Instruction manual

SM425 INSTRUCTION MANUAL 3.0 INSTALLATION
- The outside dimension of detector may vary depending on its options. Use a pipe that is large enough
for the detector. Refer to Figure 3-1 for the correct dimensions.
- If the detector is mounted horizontally, the calibration gas inlet and reference gas inlet should face
downwards.
- When using the detector with pressure compensation, ensure the flange gasket does not block the
reference air outlet on the detector flange. (If the flange gasket blocks the outlet the detector cannot
conduct pressure compensation.) Where necessary, make a notch in the flange gasket. Confirm the
external dimensions of the detector in Section 1.17 before installation.
- The sensor (zirconia cell) must be kept dry and protected from water droplets.
1. Do not mount the probe with the tip higher than the probe base.
2. If the probe length is 2.5 meters or more, the detector should be mounted vertically (no more than
a 5° tilt).
3. The detector probe should be mounted at right angles to the measurement gas flow or the probe
tip should point downstream.
Figure 3-1 illustrates an example of the probe insertion port.
Figure 3-1 Example of forming probe insertion port
42 42500001 REV A