Helios Large Display Dual-Input Meter Instruction Manual
PD2-6060
54
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 to 999999. The meter will display zero below the cutoff
value. Programming the cutoff value to zero disables the cutoff feature.
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. PV)
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 analog output source can be based on either of the input channels (Ch-A, Ch-B), the math channel
(Ch-C), maximum stored value of either input channel (Hi-A, Hi-B), minimum stored value of either input
channel (Lo-A, Lo-B), relay set points, or the Modbus input.
Analog Output Calibration
To perform the analog output calibration, it is 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.
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