RKI Instruments 65-2510RK - Manual (Page 12)

8 • 65-2502RK/65-2510RK Oxygen Detector
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 2 for wiring to a generic
controller. See the controller operator’s manual and the controller’s detector head
specification sheet for the 65-2510RK 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 2). See the controller operator’s manual and the controller’s detector head
specification sheet for the 65-2502RK 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 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 months is adequate for most oxygen detector
applications. Unless experience in a particular application dictates otherwise, RKI
Instruments, Inc. recommends a calibration frequency of every 3 months for the oxygen
detector.
If an application is not very demanding, for example detection in a clean, temperature
controlled environment, and calibration adjustments are minimal at calibration, then a
calibration frequency of every 6 months is adequate.
If the application is very demanding, for example if the environment is not well
controlled, then more frequent calibration than every 3 months may be necessary.
Calibration
This section describes how to calibrate the oxygen detector. It includes procedures to
assemble the calibration kit, set the fresh air reading, set the zero reading and return to
normal operation. It describes the test using a calibration kit that includes a calibration
cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. RKI
Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator.
Preparing for Calibration
NOTE: Calibrating the oxygen detector may cause alarms. Be sure to put the controller
into its calibration program or disable external alarms before calibrating.