Vicpas IND110, Техническое руководство

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IND110 Technical Manual
5-9
Calibration
Calibration is done with DIP switches 1-4 and the three buttons. For normal
weighing all the DIP switches are OFF. For calibration, DIP switches 1-4 are
switched ON as required to calibrate the weigh mode ZERO, weigh mode SPAN,
LO setpoint cutoff and HI setpoint cutoff.
Set Weigh Mode Zero
Unload scale. Set DIP switch 1 to ON (all other switches OFF). HI LED will flash
(coarse setting). With a calibration current meter connected to the output, use “+”
and “-“ buttons to adjust output current to desired “zero load” value (Typically 4
mA). If fine adjustment is required, depress “
4 “ button until LO LED flashes. Use
the “+” and “-“ buttons for fine adjustment. When correct zero value is obtained,
return DIP switch 1 to OFF position. The zero load current output is stored.
Set Weigh Mode Span
Load scale with the maximum load weight corresponding to the desired current
output (Typically 20 mA). Set DIP switch 2 to ON (all other switches OFF). HI LED
will flash (coarse setting). use “+” and “-“ buttons to adjust output current to
desired “full load” value (Typically 20 mA). If fine adjustment is required, depress
“
4
“ button until LO LED flashes. Use the “+” and “-“ buttons for fine adjustment.
When correct span value is obtained, return DIP switch 2 to OFF position. The full
load current output is stored. NOTE: It is possible to calibrate with a value less
than full load weight. Simply calculate current output value needed to represent the
load applied and adjust current output for that value. However, the lower that value
is, the lower the setting accuracy obtained. Always try to use the highest
calibration weight possible.
Set HI setpoint cutoff value.
Load scale with a value equal to the desired HI setpoint cutoff point and note the
4/20 mA current output reading. Alternatively, calculate the output current at the
desired load cutoff point. Remember the value and turn ON DIP switch 3 (all other
switches OFF). HI LED will flash. Using the “+” and “-“ buttons, depress them until
the 4/20 mA output matches the remembered value. As with the weigh mode
calibration, the “
↵
“ button can be used to toggle into fine adjustment mode if
needed. Return DIP switch 3 to OFF when complete.
Set LO setpoint cutoff value.
This setpoint is identical to the HI setpoint calibration except DIP switch 4 is used
instead. Note: there is no significance to the HI and LO setpoint names. The HI can
be set for the lowest value if desired. It is simply a way to keep track of the values.
Also, it is not necessary to use either setpoint. Do not program if not needed.