PowerEntry Module (9107) - The power switch is located on the power entry
module(PEM). The PEM also houses the fuses.The supply voltage for the unit
is indicated on the PEM.
Serial Port- This D-9 connector is for interfacing the calibrator to a computer
or terminalwith serial RS-232 communications.
DisplayHold - The two terminals may be used to wire a switch or cut-ou tto
the calibrator to trigger the instrument to freeze the displayed well temperature.
Fuse Holders - At the rear of thecalibrator are two user accessable fuse
holders.
6.2 Front Panel
See Figure3 on page 16.
ControllerD isplay - The digitaldisplay is an important part of the temperature
controller because it not only displays set and actual temperatures but also vari-
ous calibratorfunctions, settings, and constants. The display shows tempera-
tures in units according tothe selected scale °C or °F.
ControllerKeypad - The four button keypad allows easy setting of the
set-pointtemperature. The control buttons (SET, DOWN, UP,and EXIT) are
used to set thecalibrator temperature set-point, access and set other operating
parameters, and access and setcalibration p arameters.
Setting the control temperature is done directly in degreesof the current scale.
It can be set to one-hundredth of a degreeCelsius.
The functionsof the buttons are as follows:
SET – Used to displaythe next parameter in the menu and to set parameters to
the displayed value.
DOWN– Used to decrement the displayed value of parameters.
16 HartScientific
6Parts and Controls
Set Down Up Exit
9105
Figure3 FrontPanel