BARTINGTON INSTRUMENTS
Page 5 of 21 OM3224/4
4. CU1 Features
4.1. Front Panel
Figure 1. Front view of CU1 Control Unit.
Key
1. Current Control Output
4. Current Monitor Input
2. Auxiliary Input
5. ON/OFF power switch with LED indicator
3. Device Test Input
4.1.1. ON/OFF Power Switch with LED Indicator
The ON/OFF power switch [5] controls AC mains power to the CU1 Control Unit.
The LED indicator has two colour states (red or green) and is controlled by the user software.
4.1.2. Front Panel Connectors
Inputs
Auxiliary Input [2]:
this is a single ended or differential input, which can be that of a three-axis
magnetic field sensor.
Device Test Input [3]:
this is a single ended or differential input for a three-axis magnetic field
sensor to be tested. This sensor is also termed the Device Under Test (DUT).
Current Monitor Input [4]:
this is a differential input for monitoring the current in the Helmholtz
Coil. This should be connected to the Current Monitor Output of the PA1 Power Amplifier.
Auxiliary and DUT inputs are provided with a switchable, analogue, anti-aliasing filter which can
be enabled via a National Instruments acquisition card connected to the CU1.
Details of the pin-outs are available in DR3320.
Outputs
Current Control Output [1]:
this provides three differential analogue outputs to the PA1 Power
Amplifier which control the power to be applied to the Helmholtz Coil in order to generate and
regulate the required DC or AC magnetic field.
Details of the pin-outs are available on DR3320.
1
2
3
4
5
