T1 Hall Probe System
T1 User Guide T1_UG_210314 Page 6 of 42
4 Safety Information
The T-1 and HP-1 probe are designed for compliance with harmonized electrical safety standard EN61010-1:2000.
They must be used in accordance with the specifications and operating instructions. Operators of the unit are
expected to be qualified personnel who are aware of electrical safety issues. The customer’s Responsible Body, as
defined in the standard, must ensure that operators are provided with the appropriate equipment and training.
The unit is designed to make measurements in Measurement Category I as defined in the standard.
The T-1 does not itself generate high voltages or magnetic fields. However, your
application may involve measuring high fields in electromagnets and high voltages
may present on electromagnet coils.
Take special care when making measurements where high fields or voltages are
involved.
The T1 must not be operated unless correctly assembled in its case. Only Service Personnel, as defined in
EN61010-1, should attempt to work on the disassembled unit, and then only under specific instruction from Pyramid
Technical Consultants, Inc. or their authorized distributors.
The T-1 unit is designed to operate from +24 VDC power, with a maximum current requirement of 250 mA. The
HP-1 probe is powered by the T-1. A suitably rated power supply module is provided.
When installed in a permanent location, the T-1 unit should be grounded by secure connection to a grounded
conducting surface. If the unit is mounted on an insulating surface, then one of the four mounting screws must be
re-assigned as a grounding connection. An adaptor for DIN-rail mounting is available.
5 Intended use
The T-1 is intended for magnetic flux density measurement, particularly in electromagnets in networked systems.
The field can be monitored at rates suited for real-time monitoring and field control. The probe design eliminates
magnetic materials or conducting surfaces that would distort the measurement of AC fields. The HP-1 probe is
particularly suited to measure the magnetic fields typical of ion beamlines which use conventional (non-
superconducting) electromagnets and has the range and precision to perform well in many general field
measurement applications. The probe is thin (less than 2.5 mm) but nevertheless stiff enough to allow it to be
placed at a known and stable location in the field.
6 Operating environment
The T-1 and HP-1 probe have design features which make them tolerant of electrically noisy environments, but the
place of use is otherwise assumed to be clean, sheltered and with a relatively small temperature range. The probe is
tolerant of a moderate radiation background such as might be found along a particle accelerator beamline.
The T-1 has good precision combined with low levels of drift and aging. Nevertheless, for maximum accuracy in
critical applications, the T-1 and probe should be re-calibrated every 1-2 years against a traceable reference.
