2.2
Electrical Information
2
SETUP
2.2
Electrical Information
The Compact 2A has several connectors located on the rear of the unit. A connection diagram is
provided for convenience.
Figure 2: Compact 2A Electrical Connection Information
Label
Description
1
Thermocouple Sensor Input
2
AC Input
3
Analog Output
4
Thermocouple Sensor Ground
2.3
Calibration
The Compact 2A controller provides a calibration adjustment to maximize the accuracy of each sen-
sor. The adjustment should be set at 1 mTorr. Maximum accuracy will utilize a 2A sensor and a
NIST traceable reference gauge co-located on a vacuum chamber. A controlled leak of dry nitrogen
is necessary for calibration. All Compact 2A controllers purchased with a 2A sensor will be factory
calibrated and there is no need for adjustment.
For calibration, pump the vacuum chamber down to below 1
×
10
−
4
Torr. Using the leak control
on the vacuum system, adjust the pressure in the chamber until the reference gauge reads 1 mTorr.
Then adjust the potentiometer located in the rear of the unit until the display shows 1 mTorr.
email: sales@frederickscompany.com
tel: +1 215 947 2500
web: frederickscompany.com
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