Precision® Instruction ManualOPERATION (Contd.)Models180-186(Model 188 has a double configuration of the above.)SettingThermostat:A referencedialis provided to correlate thermostat setting with temperature readings taken from themercury-in-glass thermometer.NOTE:Reference dial numbers are for reference only and are not val-ues for water temperature within the unit.To determine what temperatures may be expected from various settings on the dial, select an arbitrary setting of"4" byturning the control knob in a clockwise direction. (With warmer water, a higher setting may be necessary.) With the dialset at "4" or higher, the neon-glow pilot lamp is energized. Temperature equilibrium will be indicated by a steady cyclingof this lamp from "On" to "Off" approximately every minute. At this point, a temperature reading should be taken fromthe thermometer and noted.It is suggested that the above procedure be repeated at progressively higher settings on the reference dial. Approach allsettings in a "clockwise" direction. This means that when changing from a high setting to a lower one, the control knobshould be turned back past the lower setting desired and then approached in a "clockwise" direction.ServicingCleaning:To remove algae and to clean the bath, a detergent solution is recommended. Should algae or any other un-desirable microorganisms form on top of the bath media, add a little formaldehyde or zephiran chloride to alleviate thisproblem.WARNING: Unit must be disconnected from power source prior toservicing. It is recommended that all service be performed byqualified service personnel.-5-
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