ENMET OMNI-4000 - Manual (Page 11)

OMNI-4000 S/N 6705 and above ENMET Corporation
5
The names associated with the operational mode of these switches are also used for the programming mode.
The programming functions of the BACKLIGHT and MENU switches are indicated by arrows on the control
panel, which are used in certain statements on the display.
1.5 Gas Detection
The OMNI-4000 can be fitted with four of many available gas sensors. See Figure 1-4. Channel No. 1 is reserved for a
sensor for the detection of explosive gases. If an infrared CO2 smart block is used, it must be installed in Channel No. 2
Channels No. 2, 3 and 4 can be a selection of smart block sensor assemblies which are sensitive to oxygen or specific toxic
gases, such as CO, H
2
S, HCL, Cl
2
, etc. Sensor characteristics are given in Figure 4-1.
A channel can be programmed as "Enabled" or "Disabled" as desired by means of the keys on the device.
There is an option which allows the automatic changeover from the explosive gas measurement in the "0-100% LEL"
range to the "0-100% Gas" by volume range. This option can be implemented only when that the device has both an
explosive gas sensor and an oxygen sensor.
Figure 1-3: Switches for Operation and
Programming
Figure 1-4: Location of Openings for Gas
Sensors
On/Off Switch
BACKLIGHT Switch
ENTER Switch
MENU Switch
Explosive Gas Sensor
Location
Sensor Openings