© Edwards Limited 2010. All rights reserved.
Page 13
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OPERATION
D395-90-880 Issue E
4.5
Menu structure (enhanced)
The LEDs along the top of the ADC indicate which item is currently being shown on the numeric display. To select the
next item press the DOWN key ( ), and to select the previous item press the UP key ( ). The available items are
listed in order in
.
4.5.1
Gauge pressure display
When gauge 1 is selected (G1 LED lit) the pressure measured by gauge 1 is displayed. The display is in exponential
format. The units are shown by the LEDs on the right of the display. If gauge 1 is a controllable gauge (for example
an AIM gauge), then you can turn it on and off by pressing the ENTER key (
). Controllable gauges default to off,
and the display shows "OFF". When the gauge is turned on the display will show "Str" whilst the gauge is starting up,
and will then display pressure.
When gauge 2 is selected (G2 LED lit) gauge 2 is displayed and can be controlled similarly.
If either gauge 1 or gauge 2 is displayed, the status of the set-point relays is indicated by the SP1 and SP2 LEDs. The
relays are energised and the LEDs are lit when the measured pressure is below the set-point threshold.
If an error condition is detected by the gauge or by the controller, then the display will show an error message of the
form "Err" followed by a number. Refer to
for a list of error numbers and suggested remedies. To clear
the error message from the display press the ENTER key (
). If the error originated in a gauge it may be necessary
to disconnect the gauge and correct the fault before the error message can be cleared.
If a gauge is not connected then the display will show "- - -".
4.5.2
Set-point and link threshold adjustment
The set-point and link thresholds are adjusted using the front panel keys. Thresholds are entered and displayed as
pressures, using the currently selected units.
To make an adjustment, first select the required threshold using the UP and DOWN keys ( / ). The LEDs are lit
in combination to show which threshold is selected. For example: if SP1 and Hi LEDs are lit together, then the display
is showing the set-point 1 high threshold. If G1, G2 and Hi LEDs are lit together, then the display is showing the link
high threshold.
To change the value press the ENTER key (
). The first digit on the display will flash and can be changed using the
UP and DOWN keys ( / ). When you have selected the required value, press the ENTER key (
) again to select
the next digit. Repeat this process for the second digit and then the exponent. Note that the complete exponent is
Table 8 - Menu items
Gauge 1 pressure display
Gauge 2 pressure display
Set-point 1 high threshold
Set-point 1 low threshold
Set-point 2 high threshold
Set-point 2 low threshold
Set-point 2 controlling gauge
G1-G2 link high threshold
G1-G2 link low threshold
Gauge 1 calibrate
Gauge 2 calibrate
Units select
