ENMET OMNI-4000 User Manual

Page 47

OMNI-4000 S/N 6705 and above

ENMET Corporation

3.3.3 For a Toxic Gas Channel

There is only one alarm threshold to program. The display reads, for instance:

• Press the ENTER switch to confirm the choice. See the "Confirming Data Entries" paragraph.

• Press the MENU switch to reset the alarm value to 0000 ppm.

• Press the MENU switch to modify the alarm value displayed, as follows:

Select the value to the far left by repeatedly pressing the MENU switch. When the desired value is

displayed, press the BACKLIGHT switch.

Continue the procedure until the right-hand numbers are complete. When the desired value is displayed,

press the ENTER switch and this leads into the data entry confirmation procedure.

OTE

: The number of figures making up the alarm value depends upon the type of sensor. This alarm value can

therefore be situated between 1,000 ppm and 0.1 ppm, depending upon the type of sensor installed.

Confirming the Data Entries
The data has been memorized by the OMNI-4000 but not yet confirmed. This procedure enables them to be
confirmed. The display reads:

• The above data which was entered is memorized when the ENTER switch is pressed, or

• The above data is lost and the data existing prior to this procedure is preserved, when any other switch than

ENTER is pressed.

• In either case, the main menu is displayed when a switch is pressed.

Return to Operator Mode

• Remove the programming plug
• The OMNI-4000 is now ready for use

3.4 Detail: Calibrate a Sensor Menu

This sub-menu is used after changing a sensor or the appearance of the "OUTSIDE RANGE" message, which signals a
significant drift in measurements. It enables:

• The selection of the channel aid program
• The automatic adjustment, without using a screwdriver, of the zero and sensitivity of the selected sensor by means

of a calibration gas cylinder. The oxygen sensor only requires adjustment of its sensitivity with pure air.

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.

General
It is not possible to program a channel which does not contain a sensor assembly. When the entered data (erroneous
entry) is confirmed, the display momentarily indicates:

Alarm

0030 ppm

Accept:

ENTER

Cancel: ¨

Bad or absent

cell block