2.DC or AC Voltage Measurement
3. DC or AC Current Measurement
4. Measuring Resistance, Diodes, Continuity or
Capacitance
Technical Specifications
1. DC Voltage
4. AC Current
Replacing the battery or the fuse (See Diagram 4)
5. Resistance
6. Capacitance
7. Frequency
8. Temperature
9. Diode Test
10. Continuity Test
11. Triode hFE
2. AC Voltage
3. DC Current
72-14630
Tenma Test Equipment
300 S. Riverside Plaza #2200
Chicago IL, 60606
USA
www.Tenma.com
Alarm sounds on false terminal input
1. Please select correct terminal input and also turn the
rotary switch to select correct measuring function and
range. If not, the buzzer beeps and the warning signal
flashes.
● To avoid personal injury or damage to the unit due to
electric shock, please do not attempt to measure any
voltage higher than 1000 V though reading may be
obtained.
● The unit has an input impedance of approximately
10MΩ (ACV input impedance of approximately 2MΩ)
，
which can cause measurement errors for high impedance
circuits, so input impedance must be taken into account.
● Before measuring the current, the circuit under test
should be de-energized first. Remember that it should be
connected in series with the circuit to be test.
● Never use it to measure current higher than 10A.
Though it is possible to get a readout for any current
below 20A, but it may damage the unit or endanger
yourself.
● For an accurate measurements, de-energize the circuit
to be tested and discharge any capacitors.
● When measuring a resistance equal or higher than
1MΩ, it is normal for the unit to take several seconds to
obtain a stable reading. In order to obtain a stable reading,
choose shorter test leads to carry out measurement.
●
When measuring low resistance, the test leads and the
internal wiring of the unit will incur a resistance around
0.1Ω
~
0.2Ω. To obtain accurate reading, short-circuit the
test leads beforehand and record the reading obtained,
such reading should be deducted from the final readout to
ensure the accuracy of the measurement.
● If the diode to be tested is a silicon diode junction, it is
normal if the reading falls into a scope between 500mV
and 800mV. For continuity tests, if the resistance between
two terminals is greater than 100Ω, it is considered to be
an open circuit. If the resistance is less than 10Ω, then it
is a close continuous circuit, signaled by an audible alert.
The readout then is nearly equal to the resistance of the
circuit.
Accuracy: ± (% of the r digits), 1 year guarantee
Environmental temperature: 18
℃
~
28`C
Environmental humidity: Less than 75% RH
Accuracy Tolerance:±(% of the r digits)
Input Impedance:Average 10MΩ
Maximum Voltage Input: 1000V (Except for 200mV 250V)
Accuracy Tolerance:±(% of the r digits)
Input Impedance: about 2MΩ.
Maximum Voltage Input: 750Vrms
Frequency: 45Hz
~
400Hz
Displays effective value of sine wave(mean value
response).
Accuracy Tolerance:±(% of the r digits)
* When ≥5A, continuous measurement should be less
than 10 seconds at an interval more than 15 minutes.
Accuracy Tolerance:±(% of the r digits)
* Frequency response: 45Hz
~
400Hz
When ≥5A, continuous measurement should be less
than 10 seconds at an interval more than 15 minutes.
Accuracy Tolerance:±(% of the r digits)
When >100MΩ, the result is for reference only.
Accuracy Tolerance:±(% of the r digits)
* When >40μF, the result is for reference only.
Accuracy Tolerance:±(% of the r digits)
Input Amplitude a:
(2kHz range) 50mV≤a≤30Vrms
(200kHz range) 150mV≤a≤30Vrms
Accuracy Tolerance:±(% of the r digits)
* Temperature Transducer: K type thermocouple
(Point contact, made of nickel-chromium or nickel-
silicon) is included as an accessory, which can only
be used to measure temperature less than 230
℃
.
Open circuit voltage is around 3V;
for Silicon P-N junction, 0.5
~
0.8V
is considered as a normal value.
Open circuit voltage is
approximately 3V
If the resistance between two terminals is tested to
be more than >100Ω, it is considered as open circuit,
the buzzer does not beep or it is in good connection
if it is equal or less than ≤10Ω, the buzzer keeps
beeping.
1 b0 is about 10μA, Vce is
about 2.5V
Specifications and safety information contained in this
manual are subject to change without further notice.
750
P/N:110401108720X
REV.0
Aug.2019
