Sensor Signal Monitoring - Honeywell 5701 Operating Instructions Manual

MAN0443.P65 Issue 13 Aug 04
05701-M-5001 A02279
CHAPTER 7 - ENGINEER'S OPERATING
INSTRUCTIONS
11.

SENSOR SIGNAL MONITORING

The operation of the SIGNAL push-button allows the monitoring of the
selected channels sensor signal value. The displayed parameter is
dependent upon the type of sensor drive module fitted to the selected
channel card.
To enter the sensor signal monitoring operation, proceed as follows:
Push and hold the required channel card RESET/SELECT push-
(1)
button for approximately 1.5 seconds until the selected icon appears
on the channel display.
(2) Push the SIGNAL push-button and the selected channel card display
will indicate the sensor signal. The displayed value will depend on the
type of sensor drive module fitted to the channel card as follows:
a. Catalytic Sensor Drive Module
The display will show the live bridge voltage
measured between 01 and 02 in mV. 02 is the
centre point of the second half of the Wheatstone
bridge which is on the channel card.
b. 4 - 20mA Sensor Drive Module
The display will show the live sensor loop current
in mA.
(3) No alterations can be made to the above readings
and pressing either the
return the selected control card to the selected mode.
or push-buttons will
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5701 Control System