M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
Page 124
MSI-3750 Digital Weight Indicator
◆
User Guide
intended only as a guide. If the gain is set too
high it can be corrected later. The gain setting
must be made properly to ensure that there is an
adequate number of A/D counts. Too low a
setting can result in linearity or noise problems.
Too high a setting will cause the A/D to over
range prematurely.
12) When the proper gain is displayed push
ENTER
.
13) Zero Calibration – The message reads “Ø
SCALE”. Remove all weight from the
scale.
14) When the load receptor is stable push
ZERO
or
ENTER
. The display reads
“CAL’ING”. Wait for about 5 seconds. If
the detected zero weight is within accept-
able limits the message “WEIGHT” will
appear.
The bargraph indicates relative A/D counts.
With exactly zero volts input it will indicate
50%. Readings from 10% to 60% are fine for
cal. Readings above 60% are too high and
should be corrected with Coarse Zero.
15) Span Calibration – The 3750 can be
calibrated with any in span test weight from
20% to 100% of capacity.Place the calibra-
tion weight on the load receptor.
MSI suggests that an ideal test weight is equal to
capacity, but any weight
≥
20% of capacity will
suffice. The bargraph again indicates relative A/
D counts. With full scale span input the
bargraph should indicate at least 20% above the
zero reading. If this is not true, go to “INIT
CAL” and increase the Gain.
16) Next, you will need to input the exact value
of your calibration weight using the
numeric keys.
In this example, we show calibrating out
1000kg capacity scale with a Test Weight
certified at 2000 lb. Since 2000 lb is equal 907.2
kg (2000*.4536) we’ll use 907.2 here.
17) Once the weight on the load receptor is
12
ENTER
13
Unload Scale
0 SCALE
14
ENTER
CAL’ING
“Cal’ing” message displays while scale is zeroing (1-5s).
when zeroed:
WEIGHT
15
Load Scale
25
SETUP
0
50
75
100
%
16
9
@
YZ
9_
16
0
SPACE
90_
16
7
STU
907_
16
F1
907._
16
2
DEF
907.2_
Wait for stability on scale...no motion.
17
ENTER
CAL’ING
Summary of Contents for MSI-3750
Page 145: ......
