RKI Instruments 65-2481RK - Manual (Page 18)

14 • 65-2481RK Multi Point Detector
9. Connect the cable’s drain wire to an available chassis ground at the controller. RKI
controllers typically have a ground stud that can be used to ground the cable’s drain
wire.
Start Up
This section describes procedures to start up the multi-point 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 multi-point 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 a target gas in the monitoring environment, use the
calibration kit and a zero air calibration cylinder to introduce “fresh air” to the
desired detector and verify an accurate zero setting. See “Calibration, LEL, H
2
S, and
CO Detectors” on page 23 or “Calibration, O
2
Detector” on page 25 for instructions
to introduce zero air to the desired detector.
1. Verify that the detector is in a fresh air environment (environment known to be free of
toxic and combustible gases, and of normal oxygen content, 20.9%).
2. At the controller, verify a reading of:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for CO or H
2
S
If the display reading is the appropriate fresh air reading, start up is complete. The
detector is in normal operation. If the display reading is not the appropriate fresh air
reading, continue with step 3.
3. Perform a zeroing operation at the controller. See the controller operator’s manual for
directions.