Rae QRAE PLUS PGM-2000, Руководство по эксплуатации и техническому обслуживанию

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PROGRAMMING
4-21
measured value of the LEL sensor into equivalent concentration
of the pentane gas.
Note 1 : Using the correction factor provides an estimate the
target measurement gas. For greatest accuracy, it is necessary
to calibrate the LEL sensor directly with the target gas.
Note 2 : Using the correction factor does not make the sensor
specific to that gas. It still responds to all gases, but the
readings or on a scale of equivalent units of the specified gas.
4.7.1. Change LEL/VOL Sensor Type
Note: Combination LEL / VOL Sensor is not available in North
America.
This programming sub-menu applies only to monitors with the
combination LEL/VOL sensor installed. This sensor can be
setup to measure combustible gases by percentage of the
Lower Explosive Limit (LEL), or it can be set up to measure
combustible gases in percent by volume (VOL) levels up to
100%. It can also be set to switch automatically from %LEL to
%VOL when combustible gases go beyond the lower explosive
range. This auto-ranging feature only works for methane gas.
The user can select one of these sensor modes from the first
sub-menu item,
“Change LEL/VOL Sensor Type?”
1. Press the [Y/+] key and the display will ask if you wish to
“Switch to %VOL?”
2. Press the [Y/+] key to accept the new sensor mode. Press
the [N/-] key to cycle through to another mode. Press the
[MODE] key to exit and return to the first sub-menu.
3. Once you select your desired mode of operation for your
LEL/VOL sensor, press the [Y/+] key and the display will
show “Save?” Then, press the [Y/+] key again to accept or
the [N/-] key to discard and advance to the next sub-menu.