Manual
22
Press
(SELECTCHANNEL)toscrollthroughandchoosethechannel
you wish to calibrate. Once you have chosen the desired channel you wish
to calibrate press
(CLEARCALIBRATION).
WARNING: IF YOU CLEAR A CALIBRATION IT IS LOST FOREVER!
Afterthecalibrationhasbeencleared,Press (CALIBRATECHANNEL)
You should see this screen:
Press (SETGAIN).Withtheinstrumentyouwishtocalibrate
mounted to a calibration frame attached to the HM-3000, record the sensor
min value with no load on the instrument (X divisions).
Next,applythefullengineeringloadvaluetoinstrumentonthecalibration
frame and again, record the sensor min reading (X divisions). Subtract the
two values. This value should be a number larger than the sensor maximum
rating.
Ifnot,youneedtoincreasethegaintocompensateforthedifference.Press
(SETGAIN)andrepeatuntilthedifferencebetweenthetwovaluesis
more than the maximum sensor rating.
EXAMPLE:
If you are calibrating a 10,000 lb. load cell, you need a difference value of
at least 10,000 divisions. If you register a min value reading of 450 divisions
with no load on the sensor and your min is 8450 divisions at full load on
the instrument, your difference value will be 8000 divisions. (8450 – 450 =
8000). To increase the gain press
(SETGAIN)untilyouhavemore
than 10,000 divisions.
Once the gain has been set, the zero point needs to be set. To set the zero
point, apply the 0% force to the sensor and press
(SETSENSORMIN).
Nowapplythe100%forcetothesensorandpress (SETSENSOR
MAX).
To return to any prior screen you can always press
On the next page is an Instrumentation calibration chart listing max
divisions, as well as typical gain factors needed in calibrating each
instrument type.
CH1 CALIBRATION
* SET GAIN 1
* SET SENSOR MIN 123
* SET SENSOR MAX 12345