Fluke 6050H User Manual page 34

6050H Calibration Bath
User's Guide
30
The bath is operable within the temperature range given in the specifications.
For protection against solid-state relay failure or other circuit failure, the mi-
cro-controller will automatically turn off the heater with a second mechanical
relay anytime the bath temperature is more than a certain amount above the
set-point temperature. As a second protection device, the controller is also
equipped with a separate thermocouple temperature monitoring circuit which
will shut off the heater if the temperature exceeds the cutout set-point.
The controller allows the operator to set the bath temperature with high resolu-
tion, set the cutout, adjust the proportional band, monitor the heater output
power, and program the controller configuration and calibration parameters.
The controller may be operated in temperature units of degrees Celsius or Fahr-
enheit. The controller is operated and programmed from the front control panel
using the four key switches and digital LED display. The controller may also be
optionally equipped with an RS-232 serial or IEEE-488 GPIB digital interface
(see Figure 5 on page 26) for remote operation. Operation of the controller us-
ing the front control panel is discussed in Section 9. Operation using the digital
interfaces is discussed in Section 10.
When the controller is set to a new set-point the bath will heat or cool to the
new temperature. Once the new temperature is reached the bath usually takes
10–15 minutes for the temperature to settle and stabilize. There may be a small
overshoot or undershoot of about 0.5°C.