twintex TM-197 Operation Manual

DIGITSL MULTIMETER
OPERATION MANUAL
The meter is a high performance, high accuracy, 3 3/4-digit, 32mm digit high by
LCD displaying meter. The function includes DCV, ACV, DCA, ACA,
resistance ,capacitance, frequency, temperature, duty cycle measurement, triode,
diode and continuity test. Also with the function of unit signal displaying ,relative
value measuring ,auto range/ manual range switch ,auto power off and warning
function etc.
SAFETY NOTES
The meter meets with IEC1010standard. Read the notes before operating.
① Before measuring, check the test leads carefully.
② Do not input a value over allowable limited when measuring to avoid electric
shock meter damage.
③ Be careful when measuring voltage over DCV60V, ACV40V.
④ To select correct function.
⑤ The test leads should be taken away from the testing point when changing
function.
⑥ Never take measurement when the test leads are in current terminal.
⑦ Do not try to modify the circuit.
⑧ Safety symbols
" " dangerous voltage
" " GND
" " dual insulation
" " refer to the operation manual
" " low battery
SPECIFICATION
1. General
1-1. Display: 3 3/4digit LCD with a max readings of 3999, Automatic negative
polarity indication.
1-2. Measuring method: Dual-slop integrating A/D converter system.
1-3. Sampling rate: Approx. 3times/second.
1-4. Over range indication: " OL" display.
1-5. Low battery: The " "is display.
1-6. Operating environment : Temperature (0 to 40 ), humidity<80%RH.
℃ ℃
1-7. Storage environment: Temperature (-10 ℃ to 50 ), humidity<80%RH. ℃
1-8. Power: 2pcs 1.5V AAA 7# battery.
1-9. Dimension: 185(L)X93(W)X35(H)mm.
1-10. Weight: Approx. 290g (including battery).
1-11. Accessories: manual, gift box ,holster ,TP01 temperature probe, test leads and 2pcs
1.5V battery.
2. Technical
2.1 Accuracy: ±(a% × reading + digits) at 23±5 ,<75%RH. ℃
2.2 DCV
Range Accuracy Resolution
400mV 0.1mV
4V 1 mV
±(0.5%+4d)
40V 10 mV
400V 100 mV
1000V ±(1.0%+4d) 1V
Input impedance: 400mv range>40MΩ,other range is 10MΩ.
Overload protection: 1000V DC or 700V AC peak value
2.3 ACV
Range Accuracy Resolution
400mV ±(1.5%+6d)
4V
±(0.8%+6d)
40V
400V
750V ±(1.0%+6)
Input impedance: 400mv range>40MΩ,other range is 10MΩ.
Overload protection: 1000V DC or 700V AC peak value
Frequency response: 750V range: 40~100Hz, other range: 40~400Hz
Displaying: sinewave RMS(average value response)
2.4 DCA
Range Accuracy
400uA
4000uA
±(1.0%+5)
40mA
400mA
4A
20A ±(2.0%+5)
Max. measuring volt drop: 400mV under mA range, 200mV under A range.
Max. input current: 20A(less than 15sec.)
Overload protection: 0.5A/250V fuse, 13A/250V fuse.
2.5 ACA
Range
400uA
4000uA
40mA
400mA
4A
20A
Max. measuring volt drop: 400mV under mA range, 200mV under A range.
Max. input current: 20A(less than 15sec.)
Overload protection: 0.5A/250V fuse, 13A/250V fuse.
Frequency response: 40~100Hz under 10A range, 40～400Hz at other range.
2.6 RESISTANCE
Range
400Ω
4kΩ
40kΩ
400kΩ
4MΩ
40MΩ
Open circuit voltage: 400mV.
Overload protection: 250V DC/AC peak value
0.1mV
1 mV 2.7 CAPACITANCE
10 mV
Range
100 mV
4nF
1V
40nF
400nF
4μF
40μF
200μF
Overload protection: 250V DC/AC peak value
WARNING: do not input any voltage at this range! When measuring,
Resolution
the capacitor should be completely released and the power must be
0.1μA
turned off.
1μA
2.8 FREQUENCY
10μA
100μA
Range
1mA
10Hz
10mA
100Hz
1000Hz
10kHz
100kHz
Accuracy Resolution
0.1μA
1μA
±(1.5%+5)
10μA
100μA
1mA
±(2.0%+10) 10mA
Accuracy Resolution
±(0.8%+5) 0.1Ω
1Ω
10Ω
±(0.8%+1)
100Ω
1kΩ
±(1.2%+5) 10kΩ
Accuracy Resolution
±(2.5%+6) 1pF
10pF
100pF
±(3.5%+8)
1nF
10nF
±(5.0%+8) 100nF
Accuracy Resolution
±(0.5%+4) 0.001Hz
0.01Hz
0.1Hz
1Hz
10Hz