Monroe Electronics Electrostatic Voltmeter - Isoprobe® - model 244A - Manual (Page 23)

22
1017S/22D: Remove the #0-80 x 3/32” machine screw from the end of the probe nearest
the aperture end of the probe. Replace the screw just removed with the longer #0-80 x
3/16” machine screw furnished with the gradient adapter. Slide the probe into the
adapter until the apertures align. Snug the screw against the body of the adapter and
back off 1/4 turn. DO NOT OVERTIGHTEN. The adapter is now prepared for calibration.
D. CALIBRATION:
Calibration of the Model 1017E/22D Gradient Adapter is acheived by sliding the
adapter forward or backward on the probe until the ISOPROBE® Voltmeter
output indicates exactly one-tenth of a known applied voltage at 1 cm probe-to-
surface spacing.
Calibration of the Model 1017S/22D Gradient Adapter is accomplished by off-
centering the aperture of the gradient adapter in relation to the aperture of the
probe until the ISOPROBE® Voltmeter output indicates exactly one-tenth of a
known applied reference voltage at 1 cm probe-to-surface spacing. This off-
centering action is accomplished by sliding the adapter forward or backward on
the probe case.
Note: In either event above, the Gradient Adapter plate should be grounded to
the electrostatic voltmeter frame and the instrument must be properly zeroed.
(See operating instructions.) Tighten the screw sufficiently to hold the adapter in
place DO NOT OVERTIGHTEN and re-check calibration.