Calibration, esm-01 toxic detector – RKI Instruments 65-2484RK User Manual
Page 37
65-2484RK Multi Point Detector • 33
6.
Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
Setting the Zero Reading
1.
Screw the regulator into the 100% nitrogen calibration gas cylinder. Make sure the
regulator is off. It is off when the on/off knob is turned all the way clockwise.
2.
Follow the directions in the controller operator’s manual for setting the zero 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 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 zero 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 oxygen detector.
NOTE:
For convenience, leave the regulator and calibration cup connected by the
sample tubing.
2.
When the controller display reading rises above the alarm points, return the controller
to normal operation.
NOTE
: If you do not allow the gas reading to rise above the alarm points, then unwanted
alarms may occur.
3.
Verify that the controller display reading increases and stabilizes at 20.9% oxygen.
4.
Store the components of the calibration kit in a safe and convenient place.
Calibration, ESM-01 Toxic Detector
This section describes how to calibrate the ESM-01 type toxic detector. It includes
procedures to prepare for calibration, set the fresh air reading, set the response reading,
and return to normal operation. It describes calibration using a calibration kit that
includes an 81-1138RK-XX calibration cup, calibration gas, sample tubing, and a fixed
flow regulator with an on/off knob. The required sample flow rate and calibration cup
depend on the detector being calibrated. Table 3 below lists the required calibration cups
and regulators for the various toxic detectors.
Table 3: Required Calibration Cups and Flow Rates
Detector Type
Required
Calibration Cup
Required Regulator/
Flowrate for Calibration
Gas
Flow Direction
Specified on
Calibration Cup
Arsine (AsH
3
)
81-1138RK
81-1051RK, 0.5 LPM (liters
per minute)
Yes
Chlorine (Cl
2
)
81-1138RK-CL2
81-1051RK, 0.5 LPM
No
Hydrogen Cyanide (HCN)
81-1138RK
81-1051RK, 0.5 LPM
Yes