ThermoWorks 9141 HART SCIENTIFIC FIELD DRY-WELL TEMPERATURE CALIBRATORS - Manual (Page 18)

The display will begin to show the well temperature and the well heater will
start operating to bring the temperature of the well to the set-point temperature.
4.3 Power
Plug the dry-well power cord into a mains outlet of the proper voltage, fre-
quency, and current capability. Typically this will be 115 VAC (±10%), 50/60
Hz (230 VAC (±10%), 50/60 Hz). Turn the dry-well on using the rear panel
“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.
4.4 Setting the Temperature
Section 7.2 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 store 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 within ±0.1°C of the set-point. Ul-
timate stability may take 15 to 20 minutes more of stabilization time.
9141 Dry-well Calibrator
User’s Guide
14