Salter Brecknell 7680 - Manual (Page 28)

Model 7600 Family PWC User’s Manual 28
16. When the choice you want is displayed,
press the UNITS key.
17. Press the ZERO key.. .
DONE is displayed.
18. Close Switch 1 to return to normal weighing
mode.
The Gravity mode feature provides a means of
adjusting the scale’s internal calibration factors to
compensate for variations in acceleration due to
gravity at different geographic locations. These
differences can cause a given mass to indicate a
slightly different weight at an end-user’s (local)
site than it did at the Calibration (CAL) site.
To make the adjustment, you must know the
value of the gravity constant for the local site.
This value is expressed in meters per second,
per second (i.e., m/s
2 ). It is not necessary to
calibrate the scale, therefore, no calibration
weights are needed to make this adjustment.
The scale maintains two gravity setting values.
The first is the “calibration-site” value known as
CAL-GR. The second is the end-user or “local-
site” value and is known as LOC-Gr. When the
scale was originally calibrated at the factory, the
CAL-GR and LOC-GR values were both set to
9.8040 which is the gravity constant for the
manufacturing site.
To adjust the displayed weight value, you must
enter the local gravity value.
Gravity Mode
The CAL-GR and
LOC-GR values may
be viewed anytime.
See Review Scale
Setting section.
Using this feature in
sealed applications
may be subject to
approval by the
appropriate governing
agency at the end-
users site.
Gravity value roles
‘over’ at 9.8400 and
rolls ‘under’ at 9.7700.