Cross Calibration Procedure For Mpd-Cb1 - Honeywell XNX Quick Start Manual

Note:
Sensors should be calibrated at concentrations representative of those to be
measured. It is always recommended that the sensor is calibrated with the target
gas it is to detect.
cAutIoN
Where the user calibrates any sensor using a different gas, responsibility for
identifying and recording calibration rests with the user. Refer to the local
regulations where appropriate.
6. Ensure that the sensor and the vicinity around it is clear all traces of the
calibration gas before continuing. This is to avoid triggering spurious
alarms. If calibration fails at any point, discard the cartridge and replace with a
new one.
7. Remove the test equipment, refit the weatherproof cap to the sensor (if
previously removed for the test) and return the system to normal operation.
6�1�6 Cross Calibration procedure for MPD-CB1
cAutIoN
Where the user calibrates any sensor using a different gas, responsibility for
identifying and recording calibration rests with the user. Refer to the local
regulations where appropriate.
When the MPD-CB1 Combustible LEL sensor is to be calibrated with a gas which is
different to the gas or vapor to be detected, the following cross calibration procedure
should be followed:
Note
• Table 1 lists the gases according to the reaction they produce at a given
detector.
• An eight star (8*) gas produces the highest output, while a one star (1*)
gas produces the lowest output. (These are not applicable at ppm levels.)
Gas Star Rating
Acetone
Ammonia
Benzene
Butanone
Butane
Butyl acetate
Butyl acrylate
Cyclohexane
Cyclohexanone
Diethyl ether
48
Gas
4* Ethane
7* Ethanol
3* Ethyl acetate
3* Ethylene
4* Heptane
1* Hexane
1* Hydrogen
3* Methane
<1* Methanol
4* MIBK
Table 1. Star Rating of Gases
Star Rating
6* Octane
5* Pentane
3* Propane
5* Propan-2-ol
3* Styrene
3* Tetra hydrafuran
6* Toluene
6* Triethylamine
5* Xylene
3*
XNX Universal Transmitter Quick Start Guide
Gas Star Rating
3*
3*
5*
4*
2*
4*
3*
3*
2*