- Select an installation location for the transmitter on the duct surface and drill a Ø 13 … 15 mm (0.51 … 0.59 in) hole for inserting the probe.
- Push the probe through the hole on the duct until the transmitter body meets the duct.
Attach the transmitter body to the duct with 2 Ø 3.5 mm (0.14 in) screws.
Check that the insulation ring sits tightly over the installation hole. If the duct has a negative pressure, external air can be drawn into the duct and affect the measurement if the installation hole is not sealed tightly.
- Optional: Drill a second hole for reference measurements approximately 30 cm (12 in) from the transmitter installation hole. See Figure 1.
- Open the 2 captive screws on the transmitter body and remove the lid.
- Attach the input/output wiring to the screw terminals on the transmitter component board. See Wiring. Tighten cable glands firmly after wiring.
- Check that the DIP switches and trimmers are in the correct position. See Transmitter Board for more information on DIP switches and trimmers.
- Close the transmitter lid and switch on the transmitter's power supply input.