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User manual
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Diode fuse and power connectors are located at the rear of the device.
Fig.3. MS021 tester. Back view:
1 – Diode fuse; 2 – Power connector.
5. APPROPRIATE USE
1. Use the tester as intended (see Section 1).
2. The tester is designed for indoor use. Be aware of the following operating constraints:
2.1. The tester should be used in the spaces equipped at the temperature range from +10 °С
up to +30 °С.
2.2. Do not use the device when the air temperature is negative or the humidity is high (over
75%). Do not turn on the tester immediately after moving it from a cold room (or from outdoors)
into a warm one as its components may be covered with a condensate. Keep it off at room
temperature for at least 30 min.
2.3. Avoid leaving the device in direct sunlight.
2.4. Keep away from heating devices, microwaves, and other temperature-raising equipment.
3. Avoid dropping the tester or spilling technical liquids on it.
4. Any interference with the electric diagram of the device is strictly prohibited.
5. Turn off the tester when it is not in operation.
6. Do not leave the device with closed probes for more than 2 minutes.
7. Working with a measuring probe, keep your fingers on the plastic part of it. Touching the metal
part of the measuring probe may cause measurement errors.
8. The device is equipped with a system for diagnostics of the probes condition. If any fault is
detected, the "PROBE PROBLEM" message will appear on the screen. The "DIODE BREAKDOWN"
message that appears when the probes are open, signals the probe failure.