Setting Up The Transmitter - Teledyne 9060 Operating Instructions Manual

factors are found to be have been changed more than expected, an 'ADC Warning' alarm
is generated. If a large error occurs due to an electronic fault then an 'ADC CAL FAIL'
alarm will occur.
A one-off calibration procedure of the precision reference sources should never need
to be repeated for the instrument life unless the instrument has been repaired. For a
description of the calibration procedure, refer to 'Setting Up The transmitter' Section 5.5,
items 7, 8 9 and 10.
The digital to analog converters or output section of the transmitter are tested for
accuracy when the 'AUTOCAL' button is pressed, and when the transmitter goes through
the start up procedure. If the output calibration factors are found to have changed more
than expected, the 'DAC Warning' alarm will occur. If either output has a fault, the 'DAC
CAL FAIL' alarm will occur. The D/A sections are re-calibrated by pressing the 'AUTO
CAL' button on the keyboard while in 'SET-UP' mode. Each of the output channels have
three menu items which provide manual calibration (set-up 13 to 18). If manual is selected
in set-up 13 or 16, the 'AUTO CAL' will be skipped and the manual calibration factors will
be retained. See section 5.5 set-up 13, and section 6.3 for more details.
All output signals will drop to 0 mA for one-second period. It is suggested that a D/A
re-calibration be performed after the instrument has stabilised, approximately 30 minutes
after first switching on and after Setting Up The transmitter Section 5.5, items 6, 7, 8 and 9
have been completed, and then annually.
2.9 MANUAL CALIBRATION - PROBES
Calibration of the probe generally only requires the Sensor Offset to be set. See
Section 5.5.11 for more details. If the offset for a sensor is not set the error will generally
be less than 5% of the actual oxygen reading. By setting the offset the error will be less
than 1% of the oxygen actual reading.
If a probe made by a manufacturer other than Teledyne Controls is used on the
Teledyne transmitter, and/or improved accuracy is required at process levels of oxygen
(well away from 20.9%) the "Low Oxygen Calibration" trim factors can be entered. (See
also Section 5.5.90)
To manually set the "Low Oxygen Calibration" first set the Sensor Offset, then the "Low
Oxygen Calibration".
1. To check a probe offset on site, the probe must be sensing air, with reference air,
and allowed to settle at the probe operating temperature for 30 minutes. Read the
offset in 'RUN' mode in millivolts on the lower line. Offset errors can occur if the
sensor does not have some air passing over it. A gentle flow (<0.5 l/min) of air in
the calibration check port can be provided by a reference air pump or similar. The
best results will be obtained if the probe is removed from the process. For heated
probes, if the combustion appliance is not operational and the probe heater is
interlocked with the 'BURNER ON' signal, the 'BURNER BYPASS' switch should be
set to 'ON to power the probe heater after removing the probe from the flue.
9060-Zirconia Analyser