RKI Instruments Beacon 200 Rig Monitor, LEL/LEL - Manual (Page 38)

33 • Beacon 200 Rig Monitor Operator’s Manual
NOTE: The following procedure assumes that the target gas is present in
a high enough concentration to affect the fresh air (zero) reading.
If a fresh air environment can be verified, applying zero air to the
detector is not necessary when setting the zero reading.
This section describes how to calibrate the LEL detectors. It includes
procedures to prepare for calibration, set the fresh air reading, set the span
reading, and return to normal operation. It describes calibration using a
calibration kit that includes 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. The calibration cup is part
of the detector assembly in the Rig Monitor.
Preparing for Calibration
1. Simultaneously press and hold the ENTER and UP/YES buttons for
approximately 5 seconds to enter the Calibration Program. Release the
buttons when the CALIBRATION PROGRAM... message displays and
asks if you want to continue or return to normal operation.
Calibrate
Channel 1 Y/N?
Calibration
Timeout Selection
ENTER Normal Operation
Apply Gas to
Ch. 1 & Ch. 2
Detectors
Select Cal. Gas
Concentration for
Channel 2
Span
Channel 1 Y/N?
Span
Channel 2 Y/N?
Press Enter to
Adjust Span
Select Cal. Gas
Concentration for
Channel 1
Air Adjust Channel
1
Calibration
Program Enter
ENTER/ESCAPE
ESCAPE
Calibrate
Channel 2 Y/N?
Air Adjust Channel
2
Figure 10. Calibration Flow Chart