HPD 4.1 is a modular system for measurement of
magnetic field by means of Hall probes with high temporal resolution.
It consists of a system unit (enclosure, power supply), 1 to 4 Hall
probe modules, 1 temperature module and 1 communication module.
The system is mounted in a standard 19 inch rack. This driver is
primarily designed for magnetic field measurement in fusion research
(tokamaks, stellarators), but its application is much broader (industry, R&D).
Hall probe module 2301
The Hall probe
module was designed to supply one Hall probe with DC current up
to 200 mA and to measure input signal from the probe. The input
circuits involve precision input gain amplifier with the gain 1 to 10000,
high-pass 10 Hz filter and a programmable low-pass filter
with 4 cut-out frequencies (1 to 350 kHz). The output
signal is balanced manually, unbalanced signal is indicated by two
LEDs. The output signal is an analogue voltage signal proportional
to magnetic field, which is corrected by frequency filters. The
input signal connector (mixed D-sub) incorporates the signal from
PT100 temperature sensor. It is useful for simultaneous measurement
of the temperature near the magnetic sensor. All parameters can
be set either manually or remotely via a communication module.
Temperature module 2302
module enables to perform temperature measurements by means of PT100
sensor. The calibrated range is 0 to 100 °C (see
technical data). The input can be either direct (via insulated BNC
located on the temperature module) or via mixed D-sub input connectors
located on HPD modules. Each of the Hall probe modules can be used
for temperature measurements. The output signal is 10 mV/°C
and 0 V for 0 °C.
Communication module 2303
is available in multiple versions depending on the form of communication
protocol used between the master computer and HPD 4.1. Please, ask
the manufacturer for details.
Power supply module 2205
provides power supply to the entire system. Power status is indicated
by an illuminated green push-pull switch.