XDT User’s Manual Appendices
Flow Diagram Operating State User Interface (continued) Manual & Scheduled Self Calibration
Flow diagram items not related to Self Calibration are shaded in gray.
Power ON initialization | 30 seconds anywhere (other than | appears when changing |
and sign on message | "Calibration") without key press | settings of locked unit |
Flashing HI and/or LO indicates corresponding relays not energized
Start | Calibration |
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| Toggle Pressure Correction |
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HI/LO | ˚C |
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| Viewing Dewpoint |
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DEWPOINT | PSI |
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{ | pressure corrected |
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dewpoint | SHORT PRESS |
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| Confirm Entry into |
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| Self Cal Menus |
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cancel |
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appear |
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| SET | Set Reference |
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| DEWPOINT | Gas dewpoint |
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| SET | Set Scheduled Calibration |
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| Interval in hours |
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| next Scheduled |
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| { | 0 (blank)=Scheduled SelfCal disabled, |
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| Calibration |
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| but SelfCal corrections not affected |
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| SET |
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| Begin Self Cal Now |
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OPTIONS |
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| disable Self Cal corrections |
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cancel |
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| until another Self Cal is | |||||
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| performed, manually or | ||
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| Confirm performing |
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ALARMWhen |
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| Self Cal NOW |
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| CalSelf togoCompleted Dewpointdisplay |
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| Scheduled Time Elapsed, |
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| Entry Point |
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| During Self Cal the Analog output and Alarm Relays are frozen to their previous states |
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| ˚C | dew is stable | ˚C |
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| DEWPOINT |
| DEWPOINT | DEWPOINT |
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| Self Cal |
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| Electric Valve Activation, and | Dewpoint stable testing, | Electric Valve Deactivation, and final | ||||||
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| 15 min. time out for system stabilization, | 0.5˚C for 3 min. Displays | Dewpoint stable testing, 0.5˚C for 3 min. | ||||||
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| performed only if electric valve is installed. | dewpoint being measured now. performed only if electric valve is installed. | |||||||
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| Displays dewpoint being measured now. |
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| Displays dewpoint being measured now. | |||||
SET |
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| few sec | SET NUMBERS |
| Sensor | SET |
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| CALCULATING |
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| CALIBRATION | OK | Reading |
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| SpanCheck |
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| again |
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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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| 1 minute |
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| Press together | New calibration |
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| to RESET the | values are saved |
| ignore error |
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instrument
Cancel Calibration (it is not performed)
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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