Appendix C
– Alarm States For Older Instruments
Thermo Scientific
Product Manual for the ERS 500 Suppressor
Page 84 of 84
031956-11
For Research Use Only. Not for Use in Diagnostic Procedures.
Appendix C – Alarm States for Older
Instruments
C.1 Alarm States for the CD20/ED40 (Dionex DX-500 Instruments)
When using these detectors, the power setting will be shown on the screen when the suppressor
is on. The suppressor cable must be connected to the controller and conductive liquid must be
flowing to prevent an alarm state.
When the ERS Control unit is in shutdown mode after detecting a malfunction in the system, an
alarm message “SRS Alarm” will flash on the screen. To determine the cause, press “Menu”
proceed to the “Diagnostic Menu” and press “Analog Status.” On the left side of the screen, two
fields give the ERS status as shown below:
SRS CONNECTED: Y (or N)
This indicates that the suppressor is connected. If it shows “N” connect the ERS cable.
SRS OVER VOLT: N (or Y)
This indicates whether the suppressor has a voltage higher than it can support (7.5 to 8 V). Try
lowering the power setting on the front panel. Also, see
, “The Alarm Red LED”
for other causes.
