Procedure; Bump Test; Health And Safety During Calibration - Kanomax Gasmaster 2750 User Manual

6.3.1. Procedure

1. Follow the initial set up instructions in section 6.1
2. Flow the target gas at 0.5 LPM
3. Measure the gas concentration on the monitor screen and wait for it to stabilise (10 minutes).
4. If the Kanomax sensor head requires a span adjustment then enter the CALIBRATE menu by
pressing the "mute" and "scroll down" buttons simultaneously for 2 seconds. Then select
SPAN CAL and change the GAIN using the scroll buttons. Calculate the new GAIN using the
equation below:
New GAIN = Old GAIN x Span Gas Concentration (ppm) / Sensor Reading
Note 1: Temp/RH GAINs are stored on the handheld rather than on sensor. All other GAINs are
stored on the sensors.
6.4.

Bump Test

Operators may wish to have increased confidence in the operation of their monitor by performing a
bump test prior to taking measurements.
A bump test involves quickly exposing the sensor to span gas and confirming the sensor indicates an
elevated response. The equipment for performing a bump test is the same as for performing a span
calibration, however it is not necessary to wait for the monitor to warm up before performing a bump
test, nor is it necessary to wait for the monitor readings to stabilize to confirm a successful bump test.
Turn on the monitor and place it at the outlet of the R42, you will need to wait three minutes before
readings will be displayed on the monitor. Turn on the span gas and observe the sensor reading, the
reading should quickly elevate above the baseline reading and approach that of the span gas
concentration. If the reading does not approach that of the span concentration this could indicate a
monitor fault or the need to perform a calibration. Once an elevated reading has been observed close
to the span gas concentration the gas can turned off, you must then wait for the readings to come
down to baseline level before taking measurements.
6.5.

Health and safety during calibration

Upmost care must be taken while performing a zero or span calibration. Cylinder gas can cause harm
in a number of ways. There a number of sources of good information about the correct use and
storage of compressed gases.
The following resources may prove useful:
The National Institute for Occupational Safety and Health
Kanomax Gasmaster User Guide
MRK-D-0002 V3
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