PR-655/670 User Manual
135
R
OUTINE
M
AINTENANCE
The PR-655 and PR-670 have been designed to give long, trouble-free service requiring minimal routine maintenance. This
section gives guidelines for insuring optimum service from your instrument.
C
LEANING
L
ENSES
/
O
PTICAL
A
CCESSORIES
1.
Keep the PR-655 / PR-670 clean and dust-free. Store the instrument in a clean, dry environment,
preferably in a storage case when not in use. Dust optical surfaces with a soft camel's-hair brush or blow
them off with clean, dry air.
Note:
Avoid touching optical surfaces
.
2.
If the exterior optical surfaces become dirty, clean them as you would any high-quality coated lens. Use
lens cleaning fluid or anhydrous alcohol on a piece of lens cleaning tissue or cotton. Do not soak.
Do not use acetone or other organic solvents or excessive pressure! Do not soak or allow water to enter the
instrument!
C
LEANING
E
XTERIOR
S
URFACES
If the exterior plastic surfaces, such as the display face plate or instrument case becomes dirty or full of
fingerprints, use a mild dish washing liquid and a slightly damp, non-abrasive cloth to gently remove fingerprints
and dirt.
Do not use acetone or other organic solvents or
excessive pressure!
Do not soak or allow water to enter
instrument!
R
ECALIBRATION
The PR-655 is designed to maintain stable calibration for long periods of time and is certified for one year from the factory.
However, changes in calibration are inevitable, due to the effects of aging, temperature and dirt accumulation. Therefore,
for best results, periodic recalibration is recommended.
To maintain the instrument's accuracy, recalibration checks or recalibration is recommended at one year intervals. Please
consult factory for availability of optional user self-calibration.
Please contact the Customer Service Department for a Return Material Authorization (RMA) number, before returning the
instrument.
