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HA71 Digital Gas Controller
2.2.6 Marker Menus
Some transmitters or monitoring devices providing HA71 inputs also
indicate special modes of operation, such as Calibration, Maintenance
or Fault, by transmitting a special <4mA or negative "Marker" value.
The HA71 offers channel Marker menus for detecting and indicating
such events (see Figure 2-6). While active, the HA71 displays a 6-digit
ASCII message to indicate the special event and if equipped with
10-0167 4-20mA output option, the HA71 also transmits the same
<4mA value.
•
Marker Enabled
turns the marker feature ON and OFF
•
The negative Marker value is entered into the
as a negative percent of full scale. For example, -15.62% of
full scale detects a marker value of 1.5mA (1.5mA is -15.62%
of full scale when 4-20mA is the range).
•
The
Mark As menu allows user entry of the 6-digit ASCII
message to be displayed when the marker is detected.
Figure 2-6. Marker Menus
2.2.7 Linearization Menu
The linearization menu allows each channel to have it's own
linearization curve stored in the controller's non-volatile memory. Input
versus output points must be entered in percent of full scale values.
This means if the range is 0-200 ppm H
scale. Zero input will provide a zero output and 100% input a 100%
output. Nine intermediate points may be entered to define the curve.
HA71 Technical Manual
Marker % field
S then 100 ppm is 50% of full
2
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Linearize
Configure
Calibrate
Entry menu
Figure 2-6. Linearization Menu
2.2.8 Configure Menu
From the entry level setup menu in Figure 2-7 the CONFIGURE
menu may be entered for setting variables defining how the controller
presents monitored data to the various graphic displays.
Channel XX
Measurement Name
Alarm 1
Alarm 2
Alarm 3
Data From
Linearize
Configure
Calibrate
Entry menu
Figure 2-7. Configure Menu
2.2.9 Eunits / Measurement Name ASCII Data Fields
The first two items in this menu are for entering the 6 character
engineering unit and 16 character Measurement Name ASCII fields.
Eunits should define the units of measure for what this channel is to
display. Measurement Name should describe the source of this data
in the user's terminology.
to use the front keypad to modify these fields.
2-6
Channel XX
Linearization
EDIT
%Input
%Output
10.00
10.00
20.00
20.00
30.00
30.00
40.00
40.00
50.00
50.00
NEXT
60.00
60.00
70.00
70.00
80.00
80.00
90.00
90.00
Linearization menu
Channel XX
CONFIGURATION
EDIT
Measurement Name
Eunits
PCTLEL
Zero
0.000
Span
100.0
Decimal Points
0
NEXT
Channel On?
YES
Copy To
XX
Copy Now?
Input / Copy To: menu
Section 2.1.1
of this manual describes how
Revision 3 (04/08)
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