Tenma 72-7730A User manual

72-7732A
72-7730A

CHAPTER TITLE PAGE
1
TABLE OF CONTENTS
1.
2.
5
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6
7
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9
10
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11
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12
14
21
24
24
Model 72-7730A/72-7732A: OPERATING MANUAL
Before You Start
Overview
Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
Getting Acquainted
Turning the Meter On
Battery Considerations
Automatic Power Off
Automatic Backlight Off
Low Battery Indication
The Meter Structure
Rotary Switch
Functional Buttons
The Meter Functions Vs Displays
Selecting the Range
Understanding the Display

2
3.
4.
CHAPTER TITLE PAGE
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30
30
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32
34
35
37
39
41
43
44
45
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46
46
Analogue Bar Graph
Using MAX MIN
Making Measurements
Introduction
A. Measuring Voltage
B. Measuring Current
C. Measuring Resistance
D. Testing for Continuity
E. Testing Diodes
F. Measuring Capacitance
G. Measuring Frequency / Duty Cycle
H. Measuring Temperature
I. 4~20mA loop current as % readout
Using Stores, Recall and Send Features
Introduction
Storing and Clearing Readings
Recalling Stored Readings
Using Send
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5.
6.
7.
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50
50
51
52
53
53
54
55
56
57
58
58
59
61
Changing the Default Setting
Introduction
Selecting Setup Options
Maintenance
A. General Service
B. Replacing the Fuses
C. Replacing the Battery
Specifications
Safety and Compliances
Physical Specifications
General Specifications
Feature Summary
Basic Specifications
Detailed Accuracy Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
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CHAPTER TITLE PAGE
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63
63
64
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D. AC Current
E. Resistance
F. Continuity Test
G. Diode Test
H. Capacitance
I. Frequency
J. Temperature
Degrees Celsius
Fahrenheit
K. 4~20mA loop current
Model 72-7730A/72-7732A: OPERATING MANUAL

5
Chapter 1
Before You Start
Overview
This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and
observe all the Warnings and Notes strictly.
Warning
To avoid electric shock or personal injury, read the ì Safety Informationî and ì Rules for Safe Operationî carefully
before using the Meter.
Digital Multimeter 72-7730A (hereafter referred to as the Meter ) is a 20,000 count, 4-1/2 digit, Digital Multimeter
72-7732A (hereafter referred to as the Meter ) is a 40,000 count, 4-3/4 digit, highly reliable auto ranging instrument.
It will measure AC voltage and current, DC voltage and current, Resistance, Capacitance, Frequency, Diodes,
Continuity, Relative Mode, AC True RMS, AC+DC, Low Battery Display, Double Display Backlight, Data Hold, Automatic
Power Off and full overload protection.
Additionally, it provides temperature measurement, 4~20mA loop, data store and recall functions.z
Model 72-7730A/72-7732A: OPERATING MANUAL

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Inspection
Open the package case and take out the Meter. Check the items shown on Table 1-1 carefully to see if any items
are missing or damaged.
Table 1-1. Unpacking Inspection
Item Description Qty
In the event that items are missing or damaged, please contact your dealer immediately.
1
2
3
4
5
6
7
8
9
English Operating Manual
Test Lead
K-Type (nickel chromium ~ nickel silicon) Point Contact Temperature Probe (It is
only suitable for measuring temperature under 230
Alligator Clip
Test Clip
USB interface cable
CD-ROM (Installation Guide & Computer Interface Software)
Carrying Bag
9V Battery (NEDA 1604, 6F22, 006P)
1 piece
1 pair
1 piece
1 piece
1 pair
1 piece
1 piece
1 piece
1 piece
Model 72-7730A/72-7732A: OPERATING MANUAL

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Safety Information
This Meter complies with the standards IEC61010 safety
measurement requirement: in pollution degree 2,
overvoltage category (CAT. III 1000V, CAT.IV 600V)
and double insulation.
CAT. III: Distribution level, fixed installation, with smaller
transient overvoltage 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 may 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 to.
International electrical symbols used on the Meter and
in this Operating Manual are explained on page 9.
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:
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.
Replace damaged test leads with identical model
number or electrical specifications before using the
Meter.
Do not apply more than the rated voltage, as marked
on the Meter, between the terminals or between any
terminal and ground.
To prevent potential damage to the meter, do not
change the position of the rotary switch while
making measurements.
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When 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.
Use the proper terminals, function, and range for
your measurements.
If the value to be measured is unknown, use the
maximum measurement position.
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.
Before measuring current, check the Meterís fuses
and turn off power to the circuit before connecting
the Meter to the circuit.
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.
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 off the meter when not in use. Remove batteries
if the meter is not to be used for a long period of
time.
Routinely check the battery for leaks and replace
immediately of leaks appear. A leaking battery will
permanently damage the Meter.
Model 72-7730A/72-7732A: OPERATING MANUAL

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International Electrical Symbols
Symbols used on the Meter and in this manual are explained in Table1-2.
Table 1-2. International Electrical Symbols
AC or DC Measurement
DC Measurement
AC Measurement
Ground
Double Insulated
Warning. Refer to the Operating Manual
Low Battery
Conforms to Standards of European Union
Model 72-7730A/72-7732A: OPERATING MANUAL

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Chapter 2
Getting Acquainted
Turning the Meter On
To turn the Meter on, turn the rotary switch from OFF
to any switch setting.
Battery Considerations
The Meter uses one 9V Battery (NEDA 1604, 6F22,
006P). The following paragraphs describe several
techniques used to conserve battery power.
Automatic Power Off
The display blanks and the Meter goes into ìsleepî
mode after a set period of inactivity.
While in Sleep mode, pressing the blue button or turning
the rotary switch will reactivate the Meter.. The Meter
then returns to the display for the function selected with
the rotary switch; all previously activated button features
are discarded.
Automatic Backlight Off
Press LIGHT button to turn the backlight on and press
LIGHT again to turn it off. Press EXIT to exit the feature.
Press LIGHT to select the backlight level (low or high).
In Setup menu (see Chapter 5), you could specify a
time to automatically turn off the backlight (10 seconds,
20 seconds, 30 seconds or OFF). If the period is set to
OFF, the backlight feature is disabled.
The automatic power off is preset to 10 minutes. From
the Setup menu (see Chapter 5), you could specify a
time (10 minutes, 20 minutes, 30 minutes or OFF). If
you set to OFF, the Meter retains on until you turn the
rotary switch to OFF or the battery becomes too weak.
Model 72-7730A/72-7732A: OPERATING MANUAL

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Low Battery Indication
A constant battery icon ( ) in the upper left corner
of the display notifies you that the batteries are low and
should be replaced.
Warning
To avoid false readings, which could lead to possible
electric shock or personal injury, replace the battery as
soon as the battery icon ( ) appears
The Meter Structure
The Figure 2-1 shows the Meter structure.
1. LCD Display
2. Functional Buttons
3. Rotary Switch
4. Input Terminals
Figure 2-1. Meter Structure
Model 72-7730A/72-7732A: OPERATING MANUAL

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Rotary Switch
Turn the Meter on by selecting any measurement function. The Meter presents a standard display for that function.
The display may also be influenced by some of the choices made in Setup.
Use the blue button to select any rotary switch alternate function (labeled in blue letters).
When you turn the rotary switch from one function to another, a display for the new function appears. Button choices
made in one function do not carry over into another function.
The Table 2-1 described each rotary switch position
Table 2-1. Rotary Switch Selections
Rotary
Switch Position Rotary Switch Function Blue Key Function
Turn the Meter off
DC voltage measurement
AC voltage measurement
DC millivoltage measurement
DC millivoltage measurement
None
None
None
None
Frequency measurement
Frequency signal duty cycle measurement
OFF
V
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Model 72-7730A/72-7732A: OPERATING MANUAL

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Table 2-1. Rotary Switch Selections
Rotary
Switch Position Rotary Switch Function Blue Key Function
Resistance measurement
Capacitance measurement
Frequency measurement
Centigrade temperature measurement
DC current measurement (400µA , 4000µA)
Diode test
Continuity test
None
Frequency signal duty cycle measurement
Fahrenheit temperature measurement
Toggle between AC or DC current
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µA
A
DC current measurement (40mA , 400mA)
AC or DC current measurement (10A)
Toggle between AC or DC current
4~20mA loop current as % reading
Toggle between AC or DC current
mA
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Functional Buttons
The buttons activate features that augment the function selected with the rotary switch. The buttons are shown
in Table 2-2.
STORE
RECALL
Press the button once to access the main feature (e.g. STORE).
To access the first additional feature of the button (e.g. RECALL), press and hold the button for over 1 second.
This additional feature appears right above or on the left hand side of the appropriate keys.
To access the second additional feature of the button (e.g. ), press once the button again while the Meter has
already entered the first additional feature (e.g. RECALL). The second additional feature appears on the right hand
side above the appropriate keys.
The RANGE and EXIT buttons has only one additional feature.
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Table 2-2. Functional Buttons
Button Description Access Method
RANGE
SETUP
Press the button once.
Press and hold the button while
turning on the Meter
Press and hold the button for more
than 1 second
Range feature:
Exit AUTO and enter MANUAL ranging. In MANUAL, select
next input range. EXIT to return to AUTO. AUTO is default.
Testing resistance signal from calibrator:
When testing resistance signal from calibrator, it is necessary
to press this button to change the maximum display to 4000
counts but the accuracy remains unchanged.
Setup feature:
Access Setup selections, the display shows "SET".
In the Setup mode, each press of SETUP button steps to
the next Selection
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Table 2-2. Functional Buttons
Button Description Access Method
HOLD
Peak HOLD
Press the button
once.
Press and hold the button for over 1
second
Press the button
once after entering Setup mode.
Press the button once.
Press and hold the button for over 1
second.
Store feature:
Store the current measurement value. Press EXIT to exit
the Store feature.
Recall feature:
Recall the stored value. Press EXIT to exit the Recall feature.
Setup feature:
In Setup, press to select OFF at the selection of HIGH and LOW
Hold feature:
Press HOLD to freeze the displayed value. Press EXIT to
release the display.
Peak Hold feature:
Press to access Peak Hold feature, the primary display
shows PEAK HOLD. Press EXIT to exit.
STORE
RECALL
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Table 2-2. Functional Buttons
Button Description Access Method
EXIT
LIGHT
Press the button once after entering
Setup or Recall or Store mode.
Press the button once.
Press and hold the button for over 1
second.
In Setup, each press to select the digit you want to edit.
In Recall, press to enable SEND feature
In Store, press to toggle between clearing all the stored
reading or start storing reading from the current index
number.
Press to exit certain button functions and the Meter will return
to the factory default setting.
Press to turn the backlight on. It is possible to toggle between
1st and the 2nd backlight level and Exit the feature by pressing
this button. After exiting the light feature, it is necessary to
press and hold the button for over 1 second to turn the
backlight on again.
HOLD
Peak HOLD l
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Model 72-7730A/72-7732A: OPERATING MANUAL

MAXMIN
Table 2-2. Functional Buttons
Button Description Access Method
18
Press the button once.
Press the button once after entering
SEND mode.
Press the button once.
Press and hold
the button for over 1 second.
Press the button once after entering
SEND mode.
Press to display max, min and average values.
Press EXIT to stop and return to current measurement mode.
In Setup, each press to decrement an Option.
Press to display max, min and average values.
Press EXIT to stop and return to current measurement mode.
Press to output the data, AUTO mode switch off. The primary
display shows "SEND".
Press EXIT to exit.
In Setup, each press to decrement an Option.
In Recall, each press to go back to the previous stored reading.
In Store, each press to decrease a second on the storing
interval.
Press EXIT to exit
MAXMIN
SEND
Model 72-7730A/72-7732A: OPERATING MANUAL

REL
AC+DC
Table 2-2. Functional Buttons
Button Description Access Method
19
Press the button once.
Press and hold the button for over 1
second.
Press the button once
Press to enter relative mode, the primary display shows .
The left secondary display shows the present measurement
value. The right secondary display shows the stored value.
The primary display shows the present measurement value
minus the stored value.
Press EXIT to exit relative mode.
In Setup, each press to increment an Option.
In Recall, each press to recall the next stored reading.
In Store, each press to increase a second on the storing interval.
When it is at AC measurement mode, press the button to
display AC+DC True RMS value in the primary display and
the left secondary display "AC+DC".
Yellow Button
Model 72-7730A/72-7732A: OPERATING MANUAL