Honeywell 5704 Operating Instructions Manual page 60

MAN0448_Issue 13_2010
005704-M-5001 A03249
CHAPTER 3 CONTROlS AND FACIlITIES
3.3.6 Reject Push-button ( )
When operated during any of the engineers functions and providing the
accept ( ) push-button has not been operated, the reject push-button (
) cancels adjustments that have been made. This push-button is also
used to deselect a selected function and for manual channel display
selections.
3.3.7 BEAD mA Push-button
When the BEAD mA push-button is operated, the display of the selected
Catalytic Control Card provides an indication of the selected channels
sensor head current.
Adjustments to this current can also be made if the Engineering Key is
fitted to the Engineering Card.
3.3.8 AlARMS Push-button
When the AlARMS push-button is operated, the display of the selected
control card provides an indication of the selected channels level and
type (rising or falling) of each alarm level (A1, A2, A3), and the STEL/
LTEL levels
If the Engineering Key is fitted to the Engineering Card, adjustments can
be made to the alarm levels, within pre-defined limits, and additional test
facilities become available. This facility allows each alarm operation to be
checked and, if required, its associated output relay to be exercised.
3.3.9 SIGNAl Push-button
When the SIGNAl push-button is operated, the display of the selected
control card provides an indication of the selected channels sensor
signal as follows:
a. 4 - 20mA Control Card - Loop current in mA.
b. Catalytic Control Card - Catalytic bridge output (sensitivity) in
mV.
3.3.10 ZERO Push-button
The ZERO push-button can only be used when the Engineering Key is
fitted to the Engineering Card and is used to calibrate the zero point of
the selected control card channel.
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5704 Control System