Prostat PAR-809C - Maintenance and Care; Battery Replacement and Storage; Resistance Value and Calibration Checks; Cleaning and Care

12. Vary the PAR-809C reference resistance by rotang the Posion Selector Knob on the face of
the PAR-809C to successive posions and record measurements as in step 11.
13. The indicated resistance of the resistance meter should be within 10 percent of the factory
resistance documented.

The PAR-809C is a wired test xture and switch assembly. There
are no resistors or electronic devices employed in this xture.
 
A. Replace 9 volt baery at least once each year. Remove baery when device is in extended storage,
i.e. six months or greater
B. Periodically conrm resistance values of each resistance posion at 10 volts using precision wide
range ohmmeter. Contact Prostat Corporaon for calibraon Service if necessary.
C. Resistance measurement conrmaon should be conducted once each year using a precision wide
range ohmmeter traceable to NIST.
D. Wipe foreign materials from case, receptacles and controls using a so dry cloth.
9
Rev. B / January 2012
PAR-809C Variable Resistance Reference