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10.1.3 Probe Calibration
There is only one calibration factor for the calibration of the oxygen probe. This is the sensor offset, and it is
written on a tag attached to every probe.
Use the F
buttons to navigate to Setup Menu #01 (or Setup Menu #02 for probe 2) and then use the
UNCTION
O
buttons to set the value to the value written on the tag. If in doubt the best option is to set the offset
PTION
to 0.0mV as this will only produce an error of around 0.1% oxygen in a combustion application for a 1mV
error in the offset value.
For information on checking the probe and transmitter system with a certified gas see chapter 11. Gas
Calibration Check and Purge.
10.2 Cold Start
The purpose of the Cold Start function is to return all of the configuration on the transmitter back to the
factory default values. There are several reasons why a Cold Start may be necessary
1. After a firmware upgrade, if the update requires changes to the menu functions then the transmitter
will automatically perform a Cold Start.
2. The transmitter will automatically force a Cold Start when the power is turned on and the
configuration / calibration factors are found to be corrupted. The device configuration and device
calibration are stored in separate blocks of memory and the device can detect corruption and factory
reset one or both parts as necessary.
3. A Cold Start can be manually performed if the operator wants to reset the transmitter back to the
default factory configuration. See chapter 10.2.1; Forcing a Cold Start.
4. Resetting the calibration factors back to the default values. See chapter 10.2.2; Resetting the
Calibration Factors.
10.2.1 Forcing a Cold Start
The cold start can be initiated by following these steps:
1. Turn the transmitter power off.
2. Use a fine point or screw driver to set the DIP switch SW1-1 on the 1730 main PCB to ON. The
switch is at the bottom of the 1730-1 PCB, accessible through the window in the shield.
3. Turn the transmitter back on.
4. You will be prompted to select 'Reset' or 'Cancel' to the prompt 'Reset Calibration Data?'. Press the
button to reset the calibration factors and the configuration data or the A
D
ISPLAY
only reset the configuration of the transmitter.
5. Turn off the Cold Start switch when prompted by 'Turn off C/Start Switch'.
If the calibration factors have been reset, follow the instructions in chapter 10.1 to recalibrate the transmitter.
If only the configuration has been reset it is also important to check items that will affect the transmitter
outputs, number of probes, the serial communications, the solenoid configuration and other items.
10.2.2 Resetting the Calibration Factors
If it is required to reset the calibration factors, follow the instructions in the previous section and select 'Reset'
when prompted to 'Reset Calibration Data?'.
Technical Manual
56
button to
LARM
August 2018
1732 Oxygen Transmitter
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