Page 2
1. General information This digital multimeter is a high-quality, high-precision, safe meter. Suitable for professional engineers, maintenance engineers, teaching, etc. Please read carefully this operation manual and pay attention to safety guidelines before operating this meter. 1.1 Safety information 1.1.1 Safety instructions ...
AC voltage. Before the tests on electric resistance, diode, continuity, the operator must cut off the power supply to the circuit to be measured, and discharge all high-voltage capacitors within the circuit to be measured. The electric resistance measurement or continuity test cannot be carried out in any live electrical circuit.
The designated replacement parts must be used at the moment of maintenance. The operator must cut off all relevant power supplies before opening the meter. At the same time, the operator must avoid damage to the meter's elements by ensure that he himself doesn't carry any static.
Page 5
2.2 Description of the symbols on the display unit Table.1 Symbols Symbol Description Low Battery Indicator To avoid electric shock or personal injury as a result of incorrect reading, promptly replace the battery when the battery under voltage indicator appears. Auto power off indicator Negative input polarity indicator Duty cycle...
Page 6
2.3 Description of functional keys Description of functions Press the key to hold the measured value for the current HOLD moment Press the key again to cancel this function. Voltage measurement position: press the key to select DC voltage or AC voltage measurement mode. Current measurement position: press the key to select DC current or AC current measurement mode.
Page 7
Reading Hold mode The reading hold mode can keep the current reading on the display and the symbol “ ”.change the measurement function position or press “ HOLD ”button again to exit the data hold mode. Backlight and lighting function Short press button to turn on backlight;...
Page 8
The value of the AC voltage measured with this meter is True RMS (root mean square). These measurements are accurate for sine wave and other waves (without DC offset), square wave, triangular wave and step wave. 3.2.2 Electric resistance measurement To avoid the meter or the measured equipment from damage, do not attempt a resistance measurement unless the operator has already cut off all power sources for the circuit to be measured and...
Page 9
socket respectively. 3. Connect the test leads in black and in red to the positive and negative poles of the diode to be tested respectively. 4. The meter displays the forward bias value of the diode to be tested. If the polarity of the test lead is reversed, the meter will display "OL".
3.2.6 Measurement of DC current and AC current Do not attempt a measurement on the current in a circuit, if when the voltage between the open-circuit voltage and the ground is over 250V. If the fuse is blown at the moment of measurement, you are likely to damage the meter or get yourself hurt.
Page 11
3.2.8 Measuring temperature To avoid any electric shock and/or damage to the meter, do not attempt a frequency measurement if the voltage is over 250V for DC current or AC current(valid value). position and press “FUNC/Hz” to choose 1. Turn the rotary switch to the 2.
Page 12
or AC (valid value) Protection of protective tube: mA position: protective tube F 600mA/250V; A position protective tube F 10A/250V Rotation rate: approximately 3 revolutions/second Display unit: 6000 counts displayed on LCD screen. Automatically display the symbol for unit in accordance with measurement function position. ...
Page 13
4.2.3 Frequency Measuring range Resolution Accuracy 9.999Hz 0.001Hz 99.99Hz 0.01Hz 999.9Hz 0.1Hz 9.999KHz 0.001KHz ± (1.5%Reading +5 digits) 99.99KHz 0.01KHz 999.9KHz 0.1KHz 9.999MHz 0.001MHz Input voltage range: 200mV-10V AC valid value. Overload protection: 250V DC/AC 4.2.4 Duty Cycle Measuring range Resolution Accuracy 1%~99%...
Page 14
4.2.7 Diode Functions Testing conditions Forward DC current: approximately 1.2mA; Open-circuit Diode test voltage: approximately 3.2V. The display unit shows the approximate value of the diode's forward voltage drop. The buzzer beeps when the resistance is less than 30 Overload protection: 250V DC/AC 4.2.8 DC current Measuring range Resolution...
Page 15
4.2.10 Temperature Measuring Range Resolution Accuracy -20℃~1000℃ 1℃ ±(1% readings +3 digits) -4℉~1832℉ 1℉ ±(1% readings +3 digits) Overload protection:250V DC/AC 5. Meter maintenance This section provides the basic information on maintenance, including the descriptions about replacement of protective tubes and batteries. Do not attempt the meter maintenance unless you are experienced in maintenance and have read the information on calibration, performance test and maintenance.
Page 16
5. Take out the old batteries carefully and replace with 3 pcs 1.5 V AAA new batteries. 6. Fix the battery cover. Fuse replacement When fuse is blown, replace with the same type of fuse. 1. Turn off the power of the meter and take out the holster. 2.
Need help?
Do you have a question about the MT-1236 and is the answer not in the manual?
Questions and answers