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SETUP AND CALIBRATION, CONT.
CAL (CAL?) - Calibration
With CAL (CAL?) displayed, press the ENTER key. The display will change to show the current
setting NO. If calibration is desired, press the 1/YES key, then press the ENTER key to
continue to the CAL1= setting, otherwise press the ENTER key to advance to the
CALIBRATION MODES
The 212G/212GX has five modes that can be used to perform calibration. Three of the modes
require a test load or test weights, one requires the scale to be empty (and at zero) and the
last uses the calibration "C" numbers from a previous calibration. The modes are as follows:
1. Dual-Point with Zero (First Zero)
This is a standard calibration method requiring one weight, an empty scale and has one
conversion factor. This method uses two calibration points (CAL1= and CAL2=) to establish a
zero (no load) calibration value and to span the indicator. The two points correspond to
zero weight and the test load or test weight and can be applied in any order. This method
should be used for first-time calibration and complete recalibration.
2. Dual-Point without Zero (False Zero)
This calibration method requires one test weight and establishes a new conversion factor
only. It is used to establish a false (temporary zero) zero without affecting the zero
calibration value stored during the last calibration. This is particularly useful in tank
weighing applications, where it may be impractical or impossible to completely empty the
tank. This method uses two calibration points, CAL1= and CAL2=. The value of the test
weight is entered when CAL1= is displayed and the NET/GROSS key is pressed when CAL2=
is displayed.
3. Single-Point for Span Only (Last Zero)
This calibration method requires one test weight and establishes a new conversion factor
(span) without affecting the zero calibration value stored during the last calibration. This
minimizes placing and removing test weights and is especially useful when checking high
capacity scales. This method uses two calibration points, CAL1= and CAL2=. The value of the
test weight is entered when CAL1= is displayed and the ZERO key is pressed when CAL2= is
displayed.
4. Single-Point for Zero Only (Only Zero)
This calibration method requires no test weight, an empty scale and establishes a new
zero without affecting the conversion factor (span). This is useful to regain the full range of
zero limit when the dead load of the scale has changed. This would occur for example, if a
guard rail has been added to the scale platform. This method uses two calibration points,
CAL1= and CAL2=. The ENTER key is pressed when CAL1= is displayed and the ZERO key is
pressed when CAL2= is displayed.
5. Calibration "C" Numbers
The calibration "C" numbers (C1, C2, C3 and C4) are displayed only during the Test mode
operation and are shown at the end of the test. Each number is displayed for
approximately 4 seconds, allowing you to record them. These numbers correspond to the
calibration setting of the indicator. The numbers may be up to three digits in length. By
recording these numbers you will be able to return the indicator to its present calibration
settings without using test weights simply by entering the "C" numbers. Refer to the
Calibration "C" Number section of this manual for instructions on viewing the "C" numbers.
8200-M628-O1 Rev A 212G/212GX Installation & Technical
Sio
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