High SetImmerse the sensing portion of the unit in a calibrated temperaturebath or other calibrated source at the desired “Hi Set” temperature.Allow 5 minutes for the thermal system to stabilize. Using a 1/4"open end wrench, slowly turn the main adjustment screw towards theright (counter-clockwise) until the “Hi Set” switch transfers. If switchdoes not transfer, turn the main adjustment screw towards the left(clockwise) until the switch transfers, and then towards the right until ittransfers again. The “Hi Set” switch should now transfer on “temperaturerise” at the bath temperature. If it is desired that the switch transfer on“temperature fall” at the bath temperature, turn the main adjustment screwtowards the left until the switch transfers again.Low SetLower the temperature of the calibrated bath (or use another bath) to thedesired “Low Set” temperature, and allow 5 minutes for the thermal systemto stabilize. Using a 1/4” open end wrench, slowly turn the low set adjust-ment screw towards the left until the switch transfers. If switch does nottransfer, turn the low set adjustment screw towards the right until the switchtransfers, and then towards the left until it transfers again. The “Low Set”switch is now set to actuate at the bath temperature on “temperature fall”. Ifit is desired that the “Low Set” switch transfer on “temperature rise” at thebath temperature, turn the low set adjustment screw towards the right untilthe switch transfers.Fine AdjustmentIf it is necessary to “fine adjust” the “High Set” setting, raise the bath tem-perature to a value slightly higher than the “High Set” temperature. Note thetemperature at which the switch transfers (on rise). Lower the bath tempera-ture and note when switch transfers again (on fall). Turn the main adjustmentscrew towards the left to raise or towards the right to lower the settings.If necessary, perform the same “fine adjustment” procedure outlined abovefor the “Low Set” switch.Single Switch UnitsUncalibrated (C54, C54S, F54, F54S)To adjust single switch units, follow “High Set” instructions. For “fine adjust-ment”, follow Fine Adjustments above.Calibrated (B54, B54S, E54, E54S)Turn the reference dial to desired set point by aligning setting on dial withdowel pin.
