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9 Maintenance
The Surge Voltage Generators SSG of Syscompact 2000 has a surge capacitor available
which consists of four isolated partial capacitors. Even in the turned off condition these partial
capacitors can show substantial residual charges. For safety reasons, actions which involve
opening the instrument may therefore be only carried out by instructed and authorized
service personnel.
Service Personnel:
- has appropriate training and experience,
- has knowledge about relevant standards, regulations, accident prevention
rules and operating conditions,
- is in a position to perform the required activities and recognize and prevent
possible danger,
- is responsible to immediately report occurring changes in the instrument
which could impair its safe operation,
- is familiar with the instrument, its function and possible sources of danger,
- has adequate knowledge for maintaining and servicing the instrument
- has been authorized explicitly by BAUR to open the instrument and perform
changes on the instrument.
9.1 Adjustment of spark gap
Depending on frequency of use of the surge voltage generator the spark gap should be
checked periodically (min. once a year) for its breakdown voltage which should be in the
range of 0,5 kV and 1 kV.
- Connect to earth H.V. connecting lead in short circuit and short out.
- Turn Syscompact 2000 into position 8kV at Surge Mode.
- Set impulse to Single Impulse
- Proceed acc. to chapter „Placing into operation/Switch on“ and set voltage to
4 kV
- Release single impulse
- Reduce voltage step by step and always trigger a single impulse. As a result,
the voltage should always break down as long as the voltage is higher that 1
kV. Under 500V this should be no longer the case.
If these requirements are met the breakdown voltage is within the tolerance range.
Otherwise, the instrument should be maintained by an instructed service technician.
9.2 Checking discharge unit
Periodic checking of the discharge unit is for the purpose of safety. It should be performed
before placing the instrument into operation in order to avoid influence on the resistance
measurement caused by residual charges in the surge capacitors and temperature increase
in the resistors.
- with instrument switched off, connect ohmmeter to the open terminals of the
connection line
- measure resistance between terminals
The resistance value should be approx. 16,5 kΩ. At deviations of more than 20%, the
instrument has to be serviced only by an instructed service technician before putting it into
operation (see safety rules).