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PD8-6200 Explosion-Proof Analog Input Flow Rate/Totalizer
Instruction Manual
55
Low-Flow Cutoff (
CutofF
)
The low-flow cutoff feature allows the meter to be
programmed so that the often-unsteady output from a
differential pressure transmitter, at low flow rates,
always displays zero on the meter.
The cutoff value may be programmed from 0.1 to
999999. The meter will display zero below the cutoff
value. Programming the cutoff value to zero disables
the cutoff feature. The cutoff can be disabled to
display negative values.
Totalizer Count Up/Down (
Count
)
The totalizer count up/down menu may be used to
program the total and grand total to either count up
from 0 when reset or count down from a programmed
value when reset. Total and grand total may have
their countdown numbers programmed individually
from 0 to 999999.
Analog Output Programming
(
AoutPr
)
The
Analog Output Programming
menu is used to
program the behavior of the 4-20 mA output. The
following parameters and functions are programmed
in this menu:
1. Source: Source for generating the 4-20 mA
output (e.g., rate)
2. Overrange: Analog output value with display in
overrange condition
3. Underrange: Analog output value with display in
underrange condition
4. Break: Analog output value when loop break is
detected
5. Max: Maximum analog output value allowed
regardless of input
6. Min: Minimum analog output value allowed
regardless of input
7. Calibrate: Calibrate the internal 4-20 mA source
reference used to scale the 4-20 mA output
Analog Output Source
The source for generating the 4-20 mA output may be
assigned to the rate/process variable, total, grand
total, maximum or minimum value reached by the
rate/process, or one of the set points, or the Modbus
PV input.
Analog Output Value for Loss of
4-20 mA Input (Loop Break)
The AoutPr - Break menu is used to force the analog
output to go to a user-specified mA value if a break
condition is detected in the 4-20 mA input loop.
Selecting Ignore causes the mA output to go to the
minimum value.
Analog Output Calibration
To perform the analog output calibration,
it’s
recommended to use a milliamp meter with a
resolution of at least 0.1 µA to measure the output
current. The values saved internally during this
procedure are used for scaling the 4-20 mA output in
the
Setup
menu.
Analog Output Calibration
Procedure
1. Wire the PD8-6200 4-20 mA output to a current
loop that includes a power supply (internal or
external 12 to 24 VDC), and the mA input on the
digital meter. See
2. Turn on all devices. Allow for a 15 to 30 minute
warm-up.
3. Go to the Advanced Features menu, navigate to
Select (
Select
) and choose Analog Output
Programming (
AoutPr
)
→
Calibration (
Calib
)
menu and press
Enter
.
4. The display will show
4 nmA
. The PD8-6200 mA
output should now be close to 4 mA. Press Enter
and the display will show 04.000. Enter the actual
value read by the digital mA meter and press
Enter
.
5. The display will show
20 nmA
. The PD8-6200 mA
output should now be close to 20 mA. Press
Enter
and the display will show 20.000. Enter the
actual value read by the digital mA meter and
press
Enter
.
6. The meter will now calculate the calibration
factors and store them.
7. Press
Menu
to exit and return to Run mode.