RKI Instruments 65-2301RK - Manual (Page 17)

65-2300RK/65-2301RK Toxic Detector • 13
3. Screw the regulator into the zero air calibration cylinder.
4. Use the sample tubing to connect the regulator to the calibration cup. Make sure to
connect the tube to the inlet side of the calibration cup if using the 81-1138RK
calibration cup which is marked on the outside bottom to show the required flow
direction through the cup.
NOTE If you can verify that the toxic detector is in a fresh air environment, you do not
need to apply zero air to the detector before adjusting the fresh air reading.
5. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.
Setting the Zero (Fresh Air) Reading
1. Follow the instructions 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. Set the fresh air reading according to the controller operator’s manual.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a
different regulator for the zero air cylinder and toxic gas cylinder. If necessary to
fit the calibration toxic gas cylinder, change the regulator.
Setting the Response Reading (Span)
1. Screw the regulator into the calibration gas cylinder.
2. Follow the directions in the controller operator’s manual for setting the response
(span) reading.
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 the gas to flow to the detector for 2 minutes.
5. Set the response reading according to the controller operator’s manual.
6. After setting the response reading, turn the regulator’s on/off knob clockwise to turn
it off.
7. Unscrew the regulator from the cylinder and gently pull the calibration cup off of the
plug-in sensor.
NOTE: For convenience, leave the regulator and calibration cup connected by the
sample tubing.
8. Allow about 45 seconds for the gas reading to decrease below the alarm points and
then return the controller to normal operation.