Teledyne 9060L - Zirconium oxide flue gas oxygen analyzer - Manual (Page 38)

Operation Model 9060L
Teledyne Analytical Instruments 38
Within the time the temperature is being displayed, one can use the
UP and DOWN arrow keys to adjust the temperature, thus recalibrating
the temperature readout.
WARNING: TEMPERATURE READING IS CALIBRATED AT THE
FACTORY. DO NOT ATTEMPT RECALIBRATION OF
THE PROBE TEMPERATURE. ERROR OF A FEW
DEGREES WOULD HAVE LITTLE IMPACT ON THE
OXYGEN CALCULATIONS, BUT IF THE PROBE IS
GROSSLY MISCALIBRATED IT WILL HAVE AN
ADVERSE EFFECT ON THE OXYGEN READOUT.
ONLY QUALIFIED PERSONNEL SHOULD RE-
CALIBRATE TEMPERATURE.
4.8.1 Low Temperature
For the zirconia sensor to operate properly the temperature of the
probe must be above 650 degrees Centigrade. While the temperature is
below this threshold, the red LED alternates showing “t-Lo” and the
oxygen concentration.
4.8.2 Open Thermocouple
The electronics checks if the thermocouple (TC) is open. If it
detects that the TC is open the Sensor failure contacts will go into
alarming position. Red LED display may alternate between oxygen
concentration and the error code “-02-”. Refer to Section 4.9 for
information on Error Codes.
4.9 Error Messages
The instrument will display an error code when it detects a
malfunction or error condition. The possible codes and common causes
are listed below:
-01- This message indicates that there is possible failure on the
Analog to Digital Converter, ADC. This may happen when the
micro-controller cannot communicate with the ADC. In this
state, the oxygen reading is unreliable.
-02- This message is displayed when the input voltage to the ADC
rises above the upper limit of the ADC. This could occur if the
probe is exposed to zero oxygen concentration, making the