ENMET OMNI-4000 User Manual
Page 42
ENMET Corporation
OMNI-4000 S/N 6705 and above
36
3.2.3 Overview: Calibrate a Sensor Menu
This menu is used for:
•
Selecting the channel for programming
•
Calibrating the zero point and sensitivity of the sensor assemblies using a calibration gas. An oxygen sensor only
require its sensitivity to be adjusted using pure air.
C
AUTION
: Never start the calibration procedure unless the corresponding cylinder of gas is
available. Scrolling through the calibration menu without applying corresponding
gas will cause the installed sensor to be out of calibration and showing a Fault
condition.
If instrument is new or otherwise in proper working order, this problem can only be
corrected by performing the complete calibration procedure with proper calibration gas.
3.2.4 Overview: Replace the Explosive Gas Sensor Menu
This menu is used for:
•
Selecting the channel for programming
•
Calibrating the zero point and sensitivity of the explosive gas sensor using a calibration mixture (methane)
N
OTE
: There are no menus for the toxic and oxygen smart block sensors as these are factory set. The data for each of
these is contained in the built-in memory of the sensor.
3.2.5 Overview: Set Date and Time Menu
This menu is used to update the internal calendar and clock of the OMNI-4000. This data is used for the time scales,
specifically for the printing or down-loading of the stored readings (min, max, STEL, TWA) to an external computer.
3.2.6 Detail: Program a Sensor Menu
This menu is used for:
•
Selecting the channel (sensor) for programming
•
Enabling or disabling the selected channel
•
Informing the Operator of the sensor type and measurement range,
•
For explosive gas sensors, selecting the reference gas from amongst the 27 preset gas types or inputting the
coefficient for the 28
nd
gas
•
For an oxygen channel, programming the low and high alarm thresholds.
•
For toxic channels, programming the instantaneous alarm levels
Error Display
It is not possible to program a channel without a sensor installed. When the data is entered (erroneous entry), the
display momentarily shows the following:
Bad or absent
cell block