Servomex NanoTrace DF-760E, Instruction Manual

Page: 66 / 182

62 DF-760E User Interface
The temperature alarm indicates an out of specification ambient temperature condition in
the analyzer cabinet.
The pressure range alarm is related to the pressure in the gas path.
Finally, system errors are monitored, and under certain conditions will trip alarms if
enabled.
NOTE: When any hydrogen is included in the background gas matrix (see discussion
regarding GSF on page 103 for additional information), an additional alarm is enabled to
monitor the cabinet exhaust fan status. If the system detects a failure in the operation of the
cabinet exhaust fan while operating in a hydrogen background, the system immediately
isolates the moisture cell until the fan is repaired. A warning describing this condition will
appear over the main display and the user will be unable to restore gas flow until the fan is
repaired. See Fan Alarm on page 105.
An alarm warning will overwrite the moisture level readout if an alarm condition exists. To
acknowledge the alarm simply hit the
Enter
button and its number or letter will appear in
the Alarm Status line above the display. See page 45. This action will not clear the alarm.
Only restoration of the condition that existed prior to the alarm will clear the alarm.
Following is a list of alarm code abbreviations that can appear in the Status Line:
Alarm Number Function
1 Moisture Level 1
2 Moisture Level 2
3 Moisture Level 3
4 Moisture Level 4
5 Oxygen Level 1
6 Oxygen Level 2
7 Oxygen Level 3
8 Oxygen Level 4
T Temperature
P Pressure
S System
Table 8: Alarm Codes
7.5.6.1 Moisture Alarm Setup
The Setpoint value refers to the limit above or below which the alarm is triggered. The
Trip command sets the above/below parameter. The deadband refers to the value from the
nominal setpoint that the output value must exceed before an alarm is reset. The Relay
Assignment indicates to which relay the alarm is assigned.
Use the
Next
key to move from between fields and use the arrow keys ( and

to
change the highlighted selections and to enter numerical values. When done, use the
Next
key to move to the
Accept
button and hit the
Enter
key to return to the main display.
Using the
ESC
key at anytime will exit the screen making no changes and return to the
main display.