Teledyne 9060 - Zirconium oxide flue gas oxygen analyzer - Manual (Page 71)

9060-Zirconia Analyser
71
71
92. Gas Calibration / Checking
The Teledyne oxygen sensor is an extremely stable sensor. However if it is required to
make a fine adjustment to the sensor offset voltage or the scaling at a specific oxygen
concentration, this can be done using this function.
If Check is selected, the set-up steps 53 to 69 operate as described on the previous
pages.
During the automatic gas calibration a mid gas calibration factor is saved in the next
function, set-up 93 (and 94).
If Calibrate is selected, there will be addition options in set-up #53 and 57.
Options:
Calibrate
Check *
93. Oxygen Mid Point Calibration factor 1
During the automatic gas calibration described in set-up 92, a mid gas calibration factor is
calculated and saved in this function for probe #1. This factor is limited to less that 0.5%
oxygen if the calibration gas (set in set-up 58 and 64) is above 2.0% or 0.2% if the
calibration gas is below 2.0% oxygen.
Range
-0.5 to +0.5% oxygen. Default setting is 0.0%.
94. Oxygen Mid Point Calibration factor 2
This factor is used in the same way Mid Point Calibration Factor #1 but is used for probe
#2 if it is fitted.
95. Enable 4-20 Limit
The zirconia oxygen sensor will not give a valid reading when it is below 650
°C. So that
an invalid sensor signal is not used when the sensor is below 650
°C the output 4-20mA
channels are taken to 0mA.
If the output channels are required to reflect the oxygen reading even if the sensor is
below 650
°C, this option should be set to NO.
Options:
Yes *
No
96. SSR Fail Alarm loops
The 9060 Analyser monitors the solid state relays that are used to control the heater in the
probe. If the SSR fails the probe temperature will loops between 680°C and 800°C. When
these variations are detected, the transmitter raise a “SSR Fail” alarm and turn of the
heaters when the number of loops exceeds the number set in this function.
A faulty SSR may be bypassed by using the SSR for the second probe or the gas
solenoids if these is not being used. See set-up 99 for more information.
Range
0 (Disabled) to 9. Default setting is 3.