Martel Electronics BetaGauge 321A - Manual (Page 3)

1. Introduction
The Beta 311A/321A is designed to be a simple to use yet very versatile pressure
calibrator. Its two internal pressure sensors combined with inputs for mA, voltage, switch
contacts and an RTD probe allow the 311A/321A to calibrate virtually any pressure
device. An external pressure module option allows an even wider range of pressure
calibration options including absolute and differential.
The BetaGauge 311A is a single sensor pressure calibrator; the BetaGauge 321A is a
dual sensor pressure calibrator. The 311A uses the P1 port for all pressure inputs. The P2
port is only used on the model 321A. Therefore on the model 311A, all menu choices
involving pressure are limited to the P1 port only. All other model 311A features and
functions are the same as for the 321A.
1.1 Customer Service
Corporate Office:
www.martelcorp.com
e-mail: [email protected]
Tel: (603) 434-1433 800-821-0023 Fax: (603) 434-1653
Martel Electronics
3 Corporate Park Dr.
Derry, NH 03038
1.2 Standard Equipment
Check to see if your calibrator is complete. It should include: Beta 311A/321A Calibrator,
instruction manual, test leads, carrying case, calibration certificate with data.
1.3 Safety information
Symbols Used
The following table lists the International Electrical Symbols. Some or all of these symbols
may be used on the instrument or in this manual.
Symbol Description
AC (Alternating Current)
AC-DC
Battery
CE Complies with European Union Directives
DC
Double Insulated
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