Honeywell 5704, Operating Instructions Manual

Page: 162 / 191

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MAN0448_Issue 13_01-2010 5704 Control System
005704-M-5001 A03249
CHAPTER 7 - ENGINEER'S OPERATING
INSTRUCTIONS
7. CATAlyTIC SENSOR BRIDGE CURRENT
ADJUSTMENT
The operation associated with the BEAD mA push-button only applies
when a catalytic control card has been selected. The pressing of the
push-button with other types of control cards selected has no purpose
and a warning (
xxxx
) is displayed to this effect.
To enter the catalytic sensor bridge current operation, proceed as
follows:
(1) Plug the Engineering Key into the Engineering Card front panel
socket and check that the Unlocked LED ( ) is illuminated.
(2) Push and hold the required control card RESET/SElECT push-
button for approximately 1.5 seconds and check that the selected
control card indicates it has been selected by displaying the select
icon.
(3) Use the Engineering Card ( ) and ( ) push-buttons to select the
required channel.
(4) Push the Engineering Card BEAD mA
push-button and check that the selected
control card message display shows mA
alternating with the selected channel
number. and the digital display shows the
actual bridge current.
(5) If the displayed bridge current is not set to the required value, use
the ( ) and ( ) push-buttons to raise or lower the indicated bridge
current reading until the required value is displayed.
Note: Pressing the push-button will cancel the displayed current without
alteration to the stored value.
(6) Push the push-button to permanently set the new bridge current.
The selected control card channel will then automatically return to
the normal selected state.
BEAD mA