Pyramid T-1 Manual de usuario
T-1
Web-enabled Precision Hall Probe
User Guide
Pyramid Technical Consultants, Inc.
135 Beaver Street Suite 102, Waltham MA 02452 USA
US: TEL: (781) 402 1700 FAX: (781) 402-1750 EMAIL:
Europe: TEL: +44 1273 492002
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1 Contents
1
Contents .............................................................................................................................................................. 2
2
Introduction ........................................................................................................................................................ 4
3
What’s in the box? ............................................................................................................................................. 5
4
Safety Information ............................................................................................................................................. 6
5
Intended use ........................................................................................................................................................ 6
6
Operating environment ..................................................................................................................................... 6
7
Getting started .................................................................................................................................................... 7
7.1
Connecting the parts ....................................................................................................................................... 7
7.2
Connecting to a network.................................................................................................................................. 7
7.2.1
Connecting using a static IP address ...................................................................................................... 8
7.2.2
Connecting using DHCP address assignment ...................................................................................... 10
8
The web browser GUI ...................................................................................................................................... 13
8.1
Data display and controls ............................................................................................................................. 13
8.1.1
Sampling rate ....................................................................................................................................... 14
8.1.2
Measurement range .............................................................................................................................. 14
8.1.3
Zero offset ............................................................................................................................................ 15
8.1.4
Plotting control .................................................................................................................................... 15
8.1.5
Temperature ......................................................................................................................................... 15
8.1.6
Exporting data ...................................................................................................................................... 16
9
Making measurements ..................................................................................................................................... 18
9.1
Mounting the probe ....................................................................................................................................... 18
9.2
Cable length .................................................................................................................................................. 19
9.3
Sampling rate and measurement range ......................................................................................................... 19
10
Using your own software ................................................................................................................................. 22
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10.1
Example Python script to collect a specified number of readings from the T-1 ....................................... 22
10.2
Example Python script to display the field in large text ........................................................................... 24
11
Monitor output ................................................................................................................................................. 26
12
Utilities .............................................................................................................................................................. 29
12.1
Software updates ...................................................................................................................................... 29
12.2
Device name ............................................................................................................................................. 30
12.3
Rebooting .................................................................................................................................................. 30
12.4
Changing network settings ....................................................................................................................... 30
12.5
Accessing support ..................................................................................................................................... 31
13
Some background about magnetic measurements ........................................................................................ 32
13.1
Measures of Magnetic Field Strength ....................................................................................................... 32
13.2
Field vectors ............................................................................................................................................. 33
13.3
Rate of Change of Magnetic Flux Density ................................................................................................ 33
14
Fault-finding ..................................................................................................................................................... 35
15
Maintenance ..................................................................................................................................................... 38
16
Returns procedure ........................................................................................................................................... 39
17
Support.............................................................................................................................................................. 40
18
Disposal ............................................................................................................................................................. 41
19
Revision history ................................................................................................................................................ 42
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2 Introduction
Thank you for your purchase of the T-1 Precision Hall probe system. The T-1 allows fast and accurate
measurements of magnetic flux density from a compact and cost-effective unit. The active HP-1 probe is made from
non-conducting materials to eliminate eddy current effects and uses tightly twisted signal lines and differential
signals to give excellent noise immunity. An integrated sensor measures temperature right at the Hall element to
provide accurate temperature compensation of the field reading. The standard configuration of T-1 and HP-1 probe
allows fields up to +/- 28 kGauss (+/- 2.8 Tesla) to be measured at rates between 10 Hz and 25 kHz.
The T-1 control unit provides a standard network connection for control and readback to allow simple integration
into control systems. The analog voltage output can be used to monitor the measured field via a meter, oscilloscope
or digitizer.
Multiple T-1 units can be distributed to monitor magnetic field in multiple locations, and all communicate with a
supervising computer system. The T-1 has a web page interface allowing any standard web browser to display the
measurements. It is also easy to collect the data into your own software.
This User Guide provides the information you need to start making measurements with the T-1. More detailed
information is provided in the T-1 Technical Manual.
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3 What’s in the box?
Unless your order was for a special configuration, you should have received the items shown below. If anything is
missing or damaged, please contact your supplier.
T1 control unit
HP-1 active Hall probe
Connecting cable (part CAB-T1-6)
Ethernet cable
Universal power supply (part PSU24-25-1)
Calibration certificate and connection information sheet
USB drive with documentation and software
The line cord for the power supply can be selected to suit your local mains
connector type at time of order. The connector on the power supply end of the
cord is an IEC C7 two conductor type.
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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.
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7 Getting started
In order to read a magnetic field with the T1, you must assemble the components and then open
the web browser to see the readings.
7.1 Connecting the parts
1) Find the cable that joins the T-1 to the HP-1 probe and connect each end. There is a standard
9-pin DSub connector on the T-1 and a micro D connector on the probe.
2) Plug the line cord into the power supply (the green LED on the supply will illuminate) and
connect the threaded jack connector to the T-1. Connect to the line (110-240 VAC, 50-60 Hz)
and check that the white LED on the T-1 illuminates.
You are now ready to connect to a network.
7.2 Connecting to a network
The T-1 connects to a wired network using a standard Ethernet RJ-45 port. It needs an IP4
address on your network. IP4 addresses look like this: “192.168.100.123”, with each group of
numbers limited to the range 0 to 255. In typical local networks the first three groups of
numbers are the same and define a “subnet”.
The last group of numbers are available for devices on the local subnet. Since 0 and 255 are
reserved broadcasts and for devices like routers, that means the T-1 will need a number in the
range 1 to 254. There are two ways to set this up. “DHCP” (Dynamic Host Configuration
Protocol) is where a DHCP server on the network, usually a router, assigns an available address.
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This address is not fixed and may be changed by the router when the T1 makes a new connection
to the network. Static addresses on the other hand are set by the user and do not change. Static
addresses are more usual in technical networks.
The T-1 is normally supplied set up with a specific static IP address. This address is given on the
configuration sheet supplied with the unit. However, you can request a specific static address to
be set and enabled when you place your order. You can also change the address once you are
connected, or you can set the T-1 for DHCP address assignment.
7.2.1 Connecting using a static IP address
We recommend starting with the simplest communication setup. Make a direct connection from
a computer to the T-1 with a standard Ethernet patch cable.
Since there is no router in this setup, you will need to set the IP address of the computer. The
factory setting is shown on the connection sheet included with the product. If the static address
of the T-1 is 192.168.1.44 for example, choose a setting in the same subnet apart from .44. For
example, here are the Microsoft Windows dialogs for setting the computer to 192.168.1.100:
1. Edit the properties of the
Ethernet adaptor.
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2. Edit the TCP/IPv4 Properties
3. Select “Use the following IP
address” and enter the IP address.
Set the Subnet mask as shown.
Click “OK” and then “Close” to
close the dialogs and make the
new address effective.
If you look at the amber and green LEDs on the T-1 Ethernet port and the cable is connected,
you will see the amber light on and the green flickering when the T-1 is communicating. Now
open a web browser such as Chrome, Edge, Firefox, Safari and type the static address of the T-1
into the URL field. The T-1 will deliver its web page showing the measured field, a graph of the
field against time and various controls.
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7.2.2 Connecting using DHCP address assignment
The local network must have a router to use this method. Using a standard Ethernet patch cable,
connect the T-1 to the router or to a switch on the network.
Switch
Router
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