ThermoWorks 9150-X HART SCIENTIFIC 9150 THERMOCOUPLE FURNACE - Manual (Page 21)

7 General Operation
7.1 Changing Display Units
The 9150 can display temperature in Celsius or Fahrenheit. The temperature
units are shipped from the factory set to Celsius. To change to Fahrenheit or
back to Celsius there are two ways:
1 - Press the “SET” and “DOWN” simultaneously.
or
1 - Press the “SET” key three times from the temperature display and then
“EXIT” to show the units.
Un= C
2 - Press the “UP” or “DOWN” key to change units.
3 - Press “SET” to store changes and then “EXIT” to display the temperature.
7.2 Switching to 230V Operation
The 9150 is switchable from 115 VAC to 230 VAC 50/60 Hz. Switching the
voltage can change the calibration, so the unit should be calibrated after
changing the input voltage.
To change from 115 VAC to 230 VAC
1. Unplug the unit.
2. With a small straight slot screwdriver remove the fuse holder from the
PEM located on the back of the unit.
3. Replace the two 12A F 250V fuses with two 6.3A F 250V fuses.
4. Replace the fuse holder with the “230V” in the display window.
5. Lay the unit on its side and with a small straight slot screwdriver, move
the heater switches located on the bottom of the unit to display “230V”.
Note: If the heater switches and the fuse holder do not all read “230V when
complete, the unit will either not heat or only heat at a fraction of its capacity.
If not done properly, the unit could become damaged and void the calibration
and warranty. Refer to Section 3.1, Specifications, for correct fuse usage.
CAUTION: Do not plug the unit into 230V if the heater switches and fuse
holder read 115V. This will cause the fuses to blow and may damage the
instrument.
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7 General Operation
Changing Display Units