Tenma 72-7935 User manual

Table of Contents (1)
Table of Contents
Title Page
Overview
Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Functional Buttons
Measurement Operation
A. DC Voltage Measurement
B. AC Voltage Measurement
C. Measuring Resistance
D. Frequency and Duty Cycle Measurement
E. Measuring Diodes & Continuity
F. Capacitance Measurement
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Model 72-7935: OPERATING MANUAL

Table of Contents (2)
Title Page
Sleep Mode
General Specifications
Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. Resistance Test
D. Frequency
E. Duty Cycle
F. Diodes and Continuity Test
G. Capacitance
Maintenance
A. General Service
B. Replacing the Battery
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Model 72-7935: OPERATING MANUAL

Overview
Overview
Warning
The Digital Multimeter Model 72-7935 (hereafter referred to as the meter) is a highly
reliable handheld measuring instrument featuring a variety of functions in a compact
design. Features include a 3-3/4 digit LCD display and dual A/D converters and will
measure AC/DC voltage, resistance, capacitance, frequency, duty cycle, diode and
continuity. Additional capabilities include relative mode, data hold, full icon display
and sleep mode.
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Model 72-7935: OPERATING MANUAL
To avoid the risk of injury from electric shock, read the “Safety Information”
and “Rules For Safe Operation” carefully before using the meter.

Unpacking Inspection
Inspection
This meter includes the following items:
Item
1
2
3
4
Description
English Operating Manual
Built-In Test Lead
Vinyl Holder
3V Button Battery (CR2032)
Qty
1 piece
1 pair
1 piece
1 piece
In the event items missing or damaded, please contact your dealer immediately.
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Model 72-7935: OPERATING MANUAL

Safety Information
Safety Information
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage
category (CAT. II 300V) and double insulation.
CAT. II: Local level, appliance, PORTABLE EQUIPMENTetc., with smaller transient voltage
overvoltages than CAT. III
Use the Meter only as specified in this operating manual, otherwise the protection
provided by the Meter may be impaired.
In this manual, a Warning identifies conditions and actions that pose hazards to the
user, or may damage the Meter or the equipment under test.
A Note identifies the information that user should pay attention on.
International electrical symbols used on the Meter and in this Operating Manual are
explained on page 9.
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Model 72-7935: OPERATING MANUAL

Rules For Safe Operation (1)
Rules For Safe Operation
Warning
To avoid possible electric shock or personal injury, and to avoid possible
damage to the Meter or to the equipment under test, adhere to the following
rules:
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Before using the Meter inspect the case. Do not use the Meter if it is damaged
or the case (or part of the case) is removed. Look for cracks or missing
plastic. Pay attention to the insulation around the connectors.
Inspect the test leads for damaged insulation or exposed metal. Check the
test leads for continuity.
Do not apply more than the rated voltage, as marked on the Meter, between
the terminals or between any terminal and grounding.
The rotary switch should be placed in the desired position prior to connecting
leads. This position should not be changed while leads are connected.
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Model 72-7935: OPERATING MANUAL

Rules For Safe Operation (2)
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When using the Meter at an effective voltage over 60V DC 30V rms AC,
special care should be taken for there is danger of electric shock.
Use the proper terminals, function, and range for your measurements.
Do not use or store the Meter in an environment of high temperature, humidity,
explosive, inflammable and strong magnetic field. The performance of the
Meter may deteriorate after dampened.
When using the test leads, keep your fingers behind the finger guards.
Disconnect circuit power and discharge all high-voltage capacitors before
testing resistance, continuity, diodes or capacitance.
Replace the battery as soon as the battery indicator appears. With a low
battery, the Meter might produce false readings that can lead to electric
shock and personal injury.
Remove the connection between the testing leads and the circuit being
tested, and turn the Meter power off before opening the Meter case.
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Rules For Safe Operation (3)
When servicing the Meter, use only the same model number or identical
electrical specifications replacement parts.
The internal circuit of the Meter shall not be altered at will to avoid damage
of the Meter and any accident.
Soft cloth and mild detergent should be used to clean the surface of the
Meter when servicing. No abrasive and solvent should be used to prevent
the surface of the Meter from corrosion, damage and accident.
The Meter is suitable for indoor use only.
Turn the Meter power off when it is not in use and take out the battery when
not using for a long time.
Periodically check the battery for leaks, a leaking battery will damage the
meter.
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Model 72-7935: OPERATING MANUAL

International Electrical Symbols
International Electrical Symbols
Low Battery
AC (Alternating Current)
Capacitance
Double Insulated
Warning. Refer to the Operating Manual
Conforms to Standards of European Union
Ground
DC (Direct Current)
Diode
Continuity Test
Fuse
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Model 72-7935: OPERATING MANUAL