Channel Reset - Twa Calculations; Card And Channel Select - Honeywell 5704 Operating Instructions Manual

MAN0448_Issue 13_01-2010
005704-M-5001 A03249
CHAPTER 6 - OPERATING INSTRUCTIONS
c. Relay Time Delays
When time delay relay functions are configured, the extended reset
will immediately:
i. Activate any inactive relay where an alarm condition is present
but a relay trigger delay is in progress.
ii. Clear any relay where the alarm condition is not present but
the relay is still active due to a relay hold time in progress.
3.3

Channel Reset - TWA Calculations

To reset a channel short term (STEL) and long term (LTEL) exposure
timer and calculations:
(1) First select the required channel using the procedure outlined in
Section 3.4.1.
(2) With the channel selected, press the RESET/SElECT push-button
continuously for five seconds. During this period the select icon will
flash on and off.
(3) When the flashing stops the exposure timer will be restarted from
zero.
3.4

Card and Channel Select

3.4.1 Card Select
To select a channel card for operations controlled from the Engineering
Card, push and hold the required channel card RESET/SElECT push-
button for approximately 1.5 seconds until the icon display changes
from the normal display to the selected display as shown below:
Normal Operation
Digital
Display
Icon
6-5
5704 Control System
Selected