Tenma 72-1055 Operating Manual

72-1055
Operating Manual
Bench Type Digital Multimeter
Overview
Digital Bench-Type Multimeter Model 72-1055 is
a manual ranging, DC / AC current digital multimeter.
This model features a 2000 count, 3-1/2 digit, extra-
large, backlit LCD display.
This easy-to-use instrument provides the user full
measurement and full overload protection, packaged
in a sleek and simple casing that will fit on any bench.
Measurements include DC/AC voltage, DC/AC
current, resistance, frequency, capacitance, temper-
ature, transistor hFE, diode, and continuity
buzzer.
This operating manual covers information on
safety and precautions. Please read all of the
information carefully and observe all the warnings
strictly while using this product.
Unpacking Inspection
Open the box and carefully remove the meter.
Check the following items to see if there are missing
or damaged parts. If you find any missing or damaged
parts please contact your Tenma dealer.
● Operating Manual
● Test Lead
● Alligator Clip
● K Type Temperature Probe
( Maximum 230 Celcius)
● Multi-Purpose Socket
● Power Cord
(AC220V 50Hz DC9V/200mA)
Safety Information
This Meter complies with the standards
IEC61010-1 for pollution degree 2, overvoltage
category (CAT II 1000V) and double insulation. Please
follow these operating instructions while using the
meter to reduce the chance of damage or possible
injury.
1. Inspect both the Meter and the Test Leads before
use. Do not use the Meter and Test Leads
if either is damaged, if the protective hou sing is
removed or the display is blank while in use . Do not
use the meter with the housing removed; ; ; ; ; ; ; ; ; ; ; . Damage
to the case or insulation could cause electric shock
or cause further damage to the meter and any attached
equipment being tested.
2. If test leads are damaged, use only the same
model number or identical electrical specification
replacement parts.
3. Do not touch any cable, connector, terminal or
other circuit being tested with your bare skin or hands.
4. When the meter is being used with voltages over
60V DC or 30V rms AC RMS, additional care should
be taken for added danger of electric shock.
5. Select the correct terminal input and turn the
rotary switch to select the measuring function. If you
are not sure of the current range, simply start with a high
value and adjust down until you get a a reading.
6. Do not overload voltage or current between the
terminals or between the terminals and a ground; ; ; ; ; ; ,
which the meter will indicate the overload.
7. Once the rotary switch is placed in the correct
range position, do not change the range during the
measurement function.
8. Do not use or store the meter in a high temper-
ature, high humidity, flammable, or highly
electromagnetic environment. The performance of
the meter may deteriorate after this type of use.
9. Do not alter the internal circuit of the meter
for any reason. Doing so will cause damage to the
meter, and possibly cause injury or death.
10. Replace the battery as soon as the battery
indicator "
meter might produce false readings that can lead to
electric shock and even personal injury.
11. Turn the meter off when it is not is use. Take out
th e batter ies when not used for extended period of time.
General Specifications
1. Maximum Voltage between terminal input and
COM: 1000V (except 200mV, 230V)
2. μA mA terminal input protection: (CE)250mA 265V
auto recovery fuse
3. 10A terminal input protection: (CE)F1 (10A H
250V) Fast blow fuse Φ5x20mm
4. Resistance input protection: PTC/250V
5. Capacitance input protection: (CE)F2, F3 (0.5A H
250V) Fast blow fuse Φ5x20mm
6. Frequency input protection: PTC/250V
7. Temperature input protection: (CE)250mA 265V
fuse
8. terminal input protection: PTC/250V
9. hFE input protection: (CE)250mA 265V auto
recovery fuse, F3 (0.5A H 250V) Fast blow
fuse Φ5x20mm
10. Display: LCD full function signal display,
maximum reading is 1999 , and updates 2-3 times /sec
11. Range: Manual
12. Polarity Display: Auto
13. Overload indication: 1
14. Battery Deficiency:
15. Operating Temperature: 0～40℃(32℉～104℉)
16. Storing Temperature: -10～50℃(14℉～122℉)
17. Relative Humidity: 0℃～30℃ below ≤75%
18. Electromagnetic Field: Under 1V/m from influence
of radiated radio-frequency electromagnetic field
effect , Total accuracy= specific accuracy+
measurement
1 piece
frequency electromagnetic which do not have any
1 pair
reference data on this topic.
1 pair
19. Power: AC (external power adapter AC110V/
1 piece
DC9V-200mA) or DC (internal battery type 2 R14/1.5V
6 pieces)
1 piece
20. Product size: 300 x 245 x 105 mm
1 piece
21. Product Net Weight : About 3.3 lbs (without
accessories)
22. Safety Compaliances : IEC 61010: CATⅡ1000V
LCD Display
1. Manual Range
2. Warning ！
3.
4.
5.
6. AC
7.
8.
9.
10. Number
11. Units of measurement:
Unit of Voltage: millivolt, volt
mV, V
Unit of current: Microampere, milliampere,
μA, mA, A
ampere
Unit of electrical resistance: Ohm, thousand
Ω, kΩ, MΩ
ohms, trillion ohm s
Unit of electrical capacity: Accepts farad,
nF/μF
microfarad
Unit of Frequency: Kilohertz
kHz
Unit of Temperature: Degree Celsius Factor
℃
Unit of Triode enlargement: Times
β
"appears. With a low battery, the
30℃～40℃ ≤50%
5%, Over 1V/m radiated radio-
Manual Range Indicator
Warning Indicator
Low Battery
High voltage
Negative Reading
Indicator for AC voltage or current
( DC indicator do not display)
Data Hold
Diode Test
Continuity Alarm
Test reading
72-1055 Operating Manual
Functions
Explanation
Symbol Terminal Input
V V COM DC Voltage Measurement
←→
V V COM AC Voltage Measurement
←→
Ω V COM Resistance Measurement
←→
V COM Diode / Continuity Buzzer
←→
Measurement
kHz V COM Frequency Measurement
←→
A
mA/μA DC Current Measurement
mA μA ←→ COM
10A COM ADC Current Measurement
←→
A
mA/μA AC Current Measurement
mA μA ←→ COM
10A COM A AC Current Measurement
←→
F V mA μA
Capacitance Measurement
←→
(Use Multi-Purpose Socket)
V mA μA
Temperature Measurement
←→
℃
(Use Multi-Purpose Socket)
hFE V mA μA Triode Enlargement Factor
←→
Measurement
(Use Multi-Purpose Socket)
Functional Buttons
Power Toggle Button
Display backlight power
LIGHT
Press Hold to enter and exit the hold mode
HOLD
Operational Measurement Guide (see Diagram 1, 2,
3)
Diagram 1
Diagram 2
Diagram 3