Tenma 72-10405 User manual

72-10405
72-10415
Operating Manual
Digital
Multimeters
P/N:110401108731X
REV.0
DATE:2019/3/2
72-14625

Table of Contents
4
5
6
7
9
10
11
12
13
15
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18
21
24
26
29
31
33
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
A.DC/AC Voltage Measurement
B.DC/AC Current Measurement
C.Measuring Resistance
D.Testing for Continuity
E.Testing Diodes
F.Capacitance Measurement
G.Frequency Measurement
H.Temperature Measurement
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

35
36
36
36
37
37
38
38
38
39
40
41
43
46
49
52
Operation of Hold Mode
RANGE Button
MAX MIN Button
PEAK Button
Data Outputting
The Use of Relative Value Mode
The BLUE Button
Turning on the Display Backlight
Sleep Mode
General Specifications
Accuracy Specifications
A.DC Voltage
B.AC Voltage
C.DC Current
D.AC Current
E.Resistance
Title Page
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59
61
A.Replacing the Battery
B.Replacing the Fuses
Title Page
54
56
57
57
58
F.Capacitance
G.Frequency
H.Diode Test
I.Continuity Test
J.Temperature
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

On addition to the
mode, peak measurement, low battery indication, backlit display, and sleep
mode.
Model 72-10405, 72-14625, and 72-10415
This Operating Manual covers information on safety and cautions. Please read the
relevant information carefully and observe all the Warnings and Notes strictly.
Warning
4
measuring functions, this meters includes a USB interface, data hold, relative
Model 72-10405/72-14625/72-10415: OPERATING MANUAL

USB Interface Cable
Installation Guide & Computer Interface Software (CD-ROM)
1 piece
1 piece
Except where noted, the descriptions and instructions in this Operating Manual apply
to all models 72-10405, 72-14625, and 72-10415 .
Unpacking Inspection
Open the package case and take out the Meter. Check the following items carefully
to see any missing or damaged part:
Description
Operating Manual
Test Lead
Point Contact K type Temperature Probe (72-10405 only)
Multi-Purpose Socket
9V Battery (NEDA1604, 6F22 or 0006P) (installed inside the Meter)
Item
1
2
3
4
5
6
7
Qty
1 piece
1 pair
1 piece
1 piece
1 piece
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

In the event you find any missing or damage, please contact your dealer immediately.
Safety Information
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage
category (CAT. III 1000V, CAT. IV 600V) and double insulation.
CAT III: Distribution level, fixed installation, with smaller transient overvoltages than
CAT. IV.
CAT IV: Primary supply level, overhead lines, cable systems etc.
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 page9.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

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:
lBefore 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.
lInspect the test leads for damaged insulation or exposed metal. Check
the test leads for continuity.Replace damaged test leads with identical
model or electrical specifications before using the Meter.
lDo not apply more than the rated voltage, as marked on the Meter, between
the terminals or between any terminal and grounding.
lThe rotary switch should be placed in the right position and no any
changeover of range shall be made during measurement is conducted to
prevent damage of the Meter .
lWhen the Meter working at an effective voltage over 60V in DC or 30V
rms in AC, special care should be taken for there is danger of electric
shock.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

lDo 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.
lWhen using the test leads, keep your fingers behind the finger guards.
lDisconnect circuit power and discharge all high-voltage capacitors before
testing resistance, continuity and diodes.
lBefore measuring current, check the Meterís fuses and turn off the current
to be tested before connecting the Meter to the circuit. After connecting
the circuit reliably , turn the current to be tested on.
lReplace the battery as soon as the battery indicator appears. W ith a
low battery , the Meter might produce false readings that can lead to electric
shock and personal injury.
lWhen servicing the Meter, use only the same model number or identical
electrical specifications replacement parts.
lThe internal circuit of the Meter shall not be altered at will to avoid damage
of the Meter and any accident.
lSoft 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.
lThe Meter is suitable for indoor use.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

lTurn the Meter off when it is not in use and take out the battery when not
using for a extended amount of time.
lConstantly check the battery as it may leak when it has been using for
some time, replace the battery as soon as leaking appears. A leaking
battery will damage the Meter .
International Electrical Symbols
AC or DC
Double Insulated
Warning. Refer to the Operating
Manual
Grounding
Deficiency of Built-In Battery
Conforms to Standards of
European Union
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

LCD Display
Functional Buttons
Blue button
Rotary Switch
Input Terminal:
figure 1
1
2
3
4
5
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Rotary Switch
Below table indicated for information about the rotary switch positions.
AC and DC Voltage Measurement
AC Voltage Measurement (72-14625 only)
DC Voltage Measurement (72-14625 only)
Resistance Measurement
Diode Test
Continuity Test
Capacitance Test
Frequency and Duty Cycle Test
Temperature in Celsius (72-10405 only)
Temperature in Fahrenheit (72-10405 only)
DCA and ACA Measurement
DCmA and ACmA Measurement
10A DC and AC Measurement
Power off
OFF
mV
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

(72-10405 and 72-14625 only)
(72-10405 and 72-14625 only)
Press and hold for over 2 seconds to enter or exit RS232C or
USB mode.
Functional Buttons
Below table indicated for information about the functional button operations.
Press to select the maximum and minimum value.
Operation Performed
Press and hold for 2 serconds to turn the display backlight on or off.
Press to enter or exit data hold mode.
Press to select the alternate feature
Press RANGE to enter the manual ranging mode;
the Meter beeps.
Press RANGE to step through the ranges available for the
selected function; the Meter beeps.
Press and hold RANGE for 2 seconds to return to autoranging;
the Meter beeps
Press again to exit REL mode
Press to enter REL mode.
Button
Hold
BLUE Button
RANGE
REL
PEAK (72-10415 only)
"CAL" means the meter enter self-calibration mode.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Measurement Operation
A. DC/AC Voltage Measurement (See figure 2)
figure 2
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

72-14625 and 72-10415
72-10405
72-10405
response
72-14625 and 72-10415 If online frequency and duty
cycle values are needed at this moment, only press Hz/% button to obtain
relative data. However input amplitude concerning these two aspects should
follow requirements as below:
Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Note
lIn each range, the Meter has an input impedance of 10M except mV range
which input impedance is 3000M . This loading effect can cause measurement
errors in high impedance circuits. If the circuit impedance is less than or equal
to 10k , the error is negligible (0.1% or less).
lFor 72-10405:When measuring mV, you must press RANGE manually
to enter mV range.
lWhen voltage measurement has been completed, disconnect the connection
between the testing leads and the circuit under test, and remove the testing leads
away from the input terminals of the Meter.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

B. DC/AC Current Measurement (See figure 3)
figure 3
A
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL

Warning
Before connecting the Meter to the return circuit to be tested, cut off the current
of the return circuit.
If the fuse burns out during measurement, the Meter may be damaged or the
operator himself may be hurt.
Use proper terminals, function, and range for the measurement.
When the testing leads are connected to the current terminals, do not parallel
them across any circuit.
To measure current, do the following:
1. Insert the red test lead into the mA or A input terminal and the black test lead
into the COM terminal.
2. Set the rotary switch to A, mA , or A.
3. The Meter defaults to DC current measurement mode. To toggle between DC
and AC current measurement function, press BLUE button.
4. Connect the test lead in serial to the return circuit to be tested. The measured
value shows on the display.
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Model 72-10405/72-14625/72-10415: OPERATING MANUAL