XDT User’s Manual Appendices
Appendix A: Flow Diagram of Operating State User Interface
Power ON initialization | 30 seconds anywhere (other than | appears when changing |
and sign on message | "Calibration") without key press | settings of locked unit |
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| HI/LO | ˚C |
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and/orHIFlashingLO | correspondingindicates | energizednotrelays | DEWPOINT PSI |
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| SET |
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| HI |
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| HIAlarm |
| SET |
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| HI | ˚C |
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| DEWPOINT |
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installed | Setting |
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| SET |
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| HI | ˚C |
options are |
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alarm |
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| SET |
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if |
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| LO |
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(Relay2) |
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Displayedonly |
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| LOAlarm |
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| SET |
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| LO | ˚C |
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| DEWPOINT |
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| Setting |
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| SET |
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| LO | ˚C |
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values
Toggle Pressure Correction
Viewing Dewpoint
Flashing PSI indicates pressure corrected dewpoint
SHORT PRESS
LONG PRESS
AND PSI MODE
Set activity options
Set trigger dewpoint
Set hysteresis
Set activity options
Set trigger dewpoint
Set hysteresis
1/2 sec | |
| Toggle 14.7 psi |
SET |
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VALUE | View/Set |
PSI | Sensor |
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{ | Pressure |
SHORT PRESS | |
values |
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| LONG PRESS |
SET | Toggle 14.7 psi |
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VALUE | View/Set |
PSI | Gas |
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{ | Pressure |
SHORT PRESS | |
values | LONG PRESS |
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Relay polarity:
= energize relay above trigger dewpoint
= energize relay below trigger dewpoint appropriate polarity selection in conjunction with proper wiring wll provide fail safe operation
Scroll through Alarm activity options
Fault reaction:
= faults do Not effect relays
= faults "look" like High dewpoint
= faults "look" like Low dewpoint 
= faults Flash the relay
Cancel Calibration (it is not performed)
When a third Alarm Relay is installed, |
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setup menu options will appear here |
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similar to Relays 1&2, but with both |
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the HI&LO legends active. This is |
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also the dewpoint alarm for units with |
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resetable |
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SET | few sec | SET | NUMBERS |
| Sensor | SET |
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Start |
| CALCULATING |
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Calibration |
| CALIBRATION | OK | Reading |
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see |
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| TOO LOW | Confirm | { | |
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| SpanCheck | ||
interface next page |
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Confirm SpanCheck |
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Viewing |
| SET | 1 sec |
| SET | SET |
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Serial- | go to |
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number |
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| 1 minute | { | |
| State |
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| Press together |
| New calibration |
| ignore error | ||
| to RESET the |
| values are saved |
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Legend: A slash '' in the display area, is used to depict two alternately shown (flashing back and forth) messages. denotes beeping. Buttons without designator or arrow leading out, perform no function
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