Span Signal Calibration - Honeywell 5701 Operating Instructions Manual

MAN0443.P65 Issue 13 Aug 04
05701-M-5001 A02279
CHAPTER 7 - ENGINEER'S OPERATING
INSTRUCTIONS
9.

SPAN SIGNAL CALIBRATION

Note: If a new sensor is being calibrated for the first time, use the 1st
Span procedure in Section 10.
To select the span operation, proceed as follows:
(1) Plug the Engineering Key into the Engineering Card front panel
socket and check that the Unlocked LED (
(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) Push the Engineering Card SPAN push-button and the
selected control card will automatically be inhibited and
one of the following displays will be shown on the control
card message display:
a.
b.
A A A A
V V V V
c.
On Control Cards fitted with version 2.4 software, when zero suppression
is enabled the span gas concentration may be displayed as zero (0)
until the span gas is applied. No adjustment sould be made until a
reading is shown.
(4) Check that the selected control card digital display indicates the
required span gas concentration to be used, if not, use the
push-buttons to raise or lower the indication until the correct
concentration is displayed.
Note: 1. The analogue display will continue to show the current sensor
live signal level.
2. Pushing the
to the selected mode without any changes to the original span
setting.
Indicates a stable gas reading.
Indicates a rising gas reading.
Indicates a falling gas reading.
CAUTION
button at this stage will return the control card
7 - 14
5701 Control System
) is illuminated.
and