ENMET QUADRANT - Manual (Page 16)

ENMET Corporation QUADRANT
10
4.0 Field Test the QUADRANT
To field test the QUADRANT, enter the operation menu, which is the scrolling display of
the gas measurements. Assure the correct field test gas is available, connect the
calibration adapter to the cylinder of gas and the QUADRANT calibration cover. Attach
calibration cover to instrument (aligning notch in cover with horn opening) and open
valve so gas flows gently over sensors. Apply gas for about two minutes, if instrument
goes into alarm in all channels which are turned on and gas supplied, it passes the field
test.
If instrument fails to go into alarm in any of the channels which are turned on and
gas supplied the instrument must be calibrated before use.
Note that if ENMET field test gas P/N 03299-000 is used, the H
2
S channel is not tested.
5.0 Maintenance
5.0.1 Scheduling QUADRANT Maintenance
It is recommended that all channels of a QUADRANT instrument be completely
recalibrated at least ever ninety days, utilizing the procedures given in this manual.
The sensor responses of an instrument should be checked at least every thirty days,
by exposing the sensors to appropriate gases and monitoring for expected instrument
response. Good practice dictates more frequent checking and calibration under
particularly dangerous conditions, conditions of heavy usage, and when the
electrochemical gas sensors are nearing the end of their useful lives. Some
instrument users check sensor responses at the beginning of every period of usage,
such as every shift. National, state, local, or company specifications may dictate
minimum calibration intervals. Check flammable sensor response after exposure to
more than 100% LEL of any flammable gas, and check electrochemical sensor
response after exposure to massive quantities of gas, such as 1000 ppm CO or 200
ppm H
2
S.
5.0.2 Maintenance Menu Entry
To enter the maintenance section use the preset password. The factory default password,
with which the instrument is shipped, is 1270. If this has been changed, per section 5.6,
use the correct password.
5.1 Auto-Zero
After instrument has been on for 10 minutes Auto-Zero or Auto-set is able to be done
from the maintenance section (see maintenance menu flow chart on page 3). This should
only be performed in a fresh-air environment!!