RKI Instruments 65-2481RK User Manual
Page 28
24 • 65-2481RK Multi Point Detector
Setting the Zero Reading
1.
Follow the directions in the controller operator’s manual for setting the zero reading.
2.
When the instructions call for applying zero air to the detector, turn the regulator’s
on/off knob counterclockwise to open it. Gas will begin to flow.
3.
Allow the gas to flow for two minutes.
4.
Turn the regulator’s on/off knob clockwise to close it.
5.
Set the zero reading according to the controller operator’s manual.
6.
Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
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 %LEL for combustible gas
•
0 ppm for CO or H
2
S
4.
Store the components of the calibration kit in a safe and convenient place.