ENMET OMNI-4000 User Manual

Page 46

ENMET Corporation

OMNI-4000 S/N 6705 and above

3.3 Setting an Alarm Threshold

3.3.1 For an Explosive Gas Channel

For all explosive gases except "Methane - Range 0-5%"

• A message is displayed, for instance:

To modify the alarm threshold, proceed as follows: The allowable alarm values are between 0 and 60% LEL:

• Select the tenths by repeatedly pressing the MENU switch. When the desired value is displayed, press

BACKLIGHT switch.

• Select the units by repeatedly pressing the MENU switch. When the desired value is displayed, press the ENTER

switch.

For Methane - Range 0-5% only.

• A message is displayed, for instance:

To modify the alarm threshold, proceed as follows; the allowable alarm values are between 0 and 3.0% CH

• Select the units by repeatedly pressing the MENU switch. When the desired value is displayed, press

BACKLIGHT switch.

• Select the tenths by repeatedly pressing the MENU switch. When the desired value is displayed, press the

ENTER switch.

3.3.2 For an Oxygen Channel:

There are two alarm values to be programmed, the High Alarm and Low Alarm values:

• The maximum permissible high alarm value is the upper value on the sensor measurement scale.
• The minimum permissible low alarm value is the lower value on the sensor measurement scale. The maximum

lower alarm value is the high value of the sensor measurement scale.

Entering the High Alarm Value
The device displays, for instance:

• Press the ENTER switch to confirm the choice. Go to the "Confirming Data Entries" paragraph, below.
• Press MENU switch to reset the alarm value to 00.0% O

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

Select the tens by repeatedly pressing the MENU switch. When the desired value is displayed, press

BACKLIGHT switch.

Select the units by repeatedly pressing the MENU switch. When the desired value is displayed, press

BACKLIGHT switch.

Select the tenths by repeatedly pressing the MENU switch key. When the desired value is displayed, press

ENTER switch and this leads into the data entry procedure for the low alarm value.

Entering the Low Alarm Value
The procedure is the same as for "Entering the High Alarm Value." Pressing the ENTER switch completes the
process.

Comb. Alarm:

20LEL

CH4

Comb. Alarm:

1.1%

CH4

Alarm high

23.5%