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OLCT 200 User Manual |
45
Backup Config.
allows users to store the entire current OLCT 200 menu database
into non-volatile memory for restoration later if incorrect values are accidentally entered
or uploaded.
Restore Config
.
restores the OLCT 200 menu database to the values from the
most recent Backup Config. This menu item is only available if a smart sensor is not
installed. The special keystroke sequence of 4 consecutive UP keys is also required to
perform backup and restore operations.
Upload Sensor Data
allows manually uploading the entire smart sensor database
to the OLCT 200 from the smart sensor.
Cal Marker (wired models only)
allows setting the 4-20mA output value
during ZERO and SPAN calibrations at a level to prevent alarm trips by calibration
values. 3-Wire models may be set from 0 to 20mA. Quiescent current of 2-wire
models limits this setting to 3 to 20mA.
TX Sensor Life (wired models only)
set for YES, causes the OLCT 200 4-
20mA output to transmit a sensor life value after successful calibrations during the CAL
PURGE delay (see section 4.1). Normal operation is the OLCT 200 transmits 4mA
during the CAL PURGE delay. But with
TX Sensor Life
=
YES
it transmits 4mA for the
first 10-seconds, then for 5-seconds transmits a value between 4mA and 5mA, with
4mA equal to 0% sensor life and 5mA equal to 100% sensor life (see Figure 5-5). The
output then returns to 4mA for the remainder of the CAL PURGE delay. For example,
if after a calibration sensor life is 75%, the OLCT 200 transmits 4.75mA during the 5-
second interval.
Note:
TX Sensor Life
should always be set for NO unless the 4-20mA receiver is
capable of interpreting the sensor life signal. The Oldham WX16 Controller is capable
of this function.
Figure 5-5: Transmit Sensor Life Timing Diagram
Summary of Contents for OLCT 200
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Page 14: ...OLCT 200 User Manual 14 Figure 2 3a Outline Drawing OLCT 200 Wired Models...
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Page 38: ...OLCT 200 User Manual 38 Figure 4 1 Calibration Gas Input...
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