Honeywell 5704, Руководство по эксплуатации

Страница: 56 / 191

3-15
MAN0448_Issue 13_2010 5704 Control System
005704-M-5001 A03249
CHAPTER 3 CONTROlS AND FACIlITIES
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.
This will override any sequential display scanning and continuously
display the previously selected channel.
e. Extended Channel Reset
While a channel is selected, the RESET/SElECT push-button when
pressed continuously for five seconds, clears the short term (STEL)
and the long term (LTEL) exposure calculations and sets the timer
to zero.
Note: This operation only affects the selected channel.
2.5 Extraction Slot
An extraction tool is u sed in conjunction with the extraction slot, just
below the select push-button, to remove the card from the rack. The
extraction tool is provided as part of the Key Kit (05701-A-0550) supplied
with each rack assembly.
The card is remove
d by first unscrewing the two card securing screws,
one at the top of the card and the other at the bottom of the card, and
then hooking the extraction tool into the extraction slot and then gently
pulling the card out of the rack.
2.6 Display label and Cover
A clear perspex cover clips to the front panel and retains the label which
provides identification of the control card type, sensor scale, LED and
push-button functions.
Two different label colours are used:
a. Grey/Blue - Four Channel Control Card, Catalytic Sensor
Input
b. Violet - Four Channel Control Card, 4 - 20mA Sensor Input