Martel Electronics BetaGauge 3II - Manual (Page 28)

2-1 Modules
2- Input Modules
Overview
The BetaGauge II is a two-channel, multi-range
instrument. You can change ranges simply by plugging
in new input modules, and you may install or remove
modules even while the unit is powered up. The
calibrator automatically recognizes the module types
and displays the appropriate units.
There are two types of modules available for the
BetaGauge II:
 BetaPort–DC electrical modules
 BetaPort–P pressure modules
You may combine these two module types in the
following ways:
 One BetaPort–DC electrical module and one
BetaPort–P pressure module, or
 Two BetaPort–P pressure modules
WARNING
Do not simultaneously install two BetaPort–DC
electrical modules in the calibrator. The calibrator is not
designed to permit operation with two electrical
modules. Ground potential differences could cause high
current flows through the calibrator which could
damage the calibrator and/or cause bodily injury.