Precision Digital PD650 - Manual (Page 59)

Model PD650 Large Display Process Meter Instruction Manual
59
4-20 mA Isolated Output Option Programming (output)
Programming the 4-20 mA transmitter output option for the meter does not
require the use of a calibrator. The transmitter output can be calibrated so that a
4 mA output is produced for any process/rate measured by the meter. The 20 mA
output may correspond to any process/rate that is at least 501 counts greater or
smaller than the process/rate corresponding to 4 mA. (Ex. 4 mA = 0, 20 mA =
501). If the span between 4 and 20 mA is less than 501 counts, an error
message will appear and the previously programmed values will be retained in
memory until a new set of values is accepted.
Press ENTER, then press ENTER again when the
Output menu appears.
output
Set the display for value at which 4 mA is produced
The green LED labeled “4” will be on indicating the meter is
ready to accept the value at which 4 mA is produced.
The entire display will flash for three seconds. For
instructions see Five Basic Digit/Display Setting
Instructions, page 30.
00000
final
00032
Set the display for value at which 20 mA is produced
The green LED labeled “20” will now be on indicating the
meter is ready to accept the value at which 20 mA is
produced. Program this value in the same fashion as was
done above.
10000
final
01450
4-20 mA Output Programming Confirmation
The values that have been programmed to produce the 4 & 20 mA outputs can
be quickly checked to make sure they are the desired values. To do this, access
the output (outPut) routine by pressing ENTER, and then pressing ENTER again
when outPut appears.
The green “4” LED illuminates indicating the meter is displaying the value at
which it will produce a 4 mA output. Confirm that this is the desired value. Press
ENTER (within 3 seconds) before the entire display stops flashing and the green
“20” LED illuminates indicating the meter is displaying the value at which it will
produce a 20 mA output. Confirm that this is the desired value. Press ENTER
(within 3 seconds), before the entire display stops flashing and the meter returns
to indication mode.