Oldham OLCT 80 User Manual page 33

Menu Description
ON Turn the main sensor on or off.
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PRINCIPAL Display: display the reading from the main sensor.
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Primary: display the reading from the main sensor and go to the
4-20 mA menu (see step below).
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Secondary: the reading is not displayed.
Note: if multiple sensors (main sensor, ANA1 sensor or ANA2
sensor) are configured as the Primary, the -4-20 mA output will use
the current corresponding to the Main sensor.
4-20 mA Define the output current type (see the Note on the 4-20 mA current
type on page 27).
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Normal: standard 4-20 mA signal.
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Combined: signal uses predefined values representing the alarm
statuses of the 3 sensors. This option is automatically selected if
the Secondary option was defined in the previous step.
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CAPEX: all-or-nothing signal indicating normal operation or a fault
condition.
Coef none Defines the reading integration time (none, 5 seconds, 30 seconds,
1 minute, 2, 5, 10 or 15 minutes). The reading will be averaged over
the given period.
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Ovr Lock Yes: verification is activated. If the device detects a gas
concentration above 100% LEL, it will display the word "Sup." The
reading is blocked and the output signal is fixed at 23.2 mA. The
verification request is acknowledged using the infrared remote
control. See the section on Verification on page 71.
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No: verification is not activated.
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Sure ?? ENTER: confirm the changes made.
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ESC: cancel the changes made and return to the PROG menu.
Note on the 4-20 mA current type
Normal mode
0 mA signal:
1 mA signal:
2 mA signal:
Signal from 4-20 mA: reading from the main channel (Menu > PROG).
Signal greater than 20 mA: line fault, out-of-range, verification.
Combined mode
1 mA : 1 faulty sensor.
2 mA : in stabilization or calibration.
4 mA : no fault and no alarm
8 mA : 1 sensor out of 3 in alarm #1
12 mA : 2 sensors out of 3 in alarm #1
16 mA : 3 sensors in alarm #1.
19 mA : 1 sensor out of 3 in alarm #2
22 mA : 1 sensor out-of-range or to be verified.
Note: an alarm always takes priority over a fault, unless the alarm is
generated by the faulty channel.
CAPEX function
Comprises 2 statuses: Good or Bad.
0.1 mA : in fault, alarm, calibration or stabilization.
20 mA : no fault and no alarm
no power.
fault code.
in calibration.
3 – Menus
27