9150
User's Guide
5-2
The display begins to show the well temperature and the well heater starts
operating to bring the temperature of the well to the set-point temperature.
5.3 Power
Plug the furnace power cord into a mains outlet of the proper voltage, frequency,
and current capability. Refer to Section 3.1, Specifications, for power details.
Turn the furnace on using the rear panel “POWER” switch. The furnace turns on
and begins to heat to the previously programmed temperature set-point. The
front panel LED display indicates the actual furnace temperature.
5.4 Setting the Temperature
Section 8 explains in detail how to set the temperature set-point on the calibrator
using the front panel keys. The procedure is summarized here.
1. Press “SET” twice to access the set-point value.
2. Press “SET” to move the cursor to the units that need changing.
3. Press “UP” or “DOWN” to change the set-point value.
4. Press “SET” until the display exits to store the new set-point.
5. Press “EXIT” to return to the temperature display without saving the new set
point value.
When the set-point temperature is changed the controller switches the well
heater on or off to raise or lower the temperature. The displayed well temperature
gradually changes until it reaches the set-point temperature. The well may
require 35 minutes to reach the set-point depending on the span. Another 10 to
20 minutes is required to stabilize within ±0.5°C of the set-point. Ultimate stability
may take 15 to 20 minutes more of stabilization time.
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