Stanford Research Systems RGA100, Operating Manual And Programming Reference

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9-8 Basic Troubleshooting
SRS Residual Gas Analyzer
Error Code: PS7
Type of Error: 24VDC P/S.
Error Message:
External 24V P/S error: Voltage >26V.
Error Cause: Voltage output of 24VDC Power Supply exceeds the acceptable 22-26V DC
range. The Power LED is turned off and the Error LED is turned on instead.
Troubleshooting: Check the voltage output of the external power supply with a voltmeter.
Adjust the voltage to 24 V in adjustable external supplies or replace the power
supply altogether if necessary.
Contact SRS for units with a built-in power supply (Option 02).
Error Code:
RF4
Type of Error: Quadrupole Mass Filter RF P/S.
Error Message: RF P/S Error: Power Supply in current limited mode.
Error Cause:
The circuit that drives the primary of the RF Transformer is in current limited
mode.
Troubleshooting: Check for a short in the quadrupole connections.
Error Code: RF6
Type of Error:
Quadrupole Mass Filter RF P/S.
Error Message: RF P/S Error: Primary Current exceeds 2.0 Amps.
Error Cause: The circuit that drives the primary of the RF Transformer is delivering an
unusually large current.
Troubleshooting:
Check for a short in the quadrupole connections.
Error Code: RF7
Type of Error: Quadrupole Mass Filter RF P/S.
Error Message:
RF P/S Error. RF_CT exceeds (V_EXT-2V) at M_MAX.
(M_MAX=100 for the RGA100, 200 for RGA200 and 300 for RGA300)
Error Cause: The RF P/S goes out of regulation when the quadrupole mass filter is set to
M_MAX amu.
Note: When RGA Windows detects an RF7 error, it automatically tests the RGA
Head and quickly determines the maximum mass value at which the RGA mass
filter can be operated reliably (i.e. without the RF P/S going out of regulation). If
the available mass range is smaller than the user’’s selected scanning range, a
warning is immediately displayed on the PC screen. The user can then choose to
proceed (i.e. ignore the problem at own risk) or can get information on how to
Troubleshoot the problem by pressing the Help button.
This problem should not be ignored since it can be associated to erroneous