• Product Use

Typically, the infrared thermometer makes laser point as an indication of the measured range. The principle of infrared thermometer is the average temperature within the measured circle, if there are multiple temperature points within the circle or the measured circle exceeds the measured object, the measured temperature may be inaccurate, in such case, if infrared thermometer with dual lasers is used, the range of the measured circle can be obtained accurately, to prevent over range of measured temperature, inaccurate temperature, and other issues.

Because of the design.
The test principle of earth clamp tester: The clamp jaw needs to emit a magnetic field with high power so as to generate current for measurement of earthed conductor, so the clamp jaw keeps buzzing, but it does not affect the measurement.

No, the applicable AC voltage of RCD tester is 195V~253V, the three-phase voltage is 380V.

For insulation test, the insulation resistance at a certain moment can not entirely reflect the insulation performance of tested object, as the insulation resistance absorbs and polarizes electric charges after high voltage is applied on the insulation material. For insulation tests on sites with main transformers, cables, motors and others, absorption ratio (the ratio between R60s and R15s) and polarization index (the ratio between R10min and R1min) should be measured, so as to determine the insulation performance.

This phenomenon is normal. 5.5GΩ will be displayed when the insulation resistance of measured object exceeds the specified range of the tester, it is recommended to test an object with resitance below 5GΩ.

The multimeter has relative measurement mode. Press REL button to enter relative mode. Take capacitance measurement as an example, when REL button is pressed, the displayed capacitance will be reset. To obtain the measured value, the open-circuit value will be subtracted by the displayed value.
Measured value = Displayed value – Open-circuit value
Note: It is recommended to perform measurement in REL mode if the measured capacitance is ≤1uF.

Because the air is moist and the moisture content in the vaseline applied on the PCB pad is increased. Please wipe out the vaseline on the PCB pad and apply new vaseline, or perform measurement when the air is dry.

Answer 1: DC and wave form are displayed on the screen, DC indicates the multimeter is in DC mode, and wave form indicates AC voltage measurement. Please press AUTO button to switch to AC mode.

Answer 2: Turn the rotary switch to corresponding measurement gear (AC or DC gear). If the measured signal is not known, please press AUTO button so as to detect the optimum test signal.

Fault code: 204. Cause: wrong calculation. Solution: operate again as per the user manual.

1. Fault code: 204. Cause: wrong calculation. Solution: operate again as per the user manual
2. Fault code: 220 Cause: low battery. Solution: replace batteries or recharge.
3. Fault code: 255 Cause: weak received reflected light or long measurement time. Solution: improve the reflecting surface (By using reflector, white paper, etc.)
4.Fault code: 256 Cause: received signal is too strong. Solution: improve the reflecting surface (By using reflector or white paper. Do not perform measurement by aiming at strong light)
5. Fault code: 261 Cause: over range. Solution: perform measurement as per the specified range.
6. Fault code: 500 Cause: hardware failure. Solution: contact with the supplier if same problem occurs after the product is turned on/off multiple times.

The common cause is that the hall component is damaged, it is recommended to send the product to manufacturer for maintenance.

If the measured voltage is 100V, the actual displayed value will be between 98.8V and 101.2V.