6 . 3 Fuse Replacement
The main fuse on the 14HE is located in the power input module. All other
fuses are located inside the case and are accessible by removing the rear
panel
6 . 4 Accuracy Checking
Magnification Accuracy
NOTE:
It must be stressed that the following is not part of the routine installation
and servicing procedure.
This inspection instrument is designed to project an image /- .10%
on profile and +/- .15% on surface illumination over the entire screen. Prior
to shipment the unit is calibrated and certified to be well within this
specification. If image accuracy of this magnitude is required on a daily
basis by you, the customer, then an established calibration interval must be
determined to meet your requirements.
Although the generally accepted calibration interval for this type of optical
inspection equipment is 1 year; factors such as frequency of use,
environment and duty may affect the ability of any instrument to remain in
calibration. Calibration intervals must be adjusted up or down to compensate
for these factors. If only one lens shows a magnification or distortion error, it
is possible that adjustment is required to only the lens. Simply loosen the
lens retaining ring and adjust the lens as required.
If magnification is not uniform over the entire screen then mirror adjustment
will be required. Consult a qualified/certified individual or organization to
perform this task. It is considered to be out of the scope of the average user
to maintain the proper calibration equipment and training required to
accurately calibrate an optical instrument. Dorsey Metrology International
OMD provides this service and also training classes on calibration.
Consult us for details.
6. MAINTENANCE
