Page 82 MSI-3750CS-5 RF Weighmeter • User Guide
3750CS
C
ELL
S
CALE RF DIGITAL WEIGHT INDICATOR
®
10) Span Calibration – The CellScale can be calibrated
with any in span test weight. A minimum of 1 and a
maximum of 5 weights can be used and the weight
can be applied in any random order. Place the
calibration weight on the load receptor.
11) Next, input your calibration weight value using the
numeric keys. In this example, we show calibrating
with a Test Weight certified at 500.2 kg.
12) Once the weight value is complete and the weight
on the load receptor is stable, push ENTER. The
message “CAL’ING” appears.
The 3750CS checks to see if the weight data is within acceptable limits.
13) Next the message indicates “WEIGHT X” (X = 2
to 5). Repeat steps 10 through 12 for additional test
weights.
14) The span calibration process is finished by either
a) pushing the EXIT key after at lest 1 span point
has be calibrated, or b) when the 5th span point is
calibrated.
15) If the Span parameters were OK, the message will
read “CAL OK” then “STORING”. Calibration is
complete, push EXIT to return to normal scale opera-
tion, or push UP/DOWN to choose another Calibrate
Setup function. Seal the calibration port.
10
Load scale with calibration weight
11
5_
11
50_
11
500_
11
500._
11
500.2_
When the weight it stable
12
CAL’ING
13
WEIGHT x
14
or 5th Cal Point
15
CAL OK
STORING
15
or
TO ENABLE / DISABLE AZM (AUTO ZERO MAINTENANCE)
AZM is used to adjust out variations at zero caused by debris or water on the scale, temperature drift, and any
other minor variation that affects the zero setting. Typically AZM is set to 0.5d or 1d, which is adequate for most
modern scale systems. The CellScale allows for a much greater AZM range (non legal-for-trade scales only) for
unique applications. Use this feature cautiously as it can zero out large weight amounts unexpectedly.
An example of where a large value AZM can be advantageous is when packing produce. Typically there is some variation in the weight of the packing boxes. By
setting the AZM to equal the largest variation in box weight, the error in weight caused by the box variations can be eliminated automatically. The key to making this
work is that the first amount of produce placed in the box has to weigh more than the AZM range so that the produce isn’t also zeroed out.
The CellScale can also adjust the time interval of AZM, but only through the Terminal Interface (refer to the
CellScale manual). AZM time interval defaults to 1/second.
Do not disable AZM. The ability to disable AZM is only intended for regulatory agencies that conduct
tests without AZM enabled. Disabling AZM will degrade temperature and drift performance of the
CellScale. Also use caution in setting the AZM window too large. This can cause the scale to zero
unexpectedly. MSI recommends keeping AZM below 5d for most applications.