Precision Digital Corporation ProtEX-MAX PD8-6100, Инструкция по эксплуатации

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ProtEX-MAX PD8-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
48
Scaling the 4-20 mA Analog
Output (
Aout
)
The 4-20 mA analog output can be scaled to provide
a 4-20 mA signal for any display range selected.
No equipment is needed to scale the analog output;
simply program the display values to the
corresponding mA output signal.
The
Analog Output menu is used to program the
4-20 mA output based on display values.
For instructions on how to program numeric values
see
Setting Numeric Values on page 34 .
Reset Menu (
reset
)
The Reset menu is used to reset the tare (
rst tr
)
and the maximum or minimum readings (peak or
valley) reached by the process; max & min may be
reset at the same time
by selecting “reset high & low”
(
rst HL
).
Note: Resetting the tare resets the max & min readings.
Tare Menu (
Tare
)
The Tare menu is used to select the tare mode. There
are three modes of operation: Capture Tare ,
Programmable Tare , and Off .
Capture Tare: Pressing the Tare key zeroes the
display and the “T” indicator flashes indicating that
tare is applied to the reading (e.g. Net weight).
Programmable Tare: Program a known value to be
subtracted from the display value to obtain the net
value. Pressing Reset tare clears the tare value to
zero. Programmable Tare will not tare negative PVs.
Use Capture Tare for negative PVs.
Off: Tare function is disabled and pressing Tare key
has no effect.
Tare Functionality (
tare
)
The tare function zeroes out the display. In the case
of scale weight, tare is used to eliminate container
weight and provide net weight readings.
Manual Control Menu (
Contrl
)
The Manual Control menu is used to control the
4-20 mA analog output and the relays manually,
ignoring the input. Each relay and analog output can
be programmed independently for manual control.
Selecting automatic control sets all relays and analog
output for automatic operation.