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Summary of Contents for HTC DM 91
- Page 2 DIGITAL MULTIMETER OPERATOR’S MANUAL For model DM 91 1. SAFETY INFORMATION WARNING To ensure safety and in order to exploit to the full functionality of the meter, please follow the directions in the section carefully. This multimeter has been designed according to IEC-1010 concerning electronic measuring instruments with an over-voltage category (CAT II) and pollution 2.
- Page 3 LCD Display ① Power Switch ② Backlight set switch ③ Data-hold Switch (H) ④ Rotary Switch ⑤ Input Jack ⑥ Case ⑦ Battery Door ⑧ Brace ⑨ Screw ⑩ 2.2 FUNCTION AND RANGE SELECTOR This meter is a portable professional measuring instrument with large LCD display and back light for easy reading. ...
- Page 4 -- Response: average, calibrated in rms of sine wave NOTES: At the little voltage range, the meter will show unsteady reading when the test leads haven’t reach the circuit, it’s normal because the meter is very sensitivity. When the test leads touch the circuit, you can get the true reading. 3.2.3 DC Current Range Resolution...
- Page 5 -- open circuit voltage: approximate 2.8V 3.2.10 Frequency Testing Rrange Resolution Accuracy 200KHz 100Hz ±(1.5% of rdg + 10 digits) -- Overload Protection: 250V DC or rms AC -- Sensitivity:: 200mV rms and input no more than 10V rms 3.2.11 Temperature Testing Range Resolution Accuracy...
- Page 6 4.6.1 Connect the black test lead to COM jack and the red to V/Ω/CAP jack. 4.6.2 Set the rotary switch at the desired Ωrange position. 4.6.3 Connect test leads across the resistance under measurement. 4.6.4 You can get reading from LCD. NOTE: When only the figure’1’...
- Page 7 temperature measuring socket on the front panel and contact the object to be measured with thermocouple probe. 4.12.4 You can get a reading from LCD. 5. MAINTENANCE WARNING Before attempting to remove the battery door or open the case, be sure that test leads have been disconnected from measurement circuit top avoid electric shock hazard.
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