T&R PT30-10 mk2, Руководство по эксплуатации и техническому обслуживанию, Страница: 11 / 28

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The outputs from the instrument are protected by means of an electronic trip circuit. The overload is set
for 12-15mA at the output.
1.5 High Voltage Output Cables and Connectors
. Screened 5 metre long high voltage output cables are provided with the equipment terminated with
large clips. If these clips are not suitable for creating a secure connection to your test object they
should be replaced with a suitable termination. The cable type used is UR67M with a multi-stranded
inner core. The outer screen is connected via the high voltage plug to the ground connection on the
PT30-10.
Longer output cables are available as an optional accessory.
The high voltage plug is protected in transit by a plastic cover attached to the output cable by a nylon
cord.
The high voltage plugs used on the PT30-10 are fully de-mountable.
WARNING
NEVER connect or disconnect the output leads with the unit connected to the mains.
1.6 Metering
The PT30-10 has separate, independent current and voltage metering for each output.
1.6.1 kV Meters
The equipment is fitted with two output kilovolt meters, which monitor both the positive and negative
outputs simultaneously. Both instruments have a single range of 0-30 kilovolts. Each division on the
instruments represent 1 kilovolt. The individual meters are labelled as follows:
a. Positive kV meter: +kV DC
b. Negative kV meter: -kV DC
1.6.2 mA Meters
The equipment is fitted with two output milliammeters, which sense both the positive and negative
output currents simultaneously. The individual meters are labelled as follows:
a. Positive mA meter: +mA DC
b. Negative mA meter: -mA DC
The output mA meters are dual range as follows:
Range 1: 0-10mA Each division being 0.5mA
Range 2: 0-1.0mA Each division being 0.05mA
1.7 Discharge and Earthing
WARNING
The load must be discharged and earthed before any connections are made, broken or touched, and an
earth must be maintained on the test object at all times during testing except when high voltage is
actually applied. The unit has an internal automatic discharge system and is also supplied with a DP40
external discharge probe suitable for discharging higher capacitance loads.