RKI Instruments 61-1001RK-05 - Manual (Page 13)

61-1001RK-05 Combustible Gas Detector• 9
hub or junction box conduit hub, then screw the mounting threads of the detector into
the hub. If necessary for environmental conditions, apply thread sealant or teflon tape
to the hub and/or detector threads to seal them.
7. If the detector is installed directly on a controller, connect the detector leads to the
appropriate detector terminal strip terminals. See Figure 3 for wiring to a generic
controller. See the controller operator’s manual and the controller’s detector head
specification sheet for the NC-6205-05 detector for wiring specific to your controller.
If the detector is installed remotely from a controller in a junction box, connect the
detector leads to the terminal block the same way the old detector was wired (see
Figure 3). See the controller operator’s manual and the controller’s detector head
specification sheet for the 61-1001RK-05 detector to verify the connections to the
controller are correct.
8. If the detector is installed remotely from a controller in a junction box, reinstall the
junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
11. Calibrate the replacement detector as described in the Calibration section of this
manual.
Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a
calibration frequency of every 3 to 6 months is adequate for most hydrogen detector
applications. Unless experience in a particular application dictates otherwise, RKI
Instruments, Inc. recommends a calibration frequency of every 3 months.
If an application is not very demanding, for example detection in a clean, temperature
controlled environment where hydrogen is not normally present and calibration
adjustments are minimal at calibration, then a calibration frequency of every 6 months is
adequate.
If an application is very demanding, for example if hydrogen is present often and in
significant concentrations or the environment is not well controlled, then more frequent
calibration than every 3 months may be necessary. If potential catalyst poisons are known
or likely to be present, more frequent calibration than every 3 months will be necessary.
Calibration
This section describes how to calibrate the hydrogen detector. It includes procedures to
prepare for calibration, set the zero reading, set the response reading, and return to
normal operation.
WARNING: The controller is not an active gas monitoring device during the calibration
procedure.