Repair and maintenance of the instrument
1. This is a precision instrument. Without the authorization of the products center of the company, please do not alter
any circuit, replace any component or perform any calibration or repair of the product.
2. All test leads, accessories or optional fittings of the instrument cannot be replaced, repaired or substituted
randomly.
Before opening the battery back cover, be sure to disconnect the probe from any voltage source. Do
not use the instrument until the cover is closed and fixed.
Troubleshooting
If your instrument fails, you may wish to check it yourself as follows before you determine that the instrument must
be repaired.
No display on screen, no response from buttons
1. If there is no power supply, please make sure that the battery in the device is not exhausted and the battery and
battery slice are intact and correctly connected.
2. Turn the knob to the shutdown position and then to the measurement position.
Not measurable
Please check the goodness of the test leads (the test leads are short-circuited on and off).
Current cannot be measured
The fuse is blown. You should replace the fuse.
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