Thermo Scientific 3051 Series, Operating Manual And Parts List

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8. Use a thin blade screwdriver to calibrate Low Adjust. Check
thermometer reading. If reading is less than 35°C, rotate Low Adjust
CCW slightly to turn heater on. If reading is above 45°C, rotate Low
Adjust CW slightly to turn heater off at lower temperature. After each
adjustment allow sufficient time for oven temperature to restabilize.
Repeat until thermometer reading is 40°C ±5°C
9. Replace temperature dial knob with pointer at 40°C, then tighten
setscrew, being careful not to rotate the dial shaft.
10. Set temperature dial to 200°C.
11. After the Heat indicator begins cycling on/off, allow an additional 30
minutes for oven to reach a final, stable temperature. If thermometer
reads 200 ±5°C, calibration is complete. Otherwise, continue with
following steps.
12. Carefully remove the temperature dial knob without rotating it.
13. Use a thin blade screwdriver to calibrate High Adjust Check
thermometer reading. If reading is less than 195°C, rotate High Adjust
CW slightly to turn heater on. If reading is above 205°C, rotate High
Adjust CCW slightly to turn heater off at lower temperature. After
each adjustment, allow sufficient time for oven temperature to
restabilize. Repeat until thermometer reading is 200 ±5°C.
14. Replace temperature dial knob with pointer at 200°C, then tighten
setscrew, again being careful not to rotate the dial shaft.
15. Set the temperature dial to 180°C. The Alarm indicator should come
on if calibration is correct.
5-4 Precision Standard Oven Thermo Scientific
Section 5
Operation
Calibration
(continued)