Oldham 700 TP Series, Instruction Manual

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OLCT 700/710 TP
OLCT 700/710 TP Instruction Manual Rev. C.1 Page 17 of 45
Software Flowchart
dec
PGM1/2 (M)
mA Output XX.XX
Sensor Temp XX C
Voltage XX.X VDC
Resistance XXXXX
Sensor Life XXX%
Heater XXX mW
Serial ID XX
Heater X.XX VDC
PGM1/2 (3)
Setting Heater
Exit
PGM1 (3)
PGM1 (3)
PGM2 (3)
Version X.XX
AutoSpan @ XX
Range XXX ppm
Last Cal XX Days
inc
Auto Time-Out
View Sensor Status
PGM1/2 (3)
PGM1/2 (M)
Model Type
PGM2 (10)
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
Auto Time-Out
Set Heater Power
##
AutoTime-out
PGM1/2 (3)
PGM1/2 (M)
Set AutoSpan Level
Calibration Mode
(Auto Span)
Normal Operation
PGM1/2 (M) PGM1/2 (M)
Defaults Restored
LEGEND:
PGM1 - Program Switch Location #1
PGM2 - Program Switch Location #2
(S) - Momentary Swipe
(M) - Momentary hold of Magnet during text
scroll until the ">" appears, then release
(3) - 3 second hold from ">" prompt
(10) - 10 second hold from ">" prompt
Auto Time-out - 5 seconds
inc - Increase
dec - Decrease
#, ##, ### - numeric values
PGM2 (10)
PGM1/2 (3)
Simulation
PGM1/2 (3)
Auto Time-Out
Restore Defaults
Auto Time-Out
Auto Time-Out
Auto Time-Out
Signal Output Check
inc
PGM1/2 (3)
PGM1 (S)
PGM2 (S)
##
PGM1/2 (3)
PGM1/2 (M)
Set Range
dec
inc
PGM2 (S)
PGM1/2 (3)
PGM1 (S)
##
dec
PGM1/2 (3)
PGM1/2 (M)
Set Serial ID
Figure 11: OLCT 700/710 TP Software Flowchart
3.3 Normal Operation
In normal operation, the OLCT 700/710 Display continuously shows the current detector reading, which
will normally appear as “0”. Once every minute, the LED display will flash the detector’s units of measure
and the gas type (i.e. ppm H
2
S). If the detector is actively experiencing any diagnostic faults, a “Fault
Detected” message will scroll across the display once every minute instead of the units of measure and the
gas type. At any time, while the detector is in “Fault Detected” mode, PGM1 or PGM2 can be swiped to
prompt the detector to display a list of the active faults.
In normal operation, the 4-20mA current output linearity corresponds with the full-scale range. The RS-
485 Modbus™ serial output provides the current gas reading and complete fault status on a continuous
basis when polled by the master device.
3.4 Calibration Mode (AutoSpan)
Calibration Mode allows for sensor span calibration. Span calibration should be performed on a routine
basis (quarterly minimum) to ensure reliable performance. If a sensor has been exposed to any de-
sensitizing gases or to very high over-range H
2
S levels, then a re-calibration should be considered. Unless
otherwise specified, span adjustment is recommended at 25ppm for the 0-100 and 0-50ppm ranges (and