DEXIN MAG DX-330F Three Dimensional Fluxgate Magnetometer User Manual
- June 1, 2024
- DEXIN MAG
Table of Contents
DEXIN MAG DX-330F Three Dimensional Fluxgate Magnetometer
Company introduction
Xiamen Dexing Magnet Tech. Co., Ltd. is a technology-based company specializing in high-precision magnetic testing equipment and magnetic field control for fully automated magnetic measurement systems. Relying on the advanced technology of the Chinese Academy of Sciences, we have developed and produced high-precision onedimensional, two-dimensional, and three-dimensional Hall probes (with temperature compensation), as well as multi-dimensional high-precision and high-resolution magnetometers. We have passed the IS0 9001 and IQ NET international system certification, and have achieved international advanced levels in multiple performance and usage. And it has been repeatedly applied in aerospace, military industry, navigation, scientific research, and universities, and has received widespread praise.
Our company can develop and produce various magnetic measurement systems based on user needs, including multi-point array magnetic scanning systems and industrial automation detection systems, remote wired and wireless control systems, magnetic shielding systems, geomagnetic compensation systems and special Gauss meters, fluxgate meters, high-precision magnetic field control platforms, and metrological verification systems (our company uses an accuracy of 0.002% ± 0.0002% of the read and used soil) Customized products such as multi-dimensional magnetic field analysis and scanning system, multi- dimensional motor magnetic field testing and analysis system, multipole magnetic ring testing system, geomagnetic shielding magnetic measurement system, multipoint array magnetic scanning system, Hall effect testing system, wire rod and electromagnet, etc. At the same time, we act as an agent for international cutting-edge magnetic instrument companies’ products
DX-330F
DX-330F is produced by Xiamen Dexing Magnet Tech. Co., Ltd. which is a high
precision fully intelligent device to test weak magnetic field strength.
Bright Full View VGA 15 ¾ Bit reading resolution| Basic accuracy:
± 0.50% ± 0.05% of reading
---|---
Data storage (automatic/manual)/storage data| Basic resolution
0.1nT
Max/Min Hold/Interface Lock| Automatic zero and automatic range
Probe automatic calibration/ host automatic| Mode RS-232C/USB data
communication interface/analog signal interface
Display unit optional nT| Zero setting/relative measurement mode
Measurement software graphic display, communication baud rate
adjustment| Threshold setting (upper and lower limits) and
Time and brightness settings| Optional basic probe
High precision, high resolution
The DX-330F three-dimensional fluxgate meter is designed with a combination of
high-precision user-friendly instruments and high-precision user-friendly Hall
probes, achieving basic accuracy of 0.50% ± 0.05% of the reading range and
basic resolution of 0.1nT. So as to reach the world’s advanced level.
High intelligence, multifunctional
The DX-330F three-dimensional fluxgate meter can measure DC and AC magnetic
fields, with the maximum and minimum values keeping the J interface locked,
data storage (automatic/manual)/user reading, excellent upper computer user
reading and recording functions, automatic probe calibration/host automatic
memory operation mode, automatic zero point, automatic range, threshold
setting and alarm, time and brightness self setting, and display unit
selectable in milligauss Numerous intelligent features such as Natesla
High automation
The DX-330F three-dimensional fluxgate meter has rich interface
characteristics and is suitable for automatic measurement systems. RS-232C
interface function: test user input and output.
- Users can use a computer to test and read data, and use professional mapping software to draw various measurement charts, which can be sent and printed.
- Real time sending function through serial port can monitor real-time usage data on the computer end in real time
- Real time user data can be queried using a fixed instruction set Three channel analog data output: output o ± 10V analog signal (connected to oscilloscope), and can be equipped with various industrial control interfaces.
High consistency
DX-330F has high stability, high consistency, and consistency up to 0.5%
(stable magnetic field)
High-precision probe
The DX-330F 3D fluxgate meter is equipped with a full range of 3D fluxgate
probes. The probe has been calibrated before leaving the factory and the
calibration information is stored in the user-friendly probe, so different
probes have complete interchangeability, allowing you to replace probes
anywhere in the world. There is no need to calibrate during use.
The connection of back panel
- Confirm that the rear panel power switch is in the off (O or OFF) position.
- Insert the probe into the 15-pin D-type probe input connector on the rear panel and tighten the bolts on both sides of the connector.
- Insert one side of the AC power cord into the power input component, and connect the other side reliably to comply with national safety regulations Standard and well grounded 3-terminal 220 volt AC power socket or adapter.
- If you need to communicate with a computer or use BNC output signals and other customized interfaces, please follow the instructions or special instructions to link the corresponding connecting wires.
Warning : As a general operating regulation, this instrument must be turned off before making any rear panel connections. This regulation should be strictly enforced, especially when connecting the probe to the rear panel
Turning on and measure
Warning: The probe used in the DX-330F three-dimensional fluxgate meter has a
conductive sheath. Please do not approach exposed areas Any measurement near
the voltage may cause personal injury to the user and damage to the
instrument.
- Turn on the power switch, in order to stabilize the reading, please wait for a warm-up time of 20-30 minutes after turning on the switch.
- After preheating, move the probe away from the measured magnetic field area. At this time, the Gauss meter display screen will have a reading, which is sensor static bias voltage. At this point, press the [Zero] button on the front panel to change the reading as the measurement zero point
- After resetting,d area for reading. Please do not remove the protective sleeve. After the measurement is comp remove the Gauss meter probe from the protective sleeve and place it back in the measured magnetic fielleted, the probe can be retracted into the protective sleeve. Please note the type of probe used. The testing method, location, and direction vary for different probe types. Please refer to the following text for details.
Common functions
Range switching – Press the [R ange] button on the front panel repeatedly, and
the measurement range of the Gaussian meter will cycle between automatic range
AUTO, 30mT, 300mT, and 3T. Usually, the default measurement range is automatic
range, without the need to switch to manual range.
Peak valley value display – Press the [Max/M] button on the front panel, and the screen will display the maximum and minimum values of the measured data during the measurement process after pressing the button (the positive and negative signs used to indicate the direction will be included in the comparison range). If you need to record the maximum and minimum values again, press the [R ese t] button on the front panel.
Operation introduction
Generation
This chapter introduce the operation method of DX-330F fluxgate magnetometer,
mainly introduce the functions of front panel and the definition of front
panel and back panel.
Front panel
- Enter: Confirm operation key
- Menu: Open the menu
- Hold: Test data keep button
- Save: save key, press it you could set the save mode of data
- ▲▼: Direction key, when it is in set parameters state, it could select the parameters
- Max/Min.: Open or closed peak value test function, it could capture and display the Min. or Max. magnetic field strength of each axial
- Zero: Zero key, makes the current value to Zero
- Relative: Relative mode, record the relative value
- Reset: Reset of peak vale, delete the current peak value
The followings are the 3 types basic keyboard operation methods:
- A : Direct operation: The following functions would be valid once press the keys: Menu, Zero, Enter, Relative, Reset;
- B : Itinerant operation: Save, Max/Min are circle selection function keys;
- C : Set selection: Press the menu key and it would be menu interface.
The definition of front panel
- Three-dimensional display: The first frame displays the current range and test mode; the second frame shows the testdata of X axial. The third frame displays the test data of Y axial. The fourth frame shows the test data of Z axial. The last line shows the date, time and temperature (If using a probe with a temperature sensor to display the temperature of the detection point)
- One dimensional display: colorful display, VGA display screen displays the current range, test data and peak value of X, Y and Z axial. The polarity of N and S would be shown as + and -.
Back panel
The back panel includes: input power units, fuse unit, Rs-232 connector, monitor analog output connector and probe connectors
- The input power unit, fuse unit: DX-330F uses three-core power line, power switch, press “I”, turn on the meter, press “O”, power off.
- RS-232 serial communication port, standard is 9 pins D type.
- Analog output, standard BNC connector
- Probe connector, standard 15 pins D type connector
The introduction of Menu
Press “Menu” to enter to menu.
Time set
Press enter key, use the left-right key to move the cursor (in red) , using
up-down key adjust the date and time, after confirm move to Exit and press
Enter key to finish set.
Cal correction
This is only available for manufacturer.
Threshould Set
Press enter, according to up- down key to select set items of X, Y and Z.
According to Menu key to move cursor ( in yellow), according to up-down key to
select the enter value, which could be accurate to o.1nT. After setting, move
the cursor to Exit, press enter to exit. If it is over range, it would
alarm.
Brightness set
Press Enter key to enter the set, press up-down key to adjust the value in
frame.
Save set
Saving timing: press Save key when test, it would automatic save the data
of X,Y and Z , and date, time. Press enter, set the save time interval by up-
down key. The set range is 01-60s, press enter to exit.
Random save: press enter key to confirm, press the save key on the front
panel each time, it would save the date of X, Y and Z at any time.
Clear save: after select it, press enter, it would clear all save
data.
Uart, the selection of baud rate
Press enter to check the baud rate. It is fixed as 115200 Save sending mode:
send the save data, press enter to send data, after it, it would notice
transmit over, press Enter key to exit.
Introduction of probe
Exchanged probe
Each probe is equipped with one piece storage. The probe is calibrated before
sending out and record the data into the storage. Therefore, if the same
models , they could directly exchanged, no need for calibration.
Warn : Please connect the probe before power connections. If you connect
the probe after power connection, it may cause the storage invalid. When
exchanging the probes, please turn off the power, disconnect the probe and
then connect new probe. Turn on the power, zero the new probe by using Zero
mode in menu. If you do not connect the probe, the error would be shown as
following:
Probe protection
Although every effort has been made to make the probe as sturdy as possible,
the probe, especially the Hall sensor tip in the transverse probe, is still
fragile. Therefore, great care must be taken during measurement operations to
ensure that no pressure is applied to the probe tip. It is best to fix the
probe in a suitable position through the probe handle. No stress should be
applied to the metal sleeve of the probe tcoa uasveo dida mcaalgiber atoti
othne d Hataal lc sheannsgoers. caused by sensor deformation. Excessive stress
will
Warning : Extreme caution must be exercised when handling probes. The
probe tip is extremely prone to breakage, and applying stress to the Hall
sensor will change its calibration performance. Any excessive stress will
easily cause the sensor to break, and the broken sensor is not repairable.
For all probes, do not compress the cables tightly or subject them to heavy or sharp objects. Although damaged or broken cables can be returned for repair, it is important to remember that damaged probes may still be non-repairable. When the probe is connected to a Gauss meter but not in use, a protective tube should be used to cover the handle and sleeve to protect the tip. When the Gauss meter is not in use, the probe should be stored separately in a sturdy container.
Probe operation
In the DC magnetic field measurement mode, the probe direction affects the
polarity of the Gauss meter reading. Note: To achieve optimal results, the
instrument and probe should be preheated for at least 5 minutes before use,
and after preheating for 30 minutes, they should reach the rated accuracy. If
the actual magnetic field direction is unknown, press the Max Hold key to
activate the peak measurement function and slowly adjust the probe. As the
probe rotates and the field strength is measured, its peak reading is retained
in the display, and the direction of the probe at which the peak is obtained
is recorded to determine the direction of the magnetic field. As shown in the
figure
Probe accuracy
Note : The probe reading depends on the angle between the tip and the
direction of the magnetic field. The larger the included angle, the greater
the percentage error of the reading.
Note : To achieve optimal results, the instrument and probe should be
preheated for at least 5 minutes before use, and after preheating for 30
minutes, they should reach the rated accuracy. Users need to consider any
factors that may affect reading accuracy.
Both the probe and Gaussian meter have rated accuracy, which is the highest accuracy that can be achieved in use. Before strict measurement, the probe should be zeroed first to eliminate the influence of probe zero drift or small environmental magnetic fields. Temperature will also affect the accuracy of the probe. Please try to adjust the probe as much as possible.
Use the head at a temperature near 20 ℃. The accuracy of the probe depends on
the angle between the Hall sensor and the magnetic field. The maximum reading
is obtained when the magnetic field line is orthogonal to the sensor plane (at
right angles to all three axes of the sensor). Deviation from orthogonality.
The larger the distance, the greater the reading error. The relationship
between reading error and angle is shown in Figure 3-1. In strict measurement,
it is necessary to consider the tolerances of instruments, probes, and
magnetic fields. The reading accuracy of DX-330F is better than 0.05% of the
reading. The various uncertain factors in measurement are difficult to
reproduce, so it is difficult to provide absolute accuracy indicators for
Gaussian meters and probes. For example, a 1 C error aligned with the magnetic
field will result in a 0.15% reading error. This means that the absolute
measurement accuracy of the magnetic field will not reliably exceed 0.05%
under poor conditions, and is more likely to be between 0.10% and 0.2%.
Attention:
- High precision measurement should consider the magnetic interference of the environment, whether the power supply in the laboratory is stable, and whether it is grounded as required.
- If the magnetic field strength of the test object is multiple points, the probe should be kept fixed as much as possible to prevent the measured object from moving.
Operation of data communication interface
Generation
DX-330F three dimensional fluxgate magnetometer is equipped with RS-232
serial communication port and USB port. The ports support the computer to read
the test data and send data to upper computer in real time, and then, save the
data and drawing by software and remove control and automatic control. It
could choose RS-232 to USB port to USB port.
Generation of serial communication port
The DX-330F uses serial communication port of computer, which is RS-232 port.
Physical connection
The back panel of DX-330F three dimensional fluxgate magnetometer is equipped
with 1 piece 9 pins D type connector, used to serial communication. The
standard in the beginning is 25 pins, while, nowadays 9 pins and 25 pins are
both the common standard in the computer area. Many the third part of
communication cables could use 9 pins and 25 pins to the computer.
The serial connector equipped with the DX-330F three-dimensional fluxgate meter is a pair of 9-pin D-type connectors that match the male side of the socket and must match the male side of the communication cable. If the wiring sequence of the communication cable is correct, but the end is a female, then a swappable cable must be used to match the two female sockets on the instrument rear panel and the end of the serial cable. The character (DCE) above the serial interface connector represents the Data Communication Equipment and determines the wire sequence and connection of directional leads such as the sending data line (Tx) and receiving data line (Rx). Electronic devices with data terminal equipment (DTE) wiring can be connected to the DX- 330F through a straight through cable. Example: The? Pin and 3 pin of the DCE connector are the sending data line (Tx) and the receiving data line (Rx), respectively, while the 2 pin and 3 pin of the DTE connector are the receiving data line (Rx) and the sending data line (Tx), respectively, to achieve complementary docking. Usually, the serial interface configured on a PC is a 9-pin D-type DTE setting, which can be connected to the DX-330F using a straight through cable.
| DX-330F（DCE） | PC（DTE） | |
|---|---|---|
| DB-9F | DB-25M | DB-9M |
| Pin | Description | PIN |
Description
| 1| Blank| 2| Tx| 1| DCD
2| Send data
(Tx)
| 3| Rx| 2| Rx
3| Receive
data (Rx)
| 4| RTS| 3| Tx
4| Blank| 5| CTS| 4| DTR
5| (GND)| 6| DSR| 5| GND
6| Blank| 7| GND| 6| DSR
7| Blank| 8| DCD| 7| RTS
8| Blank| 20| DTR| 8| CTS
9| Blank| 22| Ring
in
| 9| Ring
in
Hardware support
The serial interface hardware of DX-330F supports the following interface
features. Asynchronous clocks are used for each bit of a character, where the
clock requires he start and end bits as part of the character, allowing the
data sender and receiver to resynchronize between different characters. The
DX-330F adopts a half duplex transmission method, which allows the instrument
to act as either the data sender or the data receiver, but not both at the
same time. DX-330F does not support hardware handshake. Hardware handshake is
usually used to avoid data message string conflicts and ensure that no data is
delivered before the data receiver is ready. During the remote operation of
this instrument, appropriate software timing replaces hardware handshake, and
the user program must be fully responsible for the flow control and timing
involved.
character format
Characters are the smallest pieces of information in interface transmission.
Each character is 10 bits in length, including data bits and synchronization
bits. Using 8-bit data bits, 1-bit start bit and 1-bit stop bit for
synchronizing adjacent characters, without parity bits.
| Connector | 9 pins D type Plug（Female） |
|---|---|
| Connecting wiring | DCE |
| Data interface level | Sending and receiving using EIA |
level
Transmission length| Max. 15 meters length
Temporal format| Asynchronous, RS-232C electrical
format
Transmission mode| Half-duplex
BAUD| 19200, 57600 and 115200bps
Handshake| Software timing
Bits per character| 1-bit start, 8-bit data, and 1-bit stop
Parity bit| Parity NONE
End| CR(0DH)
Command rate| Max. 10 command per second
Change baud and send data
To use serial interface communication correctly, it is necessary to first set
the baud rate of DX-330F. Press the Menu key to enter the menu interface, use
the key to adjust to the UART option, press Enter to enter, and then press
the key to select the baud rate (which must be consistent with the computer
setting).
-
Real time transmission mode: Select the Rea ltime Transmit option and press Enter to exit the Gaussian meter. The data will be sent in real time in the following format: ＃土xxxx.xxxx/xxx/ 土xxxx>/n （The last two numbers are ＇＞＇ and one line break ）
Note : # represents the start flag, and/n represents the line break. The above data is sent in character format, with a single transmission length of 23 bytes. The data content is divided into three parts: the first part is the measured magnetic field value; The second part is the frequency of the current magnetic field, if it is a DC magnetic field, it displays 000; The third part is the probe temperature, represented by four digits, with the fourth digit being the decimal place.
Example : ＃－1 2345.6789/050/ +0234>/ n
The current measured Gaussian value is -1 2345.6789 (m T), the magnetic field frequency is 50Hz, and the probe temperature is+23.4 degrees Celsius. -
Save sending mode: select Transmit Saved, magnetometer send saved data, press Enter to send, finish, it would notice transmit over, press Enter to exit.
Fault diagnosis
The instrument is newly installed but communication has malfunctioned:
- Check the baud rate of the instrument.
- Confirm that the data transmission line (Tx) and data reception line (Rx) of the instrument are connected to the data reception line (Rx) and data transmission line (Tx) of the computer, respectively.
- Turn off the instrument and restart it to check if the solidified software inside the instrument is invalid.
- Turn off the computer and restart to see if the serial communication door is suspended.
- Confirm whether the baud rate of the instrument has been restored to its default value when restoring the factory default settings.
- Check all communication cable connections. Intermittent communication suspension:
Check if the communication cable connection is correct and if the length of the communication cable is within 15 meters
Computer Control Instruction List
Preset commands:
-
Query data
-
Function: Query real-time measurement data
-
Command format: “DATA?>”,
-
Return value: Real time measurement data Real time measurement data format: # X axis value I Y axis value I Z axis value>, for example: #+00387.1/-00598.5/+00256.9>represents x, and the magnetic field values in the y and Z directions are+38 7.1 nT, -598.5nT, and+256.9nT, respectively.
-
Turn off querying data
-
Function: Turn off querying real-time measurement data
-
Command format: “DATAC>”,
-
Query Unit
-
- Function: Query measurement units
-
Command format: “UNIT?>”,
-
Return value: “ACK”+measurement unit, measurement unit: “nT”
-
Set Unit
-
Function: Set the unit and change it one level up
-
Command format: “UNITSET>”,
-
Return value: “ACK“
-
Query upper threshold X-axis
-
Function: Query the threshold values on the X-axis
-
Command format: “UPTHRES? X>”
-
Return value: “ACK”+X-axis upper threshold value
-
Query upper threshold Y-axis
-
Function: Query the threshold values on the Y-axis
-
Command format: “UPTHRES? Y>”,
-
Return value: “ACK”+Y-axis upper threshold value
-
Check the Z-axis of the doorstep limit
-
Function: Query the Z-axis upper threshold value
-
Command format: ‘UPTHRES? Z>’
-
Return value: “ACK”+Z-axis upper threshold value
-
Query the lower threshold X-axis
-
Function: Query the X-axis lower threshold value
-
Command format: “LO WTHRES? X>”,
-
Return value: “ACK”+X-axis lower threshold value
-
Query the lower threshold Y-axis
-
Function: Query the Y-axis lower threshold value
-
Command format: “LO WTHRES? Y>”,
-
Return value: “ACK”+Y-axis lower threshold value
-
Query the lower threshold Z-axis
-
Function: Query the Z-axis lower threshold value
-
Command format: “LOWTHRES? Z>”,
-
Return value: “AC K”+Z-axis lower threshold value
-
Zeroing
-
Function: Simultaneously reset the usage values of three axes to zero
-
Command format: “ZERO>“
-
Return value: “ACK“
-
X axis upper threshold setting
-
Function: Set the threshold value on the X-axis
-
Command format: “X-UPTHRES+/- xxxxx>“
-
Return value: “ACK“
For example, ‘UPT H RES+3000.00>’ sets the threshold value on the X-axis to+3 0000 -
X-axis lower threshold setting
-
Function: Set the X-axis lower threshold value
-
Command format: X-LOWTHRES+/- xxxxx>“
-
Return value: “ACK“
For example, ‘X-LO WTHRES-3000.00>’, which sets the lower threshold value of the X-axis to -30000 -
Y-axis upper threshold setting
-
Function: Set the Y-axis upper threshold value
-
Command format: “Y – UPT H RES+/- xxxxx>“
-
Return value: “ACK“
-
Y-axis lower threshold setting
-
Function: Set the Y-axis lower threshold value
-
Command format: “Y – LO WTHRES+/- xxxxx>“
-
Return value: “ACK
-
Z-axis upper threshold setting
-
Function: Set the Z-axis upper threshold value
-
Command format: “z – UPTH RES+/- xxxxx>“
-
Return value: “AC K“
-
Z-axis lower threshold setting
-
Function: Set the Z-axis lower threshold value
-
Command format: “Z_LOWTHRES+/- xxxxx>
-
Return value: “AC K“
-
High speed 25 queries per second
-
Function: Query high-speed real-time measurement data 25 times per second
-
Command format: “DATAH 25>”,
-
Return value: 25 times/second real-time measurement data Real time measurement data format: # X axis value/Y axis value I Z axis value>,
for example: #+000387.1/-000598.5/+000256.9>represents x and Y, and the magnetic field values in the Z direction are+38 7.1nT, -598.5nT, and+256.9nT, respectively. -
High speed 50 times/second data query
-
Function: Query high-speed real-time measurement data 50 times/second
-
Command format: “DATAH 50>”,
-
Return value: 50 times/second real-time measurement data
Real time measurement data format: # X axis value/Y axis value I Z axis value>,
for example: #+00387.1/-00598.5/+00256.9>represents X, and the magnetic field values in the Y and Z directions are+38 7.1nT, -598.5nT, and+256.9nT, respectively. -
High speed 75 times/second data query
-
Function: Query high-speed real-time measurement data 75 times per second
-
Command format: “DATAH 75>”,
-
Return value: 75 times/second real-time measurement data
Real time measurement data format: # X axis value/Y axis value I Z axis value>,
for example: #+000387.1/-000598.5/+000256.9>represents X, and the magnetic field values in the Y and Z directions are+38 7.1nT, -598.5nT, and+256.9nT, respectively. -
High speed 100 times/second data query
-
Function: Query high-speed real-time measurement data 100 times/second
-
Command format: “DATAH100>“
-
Return value: Real time measurement data of 100 times per second Real time measurement data format: # X axis value/Y axis value I Z axis value>,
for example : #+000387.1/-000598.5/+000256.9>represents X, and the magnetic field values in the Y and Z directions are+38 7.1nT, -598.5nT, and+256.9nT, respectively. -
High speed 150 times/second query of user data
-
Function: Query high-speed real-time measurement data 150 times/second
-
Command format: “DATAH 150>”,
-
Return value: 150 times/second real-time measurement data Real time measurement data format: # X axis value/Y axis value I Z axis value>, for example: #+000387.1/-000598.5/+000256.9>represents X, and the magnetic field values in the Y and Z directions are+38 7.1nT, -598.5nT, and+256.9nT, respectively.
-
High speed 200 times/second data query
-
Function: Query high-speed real-time measurement data 200 times/second
-
Command format: “DATAH 200>”,
-
Return value: 200 times/second real-time measurement data
Real time measurement data format: # X axis value/Y axis value/Z axis value>,
for example: #+000387.1/-000598.5/+000256.9>represents X, and the magnetic
field values in the Y and Z directions are+38 7.1nT, -598.5nT, and+256.9nT, respectivel
Software connection and communication
The DX-330F uses a 9-pin serial port (RS232) to communicate with the computer. Serial port connection: If the computer has an RS232 serial port, it can be directly connected to the Gaussian meter using a serial port cable. If the computer does not have an RS232 serial port, it needs to be connected using a USB to RS232 device for conversion. The software interface is shown as above figure.
Communication settings
- Port selection : Open the software and find the [Port selection] dropdown box. All available COM port numbers on your computer will be listed in the dropdown box. Select the corresponding port, and the software will directly attempt to open the port. If the prompt indicates that the opening failed, please check if any running programs on your computer have occupied the port. Or log off or restart the computer after saving your work process. If you do not know the serial port of this computer, you can check it by right clicking “My Computer” ->Management ->Device Manager ->Port (COM and LPT), as shown in Figure following, COMS is an RS232 connection port. Instrument type: Select the user data collected by the software, and select a one-dimensional Gaussian meter here.
- Communication method: DX-330F uses “serial port” communication method.
After setting the port and instrument type correctly, click the “Start” button
and the software will start collecting data and drawing graphics. In the data
display area, we can choose to manually record the data once or check
“Continuous Record” for data collection, as shown in the following
figure:
After switching the data collection window to the settings window, we can perform some settings to better perform data collection, as shown in the following figure:
Of course, changes in acquisition speed will correspondingly affect the resolution and measurement accuracy of the Gaussian meter. The following table lists the impact of acquisition speed on the resolution and measurement accuracy of the Gaussian meter for user reference.
Acquisition
frequency（Hz）
| Resolution
（mT）
| Maximum fluctuation
without load（mT）
| Test accuracy（%）
---|---|---|---
Normal speed| ±0.00001| 0.00001| 0.05
20| ±0.001| 0.006| 0.01
50| ±0.001| 0.009| 0.015
100| ±0.01| 0.05| 0.02
200| ±0.1| 0.14| 0.15
200+| ±0.1| 0.16| 0.15
Monitoring Analog Outputs
The DX-330F uses a BNC connector on the rear panel to provide a monitoring analog output, with the core wire being the signal and the shell being the ground. The monitoring analog output voltage range is ± 3.0V, and the corresponding magnetic field range is ± 3.0T (± 30kG) or ± 30T (± 300kG). The monitoring analog output voltage is not affected by the display unit. There is an electrical connection between the BNC connector housing and the chassis body, but there may be unequal potentials. Shorting the BNC connector housing to the chassis body may affect the analog output accuracy BBBBBBBBBBBBBBBBor cause instrument damage.