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6 OPERATION
6.1 Instrument Start-up
Ensure all electrical connections have been made correctly and switch on.
6.2 Operating Page
The Operating Page is a general use page in which parameters are viewed only and cannot be altered. To alter or program a
parameter refer to the programming pages in Section 7.
XX.X
% Oxygen
XX.X
Alarm Setpoint
-----
OXYGEN CAL. SEQ.
6.2.1
Operating Page Error Messages
The following error messages only appear in the
Note. Relay 2 is assigned as a malfunction alarm and de-energizes when an error condition is present. The l.e.d.
assigned to this relay is illuminated when in an error condition.
Error Message
NV MEMORY ERROR
CELL UNDER TEMP.
OVER TEMP. TRIP
OUT OF LIMITS
14
% Oxygen
The upper display indicated the measured oxygen value. If over or under
temperature is monitored, the upper display shows '– – – – –' and an error
message is displayed on the lower dot matrix display – see Table 6.1.
Alarm Set Point
The upper display indicates the alarm set point, displayed as % oxygen. The
set point value and the relay/l.e.d. action can be programmed in the
Outputs Page
Advance to
Note. Electrical calibration is carried out prior to despatch and should not
be altered. However, if inaccurate or inconsistent readings are obtained, refer
to the Electrical Calibration Supplement for full calibration procedures.
Operating Page
Possible Cause
The contents of the non-volatile memory have not been read correctly during power up. To rectify the fault,
switch off, wait 10 seconds and switch on again. If the fault persists contact the Manufacturer.
The temperature at the probe sensor has not reached a sufficient temperature to obtain suitable readings (less
than 670°C at the control thermocouple).
The temperature at the probe sensor has exceeded the maximum permissible temperature (greater than
750°C) and has now switched the power to the heater off. Refer to EXFG Interface Electronics Unit Guide and
EXFG Probe Guide.
The Interface Electronics Unit is switched off or mains power to the Interface Electronics Unit has failed.
The measured % oxygen value is outside the limits of the instrument. (The upper display flashes if outside the
limits of 0.25% to 25%).
Table 6.1 Error Messages
– see Section 7.2.
Oxygen Calibration Sequence
(when an error has been detected), in place of the % oxygen frame.
page.
Set Up
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