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“POWER” switch. The dry-well will turn on and begin to heat to the previously
programmed temperature set-point. The front panel LED display will indicate
the actual dry-well temperature.
The 9107 is field switchable between 115 V and 230 V. Refer to Section 7.2,
Switching to 230 V Operation, for information on switching the voltage.
5.4 Setting the Temperature
Section 8.3 explains in detail how to set the temperature set-point on the cali
-
brator using the front panel keys. The procedure is summarized here.
1. Press “SET” twice to access the set-point value.
2. Press “UP” or “DOWN” to change the set-point value.
3. Press “SET” to program in the new set-point.
4. Press “EXIT” to return to the temperature display.
When the set-point temperature is changed the controller will switch the well
heater on or off to raise or lower the temperature. The displayed well tempera-
ture will gradually change until it reaches the set-point temperature. The well
may require 5 to 10 minutes to reach the set-point depending on the span. An-
other 5 to 10 minutes is required to stabilize with ±0.1°C of the set-point. Ulti-
mate stability may take 15 to 20 minutes more of stabilization time.
14 Hart Scientific
5 Quick Start