Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 56)

52 DF-745 User Interface

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 Figure 18. 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:

NOTE: When any hydrogen is included in the background gas matrix (see discussion

regarding GSF on page 49 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 fans 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 Failure on page 50.

7.4.7.4 Moisture Alarm Setup

Figure 50: Alarm Setup Screen

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.

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Delta NANOTRACE DF-745 Instruction Manual Page 56