PARAMETER SETTINGS FOR POINT # 1
P001 Operation Enter "2" for
space
.
P002 Material No entry required (preset for
liquid)
.
P003 Measurement Response Enter "4" for
surge
(100 m/min, Failsafe Timer = 0.1 minutes).
P004 Transducer Enter "101" for
XCT-8
.
P005 Units Enter "4" for
feet
.
P006 Empty Enter "4.5" for
4.50 ft
(3 feet diameter plus 1.5 ft in standpipe).
P007 Span Enter "3" for
3 ft
(vessel diameter).
P070 Failsafe Timer No entry required, (preset by P003).
PARAMETER SETTINGS FOR mA OUTPUT #1
P200 mA Range No entry required. (preset for
20 mA = low level
, P001 = 2.)
P213 mA Max Limit Enter "22" for
22.00 mA
.
P219 mA Failsafe Enter "20.2" for
20.20 mA
.
PARAMETER SETTING FOR TEMPERATURE AVERAGING
P660 Temp Source Enter "5" for average XCT-8 and TS-3 temperatures.
With process control equipment disabled, enter the RUN mode to monitor system performance and
alarm programming. (A Reading Measurement simulation (P920) may be performed to verify mA
output programming).
When satisfied with system performance and programming, connect mA output 1 to the Programmable Logic
Controller (PLC).
Note that on "power off" the mA output drops to 0.00 mA. During a power interruption, the "last known" mA
output value is maintained in memory for 1 hour minimum. If power is interrupted beyond 1 hour, on power
resumption, the mA output immediately assumes the "new value".
Remaining Vessel Capacity
To perform a volume conversion for the preceding example, complete the following programming.
VOLUME PARAMETER SETTINGS
P050 Tank Shape Enter "7"
*
for
horizontal cylinder with parabolic ends
.
P051 Max Volume Enter "117" for
117 cubic feet
(Use vessel fabricators value).
P052 Tank Dimension A Enter "1.5" for
1.5 ft
(the horizontal length of one parabolic end).
P053 Tank Dimension L Enter "12" for
12 ft
(the horizontal length, excluding parabolic ends).
*
This is the only tank shape where the Empty (P007) value must exactly equal the vessel height.
Now in the RUN mode, the Reading Value
and mA output will represent remaining vessel capacity in cubic
feet. If the mA output is still to be scaled to "space" (distance from material to Full in feet) set the mA Function
(P201) to "2".
01/25/99
PL-508 84
To Next Page
Loading...
