Measuring Protective Conductor Current - Leica DM2700 M Service Manual

Even though the limit value for the insulation resistance is 2 M, the
insulation resistance is typically in the G range. If the value you measured
is not in the G range and you cannot find a reason for this behavior, please
contact cms.support@leica-microsystems.com.
Figure 7: Insulation measurement
11.4.4

Measuring Protective Conductor Current

The protective conductor current (or leakage current) is the current through the ground
protection conductor (PE). It must be less than 3.5 mA. Below, we will describe the procedure
with an adapter cable and the Amprobe AC50A leakage current clamp multimeter.
1. Disconnect all peripheral devices.
2. Connect the device to the line voltage using the adapter cable and the power supply
cord.
3. Switch on all switches on the device.
4. Clamp the leakage current clamp multimeter onto the ground protection conductor
(PE) of the adapter cable.
5. Set a measurement range from 40 mA.
6. Measure the protective conductor current. It must be less than 3.5 mA.
7. Enter the measured value into the inspection report.
8. Only FSU: Repeat the measurement for the second power supply cord.
Service Manual Leica DM2700 M/P, Part A: Safety and Handling
Version 02
11 Electrical Acceptance Test
11.4 Measurements in Detail
A-15