T&R KV mk2 Series, Operating And Maintenance Manual

Page: 14 / 30

14
1.6 Metering
The KV mk2 series range use a tap on the secondary of the HV transformer for voltage
metering. This can be more accurate than primary metering, although capacitive loads will still
cause the meter to read low.
If very accurate kV metering is required, it is necessary to use an external HV divider.
All of the units use moving coil analogue meters.
1.6.1 Metering Ranges
Unit
Voltmeter FSD mA meter FSD
X1 X0.5 X1 X0.1
KV30-100 40kV 20kV 120mA 12mA
KV50-100 60kV 30kV 120mA 12mA
KV50-200 60kV 30kV 240mA 24mA
KV100-100 120kV 60kV 120mA 12mA
1.6.2 IMPORTANT NOTE - Metering Connections
It is essential that the metering lead from the high voltage transformer to the control unit is
connected in circuit. If this lead is not connected, the metering on the control unit will not
function and the variable overload trip will not function.