12 • 65-2427-05-01 H
2
S Detector
Start Up
This section describes procedures to start up the H
2
S detector and place the detector into
normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the controller
operator’s manual.
3. Turn on power to the controller.
4. Turn on the controller.
5. Verify that the controller is on and operating properly. Refer to the controller operator’s
manual.
CAUTION:
Allow the detector to warm up for 5 minutes before you continue with the next
section, “Setting the Zero (Fresh Air) Reading”.
Setting the Zero (Fresh Air) Reading
WARNING: If the detector installation is explosion proof, do not remove the detector
housing cap or junction box cover while the circuits are energized unless the
area is determined to be non-hazardous. Keep the detector housing cap and
junction box cover tightly closed during operation.
CAUTION:
If you suspect the presence of H
2
S in the monitoring environment, use the
calibration kit and a zero air calibration cylinder to introduce “fresh air” to the
H
2
S detector and verify an accurate zero setting. See “Calibration” on page 16
for instructions to introduce zero air to the H
2
S detector.
1. Verify that the detector is in a fresh air environment (environment known to be free of
hydrogen sulfide, other toxic and combustible gases, and of normal oxygen content,
20.9%).
2. Verify a reading of 0 ppm H
2
S at the controller.
If the display reading is 0 ppm H
2
S, start up is complete. The detector is in normal
operation. If the display reading is not 0 ppm H
2
S, continue with step 3.
3. Perform a zeroing operation at the controller. See the controller operator’s manual for
directions.
