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Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Meter Operation
The meter is capable of accepting any signal from
-250 to 250 mV in bipolar mode, or 0 to 300 mV in
unipolar mode, and displaying these signals in
engineering units from -99999 to 999999 (e.g. a
0-100 mV signal could be displayed as 0 to 50000).
The dual-line display can be customized by the user
to operate in such a way as to satisfy a specific
application. Typically, display line 1 is used for the
process variable; while line 2 is used for engineering
units, custom legend, or set point indication.
The input signal can be scaled to display the process
in two different scales; for example, line 1 could
indicate weight in pounds and line 2 could indicate
percent of maximum weight capacity. The meter can
also be set up to display the mV input on line 1 and
the Modbus input on line 2. The relays and analog
output can be programmed to operate from the
Modbus PV input if the Modbus input has been
assigned to display line 1.
During operation, the meter can be either tared or
zeroed. The tare feature is useful for momentarily
zeroing out of the display, in the case where there is
additional weight than what is intended to be
measured (e.g. a bucket on the scale is being filled
with material). The meter will display a T to indicate
that the display has been tared and taring is
resettable via the reset tare operation. The zero
feature is useful for permanent zeroing of the meter,
in the case where there has been drift in the strain
gauge output over time. The zero feature will zero out
the display without indication or the ability to reset.
Button Operation
Button
Description
Symbol
Press to enter or exit Programming
Mode.
Press to zero the meter or other
parameter/ function assigned through
the User menu.
UP
Press to reset tare or other
parameter/function assigned through
F2
RESET
the User menu.
Press to tare the display value or other
parameters/function assigned through
the User menu.
Function Keys Operation
During operation, the programmable function keys
operate according to the way they have been
programmed in the Advanced Features – User menu.
See Programmable Function Keys User Menu (user)
on page 47 for details.
The table above shows the factory default settings for
F1, F2, and F3.
Digital Inputs Operation
Five (5) digital inputs, F4, DI-1 to DI-4, come standard
on the meter. These digital inputs are programmed
identically to function keys F1, F2, and F3. The inputs
are triggered with a contact closure to +5 in the case
of digital inputs 1-4 or with an active high signal, see
Digital I/O Connections on page 21 for details. The F4
is triggered with a contact closure to COM or with an
active low signal. During operation, digital inputs
operate according to the way they are programmed in
the Advanced Features – User menu. See
Programmable Function Keys User Menu (user) on
page 47 for details.
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by
the process can be displayed either continuously or
momentary:
1.
Display briefly by assigning to the F1-F3 function
keys or to the digital inputs in the User menu.
Any of the F1-F3 function keys (buttons) and the
digital inputs can be programmed to reset the
max & min readings.
2.
Display continuously by assigning either display
to max/min through the Display menu.
To display max reading using function key:
1.
Press user assigned function key/digital input to
display maximum reading since the last
reset/power-up.
2.
To reset max/min, press the Menu button, then
the Up arrow/F2 button until the Reset (Reset)
menu is displayed.
3.
Press the Up arrow/F2 button to select reset high
(rst Hi), reset low (rst Lo), or reset high and
low (rst HL) is displayed and then press the
Enter/F3 button. The max and/or min displays are
reset to actual values.
4.
Press Menu to exit max/min display reading.
To display max/min readings continuously:
Assign either display to Max (d Hi), Min (d Lo), or
toggle between Max and Min (d HL) every 10
seconds.
49
Instruction Manual
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