RKI Instruments 65-2485RK-02 - Manual (Page 22)

18 • 65-2485RK-02 Multi Point Detector
Setting the Response Reading
1. Screw the regulator into the calibration gas cylinder. Make sure the regulator is off. It
is off when the on/off knob is turned all the way clockwise.
NOTE: Ensure that you are using an appropriate calibration cylinder for the channel you
are calibrating.
2. Follow the directions in the controller operator’s manual for setting the response
reading (span).
3. When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it. Gas will begin to flow.
4. Allow gas to flow for 2 minutes before continuing with the directions.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Set the response reading according to the controller operator’s manual.
7. Unscrew the regulator from the cylinder.
Returning to Normal Operation
1. Unscrew the calibration cup from the detector.
NOTE: For convenience, leave regulator and calibration cup connected by the sample
tubing.
2. When the controller display reading falls below the alarm points, return the
controller to normal operation.
NOTE : If you do not allow the gas reading to decrease below the alarm points, then
unwanted alarms may occur.
3. Verify that the controller display reading decreases and stabilizes at 0 ppm.
4. Store the components of the calibration kit in a safe and convenient place.
Calibration, O
2
Detector
This section describes how to calibrate the oxygen detector on the multi-point detector. It
includes procedures to prepare for calibration, set the fresh air reading, set the zero
reading, and return to normal operation. It describes calibration 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. To properly calibrate the multi-point detector, you must
calibrate each connected detector. Perform the following procedure for the oxygen
detector.
WARNING: The controller is not an active gas monitoring device during the calibration
procedure.