Front Control Panel; Back Panel; Fluid Expansion Reservoir - Fluke 7341 User Manual

Front Control Panel

The following controls and indicators are present on the controller front panel (see Figure
7-1): (1) the digital LED display, (2) the control buttons, (3) the bath on/off power switch,
(4) the control indicator light, and (5) the cooling on/off switch.
1. The digital display is an important part of the temperature controller. It displays the
set-point temperature and bath temperature as well as the various other bath
functions, settings, and constants. The display shows temperatures according to the
selected scale units °C or °F.
2. The control buttons (SET, DOWN, UP, and EXIT) are used to set the bath
temperature set-point, access and set other operating parameters, and access and set
bath calibration parameters. A brief description of the functions of the buttons
follows:
•
SET - Used to display the next parameter in a menu and to set parameters to the
displayed value.
•
DOWN - Used to decrement the displayed value of parameters.
•
UP - Used to increment the displayed value.
•
EXIT - Used to exit from a menu. When EXIT is pressed any changes made to
the displayed value will be ignored.
3. The on/off switch controls power to the entire bath including the stirring motor.
4. The control indicator is a two color light emitting diode (LED). This indicator lets the
user visually see the ratio of heating to cooling. When the indicator is red the heater
is on, and when it is green the heater is off and the bath is cooling.
5. The cooling switch turns on the refrigeration for control below 50°C and rapid cool
down. The cooling shuts off automatically above 60°C. Manually turn off the
refrigeration at temperatures where it has been determined to be unnecessary. See
Refrigeration (Chapter 8), Cooling Mode (Chapter 9), and Hot Gas Bypass Mode
(Chapter 9).

Back Panel

On the back of the bath are the system fuses, power cord, high/low voltage indicator,
drain, serial port, IEEE-488 port (if installed), and the fluid expansion reservoir.

Fluid Expansion Reservoir

The fluid expansion reservoir is attached to the rear panel of the bath. Its purpose is to
Figure 7-1. Front Control Panel
7
Parts and Controls
Front Control Panel
haz003.eps
7-3