Athena 6075 series, Instruction Manual, Page: 37 / 39

SECTION 7 CALIBRATION
WARNING: These adjustments are factory set and should only be changed by a
qualified person using calibrated equipment. Adjustment is not necessary during
the life of these controllers.
7.1 Zero (-cL-) and Span (cH) Calibration
1.
2.
3.
4.
5.
Unlock access to the calibration constants by entering the unlock
number (14) into location 9 (-cd-).
Use a tempemture calibmtor with a range appropriate for the unit to be
calibrated. Set in the value for low scale calibration, e.g. (1 % of range).
Step to -cL- (calibmte low [ZERO]) using tie index key on the 6075.
press the up/down keys on the 6075 until both instruments agree
press the ‘ENTER’ key.
Set in a value on the calibrator equivalent to the high-end capability of
the unit under test e.g. (95% of range).
Step to -cH- (calibrate high [SPAN]) using the INDEX key.
Press the up/down keys on the 6075 until both instruments agree.
Press the "ENTER" key.
Repeat steps2 thru 7 until readings agree. Some interaction between
Zero(-cL-) and Span (-cH-) calibration usually occurs
Lock out configumtion access, if desired, and return to set point by
pressing "SET POINT" key.
NOTE: Pressing index continuously selects -cH- or -cL- (Span and Zero) in
the calibrate mode to faciliite testing. Exit this mode by pressing the ‘SET
POINT" key.
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6.
7.
8.
9.