720A SAFETY NOTICES
1
Model(s) covered by this Safety Notices Manual:
• 720A, Intrinsically Safe Bond Meter and Milli-Ohmmeter
CONTENTS
1. Notices.................................................................................................................... 1
2. Agency Compliance and Required Safety Warnings ....................................................... 2
3. Additional Safety Notices and Information ................................................................... 3
4. Use of Certified Thermocouple Probes ......................................................................... 4
5. Battery Installation and Replacement .......................................................................... 4
1. NOTICES
Copyright Notice
© TEGAM, Inc., 2021
No part of this manual may be reproduced
in any form or by any means (including
electronic storage and retrieval or
translation into a foreign language)
without prior agreement and written
consent from TEGAM, Inc. as governed by
United States and international copyright
laws.
This Manual
Part Number:
720A-903
Revision A, May 2021
Supersedes: No prior revision.
Published by:
TEGAM, Inc.
10 TEGAM Way
Geneva, OH 44041
Disclaimer:
THIS SAFETY NOTICES MANUAL IS
CONTROLLED – CHANGES MAY ONLY
BE WITH APPROVAL OF THE
NOTIFIED BODY.
Safety Notice Symbols and Terms
Safety Notices denote hazards. They
indicate an operating procedure,
instruction, or practice that, if not
correctly performed or followed, could
result in damage to equipment, or injury
or death to personnel. Do not proceed
beyond a Safety Notice until all conditions
and instructions are fully understood and
complied with.
Safety Notice Symbols:
Indicates WARNING or
AVERTISSEMENT
WARNING
Denotes an imminent
hazard that could result
in injury or death to
personnel.
AVERTISSEMENT
Indique un danger
imminent pouvant
entraîner des blessures
ou la mort.
5/26/2021
720A SAFETY NOTICES
2
2. AGENCY COMPLIANCE AND REQUIRED
SAFETY WARNINGS
Ex Hazardous Safety Information
This instrument is intrinsically safe.
WARNING: Substitution of components
may impair intrinsic safety.
Compliance and Markings
E506162
Handheld Bond Meter for Hazardous
Locations Only as to Intrinsic Safety
0539 II 1 G
Ex ia IIA T4 Ga
Class I, Division 1, Group D, T4
Class I, Zone 0 AEx ia IIA T4 Ga
Zone 0 Ex ia IIA T4 Ga
UL 21 ATEX 2549
IECEx UL 21.0038
-10 °C ≤ Ta ≤ +55 °C
The Operation Manual, 720A-900,
contains safety information and warnings
that must be observed for safe operation
under the conditions described. Failure to
comply with the information and
instructions can have serious
consequences. Read the Operation
Manual, 720A-900, in its entirety before
using the instrument.
WARNING –
EXPLOSION HAZARD
To reduce the ignition risk of a flammable or
explosive atmosphere, batteries must be
changed in a location known to be non-
hazardous.
AVERTISSEMENT – RISQUE
D’EXPLOSION
Afin de réduire le risque d’allumage dans une
atmosphère inflammable ou explosive, les
batteries doivent être remplacées dans un
endroit connu pour être non dangereux.
WARNING –
EXPLOSION HAZARD
Batteries are part of the intrinsically safe system.
Use only the specific battery type, manufacturer,
and manufacturer’s part listed in the Manual.
Use of other batteries could impair intrinsic
safety. Batteries may not be mixed.
AVERTISSEMENT – RISQUE
D’EXPLOSION
Les batteries font partie du système de sécurité
intrinsèque. Utiliser uniquement le type et le
modèle spécifique de batterie et les pièces du
fabricant mentionnées dans le manuel.
L’utilisation d’autres batteries pourrait affecter la
sécurité intrinsèque.
WARNING –
EXPLOSION HAZARD
Use only the probe types as listed in the
manual. Use of other probe types could impair
intrinsic safety.
AVERTISSEMENT – RISQUE
D’EXPLOSION
Utiliser uniquement les types de sondes spécifiés
dans le manuel. L’utilisation d’autres types de
sondes pourrait affecter la sécurité intrinsèque.
720A SAFETY NOTICES
3
These warnings must be observed and are noted on the instrument’s battery cover as
shown.
WARNING
DO NOT OPEN BATTERY COMPARTMENT
IN POTENTIALLY HAZARDOUS
ENVIRONMENT, DISCONNECT PROBES
BEFORE OPENING.
ADVERTISSEMENT
NE OUVREZ PAS LE COMPARTIMENT
DE LA PILE DANS UN ENVIRONNEMENT
POTENTIELLEMENT DANGEREUSE.
DÉCONNECTEZ LES CORDONS
D’ESSAI AVANT D’OUVRIR LE
COMPARTIMENT Á PILE.
WARNING
Use only batteries
listed in the manual.
ADVERTISSEMENT
Utilisez uniquement
des piles dans le
manuel d’instruction manuel d’instruction
3. ADDITIONAL SAFETY NOTICES AND INFORMATION
To prevent personal injury while in Ex Hazardous areas, follow the guidelines below:
• NEVER SERVICE THIS UNIT IN AN Ex HAZARDOUS AREA.
• Batteries are part of the intrinsically safe system. Use only the specific battery type and
manufacturers listed in the Operation Manual. Use of other batteries could impair intrinsic
safety. Do not mix batteries of different manufactures. Do not mix fresh batteries with old
batteries.
• Do not take spare batteries into an Ex Hazardous area.
• To reduce the risk of ignition of a flammable or explosive atmosphere, batteries must be
changed only in a location known to be Non-Hazardous.
• Never open the instrument while in an Ex Hazardous area.
• Never store the instrument with batteries installed in an Ex Hazardous area.
• Never use the instrument with the battery cover off.
• Do not put batteries into bags designed to protect parts from electrostatic discharge (ESD).
These bags are specially designed with metal shielding which can short circuit a battery.
• Use only approved accessories with this product in Ex Hazardous areas.
• Use this product only as specified or protection provided by the instrument could be
compromised.
• Never touch the probe(s) to a voltage source.
• Check the integrity of the case prior to using the instrument in an Ex Hazardous area. Look
for any compromises like cracks or missing plastic.
• Always comply with all safety codes.
720A SAFETY NOTICES
4
DO NOT ATTEMPT TO SERVICE THIS UNIT UNLESS YOU ARE QUALIFIED TO DO SO.
WARNING - SHOCK HAZARD
Disconnect probes from DUT and turn the unit off before removing the battery cover. Internal
circuits can present a shock hazard if leads are connected to a source of elevated potential.
When operated in a potentially explosive atmosphere, this unit may not be used if capacitance ,
inductance, or other circuitry is connected to the bond or structure under test.
Do not use this instrument if the housing, probe wiring, probe, or probe handle are damaged or
distorted. Housings and wire insulation are part of the personnel protection system, and if damaged could
expose users to elevated potentials.
WARNING - EXPLOSION HAZARD
Never change batteries, in an environment where explosive or flammable vapors or dust
suspensions may exist.
Do not attempt to recharge alkaline batteries.
Do not put batteries into bags designed to protect parts from electrostatic discharge (ESD).
These bags are specially designed with metal shielding which can short circuit a battery.
Do not expose batteries to extreme heat or fire. Observe all regional laws and regulations when
disposing batteries.
Batteries are part of the intrinsically safe system. Use only the specific battery type and
manufacturers listed. Use of other batteries could impair intrinsic safety.
4. USE OF CERTIFIED PROBES
Use only TEGAM intrinsically safe rated probes with the 720A in potentially hazardous
locations. Use of any other combination probe and cable invalidates the type certification,
which may cause auto ignition in an explosive hazardous location.
5. BATTERY INSTALLATION AND REPLACEMENT
Three (3) AA 1.5 V batteries are used with the instrument. Observe the following when
installing or removing the batteries.
Always change the product’s batteries outside Ex Hazardous areas.
Always turn the instrument off and disconnect any input connections before replacing
the batteries. Re-install the battery compartment cover before resuming use of the
instrument.
The battery compartment is sealed with a rubber gasket. Use care to not damage the
gasket when removing or installing the battery compartment cover.
Remove the batteries when storing the instrument for an extended period or in a
high temperature environment to prevent battery leakage and possible damage to
the instrument.
720A SAFETY NOTICES
5
Use only Zinc-Manganese Dioxide or Alkaline-Manganese Dioxide AA cells
that have been tested by a nationally recognized laboratory to meet the
requirements of UL 60079-11, Sixth Edition.
Use of any other battery will invalidate the Type Certificate and create a hazardous
condition. The only batteries that TEGAM, Inc. has secured such testing, which
are approved for use in the 720A, are listed on the Type Certificate. They are:
• Energizer E91
• Duracell MN1500
Observe proper polarity when installing batteries.
Refer to the Operation Manual, 720A-900, for battery installation detail.
TEGAM INC.
10 TEGAM WAY
GENEVA, OHIO 44041
CAGE Code: 49374
tegam.com
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