operating instructions gaussmeter hgm09s

OPERATING
INSTRUCTIONS
GAUSSMETER HGM09S
Gaussmeter HGM09s Operating Instructions
Chapter 1
© 2010 Goudsmit Magnetic Systems
All rights reserved. No part of these operating instructions may be reproduced or duplicated without the author’s written consent.
We shall not be liable for the accuracy of these operating instructions nor for damages which can result from the use of this manual. Since mistakes can never be
avoided completely, despite all efforts, we would appreciate any given hint. We will
be anxious to correct any faults known to us as soon as possible.
Edition Note
Page 2 / 75
Data File
HGM09_Manual_DE_1_00
Doc. Date
29.06.2010
Hardware Status
VI
Software Status
290310
Current Documentation Status
1.00
Status of Documentation
Concerns Page(s) No.
01/2010
Compilation
Gaussmeter HGM09s Operating Instructions
Chapter 1
Table
Table of Contents
1
Safety Instructions
1.1 Safety Instructions for the Device
1.2 Safety Instructions for the Measuring Probes
1.3 Safety Symbols
2
Brief Introduction
2.1 Preparing a Measurement
2.2 Running a Measurement
2.3 Measuring Unit
2.4 Selecting the Measuring Range
2.5 Display
2.6 Status Display
3
Gaussmeter Function
3.1 The Hall Effect
3.1.1 Linear Properties of the Hall Probe
3.1.2 Non-linear Properties of the Hall Probe
3.2 Measurement Details
3.2.1 Sample Measurement with an NdFeB Magnet
3.2.2 Remanence and Hall Gaussmeter
Measurement
3.2.3 Accuracy Based on Positioning and Direction
3.2.4 External Static Magnetic Fields
4
Control Elements and Connections
4.1 Front Side Overview
4.2 Ports Overview
4.3 Power Supply
4.4 Batteries
4.4.1 Charging the Batteries
4.5 Probe Connection
4.6 USB Interface
5
Operation
5.1 Keyboard
5.2 Display
5.3 Status Display
5.4 Switching on/off
5.5 Null
5.6 Measuring Range
5.6.1 Overview Measuring Ranges
5.7 Measuring Unit
5.8 DC/AC Field Measurements
5.8.1 DC Field Measurements
5.8.2 AC Field Measurements
5.9 Peak Value Measurement
5.9.1 Normal Peak Value Recording
5.9.2 Fast Peak Value Recording
5.10 Probe Data
6
Setup Menu
6.1 Settings
5
5
6
6
7
7
7
8
8
9
9
10
10
10
11
13
13
14
15
16
17
17
17
18
18
19
20
20
21
21
22
22
24
24
25
25
26
26
27
28
30
30
31
33
34
35
6.1.1 Operating Mode of the USB Interface
6.1.2 Selecting the Display Units
6.1.3 Operating Mode of the Peak Value Recording
6.1.4 DC/AC Field Measurement
6.1.5 Range Selection
6.1.6 Polarity Display (North/South)
6.1.7 Switching off the Device
6.1.8 Charging the Batteries
6.1.9 Brightness of Display Illumination
6.1.10 Display Contrast Adjustment
6.1.11 Version Remarks
7
Serial Interface
7.1 Introduction
7.2 Connecting the Gaussmeter to a Computer
7.2.1 Connector Plug
7.3 Direct Operation on the Computer
7.3.1 Example Normal Measuring Mode in Excel
7.3.2 Example Fast Peak Value Mode in Excel
7.3.3 Example Slow Peak Value Mode in Excel
7.4 Operation via Interface
7.4.1 Installation on the Computer
7.4.2 USB Interface Data Format
7.4.3 Character Set
7.4.4 Introduction to the SCPI Language
7.4.5 SCPI Data Types
7.4.6 The SCPI Status Model
7.5 Summary of SCPI Commands
7.5.1 Control Commands
7.5.2 Main Commands
7.5.3 Peak Value Functions
7.5.4 Probe Functions
7.5.5 Parameters
7.5.6 Device Functions
7.6 Explanation of the Individual SCPI Commands
7.6.1 Control Commands
7.6.2 Main Commands
7.6.3 Peak Value Function
7.6.4 Probe Functions
7.6.5 Parameters
7.6.6 Device Functions
8
Unit Conversion Table
9
Technical Data
10 Declaration of Conformity
11 Warranty and Copyright
12 Index
35
35
36
36
37
37
37
38
38
38
39
40
40
41
41
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42
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42
43
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Page 3 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 1
Table of Illustrations
Display
9
Front Side
17
Basic Assembly of a Hall Probe
10
Ports
17
Battery Box
18
Display
22
USB Connection
41
SCPI Status Model
49
Flux Line Characteristics of NdFeB
Induction Disks
13
Field Strength Pattern of NdFeB
Induction Disk
Page 4 / 75
14
Gaussmeter HGM09s Operating Instructions
Chapter 1 Safety Instructions
1 Safety Instructions
1.1 Safety Instructions for the Device
Use the measuring instrument only according to the user manual.
Do not replace any parts and do not make any modifications on the product without our explicit and written consent. Do not carry out any service measures at this
device. For repair and maintenance please return the product to Goudsmit Magnetic Systems or to your supplier, in order to make sure that all safety features remain.
Handling malpractices may result in damage to the device and possibly in injury or
death of persons.
The power supply is designed for a voltage range of 100 to 240VAC at 47 to
63Hz. Do not use the power supply on voltages beyond these areas.
Before use, check the power supply for cracks or missing plastic parts. Pay attention
to the insulation. Do not use the power supply if it is damaged.
Do not dispose of the measuring device in normal household garbage. Please contact the manufacturer for the proper disposal of this instrument.
Only use magnetic field probes designed for this measuring device.
Observe the labeling of this measuring device before connecting a magnetic field
probe to it.
Replace the rechargeable batteries only by batteries of the same type.
Make sure to insert the rechargeable batteries correctly into the measuring device
and mind the correct polarity.
Do not dispose of the rechargeable batteries in the regular household garbage.
Heed your national regulations for the disposal of old batteries.
Do not work in explosive environs or near inflammable gases or vapors with this
device.
Environmental conditions
The device is designed for the use in rooms with low condensation. See technical
data.
Page 5 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 1 Safety Instructions
1.2 Safety Instructions for the Measuring
Measuring Probes
The magnetic measurements should only be carried out in areas with a max. voltage of 60V DC, 30V AC RMS. The magnetic field probes are not electrically insulated. Please note that the probe holders and the housing might be electrically connected with the protective earth.
If you work in areas with voltages higher than 60V DC, 30V AC RMS or 42V peak
values, act with particular caution because of electric shock hazard.
For measurements in high magnetic fields, please pay attention to the dangers that
may arise by strong magnetic fields.
1.3 Safety Symbols
Safety symbols can be found on various spots on the device.
Before using this connection or function read the corresponding instructions
in the manual.
This symbol refers to information and references in the instruction manual
which the user has to follow in order to avoid injuries to persons or damage
to the device, or to obtain correct measuring results.
Page 6 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 2 Brief Introduction
2 Brief Introduction
Measurements with the gaussmeter use the Hall effect as a measuring principle. A
Hall probe is a symmetric semiconductor impressed by current. A magnetic field
running vertically to this element generates an asymmetry on the chip and thereby
creates an output voltage that, as a first approximation, is proportional to the product of magnetic field strength and the forced current. For higher magnetic field
strengths this dependency is no more linear. This effect is automatically compensated in the device. The gaussmeter thus measures the magnetic flux density locally.
The sensor only captures the component of the magnetic flux density which runs
perpendicularly through it.
2.1 Preparing a Measurement
•
•
Make sure that the batteries are loaded.
Connect the device to a personal computer via the USB cable if required. Or
connect the included power supply via the USB socket.
•
Connect a measuring probe.
A suitable measuring probe can be plugged in via the Mini-DIN socket on the
top of the device. Each measuring probe is calibrated individually. The calibration data are stored in the probe memory. On inserting or changing a measuring probe these parameters are read in automatically.
•
Switch the device on and off by pressing the I/O button longer (approx. 2 sec).
2.2 Running a Measurement
After switching on the device, the current measuring value is shown continuously.
The display additionally shows further information on the state of the device and the
selected measuring range as well as the measuring mode.
•
The measuring range can be changed by pressing the RANGE button. The
characteristics of this button can be modified in the setup menu. By repeatedly
pressing the RANGE button both the measuring range and the display unit or
the DC/AC field measurement can be changed.
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Gaussmeter HGM09s Operating Instructions
Chapter 2 Brief Introduction
•
Insert the measuring probe into the measuring field after adjusting the requested measuring range and the requested unit. Especially for inhomogeneous
magnetic fields, such as they occur on the surface and edges of magnets, keep
in mind that the measured magnetic flux density depends very largely on the
distance and the position. Further pay attention that the magnetic field component is measured in one direction only, so that a tilting of the measuring probe
may lead to an error.
2.3 Measuring Unit
The gaussmeter shows measuring values in physical units of the SI-system as well as
of the CGS system (Gauss system – particularly in use in North America).
The unit is either definitely preset in the setup menu or you can adjust it by pressing
the RANGE button. Each time you press the button the next unit is selected.
Please note that the same button selects the measuring range and the DC/AC field
measurement, if necessary.
2.4 Selecting the Measuring Range
By repeatedly pressing the RANGE button, you select the measuring range via four
areas each. The maximum measuring value in this area is shown in the bottom left
area of the display. You can also select an automatic range mode via the setup
menu. In this operating mode, the measuring range is automatically aligned with the
current measurement. Please note that no automatic range adjustment is possible in
the peak mode.
If the measuring value exceeds the selected range limit, the display
shows -OL- instead of the measuring value.
Page 8 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 2 Brief Introduction
2.5 Display
A typical example display is demonstrated below.
USB Status
Battery Status
Unit
Measuring Value
Measuring Range
Operating Mode
Figure 1 Display
2.6 Statu
Status Display
In addition to showing the current measuring value, the gaussmeter display also
shows the status information, a negative or positive peak value, if required, and the
state of the USB interface as well as the charging status of the battery.
Page 9 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
3 Gaussmeter Function
3.1 The Hall Effect
3.1.1 Linear Properties of the Hall Probe
The measurement is based on the diflection of charge carriers in a magnetic field inside a conductor. For this reason the Lorentz force is the basis for measuring a magnetic flux density. If you set a voltage between the beginning and the end of a flat
r
r
electrical conductor, the carriers move with a speed of vDrift = µ n ⋅ Ee , whereby µ n
represents the carrier mobility in the conductor. Due to their high mobility, the carriers are always electrons. Perpendicular to the current direction, a voltage can be
measured that is ideally proportional to the magnetic flux density. Only the part of
the flux density is effective which runs perpendicularly through the flat side of the conductor.
B
S2
C2
C1
S1
Figure 2 Basic Assembly of a Hall Probe
If you do not extract any current from the electrodes S1 and S2, but only measure the
voltage, the following applies:
ne ⋅ e ⋅
Page 10 / 75
U Hall
I
=
⋅B
w
w⋅t
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
It follows that:
With
U Hall =
I 1
⋅ ⋅B
ne ⋅ e t
ne
Carrier
e
Elementary charge of the electron (1.6022x10-19 As)
w
Width of the path on which the electrons move
t
Effective force of the Hall element
B
Flux density in [Tesla]
This represents the idealized Hall effect.
In reality, the results deviate from this idealized effect.
Since there is a linear equation between the current and the measuring result, it follows
that
RHall =
1
⋅ B = S0 ⋅ B
ne ⋅ e ⋅ t
3.1.2 NonNon-linear Properties of the Hall Probe
Contrary to the idealized description you find a non-linear performance:
(
)
RHall = S0 ⋅ B ⋅ 1 + α HALL ⋅ B 2 + Roffset
For the used Hall probes the real description is true for flux densities of up to approx.
5000 mT.
3.1.2.1 Reasons for the Occurrence of Roffset
The largest deviation from the idealized Hall effect is the occurrence of an offset voltage without a magnetic field. This effect is mainly caused by geometrical asymmetries of the Hall element.
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Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
3.1.2.2 Reasons for the Field Dependence
Dependence of the Sensitivity
There are several influences for the flux-density dependence of the sensitivity:
The carrier mobility depends on the flux density. This influence generally brings about
a negative αHall and is irrelevant for the used Hall sensors.
More important is the geometry of the used Hall sensors. The lamellar structure creates a geometry-based field dependence of the sensitivity.
The non-homogeneous distribution of the current density in such a structure is the
cause of this effect.
Already in field-free cases, the current distribution on the Hall element is complex.
This entails a lowering of S0 and has an influence on the field dependence of the
sensitivity.
A complex real-time correction of the handheld gaussmeter HGM09 compensates for
the inherent non-linearities of the used Hall probes and guarantees a very stable
zero point.
3.1.2.3 Field Dependence
Dependence of the Cross Current Resistance
The complex current distribution is the cause of the resistance of a Hall probe. Current components which, just as the Hall voltage, run perpendicularly to the direction
of the current feed, cause a diverted Hall effect. For the current source this effect results in a flux density modulated resistor.
The device must have a sufficiently high dynamic for the measurement with fast magnetic pulses, to be able to compensate this effect. The handheld gaussmeter HGM09
is optimized for this operating case.
3.1.2.4 Temperature Dependence
Dependence of the Sensitivity
Due to the large band gap of the used Hall sensors, the temperature dependence of
the probe sensitivity is low, it is approx. -0.06%/ºC.
3.1.2.5 Temperature Dependence
Dependence of the Cross Current Resistance
The temperature dependence of the cross current resistance ranges at approx.
0.3%/ºC and is compensated automatically by the device.
Page 12 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
3.2 Measurement De
Details
The used Hall probes contain a very small active semiconductor area ranging at approx.
100µm. The local resolution of this measuring method is thus rather high. Also note that
individual Hall probes measure one field component only.
3.2.1 Sample Measurement with an
an NdFeB Magnet
Due to the high local resolution, the near-surface measurement with magnets may lead
to misinterpretations because of the large field-strength gradients.
Figure 3 Flux Line Characteristics of NdFeB Induction Disks
Figure 3 shows an NdFeB magnet with a material remanence of 1400mT. In this example the magnetic disk has a thickness of 5mm with a diameter of 20mm. The magnet is
supposed to be measured in 1mm distance from the surface.
Page 13 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
Figure 4 Field Strength Pattern of NdFeB Induction Disk
The diagram in Figure 4 represents the measurement with a Hall probe which is moved
in parallel to the surface of the magnet with a distance of 1mm distance to the measuring surface.
A minimum of the flux density emerges in the center of the magnet. Here approx.
230mT are measured. Due to the locally changing working points on the radius of the
magnet, the flux density increases toward the outside. In the center the magnet carries
the highest magnetic load in air and therefore provides the lowest flux density.
3.2.2 Remanence and Hall Gaussmeter Measurement
The remanence Br is a measure for the aligned magnetic dipoles in the center of the
magnet. Br is the theoretically maximal flux density that can be achieved if the magnet is
in magnetic idle. If it works against a magnetic resistance, it is always B < Br.
On the surface of an individual magnet B < Br /2 applies even more.
Which value is actually measured in the pole center depends on the geometry of the
magnet.
Page 14 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
As Br as well as B are measured in the unit Tesla, the magnetic field measured on the
outside is often mixed up with the remanence.
Please note that a magnet without back iron only shows a value clearly below the reremanence on the surface. Due to the local and geometry-dependent measurement, the
remanence of the workpiece cannot be checked reliably with a gaussmeter.
3.2.3 Accuracy Based on Positioning and Direction
Since the measuring value is dependent on the position, an accurate and repeatable
measurement depends on the exact positioning of the probe during the measurement.
The measurement on the pole center of the magnet is most uncritical. When moving the
probe on the pole surface of the magnet, the measuring value hardly changes at first.
When changing the distance though, the measuring value varies considerably.
The smaller the magnet to be measured, the stronger even
even slight misalignments
change the measuring value. For quality-related research it is essential to ensure the
positioning accuracy.
Since a Hall probe only records one field strength vector, the correct alignment relative
to the magnet is important.
Please be particularly careful when measuring at the zero point at pole transitions. By
slightly tilting the probe, you measure additional lateral field shares that seem to displace the zero passage.
In normal applications, a maximum flux density value is usually determined at a given
position. The measuring probe is placed in position and varied in location and direction
until the maximum is found. The device supports this measurement with the peak hold.
Page 15 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 3 Gaussmeter Function
3.2.4 External Static Magnetic Fields
Particularly in sensitive measuring ranges, an external static magnetic field, as e.g. the
Earth’s field, can already become clearly noticeable. These external magnetic fields lead
to a corruption of the measuring result.
To compensate external magnetic stray fields or asymmetries of the Hall probe, the device can be reset.
For this purpose please hold the measuring probe into a field-free area, e.g. a zero
Gauss chamber, or orient the measuring probe in a free field in east-west direction and
press the NULL button for approx. 3 seconds. The device then carries out a null balance
automatically.
The values are stored so that this balancing has to be carried out only in seldom cases.
If the magnetic field is too high during the automatic balancing, the correction is stopped
with an error message.
Page 16 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 4 Control Elements and Connections
4 Control Elements and Connections
4.1 Front Side Overview
1
2
3
4
5
Display
RANGE button
NULL button
DATA button
IO button
Range selection
Reset
Data recording
On/Off
Figure 5 Front Side
4.2 Ports Overview
Figure 6 Ports
1 PROBE
2 USB
Port for the probe
Port for computer or power supply
Page 17 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 4 Control Elements and Connections
4.3 Power Supply
The gaussmeter can be operated with the included power supply. The power supply
is connected via the USB port (type Mini-B) on the top of the device. The power
supply is designed for a line voltage of 100 to 240V alternating current 50-60 hertz
at a charging rate of max. 300mA. Use the power supply only when both the device itself and the connector cable obviously do not show any damages.
4.4 Batteries
The device is designed to operate with rechargeable batteries, type NiMH
2450mAh AA PK4. Alternatively the device can also operate with standard NiMH
batteries of the same voltage and similar capacity. Only use the identical battery
type if a change is necessary. Only change both batteries at the same time.
To insert or remove batteries, separate the device from the measuring probe and
remove the cables from the USB plug. Switch off the device. Remove the protective
cover and carefully open the battery box on the bottom side of the device. Mind the
correct inserting position when exchanging the batteries. Mind the correct polarity.
Normally old batteries must not be disposed of in the regular household garbage.
Protect your environment and heed your national waste disposal regulations for old
batteries.
Figure 7 Battery Box
The normal operating time with fully loaded batteries is approx. 10 hours. You can
prolong this time by selecting a darker backlight. You can adjust the brightness in
the parameter menu. Moreover, you can activate the automatic switch-off. The device switches off automatically after 2 or 5 minutes, if no button is pressed and the
measuring value does not change significantly.
Page 18 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 4 Control Elements and Connections
4.4.1 Charging the Batteries
The battery is charged via the power supply during operation or when connected to
a personal computer. The top right edge of the display shows the battery charge
condition.
Please note that the batteries are only charged when the device is switched on or
when it remains connected to the power supply or personal computer after switching off. The top right edge of the display shows the battery charging status.
Note
The device does not charge automatically when you feed it via the
power supply and do not switch it on.
You can also avoid the charging by pressing the IO button in charging state once
again and hereby finally switch off the device.
In the setup menu you can manually deactivate the battery charging. This might become necessary if your personal computer cannot provide the required charging
current. The interconnection of an active USB hub might help if such a problem occurs. Please note that this hub must however possess its own power supply.
Page 19 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 4 Control Elements and Connections
4.5 Probe Connection
The magnetic measuring probe is plugged into the probe port (DIN Mini-DINsocket) on the top of the device.
Note
Only use measuring probes which are approved by the manufacturer
to operate with this device.
Note
The probe plugs must not be connected to the electric potential, the
protective conductor or the plug shell. If you measure near current
conducting parts, make sure that there is sufficient distance and a sufficiently good insulation.
4.6 USB Interface
The transmission of the measuring values and the entire gaussmeter control
are possible via the installed standard USB interface.
The interface is specified according to the USB (Universal Serial Bus) 2.0.
The interface is not insulated. Please note that the shielding of the measuring probes (e.g. the metallic handle) might be connected to the protective
conductor of your personal computer via this USB interface.
The device supports two USB device classes. On the one hand the HID
class. In this mode the data can be entered directly into any program. The
gaussmeter acts similar to the keyboard of a personal computer.
On the other hand, the device can be operated in the USB device class
CDC and thereby emulates a virtual serial interface on the personal computer or another processor. In contrast to the HID mode, the installation of
a driver on the processor becomes necessary here.
Via the virtual serial interface all functions and parameters of the device
can be set using the SCPI command, and the measuring values can be
read out automatically.
Page 20 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5 Operation
5.1 Keyboard
The required functions are selected and triggered via 4 buttons. The labeling of the
button corresponds to the requested function, e.g. RANGE changes the range of the
measuring value.
More complex parameter settings can be made via menu functions in the setup menu.
The button functions in detail:
With this button you change the measuring range, the measuring unit
and the measuring mode (DC or AC fields). The exact function of this button depends on the settings in the setup menu. Further explanations, see
there.
Via NULL the displayed peak value is set to zero in the peak value measuring mode.
If you press the button for approx. 3 seconds, the magnetic offset values
are compensated.
In the USB operating mode HID (keyboard) the current measuring values
are transmitted to the connected processor and can be entered into any
program.
This button has no function in the other operating modes. In the USB operating mode CDC (virtual interface), pressing this button can be read out
via an SCPI command.
To switch the device on and off, press the button for approx. 2 seconds.
If you press the button longer when switching on, the setup menu is called
up.
Page 21 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.2 Display
A typical display example is shown below.
USB Status
Battery Status
Unit
Measuring Value
Range
Operating Mode
Figure 8 Display
5.3 Statu
Status Display
The top right area displays the battery charging status.
Apart from the measuring value the display shows some status information.
Page 22 / 75
Battery fully charged.
Residual capacity approx. 75%
Residual capacity approx. 50%
Residual capacity approx. 25%
Battery almost empty. Immediate charging required.
Battery status is determined.
Battery defective.
Battery charging.
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
Interface
Measuring
Range
Operating
Mode
The device is connected to the computer via a virtual interface.
The device is connected to the computer as a keyboard
simulation. In this mode, the gaussmeter acts like a keyboard. Pressing the DATA button causes the transmission of
the current measuring values to the selected program.
An internal error has occurred. Detailed error notes are
given on quitting the setup menu.
The bottom left area of the display shows the currently selected measuring range with the currently selected unit.
The equals sign to the right stands for DC field measurements.
The shift sign to the right stands for AC field measurements.
Peak in the bottom part shows the operating mode FastPeak-Registration, thus the fast recording of the maximum
values of DC fields.
The display Peak with two measuring values in the penultimate line shows the
two maximum and minimum measuring values determined during the slow
peak value registration.
The current measuring value is 109.5mT,
the smallest peak value was -112.2mT,
the highest peak value was +109.5mT.
Page 23 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.4 Switching on/off
The device is switched on and off with the right bottom IO button. In
each case the button must be pressed for approx. 1 second. This avoids
an accidental switching on and off.
If the batteries are not yet fully charged during switch off, the charging
continues also after switching off. You can see this in the top right battery display. By
pressing the ON and OFF button once again, the device is finally switched off.
During activated automatic switch-off, the device is turned off after 2 or 5 minutes
without any activity.
5.5 Null
Null
During the peak value measurement the stored minimum and maximum
values are reset by briefly pressing the NULL button.
To compensate external magnetic fields, press the NULL button for
approx. 3 seconds. The device then carries out an automatic null
balance. During the null balance the text NULL SET is displayed. The null
balance roughly takes 4 seconds. To avoid fatal errors, this process is interrupted by
the error message OVERFLOW, if the adjacent external field is larger than 10% of the
respective measuring range.
Note
Only carry out the null balance in a preferably field-free area.
Operation via the external interface:
:PEAK:NULL
Reset peak values
:NULL
Carry out null balance
Page 24 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.6 Measuring Range
.
The gaussmeter has 4 measuring ranges. The range limit value is shown
at the bottom left of the display. The range limit values depend on the
ranges themselves and on the selected measuring unit. The ranges can
be switched manually or automatically. Regarding the manual switch, the
measuring range is selected by multiple pressing of the RANGE button.
The automatic range selection mode is set via the setup menu, followed by the parameter Range off manually.
With automatic range selection activated, the device switches to an insensitive range
if the measuring value has exceeded 90% of the actual measuring range. A sensitive
range is selected when the measuring value falls below 10% of the actual measuring
range.
Operation via the external interface:
:RANG:SET {0|1|2|3}
Manual setting; 0 = most sensitive area
:RANG:AUTO
Automatic setting
5.6.1 Overview Measuring Ranges
DC Field Measurement
Range Limit
Resolution
AC Field Measurement
Range Limit
Resolution
Fast Pulse Measurement
Unit
Range
Range Limit
Resolution
Tesla
1
10 mT
1 µT
10 mT
10 µT
10 mT
10 µT
T
2
100 mT
10 µT
100 mT
100 µT
100 mT
100 µT
3
1000 mT
100 µT
1000 mT
1 mT
1000 mT
1 mT
4
4500 mT
1 mT
3000 mT
10 mT
4500 mT
10 mT
Ampere/m
1
10 kA/m
1 A/m
10 kA/m
10 A/m
10 kA/m
10 A/m
A/m
2
100 kA/m
10 A/m
100 kA/m
100 A/m
100 kA/m
100 A/m
3
1000 kA/m
100 A/m
1000 kA/m
1 kA/m
1000 kA/m
1 kA/m
4
3800 kA/m
1 kA/m
2500 kA/m
10 kA/m
3800 kA/m
10 kA/m
Gauss
1
100 G
10 mG
100 G
100 mG
100 G
100 mG
G
2
1000 G
100 mG
1000 G
1G
1000 G
1G
3
10 kG
1G
10 kG
10 G
10 kG
10 G
4
45 kG
10 G
30 kG
100 G
45 kG
100 G
Oersted
1
100 Oe
10 mOe
100 Oe
100 mOe
100 Oe
100 mOe
Oe
2
1000 Oe
100 mOe
1000 Oe
1 Oe
1000 Oe
1 Oe
3
10 kOe
1 Oe
10 kOe
10 Oe
10 kOe
10 Oe
4
45 kOe
10 Oe
30 kOe
100 Oe
45 kOe
100 Oe
Page 25 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.7 Measuring Unit
You select the requested measuring unit by pressing the RANGE button.
The function of the RANGE button depends on the setting of the setup
menu under Units.
The measurement is carried out either in the unit Tesla, Gauss, kA/m or
in Oersted. The display shows the selected measuring unit. The respective range limit value changes according to the selected measuring unit.
This is shown in the bottom left display area.
Also see the measuring ranges overview.
Operation via the external interface:
:UNIT {TESL|APM|GAUS|OE}
5.8 DC/AC Field Measurements
With the gaussmeter you can carry out both DC field measurements
(typical for permanent magnets) and AC field measurements (typical for
transformers and similar components). You can moreover record fast
single impulses.
Select the measuring mode via RANGE or via the corresponding entry in
the setup menu.
Operation via the external interface:
:MODE {DC|AC}
Page 26 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.8.1 DC Field Measurements
When measuring DC fields, the gathered measuring values are integrated via a time
interval of 100 milliseconds. Influences of AC magnetic fields are thereby suppressed. This applies especially for interspersions of the AC network with a net frequency of 50 to 60 hertz.
The measuring values are emitted with positive or
negative signs respectively.
Alternatively, the magnetic field polarity can also be
displayed to (north/south). You can choose this by
selecting the item POLE DISPLAY in the setup menu.
Operation via the external interface:
:MODE DC
5.8.1.1 DC Field Measurement Characteristics
Field Strength
Accuracy (1σ)
≤ 1.5 T
±0.5 %
> 1.5 T
±1.0 %
Page 27 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.8.2 AC Field Measurements
In the operating mode AC field measurement the
effective value (RMS) is calculated from the
determined AC field shares. DC field shares are
automatically suppressed in this type of measurement.
Note
Please note that superimposed DC field shares must not be so large
that they exceed the measuring range. A small AC field together with
a DC field may result in a display overflow.
Operation via the external interface:
:MODE AC
The accuracy of the AC field measurement depends on the AC field‘s frequency and
wave shape.
5.8.2.1 AC Field Measurement Characteristics
Maximum ratings for sinusoidal signal
Frequency
Beff
Accuracy (1σ)
≤2 kHz
≤1 T
≤±1.0 %
≤5 kHz
≤2 T
≤±2.0 %
The error of the AC field measurement is composed of the error of the DC field
measurement and the error of frequency and shape factors.
Error DC Field Measurement (1σ)
Page 28 / 75
B ≤1.5 T
≤±0.5 %
B ≥1.5T
≤±1.0 %
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
Frequency Response Factor (Sinusoidal Field Pattern)
Frequency
Factor
2 kHz
1.00
5 kHz
0.98
7 kHz
0.95
10 kHz
0.90
Shape Factor (Sinusoidal Field Pattern)
Field Strength Beff
Factor
700 mT
1.00
1000 mT
1.01
1500 mT
1.02
2000 mT
1.03
The frequency response factor and shape factor are multiplied with the basic accuracy in dependence of the respective measuring parameters, and then added to the
basic accuracy.
Example:
Measuring Beff = 1000 mT at a frequency of 5 kHz.
The basic accuracy is 0.5%. The frequency response factor is 0.9%. The shape factor
is 1.02.
The error from of these factors is 0.95 * 1.02 = 0.97 = -3%
For the measurement you have to calculate a total error of -3%±0.5%.
Page 29 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.9 Peak Value Measurement
The device has 2 different operating modes for measuring peak values. They differ in
speed, evaluation and resolution.
5.9.1 Normal Peak Value Recording
For the normal peak value recording of minimum and
maximum values the displayed measuring value is
analyzed continuously and the lowest or respectively
highest value are determined from it.
In this operating mode approx. 10 measurements per
second are carried out in high resolution. This enables
recordings of slowly changing field sizes. A typical application is the determination of
a maximum field strength value of a permanent magnet by manual positioning of the
measuring probe on the surface.
Reset the value via the NULL button.
The automatic range selection cannot be used in this operating mode.
The accuracy corresponds to the DC field measurement.
Operation via the external interface:
:PEAK:MODE SLOW
Page 30 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.9.2 Fast Peak Value Recording
The fast recording of the maximum values of DC
fields is required for short magnetic impulses, as they
are generated in e.g. magnetizing systems.
In this operating mode you record peak values of the
magnetic field starting from a duration of 10µs. The
display shows the absolute highest amount.
Reset the value via the NULL button.
The automatic range selection cannot be used in this operating mode.
Note
Please note that in sensitive measuring ranges magnetic AC fields
caused by e.g. transformers or electric lines might lead to a measuring
value. Normally, these values would not be noticed during normal operation, because disturbances with a net frequency of 50 or 60 hertz
are filtered out.
Operation via the external interface:
:PEAK:MODE FAST
5.9.2.1 Fast Peak Value Measurement Characteristics
Maximum ratings for the fast peak value measurement
Range
≤±1.0 %
≤±2.0 %
10 mT
≤70 Hz
≤100 Hz
100 mT
≤100 Hz
≤150 Hz
1T
≤300 Hz
≤500 Hz
4.5 T
≤500 Hz (B <1.5T)
≤700 Hz
Page 31 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
The error of the fast peak value measurement consists of the error of the DC field
measurement and of a frequency factor that depends on the measuring range.
Error DC Field Measurement (1σ)
B ≤1.5 T
≤±0.5 %
B ≥1.5T
≤±1.0 %
Range-Depending Frequency Response Factor (Sinusoidal Field Pattern)
Measuring Range
4500 mT
1000 mT
100 mT
10 mT
Frequency
1.00
1.00
1.00
1.00
50 Hz
1.00
1.00
1.00
0.99
70 Hz
1.00
1.00
0.99
0.98
100 Hz
1.00
1.00
0.98
0.93
200 Hz
1.00
1.00
---
---
500 Hz
0.99
0.99
---
---
700 Hz
0.99
0.98
---
---
1000 Hz
0.98
0.98
---
---
2000 Hz
0.92
---
---
---
The range-depending frequency response factor is multiplied by the basic accuracy,
depending on the respective signal frequencies and then added to the basic accuracy.
Example:
Measurement in the range of 1000mT with a frequency of 1kHz.
The basic accuracy lies at 0.5%. The frequency response factor is 0.98 = -2%.
During this measurement, you have to calculate a total error of -2%±0.5%.
The frequency response factor as well as the shape factor are multiplied by the basic
accuracy depending on the respective measuring parameters and then added to the
basic accuracy.
Page 32 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 5 Operation
5.10 Probe Data
For a correct measurement the gaussmeter must always know the necessary probe
data. The connected probes contain a parameter memory which stores the probe parameters, the serial number and the labeling. After changing the probe or switching
on the device these data are read in automatically.
Page 33 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 6 Setup Menu
6 Setup Menu
You can change the device setup via the setup menu and hence adapt the
device to the measurement task in an optimal way. By holding the IO
button after switching on, the setup menu appears on the display.
During operation you can also activate the setup menu by holding the
RANGE button for approx. 3 seconds.
The setup menu displays the selected menu item inversely. The
individual menu item can be selected by the NULL
and
buttons. On reaching the bottom or first line the
RANGE
menu entries are scrolled further down or up respectively.
You can change the selected menu item by pressing the DATA
button. The individual possibilities are displayed one after the other. Quit the setup menu by clicking
button.
the IO
Page 34 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 6 Setup Menu
6.1 Settings
The following setup possibilities can be adapted individually in order to be able to use the device for
each application in an optimal way:
6.1.1 Operating Mode of the USB Interface
OFF
Switched off
The data connection is cut off. The
device can however still be supplied
with voltage via the USB connector.
COMPU
COMPUTER
Virtual serial connection
The interface is activated and the
computer can operate the device
and read out the measuring values
via the SCPI protocol.
KEYBO
KEYBOARD
Keyboard emulation
The device acts similar to a keyboard of a connected computer. The
data are transmitted after pressing
the DATA button.
Operation via the external interface:
:PAR:USB {OFF|KEYB|COMP}
6.1.2 Selecting the Display Units
GAUSS
Display unit Gauss
KA/M
Display unit kA/m
TESLA
Display unit Tesla
OERSTED
Display unit Oersted
SCROLL
All units can be selected by multiple pressing of the RANGE
button.
Operation via the external interface:
:PAR:UNIT {ALL|TESL|GAUS|OE|APM}
Page 35 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 6 Setup Menu
6.1.3 Operating Mode of the Peak Value Recording
OFF
Switched off
The peak value
switched off.
FAST
Fast recording of max.
values
The absolute higher peak value of
the measuring value is recorded all
20µms. An automatic range switch
is not possible. Only for DC field
measurements.
SLOW
Slow recording of min.
and max. values
The peak measuring values are recorded and displayed all 100ms.
An automatic range switch is not
possible. Only for DC field measurements.
recording
is
Operation via the external interface
:PAR:PEAK {OFF|SLOW|FAST}
6.1.4 DC/AC Field Measurement
BOTH
Manual selection via
the RANGE Button
AC~
AC field measurements
Measuring the AC field.
DC=
DC field measurements
Measuring the DC field. The peak
value measurement is only possible
for DC field measurements.
Operation via the external interface
:PAR:ACDC {BOTH|DC|AC}
Page 36 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 6 Setup Menu
6.1.5 Range Selection
MANU
MANUALLY
Manual range selection
via the RANGE button
AUTO
Automatic range switch
at the range limits
The switch is made at > 90%
and < 10% of the measuring
range. For peak value measurements the automatic range
switch is not possible.
Operation via the external interface
:PAR:RANG {MANU|AUTO}
6.1.6 Polarity Display (North/South)
OFF
Switched off
Only the sign is displayed.
ON
Display of the north
and south pole with the
sign of the measuring
value
For the exact definition of north
and south pole, please consult
the documentation of the used
measuring probe. Only for DC
field measurements.
Operation via the external interface:
:PAR:POLD {OFF|ON}
6.1.7 Switching off the
the Device
MANUALLY
Manual switch off via
the IO button
2 MIN
Automatic switch off
after 2 minutes without
Activity
5 MIN
Automatic switch off
after 5 minutes without
activity
The device is switched off when
the buttons have not been
pressed and the measuring
value has not changed significantly.
Operation via the external interface:
:PAR:POFF {MANU|2MIN|5MIN}
Page 37 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 6 Setup Menu
6.1.8 Charging the Batteries
ON
The batteries are
charged via the power
supply or the computer
in operation
Charging is only possible when the
device is switched on.
OFF
The batteries are not
charged
The charging is blocked.
Operation via the external interface:
:PAR:CHAR {OFF|ON}
6.1.9 Brightness of Display Illumination
25%..100%
25%..100%
Adjustment of the brightness
of the display illumination
OFF
Switching off the display illumination
A minor brightness entails a longer battery lifetime.
Operation via the external interface:
:PAR:LIGH {100|75|50|25|OFF}
6.1.10
Display Contrast Adjustment
Adjustment
0%..100%
Adjustment of the display
contrast in 5% steps
Operation via the external interface:
:PAR:CON <0..20>
Page 38 / 75
Adjust the contrast corresponding
to your lighting conditions.
Gaussmeter HGM09s Operating Instructions
Chapter 1
6.1.11
Version Remarks
After quitting the setup menu, two display pages emit some information regarding
the device. If you want to look at the display longer, keep the IO button pressed.
The first page displays:
•
Information regarding the manufacturer
•
Name of the device
•
Installed option
•
Serial number
•
Calibration information
The calibration information consists of the calibration date and the recommended
date of the next recalibration.
The second page displays:
•
Information regarding the used
measuring probe
o
Type name
o
Calibration date
•
Software status of the device
•
Hardware status of the device
In the event of a device failure, please see the third page for more detailed explanations.
Page 39 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7 Serial Interface
7.1 Introduction
ntroduction
Via the installed serial interface all functions of the gaussmeter can be piloted by a
controller (e.g. a personal computer). The interface can be used in two completely
different ways.
On the one hand the gaussmeter can write the data directly into any PC application.
In this KEYBOARD mode, the gaussmeter acts similar to a keyboard that is connected
to a personal computer. The measuring data are transmitted automatically on pressing the DATA button. A special installation of drivers is not necessary. This operating
mode works for computers based on Windows as well as for Linux operating systems or for Apple computers. The only requirement for the computer is that it has a
connection for keyboards based on USB 2.0. This operating mode is e.g. suitable for
filling out Excel sheets easily.
If you want to control the gaussmeter automatically and the connected computer is
supposed to actively carry out the data exchange, a connection via a virtual serial interface is possible. In this operating mode a USB compliant CDC connection is established. The gaussmeter acts like an additional serial interface for a user program.
However, in this case you must install a driver. For the standard Windows operating
systems the driver is included in the delivery.
The data transmission itself, i.e. the protocol, is defined in close connection to the
widely-used SCPI programming language for measuring devices.
Trademark of the respective trademark owner
Page 40 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.2 Connecting the Gaussmeter to a Computer
7.2.1 Connector Plug
The USB port on the top of the gaussmeter is a Mini-B USB 2.0 socket.
USB port
Figure 9 USB Connection
The gaussmeter is connected to the computer via the supplied USB cable.
7.3 Direct Operation on the Computer
The gaussmeter is connected to the computer via the USB interface. The device setting USB MODE is adjusted to KEYBOARD. The top right area of the display shows
KEYB.
The installation of a driver depending on the operating system is generally not required. The operating system solely has to support the HID (Human Interface Device)
device class according to USB 2.0. This is the case for standard computers under
Windows, Linux or Mac OS.
After starting a suitable program, e.g. Microsoft Excel, the measuring data can be
transmitted to the respective data fields by simply pressing the DATA button. The
decimal separator is selected automatically in dependence of the country version of
the computer.
The transmitted number of digits corresponds to the number that is monitored on the
device display. For normal measurements and fast peak value measurements a
measuring value and a carriage return are transmitted. For slow peak value measurements the current value and both peak values are emitted separately by the tab
character. These three values are then normally placed side by side.
Trademark of the respective trademark owner
Page 41 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.3.1 Example Normal Measuring Mode in Excel
The marked values were transmitted by the gaussmeter.
Placement
starting in cell B3.
7.3.2 Example Fast Peak Value Mode in Excel
The marked values were transmitted by the gaussmeter.
Placement
starting in cell B3.
7.3.3 Example Slow Peak Value Mode in Excel
The marked values were transmitted by the
gaussmeter.
Placement
starting in cell B3.
Trademark of the respective trademark owner
Page 42 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4 Operation via Interface
7.4.1 Installation on the Computer
For the comprehensive operation on an external computer use the CDC device class
(Communication Device Class) of the USB specification. This communication class
defines a virtual serial interface on the connected computer. For the user program,
the gaussmeter turns out to be an additional serial interface. The operation can be
tested by simple terminal programs, as Hyperterm under Windows. Depending on
the operating system, the installation of a driver on the computer might become necessary. You find more detailed notes on this in the driver installation documents.
7.4.2 USB Interface Data Format
The data format of the virtual interface is predefined.
A possible adjustment or change of the parameters, as the transfer rate etc., has no
effect. The data flow is stored in the USB protocol. The data are always transmitted
with the maximum possible speed.
7.4.3 Character Set
The ASCII character set is used. The following control characters are used:
Character
<LF>
<CR>
<ETX>
Octal
12
15
3
Decimal
10
13
3
Hex
0A
0D
03
Function
End of command line
Feed
Abort
Other control characters can be used to achieve a clear format. They will be ignored.
7.4.4 Introduction to the SCPI Language
The programming language SCPI (Standard Commands for Programmable Devices)
defines the way a measuring device (here the gaussmeter) can communicate with a
controller. The SCPI language uses a hierarchical structure. The command tree consists of root directory commands that are placed on top and several levels below
each root directory command. You have to specify the complete path to execute
commands of the lower levels.
Trademark of the respective trademark owner
Page 43 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.4.1 Command Structure
The commands generally have a short and a long form. In the following descriptions,
the short form is set in upper case. The attached long form is set in lower case. Only
the characters of the short form are checked for syntactic correctness. Upper and
lower case spelling is not distinguished. The same is true for the parameters. A parameter is always emitted in long form and in upper case.
Example:
Command
Send
Send
Send
PROBe:POTEntialcoil:LENGth?
PROBe:POTEntialcoil:LENGth?
PROB:POTE:LENG?
PROB:POTEntial:leng?
7.4.4.2 Path Separator „:“
If a colon is the first character of a command key word the next command code is a
command of the root directory. If a colon is written between two command codes the
colon entails a path to the next lower level of the current path of the command tree.
Command codes must be separated from one another by a colon. You can omit the
colon at the beginning of a command if the command is the first of a new program
line.
7.4.4.3 Command Separator „;“
Several commands within the same command character string are separated by a
semicolon. By means of a semicolon the indicated path is not changed. The two following statements have the same meaning.
Example:
:IO:DIG:LOGI:IN POS;:IO:DIG:LOGI:OUT NEG
:IO:DIG:LOGI:IN POS;OUT NEG
7.4.4.4 Parameter Separator „,“
If you require several parameters in one command, they have to be separated by a
comma.
Example:
:PROB:SEAR:AREA 12,QMM
7.4.4.5 The Use of Blanks
A parameter must be separated from a command key word by blanks (tab or space).
Blanks are usually only ignored in parameter lists.
Page 44 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.4.6 Query Commands
The controller can send out commands at any time, however a SCPI device (here the
gaussmeter) will only answer, if it has expressly been instructed to do so. Only query
commands (commands that end with a question mark) prompt the device to send a
response. For queries, the device displays either measuring values or internal device
settings.
Note
If you send two query commands without having read the reply to the
first and thereupon try to read the first response, you might receive
some data of the first reply, followed by the complete second response. Therefore do not send any query command without having
read the reply beforehand. Commands and queries should not be
sent via the same program line. This might result in an overflow of the
raw data buffer, in the event that too many data are created.
7.4.4.7 System Commands
Commands starting with an asterisk are called general commands. The commands
with asterisk are used for controlling status operations in the gaussmeter.
7.4.5 SCPI Data Types
The SCPI data language defines different data formats that are used in the program
message and in the reply message. SCPI devices can normally accept commands
and parameters in different formats. In particular the numerical parameters can be
used very freely. Contrary to this general definition, the data formats are restricted in
some places here.
7.4.5.1 Numerical Parameters
Commands that require numerical parameters, accept the generally used decimal
notation of numerical characters including leading characters, decimal points and
leading zeros. The scientific notation is supported. The technical unit is preset for
most commands and will then not be transmitted. For some commands the unit is
part of the command being an additional parameter.
Example:
:PROB:SEAR:AREA 12.345E-3,QM
:PROB:SEAR:RES 123.5
Page 45 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.5.2 Discrete Parameters
Discrete parameters are used in order to program setups that have a limited amount
of values. You have a long and a short form for command key words. Upper and
lower case can be mixed. Replies to queries are always only emitted in long form and
in upper case.
Example:
:PEAK:MODE FAST
7.4.5.3 Boolean Parameters
Boolean parameters represent a single condition that is either true or untrue. As an
untrue condition the gaussmeter accepts "OFF" or "0". As a true condition the gaussmeter accepts "ON" or "1". If a Boolean setup is interrogated, the device always emits
"0" or "1".
Example:
:DISP:BARG ON
:DISP:BARG?
Answer:1<cr><lf>
7.4.5.4 Character
Character String Parameter
Character string parameters can, in principle, contain a limited amount of ASCIIcharacters. A character string must begin and end with either an apostrophe (') or a
quotation mark ("), with the same character at the beginning and at the end of the
character string. The delimiter can be used within the character string by keying it in
twice in a row without blank.
Example:
:PROB:IDEN "PART x"
:PROB:IDEN 'PART x'
7.4.5.5 Entry Endings
Endings
Program messages that are sent to the gaussmeter must end with an <LF> character.
Likewise a <CR> character followed by an <LF> character is accepted. By terminating
a message, the current path is always set back to the root directory.
Page 46 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.5.6 Output Data Format
Output data have the format that is shown in the following chart. Output data always
terminate with a <CR> character followed by an <LF> character.
Types of Output Data
Output Data Format
Queries
<Parameter><cr><lf>
Text
"Character string" <cr><lf>
Numerical Value
+D.DDDDDDE+DD<cr><lf> (D = 0..9)
Page 47 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.6 The SCPI Status Model
The status system records different device conditions in several register groups. The
individual messages are grouped in the several registers. One bit of these registers is
related to one message respectively.
The measuring event register stores the messages that are relevant for the measurement. The data error register stores the error messages and the standard event register the SCPI standard messages.
7.4.6.1 Event Register
The event register can only be read. The signal bits are set by the device but are not
deleted automatically.
Bits in an event register are deleted either by interrogation of this register (*ESR? or
e.g. :STAT:QUES:EVEN?) or by the *CLS command. When interrogating an event
register, the device emits a decimal value that corresponds to the sum of the binary
place values of all bits that are set in this register.
7.4.6.2 Release Register
The individual bits of the assigned event registers are masked via the release registers. Only the released bits enter into the sum bit as an OR connection. The release
registers are read- and writeable. The release registers are not deleted by a query.
The *CLR command does not delete the release registers. The command
:STATus:PRESet deletes the release register for the error data. When interrogating an
event register, the device emits a decimal value that corresponds to the sum of the
binary place values of all bits that are set in this register. For setting the bits in a release register, a decimal value is transmitted that corresponds to the sum of the binary place values of all bits set in this register.
7.4.6.3 Sum Register
In the sum register the results of the event registers are summarized after the masking in the release register and assigned to individual bits. The deletion of the event in
the event registers also sets back the respective sum bit in the status register. Via the
release register of the sum register the individual sum bits can be re-merged to one
whole message service request.
Page 48 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.6.4 Overview Status Model
Figure 10 SCPI Status Model
Page 49 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.4.6.5 Bit Definitions
Bit Definitions Sum Register
Bit
Decimal
Value
Definition
0
Measuring Event
1
One or several bits are set in the measuring event register and activated in the release register.
3
Error Event
8
One or several bits are set in the error event register and
activated in the release register.
5
Standard Event
32
One or several bits are set in the standard event register
and activated in the release register.
6
Maintenance Request
64
One or several bits are set in the sum register and activated in the release register.
Bit Definitions Measuring Event Register
Bit
Decimal
Value
Definition
0
Overflow
1
An area overflow has emerged during the measurement.
1
Data available
2
A measurement is terminated. The data are available.
Bit Definitions Error Data Register
Bit
Decimal
Value
Definition
0
DATA Button
1
Is set when the DATA button has been pressed.
1
General
Calibration Error
2
Is set if the calibration data of the measuring probe could
not be read or if the internal calibration data are not consistent.
6
Internal
Calibration Error
64
Is set if the internal calibration data are not consistent.
7
Probe
Calibration Error
128
Is set if the calibration data of the measuring probe are
not consistent.
Bit Definitions Standard Event Register
Bit
Page 50 / 75
Decimal
Value
Definition
0
OPC
1
Is set at the end of the SCPI command processing.
5
CME
32
An error has emerged upon the SCPI command processing.
7
PON
128
Is set when the device is ready for use.
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.5 Summary of SCPI Commands
The following spellings are used in the SCPI command syntax: optional key words or
parameters are indicated in square brackets [ ]. Parameters within a command
character string are indicated in braces { }. The parameter indicated in angle
brackets < > must be replaced by a value.
7.5.1 Control Commands
*CLS
Reset the status registers.
*ESE?
Readout the event release register.
*ESR[?]
Readout and reset the standard event register.
*IDN?
Read the identification.
*OPC?
Display "1" for synchronization.
*OPC
Set the event bit "Operation terminated".
*RST
Reset the gaussmeter.
*SRE[?]
Readout and set the status byte release register.
*STB?
Readout the status byte sum register.
:STAT:PRES
Reset the error byte release register.
:STAT:QUES:ENAB
Readout and set the error byte release register.
:STAT:QUES:EVEN
Readout the error byte register.
:STAT:MEAS:ENAB
Readout and set the event release register.
:STAT:MEAS:EVEN
Readout the event register.
7.5.2 Main Commands
:MEAS?
Display the current measurement.
:READ?
Display the current measurement.
:UNIT[?]
Preset the physical unit.
:MODE[?] {DC|AC}
Preset the DC or AC field operation mode.
:RANG:SET {0|1|2|3}
Preset the measuring range.
:RANG:AUTO
Activate the automatic measuring range switch.
:RANG?
Interrogate the current measuring range.
:NULL
Null compensation of the measuring probe.
7.5.3 Peak Value
Value Functions
Functions
Page 51 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
:PEAK?
Interrogate the current peak value mode.
:PEAK:MODE {OFF|SLOW|FAST}
Select the peak value mode.
:PEAK:NULL
Reset the current peak values.
:PEAK:READ?
Display the stored peak value.
:PEAK:READ:MIN?
Display the stored minimum peak value.
:PEAK:READ:MAX?
Display the stored maximum peak value.
7.5.4 Probe Functions
:PROB:NAME?
Interrogate the probe designation.
:PROB:SN?
Interrogate the probe serial number.
:PROB:TYPE?
Interrogate the probe type.
7.5.5 Parameters
:PAR:USB[?]
Select the operating mode of the
USB interface.
:PAR:UNIT[?]
Select the magnetic unit.
:PAR:PEAK[?]
Select the peak value recording mode.
:PAR:ACDC[?]
Select the DC or AC field measurement.
:PAR:RANGe[?]
Switch on/off the automatic range selection.
:PAR:POLDetect[?]
Switch on/off the north/south pole display.
:PAR:POFF[?]
Set the automatic turn off time.
:PAR:CHARing[?]
Switch on/off the battery charging.
:PAR:LIGHt[?]
Set the brightness of the display illumination.
:PAR:CONTrast[?]
Set the display contrast.
:PAR:SAVE
Store the set parameters.
7.5.6 Device Functions
Page 52 / 75
:SN:UNIT?
Readout the device serial number.
:SN:SW?
Readout the software version.
:SN:HW
Readout the hardware version.
:SN:CALI
Readout the calibration information.
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6 Explanation of the Individual SCPI Commands
7.6.1 Control Commands
7.6.1.1
*CLS
Description: Resets the status register.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
7.6.1.2
send
*CLS<LF>
*ESE[?]
Description: Reads out the event register. The gaussmeter displays a decimal
value that corresponds to the sum of the binary place values of all
set bits in this register.
Mode: Command and query
Parameter: {<value>} (within the range 0..255)
*RST value: Not relevant
Example:
7.6.1.3
send
send
*ESE 22<LF>
*ESE?<LF>
receive
22<CR><LF>
*ESR[?]
Description: Reads out and resets the standard event register. The gaussmeter
displays a decimal value that corresponds to the sum of the binary
place values of all set bits in this register.
Mode: Command and query
Parameter: {<value>} (in the range 0..255)
*RST value: Not relevant
Example:
send
receive
*ESR?<LF>
160<CR><LF>
Page 53 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.1.4
*IDN?
Description: Reads the gaussmeter identification character string. The gaussmeter
displays the following identification text:
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.1.5
send
*IDN?<LF>
receive
MAGSYS-MAGNET-SYSTEME,HGM09,0,150310,VI<CR><LF>
*OPC?
Description: Issue of "1" to the output buffer after the command has been executed. The command *OPC? can be placed at the end of a command line in order to synchronize the controller with the command
processing. The command itself has no function.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.1.6
send
receive
*OPC?<LF>
1<CR><LF>
*OPC
Description: Sets the bit "Operation terminated" (bit 0) in the standard event register after the command has been executed.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
7.6.1.7
send
*OPC<LF>
*RTS
Description: The gaussmeter is reset to the initial state. The internal parameters
are set to the preset value. The device carries out a complete reset.
Page 54 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
As the device interface is also reset, further commands on the interface might get lost.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
7.6.1.8
send
*RTS<LF>
*SRE[?]
Description: Reads out and sets the status byte release register. The gaussmeter
displays a decimal value that corresponds to the sum of the binary
place values of all set bits in this register.
Mode: Command and query
Parameter: {<value>} (within the range 0..255)
*RST value: Not relevant
Example:
7.6.1.9
send
receive
*SRE<LF>
76<CR><LF>
*STB?
Description: Reads out the status byte sum register.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.1.10
send
send
receive
*ESR 23<LF>
*STB?<LF>
0<CR><LF>
:STAT:PRESet
Description: Resets the error byte release register.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
send
:STAT:PRES<LF>
Page 55 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.1.11
:STAT:QUES:ENABle[?]
Description: Reads out and sets the error byte release register. The gaussmeter
displays a decimal value that corresponds to the sum of the binary
place values of all set bits in this register.
Mode: Command and query
Parameter: None
*RST value: Not relevant
Example:
7.6.1.12
send
send
receive
:STAT:QUES:ENAB 64<LF>
:STAT:QUES:ENAB?<LF>
64<CR><LF>
:STAT:QUES:EVENt?
Description: Reads out the error byte register. The gaussmeter displays a decimal
value that corresponds to the sum of the binary place values of all
set bits in this register.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.1.13
send
receive
:STAT:QUES:EVEN?<LF>
0<CR><LF>
:STAT:MEAS:ENABle[?]
Description: Reads out and sets the event release register. The gaussmeter displays a decimal value that corresponds to the sum of the binary
place values of all set bits in this register.
Mode: Command and query
Parameter: None
*RST value: Not relevant
Example:
Page 56 / 75
send
send
receive
:STAT:MEAS:ENAB 123<LF>
:STAT:MEAS:ENAB?<LF>
123<CR><LF>
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.1.14
:STAT:MEAS:EVENt?
Description: Reads out the event register. The gaussmeter displays a decimal
value that corresponds to the sum of the binary place values of all
set bits in this register.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
send
receive
:STAT:MEAS:EVEN?<LF>
2<CR><LF>
7.6.2 Main Commands
7.6.2.1
:MEAS?
Description: Emits the current measurement (Like :READ?)
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.2.2
send
receive
:MEAS?<LF>
2.546313e-01<CR><LF>
:MODE[?]
Description: The DC or AC field operation mode is preset.
Mode: Command and query
Parameter: {DC | AC}
DC
DC operation mode
AC
AC operation mode
*RST value: DC
Example:
send
send
receive
:MODE AC<LF>
:MODE?<LF>
DC<CR><LF>
Page 57 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.2.3
:NULL
Description: Null compensation of the measuring probe. This function should
only be carried out in sufficiently field-free areas.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
7.6.2.4
send
:NULL<LF>
:RANGe:SET
Description: The gaussmeter measuring range is preset.
Mode: Command
Parameter: { 0 | 1 | 2 | 3 }
0
Most sensitive range
3
Most insensitive range
*RST value: Not relevant
Example:
7.6.2.5
send
:RANG:SET 2<LF>
:RANGe:AUTO
Description: The automatic measuring range switch is activated.
Mode: Command
Parameter: None
*RST value: Not activated
Example:
Page 58 / 75
send
:RANG:AUTO<LF>
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.2.6
:RANGe?
:RANGe?
Description: Interrogates the current measuring range. 0 = most sensitive range.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.2.7
send
receive
:RANG?<LF>
3<CR><LF>
:READ?
Description: Displays the current measurement.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.2.8
send
receive
:READ?<LF>
2.546313e-01<CR><LF>
:UNIT[?]
Description: The physical unit of the measuring value is preset or interrogated.
Mode: Command
Parameter: {TESL|APM|GAUS|OE|G|T}
TESL
T
Unit is Tesla
APM
Unit is A/m
GAUS
G
Unit is Gauss
OE
Unit is Oersted
*RST value: Tesla
Example:
send
send
receive
:UNIT TESL<LF>
:UNIT?<LF>
TESL<CR><LF>
Page 59 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.3 Peak Value Function
7.6.3.1
:PEAK?
:PEAK?
Description: Interrogates the current peak value mode.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.3.2
receive
OFF<CR><LF>
:PEAK:MODE[?]
Description: Selects and interrogates the peak value mode.
Mode: Command and query
Parameter: {OFF | SLOW | FAST}
OFF
No peak value recording
SLOW
Slow peak value recording
FAST
Fast peak value recording
*RST value: OFF
Example:
7.6.3.3
send
:PEAK:MODE SLOW<LF>
:PEAK:NULL
Description: Resets the current peak values.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
Page 60 / 75
send
:PEAK:MODE NULL<LF>
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.3.4
:PEAK:READ?
Description: The stored peak value is displayed. For SlowPeak the absolute larger
peak value with signs; for FastPeak the peak value; for normal
measurement 0 is emitted.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.3.5
send
receive
:PEAK:READ?<LF>
-4.761955e-02<CR><LF>
:PEAK:READ:MIN?
Description: The stored minimum peak value is displayed. For SlowPeak the
smaller peak value of max/min; for FastPeak the absolute larger
peak value with signs; for normal measurement 0 is emitted.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.3.6
send
receive
:PEAK:READ:MAX?<LF>
7.187624e-02<CR><LF>
:PEAK:READ:MAX?
Description: The stored maximum peak value is displayed. For SlowPeak the larger peak value of max/min; for FastPeak the absolute larger peak
value with signs; for normal measurement 0 is emitted.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
send
receive
:PEAK:READ:MIN?<LF>
-2.711216e-02<CR><LF>
Page 61 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.4 Probe Functions
7.6.4.1
:PROB:NAME?
Description: Interrogates the probe name.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.4.2
send
receive
:PROB:NAME?<LF>
"HGM09 Probe
T02.047.33.13
:PROB:SN?
Description: Interrogates the probe serial number.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.4.3
send
receive
:PROB:SN?<LF>
"121109070"<CR><LF>
:PROB:TYPE?
Description: Interrogates the probe type.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
Page 62 / 75
send
receive
:PROB:TYPE?<LF>
0<CR><LF>
"<CR><LF>
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.5 Parameters
7.6.5.1
:PAR:USB[?]
Description: Selects the USB interface operating mode. A change of this parameter has an effect only after the next switching-on of the device. The
changes must be stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {OFF | KEYB | COMP}
OFF
No data connection
KEYB
Keyboard emulation
COMP
Connection via interface
*RST value: Not relevant
Example:
7.6.5.2
send
send
receive
:PAR:USB COMP<LF>
:PAR:USB?<LF>
COMP<CR><LF>
:PAR:UNIT[?]
Description: Selects the magnetic unit. For ALL, the unit is also switched by means
of the RANGE button. The changes must be stored by the command
:PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {ALL | TESL | GAUS | OE | APM}
TESL
T
Unit is Tesla
APM
Unit is A/m
GAUS
G
Unit is Gauss
OE
Unit is Oersted
*RST value: Not relevant
Example:
send
send
receive
:PAR:UNIT ALL<LF>
:PAR:UNIT?<LF>
ALL<CR><LF>
Page 63 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.5.3
:PAR:PEAK[?]
Description: Selects the peak value acquisition mode. The changes must be
stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {OFF | SLOW | FAST}
OFF
No peak value recording
SLOW
Slow peak value recording
FAST
Fast peak value recording
*RST value: Not relevant
Example:
7.6.5.4
send
send
receive
:PAR:PEAK SLOW<LF>
:PAR:PEAK?<LF>
SLOW<CR><LF>
:PAR:ACDC[?]
Description: Selects the DC or AC field measurement. For BOTH, the DC/AC
field mode is also switched by the RANGE button. The changes must
be stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {BOTH | DC | AC}
BOTH
Selection via the RANGE button
DC
DC field operating mode
AC
AC field operating mode
*RST value: Not relevant
Example:
Page 64 / 75
send
send
receive
:PAR:ACDC DC<LF>
:PAR:ACDC?<LF>
DC<CR><LF>
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.5.5
:PAR:RANGe[?]
Description: Switches on/off the automatic range selection. The changes must be
stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {MANU | AUTO}
MANU
Selection via the RANGE button
AUTO
Automatic range selection
*RST value: Not relevant
Example:
7.6.5.6
send
send
receive
:PAR:RANG MANU<LF>
:PAR:RANG?<LF>
MANU<CR><LF>
:PAR:POLDetect[?]
Description: Switches on/off the north/south pole display. The changes must be
stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {OFF | ON}
OFF
Switch off the pole display
ON
Switch on the pole display
*RST value: Not relevant
Example:
7.6.5.7
send
send
receive
:PAR:POLD ON<LF>
:PAR:POLD?<LF>
OFF<CR><LF>
:PAR:POFF[?]
Description: Sets the turn-off time or switches off the function respectively. The
device is switched off automatically after a determined period of inactivity. The changes must be stored by the command :PAR:SAVE, if
necessary.
Mode: Command and query
Parameter: {MANU | 2MIN | 5MIN}
Page 65 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
MANU
Switch off the automatic turn-off
2MIN
Automatic turn-off after 2 minutes
5MIN
Automatic turn-off after 5 minutes
*RST value: Not relevant
Example:
7.6.5.8
send
send
receive
:PAR:POFF MANU<LF>
:PAR:POFF?<LF>
MANU<CR><LF>
:PAR:CHARing[?]
Description: Switches on/off the battery charging. The changes must be stored by
the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {OFF | ON}
OFF
Switch off the battery charging
ON
Switch on the battery charging
*RST value: Not relevant
Example:
7.6.5.9
send
send
receive
:PAR:CHAR OFF<LF>
:PAR:CHAR?<LF>
OFF<CR><LF>
:PAR:LIGHt[?]
:PAR:LIGHt[?]
Description: Sets the brightness of the display illumination or switches off the illumination respectively. The changes must be stored by the command :PAR:SAVE, if necessary.
Mode: Command and query
Parameter: {100 | 75 | 50 | 25 | OFF}
25 .. 100
Brightness of the display illumination in %
OFF
Switch off the display illumination
*RST value: Not relevant
Page 66 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
Example:
7.6.5.10
send
send
receive
:PAR:LIGH 75<LF>
:PAR:LIGH?<LF>
100<CR><LF>
:PAR:CONTrast[?]
Description: Sets the display contrast. The changes must be stored by the command :PAR:SAVE, if necessary. The value corresponds to 5% steps.
Mode: Command and query
Parameter: {<value>} (within the range 0..20)
0 .. 20
Display contrast in 5%
*RST value: Not relevant
Example:
7.6.5.11
send
send
receive
:PAR:CONT 15<LF>
:PAR:CONT?<LF>
11<CR><LF>
:PAR:SAVE
Description: Stores the set parameters.
Mode: Command
Parameter: None
*RST value: Not relevant
Example:
send
:PAR:SAVE<LF>
7.6.6 Device Functions
7.6.6.1
:SN:UNIT?
Description: Emits the serial number of the device.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
send
receive
:SN:UNIT?<LF>
010110078<CR><LF>
Page 67 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
7.6.6.2
:SN:SW?
Description: Emits the software version.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.6.3
send
receive
:SN:SW?<LF>
180310<CR><LF>
:SN:HW
Description: Reads out the hardware version.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
7.6.6.4
send
receive
:SN:HW?<LF>
VI<CR><LF>
:SN:CALI
Description: Reads out the calibration information.
Mode: Query
Parameter: None
*RST value: Not relevant
Example:
Page 68 / 75
send
receive
:SN:CALI?<LF>
01JAN10 / 01JAN12<CR><LF>
Gaussmeter HGM09s Operating Instructions
Chapter 8 Unit Conversion Table
8 Unit Conversion Table
This table shows the relationship between the displayed measuring values.
Unit
Display
Conversion
Mag. flux density B
Size
SI
Tesla
T
1 T = 104 ⋅ G
Flux density
C
GS
Gauss
G
1 G = 10 −4 ⋅ T
Mag. field strength H
SI
Ampere/meter
A/m
Magnetic field strength
C
GS
Oersted
Oe
1 Am −1 =
1 Oe =
4π
Oe
1000
1000
Am −1
4π
Page 69 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 9 Technical Data
9 Technical Data
General
Power Supply Power supply unit 100..240 VAC, 50/60Hz, 0.3 Amax
USB interface
Battery 2 x AA 1.2 V NiMH (rechargeable)
Power Consumption approx. 2.5 W
Environmental Conditions -10°C to 40°C;
< 80% relative humidity at 40°C non-condensing
Storage -40°C to 70°C
Housing Dimensions approx. 145 x 80 x 40 mm3
Weight approx. 250 g (incl. batteries, without probe)
Warranty 2 years
Accessories Power supply unit, data carrier with user manual, USB cable
Mathematical Functions Conversion of units and derived parameters
Linearization of the probe measurement
Data Protocol SCPI (standard commands for programmable measuring devices)
External Interfaces USB 2.0
Display Graphical, high-contrast LCD contrast adjustable via menu
Parameter Memory in Storage of the calibration values
Probes
Measurement Proper
Properties
Measuring Method Continuous acquisition of the magnetic field; conversion via 16 Bit A/Dconverter; analysis via 16 bit microprocessor system.
Display Updating Time Measuring values: approx. 100ms;
Display Resolution 3- to 4-digit, range-depending
Frequency Range DC/AC 0 Hz..5 kHz (effective value)
Measurement accuracy Accuracy (1σ)
DC Field
Measurement
AC Field
Measurement
Error
≤1.5 T
≤±0.5 %
> 1.5 T
≤±1.0 %
Frequency
Beff
≤2 kHz
≤1 T
≤±1.0 %
See Text
≤5 kHz
≤2 T
≤±2.0 %
Peak Value
Measurement
Range
≤±1.0 %
≤±2.0 %
See Text
Page 70 / 75
B
10 mT
≤70 Hz
≤100 Hz
100 mT
≤100 Hz
≤150 Hz
1T
≤300 Hz
≤500 Hz
4.5 T
≤500 Hz (B <1.5T)
≤700 Hz
Gaussmeter HGM09s Operating Instructions
Chapter 9 Technical Data
Units Tesla
Gauss
Oersted
Ampere/meter
Measuring Ranges 4.5 T
45 kG
(10 G)
45 kOe
(10 Oe)
3800 kA/m
(1 kA/m)
1T
10 kG
(1 G)
10 kOe
(1 Oe)
1000 kA/m
(100 A/m)
100 mT
(10 µT)
1 kG
(100 mG)
1 kOe
(100 mOe)
100 kA/m
(10 A/m)
10 mT
(1 µT)
100 G
(10 mG)
100 Oe
(10 mOe)
10 kA/m
(1 A/m)
30 kG
(100 G)
30 kOe
(100 Oe)
2500 kA/m
(10 kA/m)
1T
10 kG
(10 G)
10 kOe
(10 Oe)
1000 kA/m
(1 kA/m)
100 mT
(100 µT)
1 kG
(1 G)
1 kOe
(1 Oe)
100 kA/m
(100 A/m)
10 mT
(10 µT)
100 G
(100 mG)
100 Oe
(100 mOe)
10 kA/m
(10 A/m)
45 kG
(100 G)
45 kOe
(100 Oe)
3800 kA/m
(10 kA/m)
1T
10 kG
(10 G)
10 kOe
(10 Oe)
1000 kA/m
(1 kA/m)
100 mT
(100 µT)
1 kG
(1 G)
1 kOe
(1 Oe)
100 kA/m
(100 A/m)
10 mT
(10 µT)
100 G
(100 mG)
100 Oe
(100 mOe)
10 kA/m
(10 A/m)
(Resolution)
(1 mT)
DC Field Measurement (100 µT)
Measuring Ranges 3.0 T
(Resolution)
(10 mT)
AC Field Measurement (1 mT)
Measuring Ranges 4.5 T
(Resolution)
(10 mT)
Fast Pulse Measurement (1 mT)
Peak Hold tsignal > 250 µs
Probes
Standard transversal probe N (incl. in delivery):
(Special Designs on Request) dimensions approx. 3.5 x 1.35 x 46 mm3
Axial probe: dimensions approx. 4 mm ∅ x 60 mm
Transversal probe S: dimensions approx. 3.5 x 0.75 x 46 mm3
All probes:
Active range ∅ 0.15mm
Handle bar approx. 11 mm ∅ x 100mm
Cable length: 1.5m (special lengths available)
Integrated parameter memory
Environmental Conditions
Operating Environment Specified accuracy for 0 °C up to 40 °C
Relative Operating Humidity Up to 80 % relative humidity for temperatures up to
30 °C, linearly decreasing to 50 % relative humidity at 40 °C.
Storage Environment -20 °C up to 70 °C
Altitude 0 – 2000 meters as per IEC 61010-1 2nd Edition CAT III, 1000 V
Degree of Pollution Degree of pollution II
Notes: The technical data apply for a one-hour warm-up phase.
Page 71 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 10 Declaration of Conformity
10 Declaration of Conformity
EC Conformity Declaration in accordance with the EC Guide
Guidelines
EG-Konformitätserklärung im Sinne der EG-Richtlinie
Certificat de conformité en accord avec les directives Européennes
Manufactu
Manufacturer’s Name:
MAGSYS magnet systeme GmbH
Hersteller Name:
Fabricant:
Manufacturer’s Address:
Hersteller Anschrift:
Adresse:
Rohwedderstr. 7
44369 Dortmund – Germany
Declares under sole responsibility that the product as originally delive
delivered
Erklärt unter der Vorraussetzung, dass das Gerät dem Auslieferungszustand entsprechend
Déclarons sous notre seule responsabilité que le produit
Product Name:
MAGSYS HAND
HANDGAUSSMETER
Produkt Name:
Nom du produit:
Model Num
Number:
Model Nummer:
Référence commerciale:
HGM09s
Product Opti
Options:
This declaration covers all options of the above pro
product
Produkt Optionen:
Options du produit
Diese Erklärung erfasst alle Optionen des Gerätes
Cette déclaration couvre toutes les options du produit concerné
has been designed, constructed and manufactured in accordance with
the listed EC guidelines in their latest version
entwickelt, konstruiert und gefertigt wurde in Übereinstimmung mit den
aufgeführten EG-Richtlinien in der jeweils letzten gültigen Fassung
concerné par cette déclaration a été conçue et fabriqué selon les directives
Directive basse tension (2006/95/EC)
Directive C.E.M. (2004/108/EC)
and conforms
conforms with the following product standards:
und den folgenden Vorschriften entspricht:
et en conformité avec les normes suivantes:
EMC
Standard
Limits
EMV
C.E.M.
Norm
Norme
Grenzen
Limites
IEC 61000-4-2:1995 / EN 61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-2:1995
for the power supply
4kV CD, 8kV AD
3 V/m, 80-1000 MHz
EN 55022 Class B / EN61000-3-2,3
EN 55024 / EN 61000-42,3,4,5,6,8,11
für das Netzteil
pour l’alimentation
Safety
IEC 61010-1:2001 / EN 61010-1:2001
Sicherheit
Sécurité
for the power
power supply
TÜV EN 60950-1:2000 +A11 / CE
für das Netztel
pour l’alimentation
02-Dec-2009
Date / Datum
M. Kopka Dipl.Ing. CEO
For further information, please contact your local Goudsmit Magnetic Systems sales office, agent or distributor, or Goudsmit Magnetic
Systems, Petunialaan 19, 5582HA, Waalre, Netherlands. www.goudsmit-magnetics.nl
Für weitere Informationen kontaktieren Sie bitte Ihr örtliches Goudsmit Magnetic Systems Vertriebsbüro, Handelsvertreter oder Händler
oder direkt Goudsmit Magnetic Systems, Petunialaan 19, 5582HA, Waalre, Netherlands. www.goudsmit-magnetics.nl
Pour de plus amples informations, merci de prendre contact avec notre représentant local. Vous pouvez également nous contacter à
l’adresse suivante: Goudsmit Magnetic Systems, Petunialaan 19, 5582HA, Waalre, Netherlands. www.goudsmit-magnetics.nl
Page 72 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 11 Warranty and Copyright
11 Warranty and Copyright
Copyright
© Copyright 2010 Goudsmit Magnetic Systems
All rights reserved. No part of the manual or the device including its control program (software) is allowed to be reproduced or duplicated without written authorization of the
author.
Liability
We do not take any liability for the correctness of this manual nor for any damages which might originate through the
use of it. Since mistakes can never be avoided completely,
despite all efforts, we would appreciate any given hint. We
will be striving to fix any mistake as fast as possible.
Verification of Suitability
Goudsmit Magnetic Systems hereby certifies that this product
has been inspected and tested before shipment in accordance with the stated technical data. Furthermore, Goudsmit
Magnetic Systems declares that its calibration measurements
are traceable to the Physikalisch-Technische Bundesanstalt,
Braunschweig, or to the United States National Institute of
Standards and Technology (former National Bureau of Standards) and to other members of the International Standardization Organization (ISO), provided that the calibration possibilities of these institutes allow this.
solely responsible for design and assembly of electric circuits
in connection with this product. Goudsmit Magnetic Systems
cannot be made liable neither for customers’ circuits nor for
malfunctions of the product resulting from these. Moreover,
Goudsmit Magnetic Systems will not accept warranty for
damage which is traceable to customers’ circuits or to products provided by the customer. Any further explicit or tacit
warranty is excluded; Goudsmit Magnetic Systems especially
rejects any tacit warranty concerning the qualification for a
special purpose or to marketability.
Exclusive Measures
The above-mentioned measures are the only and exclusive
measures on the side of the buyer. Goudsmit Magnetic Systems is not liable for direct, indirect, particular damages or
damages resulting from negligence or consequential damages, no matter if they are founded on warranty, contract,
offence or any further legal theory. This does not apply as
far as Goudsmit Magnetic Systems is necessarily made liable
by law.
Annotation
The warranty is valid for two years starting from the date of
shipment and comprises material and fabrication errors.
Within the warranty period Goudsmit Magnetic Systems replaces or repairs products which have proved to be defective.
The information in this document is subject to alterations
without prior announcement. Goudsmit Magnetic Systems
does not take over warranty for this material including the
marketability or its qualification for any determined purpose
beyond. Goudsmit Magnetic Systems do not take over liability for errors in this manual or for accidental or consequential errors within the context of shipment, performance or
usage of this material. No portion of this document may reproduced, translated or transmitted, in any form or by any
means, electronic, mechanical, photocopying, recording, or
otherwise, without the express written permission of
Goudsmit Magnetic Systems.
Return under Warranty
Safety
In case of warranty the device must be returned to a service
point determined by Goudsmit Magnetic Systems. On returning the device under warranty, the buyer bears the costs for
the shipment to Goudsmit Magnetic Systems, while
Goudsmit Magnetic Systems bears the costs for returning the
device to the buyer. However, the buyer bears all the costs
for shipment, taxes and duties, if the device is returned to
Goudsmit Magnetic Systems from abroad.
Do not replace any parts and do not make alterations to the
product without our explicit and written consent. Send the
product to Goudsmit Magnetic Systems for repair and maintenance to safeguard that all safety features be preserved.
Handling malpractices may lead to damage at the device
and possibly to injuries and death of persons.
Warranty
Extent of Warranty
The warranty already mentioned does not apply for errors
due to inadequate or insufficient maintenance on the part of
the buyer, due to unauthorized modifications or maloperation, to software or interfaces provided by the buyer, or to
operations beyond normal ambient conditions. The buyer is
Goudsmit Magnetic Systems
Petunialaan 19
5582HA Waalre - Netherlands
Page 73 / 75
Gaussmeter HGM09s Operating Instructions
Chapter 12 Index
12 Index
Accuracy.....................................15
*
*CLS........................................... 53
*ESE .......................................... 53
*ESR .......................................... 53
*IDN ........................................... 54
*OPC.......................................... 54
*RTS .......................................... 54
*SRE .......................................... 55
*STB........................................... 55
:
:MEAS........................................ 57
:MODE ....................................... 57
:NULL ......................................... 58
:PAR
ACDC.................................... 64
CHAR.................................... 66
CONT.................................... 67
LIGH ..................................... 66
PEAK .................................... 64
POFF ..................................... 65
POLD .................................... 65
RANG ................................... 65
SAVE .................................... 67
UNIT ..................................... 63
USB....................................... 63
:PEAK ........................................ 60
MODE................................... 60
NULL .................................... 60
READ.................................... 61
MAX................................. 61
MIN .................................. 61
:PROB
NAME................................... 62
SN ......................................... 62
TYPE..................................... 62
:RANG........................................ 59
AUTO.................................... 58
SET ....................................... 58
:READ ........................................ 59
:SN
CALI ..................................... 68
HW........................................ 68
SW......................................... 68
UNIT ..................................... 67
:STAT
MEAS
ENAB ............................... 56
EVEN ............................... 57
PRES ..................................... 55
QUES
ENAB ............................... 56
EVEN ............................... 56
B
Linear Properties ........................ 10
Batteries .....................................18
Blanks.........................................44
Boolean Parameters ...................46
M
C
Main Commands .................. 51, 57
Measurement Details ................. 13
Measuring Range ................... 8, 25
Measuring Unit ....................... 8, 26
Character Set..............................43
Character String Parameters ......46
Charging .....................................38
Charging Batteries ......................19
Command Separator...................44
Command Structure....................44
Conformity Declaration ...............72
Connector Plug ...........................41
Contents .......................................3
Contrast Adjustment ...................38
Control Commands ...............51, 53
Cross Current Resistance ...........12
N
Non-linear Properties.................. 11
Null............................................. 24
Numerical Parameters................ 45
O
Operating Mode.......................... 35
Operation ................................... 21
Output Data................................ 47
D
Data Format................................43
DC Field Measurements .............27
DC/AC Field................................36
DC/AC Field Measurements .......26
Device Functions ..................52, 67
Direct Operation..........................41
Discrete Parameters ...................46
Display....................................9, 22
Display Brightness ......................38
Display Units...............................35
E
Endings.......................................46
P
Parameter Separator .................. 44
Parameters........................... 52, 63
Path Separator ........................... 44
Peak Value................................. 36
Peak Value Functions .......... 51, 60
Peak Value Measurement .......... 30
Peak Value Recording................ 30
Polarity ....................................... 37
Ports Overview ........................... 17
Power Supply ............................. 18
Preparing a Measurement ............ 7
Probe Connection....................... 20
Probe Data ................................. 33
Probe Functions ................... 52, 62
F
Fast Peak Value Recording ........31
Field strength ..............................69
Flux density.................................69
Front Side ...................................17
Q
Query Commands ...................... 45
R
Gaussmeter Function..................10
Range Selection ......................... 37
Remanence................................ 14
Running a Measurement .............. 7
H
S
Hall Effect ...................................10
Safety Instructions.................... 5, 6
Safety Symbols ............................ 6
Sample Measurement ................ 13
SCPI............................... 45, 51, 53
SCPI Language .......................... 43
Sensitivity................................... 12
Serial Interface.......................... 40
Settings ..................................... 35
Setup Menu................................ 34
Static Magnetic Fields ................ 16
Status Display ........................ 9, 22
Summary.................................... 51
G
I
:UNIT.......................................... 59
Illustrations ...................................4
Installation ..................................43
Interface......................................43
Introduction ...................................7
A
K
AC Field Measurements ............. 28
Keyboard ....................................21
Page 74 / 75
L
Gaussmeter HGM09s Operating Instructions
Chapter 12 Index
Switching off ............................... 37
Switching on/off .......................... 24
System Commands .................... 45
T
Technical Data ........................... 70
U
V
Unit ............................................ 69
USB ............................................ 41
USB Interface ............................ 20
Version Remarks........................ 39
W
Warranty..................................... 73
Page 75 / 75
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