FUTEK IPM600 (D610) Digital Display - Manual (Page 37)

4.CALIBRATION
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4-9. Calibration Protection
Calibration-related set values can be protected so that they will not be changed
by misoperation. When Cal. Protect is ON, no change can be made while the
alarm sounds.
ON: Protected
OFF: Unprotected
How to set
1 Press the MODE button.
2 Press the CALIBRATION button.
3 Press the PAGE button to select the page twice and Press the CAL Lock button.
4 Select the decimal place and determine with the OK button.
Setting call Page 3 Calibration