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XDT User’s Manual Appendices
38
Flow Diagram Operating State User Interface (continued) Manual & Scheduled Self Calibration
˚C
DEWPOINT
HI/LO
SET
SET
SET
SET
SET
SET
PSI
NUMBERS
CALCULATING
CALIBRATION
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
30 seconds anywhere (other than
"Calibration") without key press
appears when changing
settings of locked unit
Viewing Dewpoint
Start
Calibration
Viewing
Serial-
number
Power ON initialization
and sign on message
Flashing PSI indicates
pressure corrected
dewpoint
Flashing HI and/or LO
indicates corresponding
relays not energized
SET
SET
SET
SET
˚C
DEWPOINT
˚C
DEWPOINT
SET
˚C
DEWPOINT
˚C
DEWPOINT
{
values +/-0.1˚C
{
values +/-1hr.
{
timeout
timeout
cancel
cancel
abort performing Self Cal Now
disable Self Cal corrections
Scheduled Time Elapsed,
Entry Point
dew is stable
perform
Self Cal
During Self Cal the Analog output and Alarm Relays are frozen to their previous states
Self Cal
Completed go to
display Dewpoint
Confirm Entry into
Self Cal Menus
Set Scheduled Calibration
Interval in hours
0 (blank)=Scheduled SelfCal disabled,
but SelfCal corrections not affected
View Hours left until
next Scheduled
Calibration
The Self Cal Corrections
will not be used in dew
computations from now on,
until another Self Cal is
performed, manually or
scheduled. Schedules
are not affected.
Set Reference
Gas dewpoint
Begin Self Cal Now
Electric Valve Activation, and
15 min. time out for system stabilization,
performed only if
electric valve is installed.
Displays dewpoint being measured now.
Dewpoint stable testing,
0.5˚C for 3 min. Displays
dewpoint being measured now.
Electric Valve Deactivation, and final
Dewpoint stable testing, 0.5˚C for 3 min.
performed only if
electric valve is installed.
Displays dewpoint being measured now.
Confirm performing
Self Cal NOW
Appears only if
unit is equipped
with electric valve
{
units
Toggle Pressure Correction
SHORT PRESS
1/2 sec
{
{
Sensor
Reading
New calibration
values are saved
Cancel Calibration (it is not performed)
Confirm SpanCheck
Confirm
SpanCheck
again
1 minute
few sec
1 sec
OK
TOO LOW
Press together
to RESET the
instrument
go to
Set-Up
State
ignore error
When ALARM OPTIONS are installed menus appear here
Flow diagram items not related to Self Calibration are shaded in gray.