Innova 3340 Mode d'emploi

Instruction MRP #93-0067 Rev. A

2007

17352 Von Karman Ave

Irvine, CA 92614

Rev. B

2011

www.equus.com

1

Table of Contents

Title

Page No.

INTRODUCTION .................................................................. 2

SAFETY PRECAUTIONS/WARNINGS .............................. 2

SPECIFICATIONS ............................................................... 3

CONTROLS AND INDICATORS ........................................ 8

TESTING PROCEDURES .................................................. 10

AUXILIARY FUNCTIONS .................................................... 17

BATTERY AND FUSE REPLACEMENT ............................ 18

MAINTENANCE.................................................................... 18

SERVICE PROCEDURES .................................................. 22

INTRODUCTION

•

Congratulations. You have purchased a precision instr ument

manufactured to the highest quality standards . This Digital

Automotive Tester is a general-purpose instrument designed

for use in gener al electronics, home electrical applications,

and automotive electrical/electronic systems.

•

This tester is designed to test or measure AC voltage, DC

voltage, DC current, AC current, resistance, diodes, continu-

ity, frequency, duty cycle, pulse width, rpm and temperature.

•

Please take the time to read these operating instructions thor-

oughly and completely. Failure to follow these instructions may

result in electrical shock, instrument damage and/or damage

to the equipment under test. Always use e xtreme caution

when working on or around electrically operated equipment.

SAFETY PRECAUTIONS/ WARNINGS

Do not operate this tester bef ore reading this man ual in its

entirety. The following guidelines must be followed to avoid acci-

dents that can result in electr ic shock or personal injury.

•

Pay close attention to WARNINGS stamped on the front

and rear of the tester’s case. These warnings, as well as all

warnings and precautions used through out this manual, must

be followed to avoid electric shock and/or personal injury.

•

The RESPONSIBLE PARTY shall be made aware that, if the

equipment is used in a manner not specified b y the manu-

facturer, the protection pro vided by the equipment ma y be

impaired.

•

Before using an y of the functions on this tester , verify its

proper operation on a kno wn similar function source where

the unit value is also known. Take corrective action based on

the indicated results.

To prevent electrical shock and/or damage to the tester or the

equipment under test, observe the following safety precautions:

•

DO NOT apply more than the r ated voltage, as marked on

the tester, between terminals or betw een any terminal and

earth ground.

•

Use caution when working above 30V AC rms, 42 V peak, or

60 V DC. Such voltages pose a shock hazard.

•

To avoid false readings that could lead to possib le electric

shock or personal injury, replace the batteries as soon as the

low battery indicator displays.

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•

Always inspect the tester , test leads and an y other acces-

sories for damage prior to every use. If any damage is found,

do not use tester until repairs are done.

•

Always consider electrical and electronic equipment to be ener-

gized (live). Never assume any equipment is de-energized.

•

Do not connect probes to any available (unused) terminal while

the meter is connected to a hazardous liv e circuit.

•

Never ground yourself when taking electrical measurements.

Isolate yourself from ground by using dr y rubber insulating

mats to co ver all exposed/grounded metal. Stand on r ubber

mats and wear dry clothing.

•

Never take resistance measurements on energiz ed (live)

electrical or electronic equipment.

•

Use one hand, instead of tw o, whenever possible to tak e

measurements. If two hands must be used, use extreme cau-

tion not to contact any energized conductors with your hands.

Be certain test leads are dry and clean.

•

Do not hold the tester when taking measurements . Place the

tester on a clean, insulating surface prior to taking any meas-

urement.

•

Don't become part of the circuit. Think safety. Act safely.

If working on a vehicle, take the following added precautions:

•

Only work on vehicle in a well ventilated area.

•

Always wear safety eye protection.

•

Avoid moving fan blades or any potentially moving parts.

•

Avoid hot engine parts.

•

Put transmission in "park" (automatic transmission vehicles) or

"neutral" (manual transmission vehicles). Set the parking brake.

•

Turn the ignition "off" before connecting or disconnecting any

testing equipment.

•

Put blocks on drive wheels.

•

Avoid wearing loose clothing or je welry when working on a

vehicle.

•

Read your vehicle's service manual and follow it's safety pro-

cedures.

SPECIFICATIONS

GENERAL SPECIFICATIONS AND FEATURES

•

3-3/4 digit LCD display (maximum reading of 4000)

•

Range Control: Auto Range

•

Automatic negative (-) polarity indication

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Automatic zero adjustment

•

Over range indicator (except 15 A function). Displays "OL" on

LCD

•

Low battery indicator. Displays battery symbol on LCD

•

Automatic power shut off (after 10 idle minutes)

•

Pollution Degree 2

•

Measuring circuit category II

•

Operating environment:

Temperature - 32° to 104° F. (0° C to 40° C)

Humidity - Less than 80% relative humidity (non-condensing)

Altitude - up to 6562 ft (2000 meters)

•

Storage environment:

Temperature - 4° to 140° F (- 20° to 60° C)

Humidity - Less than 90% relative humidity (non-condensing)

•

Power Supply: Two 1.5V AA batteries

•

Fuse: 0.500A/250V 5X20 mm (Radio Shac k, GMA/270

series; #270-1047) fuse

•

Dimensions:

Height - 6.81 in. (173 mm)

Width - 6.57 in. (167 mm) (includes test lead clips)

Depth - 1.69 in. (43 mm)

•

Weight (including batteries): approximately 9.1 oz (260 g)

ELECTRICAL SPECIFICATIONS

DC VOLTS

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Range Resolution Accuracy Overload Protection

400mV 100µV 250V DC RMS

4V 1mV

±(0.8% of

40V 10mV

reading

400V

+ 5 digits)

600V DC/AC RMS

600V

1V

±(0.8% of

reading

+ 5 digits)

Input impedance: 10MΩ for all ranges.

AC VOLTS

RESISTANCE (OHMS)

DC CURRENT (AMPS)

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Range Resolution Accuracy Overload Protection

40mA 10µA

±(1.5% of 0.5A/250V fast fuse

reading (Input Voltage

400mA 100µA

+ 5 digits) Drop: <

0.2V.

±(2.5% of

Unfused; 15sec maximum

*15A 10mA reading

Input Voltage Drop: <

0.2V.

+ 5 digits)

*A waiting period of at least 15 minutes is necessary between

every 15 second testing period.

Range Resolution Accuracy Overload Protection

400Ω 0.1Ω

4kΩ 1Ω

±(1.0% of

40kΩ 10Ω

reading

400kΩ 100Ω

+ 5 digits)

250V DC/AC

4MΩ ±(2.0% of

40MΩ

10kΩ

reading

+ 5 digits)

Range Resolution Accuracy Overload Protection

400mV 100µV ±(1.2% of 250V DC RMS

reading

+8 digits)

4V 1mV

±(0.8% of

40V 10mV

reading

400V

+ 8 digits)

600V DC/AC RMS

600V

1V

±(1.2% of

reading

+ 8 digits)

Input impedance: 10MΩ for all ranges.

Frequency response: 50 - 400Hz

AC CURRENT (AMPS)

DIODE/CONTINUITY TESTS

TEMPERATURE

FREQUENCY

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Function Range Resolution Description Note

Diode Test 2V 1mV Test Current:

1±0.6mA

Test Voltage:

Overload

Approx. 2.8V

Protection:

Continuity 400Ω 0.1Ω Approx. 120Ω or

250V DC or

Test less, buzzer

AC RMS

(beeper) will

sound

Range Resolution Accuracy Overload Protection

40mA 10µA ±(2.0% of

0.5A/250V fast fuse

400mA 100µA reading

+ 5 digits)

Input Voltage Drop: <0.2V.

Frequency response: 50 - 400Hz

Range Accuracy Overload Protection

32°F to 104°F ±5°F/±3°C

(0°C to 40°C)

-58°F to 392°F ±1.5%/±5°F

(-50°C to 200°C) (±1.5%/±3°C) 0.5A/250V fast fuse

392°F to 752°F ±2%/±5°F

(200°C to 400°C) (±2%/±3°C)

WARNING

To avoid fire and/or electr ical shock hazards, DO NOT con-

nect the thermocouples to circuits greater than 30 Vrms, 42.4

Vpk or 60 Vdc.

Range Resolution Accuracy Overload Protection

9.999Hz- 0.001Hz ±(0.1% of

2MHz reading 250V DC or AC RMS

+ 5 digits)

Sensitivity: <100kHz: 2V RMS; >100kHz: 5V RMS

DUTY CYCLE/PULSE WIDTH/DWELL

RPM

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Function Range Accuracy Overload Protection

Duty Cycle 0.1 to ±(2.0% of

99.9% reading

+ 5 digits)

Pulse Width 1 to 999 ±(3.0% of 0.5A/250V fast fuse

ms positive reading

±2 ms)

Dwell Angle 1-12 ±(2.0% of

cylinders reading

+ 5 digits)

Range Resolution Accuracy Overload Protection

0-10000 1RPM ±(2.0% of

RPM reading 0.5A/250V fast fuse

+ 5 digits)

Frequency response: 50 - 400Hz

WARNING

Risk of Explosion. This equipment has inter nal arcing and

sparking parts, which should not be e xposed to flammable

vapors. This equipment is only suitab le for installation in a

garage having sufficient air circulation to be considered a

non-hazardous location.

WARNING

Ignition coils produce a very high voltage. To reduce the risks

of electric shock when conducting RPM tests, DO NOT touch

the uninsulated ends of the test probes , the ignition coil, or

the coil terminals when the engine is running.

CONTROLS AND INDICATORS

1. DCV Function: Measures DC

volts. Auto-ranging from 0 to

600 volts (10 MΩ impedance)

2. ACV Function: Measures AC

volts. Auto-ranging from 0 to

600 volts (10 MΩ impedance)

3. Press SEL button (see item

19) to select desired function:

•

Resistance Function :

Measures resistance. Auto

ranging from 0 to 40M Ω

(40,000,000Ω).

•

Continuity Function :

Tests for continuity be-

tween two points.

•

Diode Function : For

testing diodes.

4. Frequency Function. Measures frequency. One range:

9.999Hz to 2MHz.

5. Pulse Width Function: Measures the length of time (in mil-

liseconds) that a solenoid or actuator is energiz ed (“ON”

time) during a one-cycle time per iod. One range: 1 to 999

ms.

6. Duty Cycle Function Measures the percentage of time

that a solenoid or actuator is energized (“ON” time) during a

one-cycle time period. One range: 0.1 to 99.9%.

7. Temperature Function (Celcius): Measures temperature in

°C. Auto-ranging from -50°C to +400°C . (Optional “K-Type”

thermocouple required).

8. Temperature Function (Fahrenheit): Measures tempera-

ture in °F. Auto-ranging from -58°F to +752°F. (Optional “K-

Type” thermocouple required).

9. Press SEL button (see item 19) to select desired function:

•

ACmA Function: Measures AC current in milliamps .

One range: 0 to 400 milliamps.

•

DCmA Function: Measures DC current in milliamps .

One range: 0 to 400 milliamps.

10. 15A Function: Measures DC current. One range: 15Amps

(DC from 0 to 15 amperes). Unfused.

11. Clamp Current Function : Measures AC/DC cur-

rent; optional Clamp adapter required.

12. DIS RPM Function: Measures RPM on v ehicles with

Distributorless Ignition Systems (DIS) using an optional induc-

tive pickup. One range: 0 to 10,000 rpm.

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19

20

1

2

3

4

5

6

7

8

2324172526

9

10

11

12

13

18

14

15

16

21

22

13. CON (Conventional) RPM Function: Measures RPM on

vehicles with conventional ignition systems using an optional

inductive pickup. One range: 0-10,000 rpm.

14. COP RPM Function: Measures RPM on vehicles with “Coil

On Plug” ignition systems. One range: 0 to 10,000 rpm.

15. RPM (Tach) Function: Measures RPM. One range: 0 to

10,000 rpm.

16. Dwell Angle Function : Measures dwell angle of break-

er points.

17. OFF Function: Turns unit “off” when function is selected.

18. Function/Range Selector Switch: Selects desired function

or range.

19. Data HOLD Button: Turns the Data Hold function “on” and

“off” (see “Auxiliary Functions” on page 17 for details).

20. MAX/MIN Record Function: Turns the Maxim um

Value/Minimum Value Record Mode “on” and “off” (see

“Auxiliary Functions” on page 17 for details).

21. SEL (Select) Button: Selects the desired function when the

Function/Range Selector Switch (item 18) is set to the

Resistance/Continuity/Diode position (item 3), ACmA/DCmA

position (item 9) or Clamp Current Position (item 11).

22. CYL (Cylinder) Button: Selects the number of cylinders for

the vehicle under test when the Function/Range Selector

Switch (item 18) is set to the RPM (T ach) function (item 15)

or Dwell Angle function (item 16).

23. Volts, OHMS, DIODE, CONTINUITY and FREQUENCY

Input Jack.

24. COM Input Jack: Common Input Jack.

25. 15A Input Jack. For red test lead probe connection when

measuring high DC current (up to 15 amps only).

26. DWELL ANGLE, MS °C, °F, BAT, ACmA/DCmA, CLAMP

CURRENT, RPM and COP Input Jack.

27. Liquid Crystal Display (LCD): Displays results of tests or

measurements.

Preparation and Caution Before Use

•

Inspect the Digital Automotive Tester for damage to the case.

Do not use if cr acked, distorted, excessively dirty or an y

abnormal condition exists.

•

Inspect the test leads f or damage. Check for cracked insula-

tion, broken or damaged probes, loose or bent probe pins. Do

not use if any abnormal condition exists.

•

Set the Function/Range Selector Switch to the proper r ange

BEFORE taking measurements. If the r ange/function must

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be switched during a test, ALWAYS remove the test leads

from the circuit being measured before switching settings.

•

To avoid possible electric shock, instrument damage, and/or

equipment damage when taking voltage or current measure-

ments, DO NOT exceed the maximum value of the selected

range.

•

If the tester is used near high noise Radio F requency (RF)

generating equipment (spar k plug wires , ignition coils or

alternator), the display may become unstable or indicate large

errors. If you obtain err atic readings dur ing use, isolate the

tester as far away as possible from these components.

TESTING PROCEDURES

A. AC/DC VOLTAGE MEASUREMENT

1. Plug the BLACK test lead into "COM" jack of the tester; plug

the RED test lead into the "V" jack.

NOTE: If alligator clip adapters (not included with tester) are to

be used on the test leads , use suitable rated and UL cer tified

alligator clips.

2. Set the tester’ s Function/Range Selector Switch to the

appropriate DCV or ACV position as desired (see

Controls and Indicators, Items 1 and 2).

3. Place the RED test lead onto the positive (+) side of the item

being tested and the BLACK test lead onto the negativ e (-)

(across the source/load) side of the item.BE CAREFUL not to

touch any energized conductors with any part of your body.

4. Read the results on the display.

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WARNING

To avoid possible electric shock, instrument damage

and/or equipment damage, DO NOT attempt to measure

voltages ABOVE 600V AC/DC or take measurements if

the voltage is unknown. 600V AC/DC between the COM

and V jacks is the maximum voltage that this instrument

is designed to measure. The "COM" terminal potential

should not exceed 300V AC/DC measured to ground.

B. RESISTANCE MEASUREMENT

ΩΩ

(OHMS)

1. Plug the RED test lead into the "

ΩΩ

" jack of the tester ; plug

the BLACK test lead into the "COM" jack.

2. Set the tester’s Function/Range Selector Switch to the

position (see Controls and Indicators, Item 3).

3. Press the SEL button, as necessary, until the ( AUTO) icon

is shown on the display.

NOTE: To obtain accur ate readings, disconnect at least one

side of the item under test from the circuit or circuit board before

measuring resistance.

4. Place the RED test lead onto one side of the item being test-

ed and the BLACK test lead onto the other side of the item.

(Polarity does not matter when checking resistance).

5. Read the results on the display.

C. DIODE TEST

NOTE: A diode is a semiconductor de vice that lets current flow in

one direction only. If the diode to be tested is par t of a circuit

(with other electronic components), you must isolate it from the

other components by disconnecting at least one side of it from

the circuit before testing. A good diode will sho w a low voltage

drop across its junction (0.5-0.8 volts for a silicon diode or about

0.3V for a germanium diode) when the leads are connected in

one polarity and a v ery high resistance (or open circuit) when

the leads are reversed (connected in the opposite polar ity).

1. Plug the RED test lead into the jack of the tester; plug

the BLACK test lead into the "COM" jack.

2. Set the tester’s Function/Range Selector Switch to the

position (see Controls and Indicators, Item 3).

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WARNING

To avoid electrical shock and/or damage to the multimeter,

ensure the power is removed from the circuit before any

DIODE testing procedure is conducted.Test diodes on de-

energized (dead) circuits only, never on live circuits.

WARNING

Resistance measurements must be made on "de-ener-

gized" (dead) circuits ONLY. Impressing a voltage across

the multimeter's terminals while set to any resistance

range may result in electric shock, instrument damage

and/or damage to equipment under test. MAKE SURE

equipment is completely de-energized before taking any

resistance measurements.

3. Press the SEL button, as necessar y, until the icon is

shown on the display.

4. Place the RED test lead onto one side of the diode being

tested and the BLACK test lead onto the other side .

5. Read the results on the display.

6. Reverse the test leads and again read the results on the dis-

play. Compare the two readings. One reading should indi-

cate a voltage drop value; the other reading should indicate

an overrange (OL) condition.

See note above

.

D. CONTINUITY TEST

1. Plug the RED test lead into the jack of the tester ; plug

the BLACK test lead into the "COM" jack.

2. Set the tester’s Function/Range Selector Switch to the

position (see Controls and Indicators, Item 3).

3. Press the SEL button, as necessar y, until the icon is

shown on the display.

4. Place the RED Test Lead to one end of the wire or de vice

being tested for continuity and the BLACK Test Lead to the

opposite end.

5. Listen to the sound of the beeper and confirm the results by

reading the display.

NOTE: The beeper will sound only if the continuity of the item

under test (resistance betw een the tw o test leads) measures

less than 120 ohms.

E. FREQUENCY MEASUREMENT

Frequency is the number of times that an event repeats itself during

a one-second time period. Frequency is measured in Hertz (Hz).

1. Plug the RED test lead into the “Hz” jack of the tester; plug

the BLACK test lead into the "COM" jack.

2. Set the tester’s Function/Range Selector Switch to the Hz

position (see Controls and Indicators, Item 4).

3. Place the RED test lead onto the signal output wire of the

sensor or circuit under test and the BLACK test lead onto a

good chassis ground (consult the wiring diagram in the vehi-

cle’s Service Manual for proper connections).

4. Read the results on the display.

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WARNING

To avoid electric shock, shut off the power to the test arti-

cle before testing it for continuity.

F. PULSE WIDTH MEASUREMENT

Pulse Width is the length of time that a solenoid or actuator is

energized (“ON” time) during a one-cycle time per iod. Pulse

Width is measured in milliseconds (ms).

1. Plug the RED test lead into the “ms” jack of the tester; plug

the BLACK test lead into the "COM" jack.

2. Set the tester’s Function/Range Selector Switch to the ms

position (see Controls and Indicators, Item 5).

3. Place the RED test lead onto the signal output wire of the

sensor or circuit under test and the BLACK test lead onto a

good chassis g round (consult the wir ing diagram in the

vehicle’s Service Manual for proper connections).

4. Read the results on the display.

G. DUTY CYCLE MEASUREMENT

Duty Cycle is the percentage of time that a solenoid or actuator

is energized (“ON” time) during a one-cycle time per iod. Duty

Cycle is measured in percent (%).

1. Plug the RED test lead into the jack of the tester ;

plug the BLACK test lead into the "COM" jack.

2. Set the tester’ s Function/Range Selector Switch to the

DUTY% position (see Controls and Indicators, Item 6).

3. Place the RED test lead onto the signal wire of the sensor

or circuit under test and the BLA CK test lead onto a good

chassis ground (consult the wir ing diagram in the v ehicle’s

Service Manual for proper connections).

4. Read the results on the display.

H. TEMPERATURE MEASUREMENT

NOTE: Temperature measurement requires use of an optional

“K-type” thermocouple.

1. Plug the Positive (+) test lead of the “K-type” thermocouple

into the °C / °F jack of the tester ; plug the Negative (-) test

lead into the “15A” jack.

2. Set the tester’s Function/Range Selector Switch to the °C or °F

position, as desired (see Controls and Indicators, Items 7 and 8).

3. Read the results on the display.

13

WARNING

To avoid fire and/or electr ical shock hazards, DO NOT con-

nect the thermocouples to circuits greater than 30 Vrms, 42.4

Vpk or 60 Vdc.

I. AC/DC CURRENT MEASUREMENT (AMPS)

1. Plug the RED test lead into the or the "15A" jack of

the tester, as applicable; plug the BLACK test lead to the

"COM" jack.

2. Set the tester’ s Function/Range Selector Switch to the

appropriate Amps range position as desired (see Controls

and Indicators, Items 9 and 10).

•

Use the SEL button (see Controls and Indicators , item

20) to select DC Amps or AC Amps, as desired.

•

To measure from 0 to 400mA, set the Selector Switch to

.

•

To measure from 400mA to 15 Amps DC , set the

Selector Switch to the "15A" position.

3. Disconnect the battery, or shut off the po wer to the circuit

being tested.

NOTE: To measure current on a particular circuit, you must open

up the circuit and connect the test leads in series with the circuit

before a reading can be obtained.

4. Disconnect one end of the wire or de vice, from the circuit

where current will be measured.

5. Place the RED test lead on the disconnected wire and place

the BLACK test lead at the location from which the wire was

disconnected (series connection).

6. Reconnect the batter y, or apply po wer to the circuit being

tested.

7. Read the results on the display.

CAUTION: After the test is completed, shut the power off to

the circuit before removing the test leads and before recon-

necting any disconnected wires or devices.

NOTE: If the reading obtained is a negative number, reverse the

test leads.

14

WARNING

To prevent electrical shock when performing current

measurements, follow all steps as indicated below DO

NOT skip any steps or take any short cuts.

The 15A range is not fused. To avoid current hazard

and/or damage to the tester, DO NOT try to take meas-

urements on circuits that have more than 15 amps. DO

NOT take more than 10 seconds to take the reading. A

waiting period of AT LEAST 15 MINUTES is necessary

between every 15 second testing period.

J. CLAMP CURRENT MEASUREMENT

NOTE: Clamp current measurement requires use of an optional

Clamp adapter. The optional Clamp adapter has not been e val-

uated by UL.

1. Plug the RED test lead from the Clamp adapter to the

jack of the tester; plug the BLACK test lead into the " COM"

jack.

2. Set the tester’ s Function/Range Selector Switch to the

position (see Controls and Indicators, Item 11).

3. Clamp the Clamp adapter around the wire or cable from the

source or load under measurement.

4. Read the results on the display.

K. COP RPM AND RPM (TACH) MEASUREMENT

1. Plug the RED test lead into the " RPM." jack of the tester ;

plug the BLACK test lead into the "COM" jack.

2. Place the RED test lead onto the “Tachometer Signal port”

of the vehicle’s ignition system, or onto the negative (-) side

of the ignition coil. Place the BLACK test lead onto a good

chassis ground or the negative (-) terminal of the battery.

NOTE: If your vehicle is equipped with a COP (Coil On

Plug) system and you are using the setting, make the

RED test lead connection to the negativ e (-) side of one of

the ignition coils.

3. Set the tester’s Function/Range Selector Switch to the

or position, as appropr iate (see Controls and

Indicators, Items 14 and 15).

15

WARNING

Risk of Explosion. This equipment has inter nal arcing and

sparking parts, which should not be e xposed to flammab le

vapors. This equipment is only suitab le for installation in a

garage having sufficient air circulation to be considered a non-

hazardous location.

WARNING

Ignition coils produce a v ery high voltage. To reduce the r isk of

electric shock when conducting RPM tests , DO NOT touch the

uninsulated ends of the test probes , the ignition coil, or the coil

terminals when the engine is running.

4. Press the CYL button, as necessary, until the correct num-

ber of cylinders f or the vehicle under test is sho wn on the

display.

NOTE: Cylinder selection is not applicable to COP (Coil On

Plug) systems.

5. Start the engine and read the results on the displa y.

L. CON AND DIS RPM MEASUREMENT

NOTE: CON or DIS r pm measurement requires use of an

inductive pickup.

1. Turn the ignition off. DO NOT CONNECT THE INDUCTIVE

PICKUP WITH THE ENGINE RUNNING OR WITH THE

IGNITION ON.

2. Clamp the inductive pickup clamp around the No . 1 spark

plug wire.

3. Plug the RED inductive pickup lead into the " RPM." jack of

the tester; plug the BLACK inductive pickup lead into the

"COM" jack.

4. Set the tester’s Function/Range Selector Switch to the

or position, as appropr iate (see Controls and

Indicators, Item 12 and 13).

NOTE: Cylinder selection is not required when using the

inductive pickup.

5. Start the engine and read the results on the displa y.

16

WARNING

Risk of Explosion. This equipment has inter nal arcing and

sparking parts, which should not be e xposed to flammab le

vapors. This equipment is only suitab le for installation in a

garage having sufficient air circulation to be considered a non-

hazardous location.

WARNING

Ignition coils produce a v ery high voltage. To reduce the r isk

of electric shock when conducting RPM tests, DO NOT touch

the inductive pickup, the ignition coil, or the coil ter minals

when the engine is running.

M. DWELL ANGLE MEASUREMENT

NOTE: Turn the vehicle’s engine “off” BEFORE connecting the

multimeter for DWELL ANGLE MEASUREMENT.

1. Plug the RED test lead into the jack of the tester; plug

the BLACK test lead into the "COM" jack.

2. Place the RED test lead to the “BREAKER POINTS” or “-”

terminal of the ignition coil and the BLA CK test lead to

“GROUND” or the “-” terminal of the battery.

3. Set the tester’s Function/Range Selector Switch to the

position (see Controls and Indicators, Item 16).

4. Press the CYL button, as necessary, until the correct num-

ber of cylinders f or the vehicle under test is sho wn on the

display.

5. Start the engine and read the results on the displa y.

AUXILIARY FUNCTIONS

A. DATA HOLD FUNCTION

The data HOLD function lets you “lock” the currently displayed

value into the display. The value remains on the display until the

function is turned “off.”

1. With the desired value shown on the display, press and hold

the HOLD button for approximately two seconds, until the

HOLD icon shows on the display. The current value is now

“locked” in the display.

2. Press the HOLD button again to turn the function “off.” The

HOLD icon will disappear, and the v alue will no longer be

“locked” in the display.

NOTE: The data HOLD function is not available for the DIODE

TEST, CONTINUITY TEST or PULSE WIDTH MEASUREMENT.

B. MINIMUM/MAXIMUM VALUE FUNCTION

The MAX/MIN function records and saves the maximum and/or

minimum readings that were achieved during a test.

1. Prepare the tester to perf orm the desired test as f ollows

(refer to the detailed TESTING PROCEDURES starting on

page 10 for the specific connections and settings for the test

you wish to perform):

•

Plug the test leads into the appropr iate jacks.

•

Set the tester’s Function/Range Selector Switch to the

appropriate position.

•

Connect the test leads to the item to be tested.

17

2. To record Maximum/Minimum readings, press and release

the MAX/MIN button to place the tester in MAX/MIN mode .

The MAX icon will be visib le on the displa y. Perform the

desired test; the

maximum

reading achieved during the test

will be recorded and saved in the tester’s memory.

3. Press the MAX/MIN button again. The MIN icon will be visi-

ble on the displa y. Perform the desired test; the minimum

reading achieved during the test will be recorded and saved

in the tester’s memory.

•

To scroll between MAX and MIN readings that are stored

in the tester’ s memory, rapidly press and release the

MAX/MIN button.

4. To exit MAX/MIN mode press and hold MAX/MIN button for

approximately 2-3 seconds, or until MAX/MIN icons disap-

pear from the display.

•

The tester will save the MAX/MIN readings in memory until

the MAX/MIN mode is exited or the tester is turned off.

NOTE: MAX/MIN functions is not applicab le to the Diode ,

Continuity or Frequency Functions.

BATTERY AND FUSE REPLACEMENT

1. Turn the Digital A utomotive Tester “OFF” and remove the

test leads.

2. Replace the fuse or batteries as necessary:

•

For battery replacement:

Remove one screw from the battery compartment cover.

Use your finger or a small coin to remo ve the co ver.

Remove the batteries and replace them with two AA (1-

1/2 Volt alkaline batteries.

•

For fuse replacement:

Remove the three scre ws (you must remove the meter

stand to remo ve the third scre w) on the bac k of the

meter and separate the case. Remove the fuse from the

fuse holder and replace with a 0.500A/250V - UL Listed

Bussmann, GMA Type (Radio Shack GMA/270

Series: #270-1047) fuse.

NOTE: Use a 0.500A/250V, 5x20mm type fuse ONL Y -

Bussmann, GMA Type (Radio Shack #270-1047 or similar).

Using an incorrect fuse may result in serious injury and/or damage

to the unit.

3. Reassemble the cover/case and secure with the screws.

18

MAINTENANCE

1. No periodic maintenance is required other than the

replace-ment of the battery, the fuse, and visual inspection

of the meter.

2. Keep the tester clean and dry. DO NOT use solvent to clean,

use a damp (not wet) cloth and fully dry after cleaning.

3. The only replaceab le parts are the 1.5 AA batter ies,

0.500A/250V fuse (see page 18 f or battery and fuse

replacement) and the Test Leads (for Test Leads call ser v-

ice department).

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Innova 3340 Mode d'emploi

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