OLCT 700/710 TP
OLCT 700/710 TP Instruction Manual
Rev. C.1
Page 19 of 45
Assuming acceptable sensor signal change, after 3 minutes the reading will auto-adjust to the programmed
AutoSpan level. During the next 30 seconds, the AutoSpan sequence checks the sensor for acceptable
reading stability. If the sensor fails the stability check, the reading is re-adjusted back to the AutoSpan
level and the cycle repeats until the stability check is passed. Up to three additional 30-second stability
check periods are allowed before the detector reports a “Stability Fault” twice and the OLCT 700/710 will
return to normal operation, aborting the AutoSpan sequence. The detector will continue to report a
“Stability Fault” and will not clear the fault until a successful AutoSpan is completed.
If the sensor passes the stability check, the OLCT 700/710 reports a series of messages:
“
AutoSpan Complete
”
“
Sensor Life XXX%
”
“
Remove Span Gas
”
d)
Remove the span gas and calibration adapter, or the optional gas ampoule or gas generator calibration
technique components when AutoSpan cycle is complete. The OLCT 700/710 will report a live
reading as it clears toward “0”. When the reading clears below 5ppm, the detector will display “Span
Complete” and will revert to normal operation. If the sensor fails to clear to less than 5ppm within 5
minutes, a “Clearing Fault” will be reported twice and the detector will return to normal operation,
aborting the AutoSpan sequence. The OLCT 700/710 will continue to report a “Clearing Fault” and
will not clear the fault until a successful AutoSpan is completed.
e)
AutoSpan calibration is complete.
NOTE 1
: If the sensor fails the minimum signal change criteria, a
“Range Fault”
will be
declared and a “Fault Detected” message will be displayed alternately with the detector’s
current reading. The 4-20mA output will be taken to 0mA and the “Range Fault” fault bit will
be set on the Modbus™ output.
NOTE 2
: If the sensor fails the stability criteria, a
“Stability Fault”
will be declared and a
“Fault Detected” message will be displayed alternately with the detector’s current reading. The
4-20mA output will be taken to 0mA and the “Stability Fault” fault bit will be set on the
Modbus™ output.
NOTE 3
: If the sensor fails the clearing time criteria, a “
Clearing Fault
” will be declared and a
“
Fault Detected” message will be displayed alternately with the detector’s current reading. The
4-20mA output will be taken to 0mA and the “Clearing Fault” fault bit will be set on the
Modbus™ output.
NOTE 4
: The most common cause of “
Range Fault
” and “
Stability Fault
” is the improper
storage of the unit / sensor. When the detector power is removed for any period of time, the
sensor cell should be protected with a Desiccant Pack (PN DET-960-240010-000) and covered
by the Dust Cap (PN DET-600-003232-000)
3.5
Program Mode
Program Mode provides a “View Sensor Status” menu to check operational and configuration parameters.
Program Mode provides for adjustment of the AutoSpan Level, Sensor Range, Heater Power, and Serial
ID. Additionally, Program Mode includes the diagnostic function “Signal Output Check” and “Restore
Factory Defaults”.
The Program Mode menu items appear in the order presented below:
View Sensor Status
Set AutoSpan Level
Summary of Contents for 700 TP Series
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