3BHE037864R0106

Description

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During the inhibit condition, the channel card will continue to read the

gas sensor reading, however, no action is taken in the event of an

alarm condition being exceeded.

c. A1 - Red LED

The A1 LED indicates that the preset first level gas alarm has been

exceeded. This alarm will not function in the event of either a fault or

inhibit condition being active.

d. A2 - Red LED

The A2 LED indicates that the preset second level gas alarm has

been exceeded. This alarm will not function in the event of either a

fault or inhibit condition being active.

e. A3 - Red LED

The A3 LED indicates that the preset third level gas alarm has been

exceeded. This alarm will not function in the event of either a fault or

inhibit condition being active.Reset/Select Push-button

The front panel RESET/SELECT push-button provides four functions

depending upon how it is operated:

a. Alarm Reset

The RESET/SELECT push-button, when pressed momentarily, resets

any latched alarm, non active alarms, faults, warning or information

messages, clears the display peak reading indicator and will

acknowledge an update if such a condition is present.

Note: 'Non active alarms' describe the occasion where the alarm condition

has cleared but the alarm is still indicated due to latched

information. For non-latched setups the indicated alarms will clear

automatically when the alarm condition clears.

b. Channel Select

The RESET/SELECT push-button, when pressed for approximately

1.5 seconds, selects the control card for operations controlled from

the Engineering Card.

c. Extended Reset

The RESET/SELECT push-button, when pressed continuously for

five seconds:

i. Clears the channel maximum and minimum gas readings.

ii. Resets any active short term (STEL) and long term (LTEL)

exposure alarms clearing the timer to zero.

iii. For active time delay functions, activates any relay with

impending trigger and clears any relay being held.

d. Channel Deselect

The RESET/SELECT push-button, when pressed momentarily while

a control card is selected, deselects the control card from the

Engineering Card functions.

Note: The control card may also be deselected by pressing the key