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4. I
C
NSTALLATION AND
OMMISSIONING
4.1 Mounting the Transmitter
Surface mount the transmitter case on to a flat surface or bracket, using the four mounting brackets
provided. The transmitter should never be mounted so that it is directly expose to the sun or rain. Always
leave at least 10cm of clearance around the four sides of the case.
Make sure the temperature of the case is below 55C, and that the radiated heat from furnaces and boilers is
kept to a minimum. There should be adequate ventilation to maintain ambient temperature.
Install the cables through cable glands. There are 4 holes cut in the base of the transmitter case; 2x 17mm
& 2x 21mm. Use a sharp knife to cut away the covering film for only the glands that are needed.
NOTE: ALWAYS LEAVE THE UNUSED GLAND HOLES SEALED.
Ensure that the electrical connection complies with the local electrical requirements. (see chapter 4.6
Electrical Connections)
110mm
315mm
355mm
275mm
Case Mounting Dimensions
4.2 Installing a 1231 Oxygen Probe
Weld a BSP or NPT socket to the flue in a suitable position for flue gas sensing. For the correct size of
socket refer to probe data in Chapter 3.1.2 Series 1230 Probes Specifications. The closer to the source of
combustion the smaller will be sensing lag time, allowing better control.
The probe has a typical response time of less than four seconds, so most of the delay time is normally the
transit time of the gas from the point of combustion to the point of sensing.
Probes can be mounted at any angle. However, if the probe is to be mounted on a vertical duct wall, it is
better to angle the probe (approx. 15°) down to avoid process condensation inside the cold end of the probe.
If there are any particulates in the flue gas, a filter can be omitted by pointing the probe vertically downwards.
Otherwise the transmitter can be configured to automatically purge the filters, or they can be replaced
periodically.
August 2018
Technical Manual
1732 Oxygen Transmitter
15
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