Tenma 72-1055 User manual

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

● During measurement, Diodes with a good silicon
display will read the approximate resistance value.
Ω. The
if the measured resistance is greater than 10
When measuring continuity, the buzzer will sound
●
● Do not use over a 10A current measurement.
accurate resistance readings.
measured resistance value of your test to come up with
reading obtained. Subtract this value from the actual
–circuit the test leads before testing and record the
● The test leads and the internal meter wiring will
readings, choose shorter test leads for this type of
capacitors when measuring resistance.
● To maintain measurement accuracy, disconnect
The meter will measure up to a 20A current, but any
danger of sparking.
circuit, disconnect
● Before connecting the Meter in line with a return
This loading effect can cause measurement
errors in high impedance circuits.
10MΩ.
be obtained).
voltages higher than 1000 V (although reading may
warning signal will be displayed.
this is not done correctly, an alarm will sound and a
●
rotary switch to select the measurement function. If
1. Select the correct terminal input and turn the
hFE
Warning:
Range Alarm Alert On False Terminal Input
V Hz Ω 10A mAμA
mAμA ℃ hFE F 10A
10A mAμA
2.DC or AC Voltage Measurement
from electric shock, please do not attempt to measure
● The Meter has an input impedance of
3.DC or AC Current Measurement
damages to the Meter.
4.Measuring Resistance, Diodes, Continuity or
Capacitance
● When measuring high resistance on 1MΩ or
above, it is normal to take several seconds to
obtain a stable reading. In order to obtain stable
measurement.
～
measurement when measuring low resistance. To
obtain accurate readings in low-resistance, short
～
Accuracy Specications
Operating temperature: 18℃～28℃
Environmental humidity: Less than 75%RH
1. DC Voltage
Range Resolution
Maximum Voltage Input: 1000V (Except 200mV,
250V)
2. AC Voltage
Range Resolution
Maximum Voltage Input: 750Vrms
Frequency: 45Hz～400Hz
Display: True RMS
3. DC Current
Range Resolution
* When ≥5A, Continuous measurement less than 10
seconds at an interval more than 15 minutes.
4. AC Current
Range Resolution
Frequency: 45Hz～400Hz
* When ≥5A, Continuous measurement less than 10
seconds at an interval more than 15 minutes.
5. Resistance
Range Resolution
6. Capacitance
Range Resolution
*>40μF capacitance measurement as reference
purpose.
7. Frequency
Range Resolution
Input Amplitude:
(2kHz range) 50mV≤a≤30Vrms
(200kHz range)150mV≤a≤30Vrms
8. Temperature
～ ℃
℃ ℃
～ ℃
>100～1000℃
thermocouple can only be used on less than 230℃
temperature measurement.
9. Diode Test
10. Continuity Test
Range Resolution Remarks
11. Transistor hFE
Range Resolution Remarks
Replacing the battery(see Diagram 4)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
Accuracy Tolerance:±(% Reading+Digits)
0.5～0.8V as the normal value.
Ib 0 i s a bout 10μA, Vce is
about 2.5V
Diagram 4
Fuse
Power adapter
Specifications and other information shown on this
instruction manual are subject to change without
notice
To avoid personal injury or damage to the meter
the circuit current to avoid any
current over 10A could cause personal injury and
circuit power and discharge any high voltage
add about 0.1Ω0.2Ω of error to resistance
junction typically drop to 500mV 800mV.
Input impedance is on average 10MΩ
Input impedance is on average 10MΩ
Accuracy Tolerance:±(% Reading+Digits)
20V
10mV
200V
100mV
±(1.0%+4)
1000V
1V
2V
1mV
±(0.8%+3)
200mV 0.1mV
2V 1mV
200V 100mV
1000V 1V ±(0.8%+3)
200μA 0.1μA
2mA 1μA
20mA 10μA
±(0.8%+2)
200mA 0.1mA
10A 10mA
±(2.0%+4)
2mA
1μA
20mA
10μA
±(1.0%+3)
200mA
0.1mA
10A
10mA
±(2.5%+5)
2MΩ
1kΩ
200kΩ
100Ω
20kΩ
10Ω
±(0.8%+3)
2kΩ
1Ω
200Ω
0.1Ω
20MΩ 10kΩ ±(1.2%+5)
±(1.5%+5)
2kHz 1Hz
200kHz 100Hz
-40 -20 -(8%+5)
±(2.5%+2)
1
℃
Range Resolution
>-20 0 ±(1.2%+4)
>0 100 ±(1.2%+3)
1mV
Range Resolution Remarks
Open circuit voltage is appx 3V,
Silicon junction drops between
When the circuit is disconnected with a resistance
value >100Ω, buzzer does not beep.
When the circuit has a good connection with a
resistance value ≤10Ω, the buzzer beeps continuously.
1β*
C Cell (R14)1.5V x6
±(4%+3)
±(5%+5)
20nF 10pF
2μF 1nF
200μF* 100nF
1Ω* O p e n c i r c u i t v o l t a g e i s
approximately 3V
thermocouple. The included point contact K -type
* Therm ocouple: It is sui table t o use K -type
20V 10mV ±(0.5%+2)
Accuracy: ±(% reading + digits), guaranteed for 1 year
Made in China for Tenma