation.

Changes or modifications to this equipment not expressly approved by

the party responsible for compliance could void the user's authority to

operate the equipment. This equipment has been tested and found to

comply with the limits for a Class A digital device, pursuant to Part 15 of

the FCC rules. These limits are designed to provide reasonable

protection against harmful interference when the equipment is operated

in a commercial environment. This equipment generates, uses and can

radiate radio frequency energy and, if not installed and used in

accordance with the instruction manual, may cause harmful interference

to radio communications. Operation of this equipment in a residential

area is likely to cause harmful interference, in which case the user will be

required to correct the interference at their expense. The following

techniques can be used to reduce interference problems:

1. Disconnect the equipment from its power source to verify that it is or

is not the source of the interference.

2. If the equipment is connected to the same outlet as the device

experiencing interference, connect the equipment to a different

outlet.

3. Move the equipment away from the device receiving the interference.

4. Reposition the receiving antenna for the device receiving the

interference.

5. Try combinations of the above.

Product overview

D A N G E R

Chemical or biological hazards. If this instrument is used to monitor a

treatment process and/or chemical feed system for which there are

regulatory limits and monitoring requirements related to public health,

public safety, food or beverage manufacture or processing, it is the

responsibility of the user of this instrument to know and abide by any

applicable regulation and to have sufficient and appropriate

mechanisms in place for compliance with applicable regulations in the

event of malfunction of the instrument.

D A N G E R

Although the sc controller is certified for Class 1, Division 2 Hazardous Locations,

it is only certified when installed with sensors listed in Control Drawings 5860078.

The sc controller and FT660 sc are NOT suitable for use in Class 1, Division

2 Hazardous Locations.

The FT660 sc is a continuous-reading instrument for filter management

(Figure 1). The FT660 sc is appropriate for ultra pure and all processes

that include clean water monitoring.

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5

The status light on the head assembly is illuminated when an error

occurs and flashes when a warning occurs or the head assembly is not

installed correctly.

The back of the head assembly has a molded "lip" that may be used to

hang the head on the edge of the body of the instrument during

maintenance.

Figure 1 Instrument overview

1 Status light 5 Drain fitting

2 Power light 6 Drain plug

3 Mounting bracket 7 Body of the instrument

4 Sample inlet fitting 8 Head assembly

Product components

Make sure that all components have been received (Figure 2). If any

items are missing or damaged, contact the manufacturer or a sales

representative immediately.

Figure 2 Instrument components

1 FT660 sc turbidimeter 2 800 mNTU StablCal

®

Certified

Standard

6 English

Installation

D A N G E R

Multiple hazards. Only qualified personnel must conduct the tasks

described in this section of the document.

Installation guidelines

N O T I C E

High internal temperatures will damage the instrument components.

• Do not operate the instrument in direct sunlight or next to a heat

source.

• Install the instrument indoors in a clean environment with minimum

vibration.

Note: Particulate contamination from the surrounding area is a major cause of

error.

• Install the instrument level.

• Keep the flow rate and operating temperature as constant as possible

for best performance.

Mechanical installation

Instrument mounting

Install this instrument on a flat, vertical surface. Refer to the illustrated

steps in Figure 3. Mounting hardware (two ¼-20 bolts) is supplied by the

customer.

Install the instrument as near to the sampling point as possible to

minimize lag time of the sample flow.

Refer to Figure 4 for instrument dimensions and clearance

specifications.

Note: As an alternative, this instrument can be installed on the optional floor stand.

Figure 3 Instrument mounting

English 7

Figure 4 Instrument dimensions

1 22 cm (10 in.) minimum clearance

Electrical installation

Connect an sc controller using Quick-connect fitting

The instrument can be connected to an sc controller using the keyed

quick-connect fitting (Figure 5). Extension cables are available. Retain

the connector cap to seal the connector opening in case the instrument

must be removed. Refer to the sc controller manual for more information.

Figure 5 Quick-connect fitting

Plumbing

Sample line considerations

Select a good, representative sampling point for optimum instrument

performance. The sample analyzed must be representative of the

conditon of the entire system.

To minimize erratic readings:

• Draw samples from locations that are sufficiently distant from points of

chemical additions to the process stream

• Make sure samples are sufficiently mixed

• Make sure all chemical reactions are complete

Connect the sample stream

Connect sample inlet and drain lines to the fittings on the body of the

instrument (Figure 1 on page 6). Sample inlet and drain tubing are

supplied by the customer. Refer to Specifications on page 3 for tubing

requirements.

Install the sample line(s) into a larger process pipe to minimize

interference from air bubbles or pipeline bottom sediment. A sample line

going into the center of a process pipe is best.

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English

Figure 6 shows examples of good and bad methods of installing a

sample line into a process pipe.

Notes:

• Keep the sample inlet and drain tubing as short as possible to

minimize lag time of the sample flow.

• Control the flow rate into the instrument with a flow restriction device

on the sample line. Refer to Specifications on page 3 for flow rate

specifications.

Note: Flow rates greater than 750 mL/minute will cause the instrument to

overflow into the drain, decrease the performance of the bubble trap and cause

incorrect readings.

Figure 6 Sampling methods

1 Air 2 Sample flow

Operation

Using the sc controller

Before using the instrument with an sc controller become familiar with

the operating mode of the sc controller. Refer to the sc controller user

manual and learn how to use and navigate the menu functions.

Configure the instrument

Use the Configure menu to enter identification information and display

options for the instrument and to change options for instrument settings,

data handling and storage.

1. From the Main menu, select Sensor Setup, [Select Sensor],

Configure.

2. Use the arrow keys to select an option and confirm. To enter

numbers, characters or punctuation, push and hold the UP or DOWN

arrow keys. Push the RIGHT arrow key to advance to the next

space.

Option Description

BUBBLE

REJECT

Enable or disable bubble reject—Yes (default) or No

Bubble reject is an averaging algorithm that

compensates for higher readings caused by entrained

air coming out of the solution in the sample chamber.

SIGNAL AVG Select no signal averaging or the amount of time for

signal averaging—no averaging, 6, 30, 60 or 90 (default)

seconds.

MEAS UNITS Select the measurement units to show on the display—

mNTU (default), mFTU, NTU, FTU, mg/L or Degree.

EDIT NAME Change the name to show on the display for the

instrument. The instrument name can be a maximum of

12-digits in any combination of symbols and alpha or

numeric characters.

Note: The serial number of the instrument is the default

name.

SET

RESOLUTION

Set the number of significant digits to show on the

display (default=3).

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Option Description

DATALOG

INTRVL

Select the interval between saving data points to the

data log—30 seconds or 1, 5, 10 or 15 (default) minutes.

OFFSET Sets an offset of the value of the standard used for

calibration (-50 to +50 mNTU, default=0).

The offset value is subtracted from the calibration

standard value shown on the sc controller.

The offset can be entered after a calibration is complete

and is based on independent turbidity measurement of

the calibration standard.

Note: The offset will not result in a calibration standard

value of less than zero on the sc controller.

Data logging

The sc controller provides one data log and one event log for each

instrument. The data log stores the measurement data at selected

intervals. The event log stores different types of events that occur on the

devices (i.e., configuration changes, alarms and warning conditions).

The data log and the event log can be saved in CSV format. Refer to the

sc controller user manual for instructions.

Calibration

Calibration is done in the body of the instrument or using the optional

calibration kit.

Calibration is done using 1 L of 800 ± 50 mNTU StablCal Stabilized

Formazin Certified Standard. Do not use other types or values of

standards. Do not use user-prepared formazin.

The performance specifications given in this manual are based on and

guaranteed only when calibration is done with StablCal Stabilized

Formazin Certified Standard for this instrument. The manufacturer

cannot guarantee the performance of the instrument if calibrated with co-

polymer styrenedivinylbenzene beads or other suspensions.

Prepare the StablCal

®

Standard

• Before opening a StablCal Standard bottle, clean the exterior surface

of the bottle with clean water to remove dust or other debris.

• Gently invert the bottle for 1 minute (about 50 inversions). Do not

shake.

Note: The suspension is stable for 30–60 minutes after mixing.

The StablCal Certified Standard is stabilized formazin with a value that is

identified to within ± 1 mNTU. The value, specific to that particular lot of

product, is printed on the label. Lot-to-lot variation will be ± 50 mNTU

from the standard value, with a standard deviation of less than ± 5%

within a single lot.

Calibration notes

• Calibrate the instrument before initial use.

• Calibrate the instrument every three months (or as set by regulatory

agencies).

• Calibrate the instrument after any significant maintenance or repair is

done on the instrument.

• Always clean the instrument immediately before calibration. Refer to

Clean the instrument on page 17.

• Operate the instrument at least 10 hours before calibration.

• For the best calibration, calibrate the instrument when it is at the same

temperature as the operating conditions.

• The Hold Outputs feature is automatically enabled during the zero

electronics and calibration procedure. The Hold Output feature holds

attached outputs at the before-calibration settings.

Calibration procedure

1. From the Main menu, select Sensor Setup, [Select Sensor],

Calibrate, StablCal Cal.

2. Select the available Output Mode (Active, Hold or Transfer) from the

list box and confirm.

3. Remove the head assembly and bubble trap cover from the body of

the instrument. Refer to Figure 7.

4. Make sure that the body of the instrument is drained completely.

5. Enter the turbidity value that is on the label of the StablCal Standard

bottle and confirm.

6. Put a funnel at the end of the bubble trap and slowly put 800 mNTU

StablCal Standard in the funnel to fill the body. Refer to Figure 7.

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English

7. Put the bubble trap cover and head assembly on the body of the

instrument.

Note: If the head assembly is not correctly installed, the laser will not turn on

and the reading on the display will be near 0.000 mNTU or a negative value.

The red status light on the instrument will also flash one time per second.

8. When the turbidity reading is stable (and after greater than

5 minutes), confirm to accept the reading.

9. When the display shows "GOOD CAL! GAIN: X.XX ENTER TO

CONT.", confirm to save the turbidity value.

Note: If the display shows "BAD CAL!", confirm to do the calibration again or

exit.

10. When the display shows "VERIFY CAL?", confirm to do a calibration

verification or exit without verification.

11. Do a calibration verification or enter the operator initials to complete

the calibration.

12. When the display shows "RETURN SENSOR TO MEASURE

MODE", confirm.

Figure 7 Calibrate the instrument

1 Head assembly 4 Funnel

2 800 mNTU StablCal

®

Certified

Standard

5 Body of the instrument

3 Bubble trap 6 Bubble trap cover

Calibration verification

Do a calibration verification immediately after every calibration.

Subsequent verifications are referenced to the initial verification.

Do a calibration verification monthly between calibrations.

A calibration verification is a check that is done to make sure that the

instrument is working correctly and calibrated.

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11

Types of verifications

Wet or dry standards can be used to do calibration verifications.

To do a wet standard verification, refer to Verification procedure with a

wet standard on page 12.

To do a dry standard verification, refer to Prerequisites for dry standard

use on page 12 and then either:

• Verification with a dry standard and software on page 13—Applies

to instruments with dry standard software.

• Verification with a dry standard without software on page 15—

Applies to instruments that do not have dry standard software.

Verification procedure with a wet standard

Wet standard verification is done using 1 L of StablCal Stabilized

Formazin Certified Standard (0–5500 mNTU) for this instrument . Do not

use other standards. Do not use user-prepared formazin.

Note: For the best verification results, clean the instrument before doing a wet

standard verification. Refer to Clean the instrument on page 17.

Note: On the sc controller, there is no option to set the pass or fail criteria (PFC)

for a wet verification. The default PFC is ± 50 mNTU (0.050 NTU) or 5% of the

reading, whichever is greater.

1. From the Main menu, select Sensor Setup, [Select Sensor],

Calibrate, Verification, Perform Ver.

2. Select the available Output Mode (Active, Hold or Transfer) from the

list box and confirm.

3. Select WET for the verification type and confirm.

4. Enter the turbidity value that is on the label of the StablCal Standard

bottle and confirm.

5. When the display shows "DRAIN AND CLEAN BODY. ENTER TO

CONT.", fully flush the body of the instrument with water that is less

than 50 mNTU (0.05 NTU).

a. Remove the head assembly and bubble trap cover from the body

of the instrument. Refer to Figure 7 on page 11.

b. Put an empty container under the instrument.

c. Remove the drain plug from the bottom of the body of the

instrument. Refer to Figure 1 on page 6.

Note: There is no risk of laser exposure with the drain plug removed. The

laser is disabled when the head assembly is removed.

d. Fully flush the body of the instrument with water that is less than

50 mNTU (0.05 NTU).

e. Install the drain plug in the instrument.

6. Prepare the StablCal standard. Refer to Prepare the StablCal

®

Standard on page 10.

7. Put a funnel at the end of the bubble trap and slowly put the StablCal

Standard in the funnel to fill the body. Confirm. Refer to Figure 7

on page 11.

8. Put the bubble trap cover and head assembly on the body of the

instrument.

9. When the turbidity reading is stable (and after greater than

5 minutes), confirm to accept the reading.

10. If "GOOD VER" (good verification) is shown:

a. Select ENTER INITIALS and confirm.

b. Enter operator initials and confirm.

c. Select RETURN SENSOR TO MEASURE MODE and confirm.

11. If "BAD VER" (bad verification) is shown:

a. To do the calibration verification again, confirm.

Note: If the verification fails two times, “Please Recalibrate” is shown, then

the display returns to the Calibrate Menu. Verification cannot be done until

the instrument is recalibrated.

b. To exit, push BACK.

Note: The bad verification is saved in the verification history.

Prerequisites for dry standard use

In order to use the dry standard, the instrument must have a special

aperture plate. Refer to Figure 8 on page 14. The instrument can also

have a software upgrade to install dry standard software.

Instruments made before April 2008 do not have the special aperture

plate. Customers can order and install the special aperture plate.

Installation instructions are provided with the aperture plate.

Instruments made before April 2008 do not have dry standard software

installed. Software upgrades must be done by the manufacturer.

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English

Starting in April of 2008, the aperture plate and dry standard software

will be installed on instruments at the time of manufacture.

Verification with a dry standard and software

This procedure includes instructions on how to:

• Enable the dry standard software and set the pass or fail criteria for

verification

• Find and save a baseline value for the dry standard using the dry

standard software

• Do a dry standard verification using the dry standard software

Find and save the baseline value for the dry standard immediately after

the instrument is calibrated and after every subsequent calibration. Refer

to Assign a baseline value to the dry standard on page 13.

The baseline value is referenced for subsequent calibration verifications

until the next calibration.

Note: When not in use, keep the dry standard in the protective case.

Enable the dry standard software

1. From the Main menu, select Sensor Setup, [Select Sensor],

Calibrate, Verification, CVM Select, Enable.

2. To set the pass or fail criteria to a value other than the recommended

default (± 5 mNTU):

a. Select Verification, P/F Criteria.

Note: The P/F Criteria menu option is available only if CVM is set to

ENABLE in step 1.

b. Use the arrow keys to change the PFC (pass or fail criteria) value

and confirm.

The PFC range is 5–250 mNTU.

Assign a baseline value to the dry standard

1. After the instrument is calibrated and the operator initials have been

entered, the display shows "VERIFY CAL?". Confirm to start the

verification process.

2. Select DRY for the verification type and confirm.

3. Remove the head assembly from the body of the instrument.

4. Remove the dry standard from the protective case. Refer to Figure 8.

5. Record the serial number of the dry standard. Refer to Figure 8.

6. Clean, dry and inspect the dry standard.

a. Use the disposable wipes provided to clean the dry standard.

b. Use a dry cloth to dry the top

1

/

3

of the dry standard. Refer to

Figure 8.

c. Make sure that the glass of the dry standard is free of chips and

scratches.

7. Install the dry standard.

a. Put the dry standard in the aperture plate. Make sure that the

locking pin goes in the notch in the aperture plate. Refer to

Figure 8.

b. Turn the dry standard

1

/

8

of a turn clockwise until the dry standard

locks in position.

c. Use a dry cloth to remove any fingerprints and oils from the glass

of the dry standard.

8. Put the head assembly on the body of the instrument.

9. Enter the serial number of the dry standard, then confirm.

10. When the instrument reading is stable, confirm to accept the reading

as the baseline value.

11. Remove the dry standard from the instrument.

a. Remove the head assembly from the body of the instrument.

b. Turn the dry standard

1

/

8

of a turn counter-clockwise, then

remove the dry standard from the aperture plate.

c. Put the head assembly on the body of the instrument.

12. Confirm to go to Measurement Mode.

13. Push HOME to show the online measurements.

14. Put the dry standard in the protective case.

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13

Figure 8 Install the dry standard

1 Dry standard 5 Locking pin

2 Protective case 6 Notch in the aperture plate

3 Top of the dry standard 7 Head assembly

4 Serial number 8 Aperture plate

Verification procedure with dry standard and software

1. From the Main menu, select Sensor Setup, [Select Sensor],

Calibrate, Verification, Perform Ver.

2. Select the available Output Mode (Active, Hold or Transfer) from the

list box and confirm.

3. Select DRY for the verification type and confirm.

4. Remove the dry standard from the protective case. Refer to Figure 8

on page 14.

5. Make sure that the serial number on the display is the same as the

serial number on the dry standard, then confirm. Refer to Figure 8

on page 14.

6. Remove the head assembly from the body of the instrument.

7. Clean, dry and inspect the dry standard.

a. Use the disposable wipes provided to clean the dry standard.

b. Use a dry cloth to dry the top

1

/

3

of the dry standard. Refer to

Figure 8 on page 14.

c. Make sure that the glass of the dry standard is free of chips and

scratches.

8. Install the dry standard.

a. Put the dry standard in the aperture plate. Make sure that the

locking pin goes in the notch in the aperture plate. Refer to

Figure 8 on page 14.

b. Turn the dry standard

1

/

8

of a turn clockwise until the dry standard

locks in position.

c. Use a dry cloth to remove any fingerprints and oils from the glass

of the dry standard.

9. Put the head assembly on the body of the instrument.

10. When the instrument reading is stable, confirm.

"GOOD VER" (good verification) or "BAD VER" (bad verification) is

shown. If "BAD VER" is shown, the instrument did not to meet the

PFC (pass or fail criteria), or the instrument was not able to get a

stable reading. Use Table 1 to identify the result and what action

should be done.

11. Remove the dry standard from the instrument.

a. Remove the head assembly from the body of the instrument.

b. Turn the dry standard

1

/

8

of a turn counter-clockwise, then

remove the dry standard from the aperture plate.

c. Put the head assembly on the body of the instrument.

12. Confirm to go to Measurement Mode.

13. Push HOME to show the online measurements.

14. Put the dry standard in the protective case.

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English

Table 1 Interpretation of verification values

Verification values Result identified Suggested action

± 5 mNTU of the

baseline

2

The instrument is

calibrated.

None

- 5 mNTU (or less) of

the baseline

23

The instrument is not

calibrated.

1. Clean the instrument.

2. Do the verification again.

3. Recalibrate the instrument

if necessary.

4. If recalibrated, assign a

new baseline value.

+ 5 mNTU (or

greater) of the

baseline

The instrument body

may be contaminated.

There may be fluid on

the optical surface of the

dry standard.

1. Clean the body of the

instrument, bubble trap,

detector and dry standard.

2. Recalibrate the instrument.

3. Assign a new baseline

value.

Verification with a dry standard without software

This procedure includes instructions on how to:

• Assign an initial baseline value to the dry standard without dry

standard software

• Do a dry standard verification without dry standard software

Find and store the baseline value for the dry standard immediately after

the instrument is calibrated and after every subsequent calibration. Refer

to Assign a baseline value to the dry standard on page 15.

The baseline value is referenced for subsequent calibration verifications

until the next calibration.

Note: This procedure can be done on instruments that use the AquaTrend

®

controller by manually recording the baseline value for the dry standard, pass or fail

criteria (PFC) for verification and verification value.

Note: When not in use, keep the dry standard in the protective case.

Assign a baseline value to the dry standard

1. Remove the head assembly from the body of the instrument.

2. Remove the dry standard from the protective case. Refer to Figure 8

on page 14.

3. Clean, dry and inspect the dry standard.

a. Use the disposable wipes provided to clean the dry standard.

b. Use a dry cloth to dry the top

1

/

3

of the dry standard. Refer to

Figure 8 on page 14.

c. Make sure that the glass of the dry standard is free of chips and

scratches.

4. Install the dry standard.

a. Put the dry standard in the aperture plate. Make sure that the

locking pin goes in the notch in the aperture plate. Refer to

Figure 8 on page 14.

b. Turn the dry standard

1

/

8

of a turn clockwise until the dry standard

locks in position.

c. Use a dry cloth to remove any fingerprints and oils from the glass

of the dry standard.

5. Put the head assembly on the body of the instrument.

6. When the instrument reading is stable, record the value.

This value is one of three values that will be used to calculate an

average value. The average value will be the final baseline value.

7. Prepare the dry standard to be measured again.

a. Remove the head assembly from the body of the instrument.

b. Turn the dry standard

1

/

8

of a turn counter-clockwise, then

remove the dry standard from the aperture plate.

c. Do steps 3–5.

2

If the instrument consistently does not meet the PFC, contact the manufacturer.

3

A significantly low value is 25% or less of the expected value. A significantly low value may occur because the light source or detector is not

working correctly. If the verification value is consistently significantly low, send the instrument to the manufacturer for service.

English 15

8. When the instrument reading is stable, record the value.

9. Do step 7 again.

10. When the instrument reading is stable, record the value.

11. Calculate and record the average of the three recorded values. The

average value is the final baseline value for the dry standard for this

specific instrument.

12. Near the final baseline value, record the serial number of the

instrument and the serial number of the dry standard. Refer to

Figure 8 on page 14.

Note: The final baseline value for the dry standard is applicable only for the

combination of the dry standard and the instrument used to measure the dry

standard.

13. Remove the dry standard from the instrument.

a. Remove the head assembly from the body of the instrument.

b. Turn the dry standard

1

/

8

of a turn counter-clockwise, then

remove the dry standard from the aperture plate.

c. Put the head assembly on the body of the instrument.

14. Put the dry standard in the protective case.

Verification procedure with dry standard without software

1. Do steps 1– 5 of Assign a baseline value to the dry standard

on page 15.

2. When the instrument reading is stable, record the value.

3. Use Table 1 on page 15 to identify the result and what action should

be done.

Note: Table 1 on page 15 assumes a PFC (pass or fail criteria) of ± 5 mNTU.

4. Remove the dry standard from the instrument.

a. Remove the head assembly from the body of the instrument.

b. Turn the dry standard

1

/

8

of a turn counter-clockwise, then

remove the dry standard from the aperture plate.

c. Put the head assembly on the body of the instrument.

5. Put the dry standard in the protective case.

Calibration and verification history

The calibration and verification history logs contain information on the

last 12 calibrations and the last 12 verifications.

To access the calibration history logs, select Sensor Setup, [Select

Sensor], Calibrate, Cal History.

To access the verification history logs, select Sensor Setup, [Select

Sensor], Calibrate, Verification.

Push confirm to move through a history log. After all 12 entries are

shown, the display goes back to the menu. Push BACK to go back to

the menu.

A verification history entry shows the:

• Value of the certification standard used

• Turbidity reading at verification

• Operator initials

• Date and time

A calibration history entry shows the:

• Gain value

• Operator initials

• Date and time

Notes:

• History data is saved as first in, first out. When a history log is full, the

newest entry is saved and the oldest entry in the log is deleted.

• When the instrument is received from the factory, default values or

blank spaces are shown for the history information. Those values are

replaced with real data as the history log is filled.

Maintenance

D A N G E R

Multiple hazards. Only qualified personnel must conduct the tasks

described in this section of the document.

16 English

Maintenance schedule

N O T I C E

The laser module and detector system are not user-servicable items. Contact

Technical Support for replacement.

Clean the instrument at least once a month. The instrument may need to

be cleaned more frequently depending on water quality.

Clean the instrument

W A R N I N G

Do not remove the bottom plate of the instrument or drain plug when

the head assembly is installed and the instrument is in operation. Risk

of exposure to Class 3B Radiation will result.

W A R N I N G

Personal injury hazard. Never remove covers from the instrument. This is a laser-

based instrument and the user risks injury if exposed to the laser.

Sediment of the size that passes through with filter effluent is difficult to

see. Reading accuracy may be affected if the instrument is not cleaned

at regular intervals. Noise (fluctuation) in the reading may indicate the

need to clean the instrument.

Refer to the illustrated steps to clean the instrument.

Make sure to remove debris from internal corners and other internal

areas that are difficult to access.

Do a calibration verification after this procedure is complete if a

calibration will not be done immediately.

Required tools and materials:

• Soft brush

• Test tube brush

• Cleaning solution (25 mL of household bleach in 3.78 L of water or

1 mL laboratory detergent (i.e., Liqui-nox) in 1L of water)

• Water that is less than 50 mNTU (0.05 NTU)

Note: Put the cleaning solution in a container that can hold all of the bubble trap.

English 17

1 2

18 English

3 4

English 19

How to clean spills

C A U T I O N

Chemical exposure hazard. Dispose of chemicals and wastes in

accordance with local, regional and national regulations.

1. Obey all facility safety protocols for spill control.

2. Discard the waste according to applicable regulations.

Troubleshooting

Problem Possible cause Resolution

Low (< 1) or

negative readings

Head assembly is not

correctly installed on the

body of the instrument

Correctly install the head

assembly on the body of

the instrument. If not, the

red status light will flash.

Laser failure Contact Technical Support.

PMT/Electronics failure

Errors

When an error occurs:

• The reading on the measurement screen flashes.

• All outputs are held.

• The red status light on the instrument turns on.

To access the current instrument errors, select Diagnostics, [Select

Sensor], Error List.

Select an error and confirm to identify the cause of the error. Refer to

Table 2.

Table 2 Error list

Error Possible cause Resolution

A/D FAILURE A/D conversion failure Contact Technical Support.

LASER FAILURE Laser did not work correctly

and is turned off

FLASH FAILURE Data log and event log not

working

LOW SIGNAL

ERROR

Signal is too low (less than

3.0 mNTU)

Make sure that the head

assembly is installed

correctly. If not, the red status

light will flash.

Contact Technical Support.

Warnings

When a warning occurs:

• A warning icon flashes and a message is shown on the bottom of the

measurement screen.

• The red status light on the instrument starts flashing.

Warnings do not affect the operation of menus, relays and outputs.

To access the current instrument warnings, select Diagnostics, [Select

Sensor], Warning List.

Select a warning and confirm to identify the cause of the warning. Refer

to Table 3.

20

English

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Hach FT660 sc Basic User Manual

Hach FT660 sc Basic User Manual

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