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CALIBRATION
The balance offers a choice of six calibration methods:
Internal Calibration, Automatic Calibration (AutoCal),
Calibration Adjust, Span Calibration, User Calibration
and Calibration Test.
NOTE: Do not disturb the balance during
calibration.
INITIAL CALIBRATION
When the balance is first installed, and when it is
moved to another location, it must be calibrated to
ensure accurate weighing results. The balance has
built-in autocal, which can calibrate the balance
automatically and does not require calibration masses.
If preferred, the balance can be manually calibrated
with external masses. Have the appropriate calibration
masses available before beginning calibration.
AUTOCAL™ INTERNAL CALIBRATION
Calibration is accomplished with the internal calibration
mass. Internal calibration can be performed at any time,
provided the balance has warmed up to operating
temperature and is level.
With the balance turned ON and no load on the pan,
touch AUTOCAL™ INTERNAL CALIBRATION to begin
calibration.
Alternately, touch the shortcut CALIBRATION icon from any
Application home screen to initiate an Internal Calibration.
The display shows the status, then returns to the current
application. To cancel at any time, press CANCEL.
AUTOMATIC CALIBRATION
When Automatic Calibration is on, the balance performs
a self calibration when it senses a temperature change
of 34.7 ° F or every 11 hours.
AutoCal will automatically calibrate the balance (using
the internal mass) each time there is a change in
temperature significant enough to affect accuracy.
AUTOCAL ADJUSTMENT
Use this calibration method to adjust the zero calibration
point, without affecting the span or linearity calibration.
Calibration Adjust may be used to adjust the result of
the internal calibration by +/- 100 divisions.
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OPERATION CONTINUED
Example:
Actual Weight Reading
Expected Weight Reading
Difference Weight (d)
Difference Weight in Digits
To perform a Calibration Adjustment, touch AUTOCAL
ADJUSTMENT from the Calibration Menu. Enter the value
(positive or negative divisions) to match the difference
noted earlier in the procedure and press –.
Recalibrate using internal calibration. After calibration,
place the test mass on the pan and verify that the reading
agrees with the test mass. If not, repeat steps until the
reading matches the test mass.
Once completed, the balance stores the adjustment
value and the display returns to the current application.
SPAN CALIBRATION
Span calibration uses two calibration points, one at zero
load and the other at specified full load (span).
With the balance turned on and no load on the pan,
touch SPAN CALIBRATION to initiate the procedure.
Additional calibration values to be used are shown on
the display. The best accuracy is achieved using the
mass closest to the full span value.
To change the span calibration point, touch the
alternate weight shown on the display. Follow the
screen instructions and place the specified calibration
weight on the balance when prompted to do so. When
complete, the display shows the span calibration status
and returns to the current application.
NOTE: Before making a calibration adjustment,
perform an internal calibration. To verify
whether an adjustment is needed, place a test
mass equal to the span calibration value on
the pan and note the difference (in divisions)
between the nominal mass value and the
actual balance reading. If the difference is
within +/- 1 division, calibration adjustment is
not required. If the difference exceeds
+/- 1 division, calibration adjustment is
recommended.
CALIBRATION WEIGHTS
ULINE
OHAUS
MODEL NO.
MODEL NO.
H-4737
EX224
H-4738
EX4202
H-4739
EX6202
NOTE: Factory default settings are shown in bold.
200.014
200.00 (Test mass value)
0.014
–14 (Adjust value)
SPAN CAL POINTS (G)
100g, 150g, 300g
2,000g, 3,000g, 4,000g
3,000g, 4,000g, 5,000g, 6,000g
0924 IH-4737
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