12. Vary the PAR-809C reference resistance by rotang the Posion Selector Knob on the face of
the PAR-809C to successive posions 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 baery at least once each year. Remove baery when device is in extended storage,
i.e. six months or greater
B. Periodically conrm resistance values of each resistance posion at 10 volts using precision wide
range ohmmeter. Contact Prostat Corporaon for calibraon Service if necessary.
C. Resistance measurement conrmaon 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
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