Thermo Fisher Scientific Alpha DO 2000 - Manual (Page 15)

Instruction manual
Alpha DO 2000
2.3.3 LED Indicators
Relay indicators
If REL key is pressed the LED (A, B or W) indicates to which Relay
(A, B or Wash) the displayed limit values refer.
Relay mode indicators
Auto LED lights if relay operation is set to automatic mode. Manu
LED lights if relay operation is set to manual mode.
Relay status indicators
LED lights if limit value is exceeded or the ATC probe fails.
LED lights green if measured value is within the limit for Relay A
LED lights red if measured value exceeds limit for Relay A.
LED lights green if measured value is within the limit for Relay B
LED lights red if measured value exceeds limit of Relay B
LED lights if cleaning cycle is on.
2.3.4 Security Codes
The access to Calibration mode, Setup mode and Manual relay operation
mode is protected with security codes. The security codes are set at the
factory and cannot be changed by the user. The following security codes are
used:
Security code Mode/Description
000 View only mode/ to view settings
11 Calibration mode/ to start calibration
22 Setup mode/ to configure parameters
22 Manual relay operation mode/ to switch to relay
operation mode from AUTO to MANUAL
7