14
4-6. Temperature
Compensation
Automatic Temperature Compensation (ATC) simulates a constant ambient temperature chamber for
materials which are normally subject to varying ambient temperatures. When the ATC mode is selected, the
temperature sensor (Options "AL" and "CU") automatically senses the ambient temperature and compensates
the reading to indicate what the actual resistance value would be in a controlled 20
°
C or 25
°
C environment.
The ATC mode is selected by pressing the Temperature Compensation On push- button. An LED positioned
directly above this push-button indicates that this mode has been selected. The temperature sensors are
connected to the 4300B via the front panel BNC connector. The temperature sensor may be extended with an
Option "CK" compensator extension cable. The FAULT indicator is illuminated when the ATC mode is
selected if the temperature sensor connections are not intact.
CAUTION: The housing of the compensator is electrically connected to the internal circuitry of the
instrument (ground), and to the V
LO
terminal. Care must be taken so that the housing does not contact
live circuitry.
