LS SERIES SERVICE MANUAL
ISSUE 4.0 FULL CONTROL CONSOLE DIAGNOSTICS 14
12.9 Calibrating an Encoder Extensometer
Note that an extensometer can ONLY be Calibrated if an accurate means of measuring
extension is available. For small extensions, say up to 25mm, slip gauges, a calibrated
micrometer or a calibrated vernier can be used and for extensions above this value a
calibrated engineers rule may be used
1 Press the key under > to display the second diagnostic screen shown below
Diagnostics
Slow Jog
Setup External 10
Machine Device mm/min >
2 Press the key under EXTERNAL DEVICE to display the "Extensometer Selection" screen.
Select External Device to Calibrate
XXXXX
< >
3 Select the required extensometer (if more than 1 extensometer is connected to the
machine) then press the ENTER key.
Calibrate External Device
Serial
Number Type Set Calibrate
XXXX XXXX Detail or Verify
4 Press the key under CALIBRATE OR VERIFY to display the screen shown below: -
Serial Number XXXXX Type XXXXX
Measured Ext XXXX mm
Clear Cal View
Points Point Points
5 Attach the extensometer to the calibration device and set to zero extension.
6 Press the Zero key on the control console to zero the machine's extension display.
7 Move the calibration device to the full range of the extensometer.
8 Check that the displayed extension value is within the required accuracy. If not, calculate
the correction factor using the formula shown below: -
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