2. For models 5500 and 5600, turn to the BATT.CHECK position and press the test button ⑩. The meter begins to detect battery capacity.
For model 5400, simply turn to the voltage selection position, and the instrument automatically detects battery capacity for 3 seconds. When the pointer stops in the BATT.GOOD zone, the battery is good; otherwise, it needs charging (Type C) or replacement.
3. Turn the rotary switch to select the desired test voltage (500V/1000V/2500V/5000V/10000V).
4. Press or lock the test button ⑩ to start testing. At this time, the high-voltage output indicator above the test button lights up, and the built-in buzzer beeps once every second, indicating that there is high-voltage output at the LINE② terminal.
Warning: During testing, it is strictly forbidden to touch the exposed part of the probe tip to avoid electric shock.
5. When the green LED is on, read the insulation resistance value on the outer scale (high range); when the red LED is on, read the inner scale. After testing, release the test button ⑩, and the meter stops testing. Wait a few seconds before removing the probe from the test circuit. The meter will automatically discharge residual charge in the test circuit.
Warning: After testing or before repeating a test, the tested object must be short-circuited and fully discharged to ground (the meter also has a built-in automatic discharge function, but it takes longer).
6. For a second consecutive measurement, follow steps 3-5.
Note: If the meter is not used for a long time, remove the batteries from the battery compartment to prevent battery leakage from damaging the meter.
3 Usage of the Guard Terminal (GUARD)
In insulation measurements of power cables or when external electromagnetic interference is present, to eliminate the influence of surface leakage and external electromagnetic interference on measurement accuracy, the guard terminal of the meter is used to eliminate leakage current and shield interference.
For test objects with two or more sections, such as arresters and coupling capacitors, the wiring shown in Figure 5 can be used for measurement. In the figure, the guard terminal is connected to the flange of the upper section of the arrester under test, so that interference current caused by the high-voltage line above is shielded by the guard terminal and does not pass through the main test circuit, thereby avoiding the influence of interference current. For the top section of the arrester, its upper flange can be connected to the meter's EARTH terminal and then grounded, so that interference current flows directly to ground. However, the latter cannot completely eliminate interference.
4 Battery Charging (Type C)
1. The meter can be powered by AC or DC, but when the on-site power supply has significant interference or is unstable, battery power is recommended.
2. When using rechargeable batteries for the first time, charge them for more than 6 hours. Otherwise, the meter may not work properly.
3. The charging circuit uses a dedicated intelligent charging management module that can automatically stop charging.
Note: The AC input voltage range of the charging adapter is 220V±15%, to avoid unnecessary losses due to incorrect power connection.
4. Insert the DC end of the charging adapter into the meter's power jack ⑨, and connect the other end to AC power. The charging indicator (red) lights up, and fast charging begins.
5. When the battery is nearly fully charged, the charging indicator (green) lights up, and it switches to slow charging. After a period of time (1-2 hours), the plug can be removed to stop charging and start using the meter.
Note: When the meter is not in use, ensure the rotary switch is in the off position to prevent premature battery depletion.
