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Calibration also completes an operating reliability check of the
Load Sensor Conditioner (see Self Test Routine, on page 4-23).
The system responds to a bad calibration procedure by
flashing the BAL or CAL LEDs. If either of these LEDs
flash, you must correct the error before proceeding. The
section "Calibration and Balance Errors" on page 5-16
includes a table of possible causes and solutions.
A test cannot be started while the LOAD CAL or LOAD
BAL LED is lit, and the calibration and balance func-
tions are locked out while a test is running.
Note
Instron recommends that you check calibration at
least once a day during continuous operation of
your testing system.
Electrical Calibration of Self Identifying Load Cells
To calibrate the load weighing system with a self identi-
fying electrically calibrated tension or compression load
cell installed:
Note
When electrically calibrating a self identifying
load cell, the balance operation is performed
automatically.
(a) Press LOAD CAL key. The Main Panel Display
shows the maximum capacity of the cell and the
LOAD CAL LED lights.
(b) Press ENTER on the keypad. After about 6 seconds,
the LOAD CAL LED goes out and the display goes
blank indicating that calibration is completed. (Go to
"Balance Load Weighing System" on page 5-15.)
Load Calibration
5-9
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