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Lake Shore Cryotronics F41, User Manual

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Lake Shore Cryotronics F41 User Manual Download Page 60

52

 

c

HAPTER

 4: 

Computer Interface Operation

F71/F41 Teslameter

4.3  Status and 
Error Reporting

4.3.1 Status System 
Overview

The F71/F41 teslameter implements a status system compliant to the SCPI-99 stan-
dard. The SCPI status system is derived from the status system called out in 
Chapter 11 of the IEEE 488.2 standard. The status system provides a method of 
recording and reporting instrument information. At the center of the status system is 
the status byte register. This register contains summary bits from other status regis-
ters, providing the user one register to periodically query to determine if further 
interrogation of the instrument is required. 

In addition to the status byte and its complementary service request enable register, 
the status system is made up of standard, questionable, and operation status register 
sets. Each one of those register sets comprises three types of registers: condition, 
event, and enable. In addition, the status system contains an output buffer and error 
queue. A diagram of the status system is shown below.

4.3.1.1 Status Byte Register

The status byte register, typically referred to as the status byte, is a non-latching, 
read-only register that contains all of the summary bits from the register sets. The 
status of the summary bits are controlled from the register sets as explained in
section 4.3.2.1 to section 4.3.2.5. The status byte also contains the Master Summary 
Status (MSS) bit. This bit is used to report if any of the summary bits are set via the 
*STB? command. The status of the MSS bit is controlled by the summary bits and the 
service request enable register.

FIGURE 4-1   

F71/F41 teslameter status system

=
=
=
=
=
=

OSB
MSS
ESB
MAV
QSB
EAV

Operation summary bit
Master summary status bit
Event status summary bit
Message available summary bit
Questionable summary bit
Error available summary bit

AND

OR

OR

OR

OR

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

Not 

used

Not 

used

PON

CME

EXE

DSE

QYE

OPC

7

6

5

4

3

2

1

0

Not 

used

Not 

used

PON

CME

EXE

DSE

QYE

OPC

7

6

5

4

3

2

1

0

Not 

used

Not 

used

OSB

ESB

MSS

MAV

QSB

EAV

7

6

5

4

3

2

1

0

Not 

used

Not 

used

OSB

ESB

MSS

MAV

QSB

EAV

7

6

5

4

3

2

1

0

15 14 13 12 11 10 9

8

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

NDBA RMPD

RNIG OVRL NOPR

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

NDBA RMPD

RNIG OVRL NOPR

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

NDBA RMPD

RNIG OVRL NOPR

7

6

5

4

3

2

1

0

15 14 13 12 11 10 9

8

7

6

5

4

3

2

1

0

15 14 13 12 11 10 9

8

7

6

5

4

3

2

1

0

Not 

used

Not 

used

Not 

used

15 14 13 12 11 10 9

8

Not 

used

Not 

used

Not 

used

HBT

CAL

SENY

SENZ

EER

TCP

PRO

FCSR

FCO

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

HBT

CAL

SENY

SENZ

EER

TCP

PRO

FCSR

FCO

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

Not 

used

HBT

CAL

SENY

SENX

SENX

SENX

SENZ

EER

TCP

PRO

FCSR

FCO

7

6

5

4

3

2

1

0

15 14 13 12 11 10 9

8

7

6

5

4

3

2

1

0

15 14 13 12 11 10 9

8

7

6

5

4

3

2

1

0

Output 

buffer

Error 

queue

Read by

 *STB?

Questionable Condition Register
STATus:QUEStionable:CONDition?

Questionable Event Register
STATus:QUEStionable[:EVENt]?

Questionable Event Enable Register
STATus:QUEStionable:ENABle
STATus:QUEStionable:ENABle?

Operation Event Enable Register
STATus:OPERation:ENABle
STATus:OPERation:ENABle?

Operation Event Register
STATus:OPERation[:EVENt]?

Operation Condition Register
STATus:OPERation:CONDition?

Service request 

enable register 

 

*SRE, *SRE?

Status byte register 

 *STB?

Standard event 

status register 

 *ESR?

Standard event status 

enable register 

 *ESE, *ESE?

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

— Bit

— Name

=
=
=
=
=
=

PON
CME
EXE
DSE
QYE
OPC

Power on
Command error
Execution error
Device specific error
Query error
Operation complete

=
=
=
=
=

NDBA
RMPD
RNIG
OVRL
NOPR

No data (breakout adapter)
Ramp done
Ranging
Overload
No probe

=
=
=
=
=
=
=
=
=
=

HBT
CAL
FCO
FCSR
PRO
TCP
EER
SENZ
SENY
SENX

Heartbeat error
Calibration error
Field control overload
Field control slew rate limit
Invalid probe
Temperature compensation error
EEPROM read error
Sensor error Z
Sensor error Y
Sensor error X

AND

AND

AND

AND

AND

AND

AND

AND

AND

AND

Summary of Contents for F41

Page 1: ... No government or other contractual support or relationship whatsoever has existed which in any way affects or mitigates proprietary rights of Lake Shore Cryotronics Inc in these developments Methods and apparatus disclosed herein may be subject to U S Patents existing or applied for Lake Shore Cryotronics Inc reserves the right to add improve modify or withdraw functions design modifications or p...

Page 2: ...hore undertakes no responsibility that the products will be fit for any particular purpose for which you may be buying the Products Any implied warranty is limited in duration to the warranty period No oral or written information or advice given by the Company its Agents or Employees shall create a warranty or in any way increase the scope of this limited warranty Some countries states or province...

Page 3: ...as result of any changes made to the firmware FIRMWARE LICENSE AGREEMENT CONTINUED Under the terms of this agreement you may only use the firmware as physically installed in the instrument Archival copies are strictly for bidden You may not decompile disassemble or reverse engineer the firmware If you suspectthere are problems with the firmware return the instrument to Lake Shore for repair under ...

Page 4: ...ject of the declaration described above is in conformity with the relevant Union harmonization legislation 2014 53 EU Radio Equipment Directive References to the relevant harmonized standards used to the specification in relation to which conformity is declared full or in part EN 62368 1 2014 Overvoltage Category II Pollution Degree 2 EN 301 489 17 V3 2 0 2017 EN 301 489 1 V2 1 1 2017 EN 61000 3 2...

Page 5: ...ere should be no degradation in EMC performance Exposure to RF interference greater than that found in a typical laboratory environment may disturb the sensitive measurement circuitry of the instrument Pay special attention to instrument cabling Improperly installed cabling may defeat even the best EMC protection For the best performance from any precision instrument follow the grounding and shiel...

Page 6: ...eter contains the following certification numbers FCC ID TFB TIWI 01 IC 5969A TIWI101 This device is granted for use in mobile only configurations in which the antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and not be co located with any other transmitters except in accordance with FCC and Industry Canada multi transmitter p...

Page 7: ...er 13 3 3 Display Overview 13 3 3 1 Home Screen 13 3 4 Basic Operation 14 3 4 1 Measurement Modes 14 3 4 2 Averaging Window 16 3 4 3 Autorange and Range Selection 17 3 4 4 Field 18 3 4 5 Frequency AC modes only 18 3 4 6 Max Hold Function 19 3 4 7 Relative Measurement 19 3 4 8 Temperature Measurement 20 3 4 9 Screen Lock 20 3 5 Advanced Operation 21 3 5 1 Sensor Information 21 3 5 2 Field Control o...

Page 8: ...P 66 4 5 Command Summary 67 4 5 1 Common Commands 67 4 5 2 SCPI Subsystem Commands 70 Chapter 5 Probes and Accessories 5 1 General 77 5 2 Models 77 5 3 Accessories 77 5 4 Rack Mounting 78 5 4 1 Full Rack Mounting 78 5 4 2 Half Rack Mounting 79 Chapter 6 Service 6 1 General 81 6 2 General Troubleshooting 81 6 3 USB Troubleshooting 81 6 3 1 New Installation 81 6 3 2 Existing Installation No Longer W...

Page 9: ... F41 teslameters include D DC and RMS measurement D Peak to peak measurement D Autoranging D Variable averaging window D Min Max hold D Relative readings D Temperature compensation D Frequency measurement of field D TruZero technology to reduce measurement noise and offset D TiltView touchscreen for improved viewing angles D Smaller ultra thin Hall sensor active areas for improved accuracy D Multi...

Page 10: ... and industry standard SCPI commands D USB computer interface provides direct serial communication by emulating a standard RS 232 connection D Ethernet allows full control and reporting throughout an IP network D WLAN Wi Fi provides wireless access for web applications 1 4 Hall Probe Selection Full details on FP Series probes are provided on our website Please see https www lakeshore com products ...

Page 11: ...eters f71 and f41 teslameters Feature Description Power requirement 100 V to 240 V universal input 50 Hz to 60 Hz 30 VA Size 216 mm wide 87 mm high 369 mm deep 8 5 in 3 4 in 14 5 in half rack Weight 3 2 kg 7 lb Approval CE mark FCC Giteki mark Operating conditions Rated accuracy 18 C to 28 C 70 relative humidity non condensing Reduced accuracy 20 C to 70 C 90 relative humidity non condensing TABLE...

Page 12: ...ng plug of the power cable meet Underwriters Laboratories UL and International Electrotechnical Commission IEC safety standards Ventilation The instrument has ventilation holes in its side covers Do not block these holes when the instrument is operating Do Not Operate in an Explosive Atmosphere Do not operate the instrument in the presence of flammable gases or fumes Opera tion of any electrical i...

Page 13: ...le insulation or reinforces insulation equivalent to Class II of IEC 536 see Annex H CAUTION High voltages danger of electric shock background color yellow symbol and outline black CAUTION or WARNING See instrument documentation background color yellow symbol and outline black Off supply On supply Frame or chassis terminal Protective conductor terminal Earth ground terminal 3 Three phase alternati...

Page 14: ...6 cHAPTER 1 Introduction F71 F41 Teslameter ...

Page 15: ...ged shipping materials and contents until instructed to either return or discard them Open the shipping container and keep the container and shipping materials until all contents have been accounted for Check off each item on the packing list as it is unpacked Instruments themselves may be shipped as several parts The items included with the F71 F41 teslameter are listed below Contact Lake Shore i...

Page 16: ...he screen and operating the touch interface comfortable from any angle even when mounted in a rack The screen adjusts from a 0 to a 47 viewing angle whether mounted in a rack or on a bench top FIGURE 2 1 F71 F41 teslameter front panel Connector Description 1 Power button The power button turns the instrument power on and off 2 TiltView touchscreen The screen adjusts from a 0 to a 37 viewing angle ...

Page 17: ...communications inter face The USB interface is provided to connect with most modern com puters 5 RJ 45 Ethernet interface The Ethernet interface is provided to allow connection to a com puter network 6 WLAN antenna connector The Wi Fi antenna attaches to this coax connector 7 Digital I O port For general purpose input output connection or trigger output functionality More information is provided i...

Page 18: ... are adding the option card yourself 2 4 2 Line Input Assembly This section describes how to properly connect the F71 F41 teslameter to line power Please follow these instructions carefully to ensure proper operation of the instru ment and the safety of operators 2 4 2 1 Power Cord The F71 F41 teslameter includes a 3 conductor power cord that mates with the IEC 320 C14 line cord receptacle Line vo...

Page 19: ...ected the instrument reads parameters from probe memory and the probe is ready to use A new probe can be connected at any time even while the instrument is turned on 2 4 4 1 Probe Handling To avoid damage and for best results during use probes have a number of handling and accuracy requirements that must be observed Some probes used with the teslameter have conductive parts Never probe near expose...

Page 20: ... set ting can be configured through the front panel or through the remote interfaces Connect an oscilloscope or data acquisition system to the output BNC to analyze the readings The shell of the analog output BNC is connected directly to the instrument ground Connecting it incorrectly could cause additional noise in the measurement or dam age to the electronics The analog output can provide up to ...

Page 21: ...n turning back on 3 3 Display Overview This section describes the various displays of your teslameter 3 3 1 Home Screen When the teslameter is turned on the Home screen is displayed The screens you see may differ depending on your software version Some screens are scrollable Power mode Powerbutton LED Enter mode by Return to ON by ON On Plug the instrument into an outlet N A SLEEP Slow pulse Short...

Page 22: ... DC measurement mode the display shows the measured DC field the DC max hold and the DC relative mea surement 3 4 1 2 AC Measurement Mode AC mode offers the highest level of accuracy for periodic fields However it is only capable of measuring accurately over a limited range of frequencies This is because AC mode uses the TruZero measurement technique delivering improved accuracy at the expense of ...

Page 23: ...ted data For example In AC mode a 1 Hz signal requires a 10 s averaging window for accurate measure ment In some applications this may be too slow Instead DC mode with an averaging window of 10 ms will provide 100 samples per signal period 3 4 1 3 High Frequency Measurement Mode High frequency HF mode sacrifices accuracy and the ability to measure DC values to take measurements as fast as possible...

Page 24: ... rate D Adjusting the accuracy of the AC and DC components of a measurement in AC mode section 3 4 1 2 D Setting the measurement buffer interval when using the streaming data buffer feature over SCPI section 3 5 3 The fundamental measurement for the teslameter is 10 ms with all averaging win dows being an average of a certain number of these 10 ms measurement steps For example the 200 ms window av...

Page 25: ...et 3 4 3 Autorange and Range Selection The F71 F41 teslameter is equipped with an autoranging feature that will automati cally select the appropriate range for the measured field In some cases it may be desirable to manually select the field range Autorange and manual range selection are accessible from the Range quick access setting When manually selecting a range for an AC field in AC or high fr...

Page 26: ... defined as the square root of the sum of the squares of the three axes measurements This is also known as the vector sum The figure below shows an example of the display in AC mode 3 4 5 Frequency AC modes only Frequency is calculated by counting DC value crossings This value is most accurate when measuring a fairly consistent AC signal with a strong fundamental frequency and amplitude greater th...

Page 27: ...to the RMS reading in the AC and high frequency modes The relative measurement does not interact with other features at this time Touch the Tare button on the screen to capture the present reading and set it as a new baseline It is also possible to manually set a baseline through the detail screen Touch the Clear button to set the baseline to zero TIP This feature can be used to remove the small a...

Page 28: ...more information on temperature compensation see section 3 5 6 3 4 9 Screen Lock The screen lock feature prevents accidental changes to parameter values When the screen is locked some parameter values may be viewed but not changed from the front panel To lock the screen 1 Tap the action icon three dots in the top right corner of the screen A drop down menu appears 2 Tap Lock A message indicating t...

Page 29: ...c probe assigned during manufacturing Probe type Construction Information about the mechanical design of the probe Sensor type Family Variant The material family of the sensor Sensor orientation The direction the sensor is facing relative to the stem Sensitivity Nominal sensitivity of the Hall sensor s in the probe at the probe s operating exci tation current Thermistor present Indicates whether t...

Page 30: ...ield control settings can be accessed through the Settings menu top left corner of the screen 3 5 2 1 Power Supply Protection Magnet power supplies can be damaged by a control voltage that is too large or by rapid changes in the control voltage It is important to put limits on these values to avoid these problems 3 5 2 1 1 Voltage Limit The full span of the field control option card is 10V However...

Page 31: ...it will be used even when a step change is requested including when disabling field control while actively controlling 3 5 2 2 Open Loop Mode In Open Loop mode the control output voltage of the field control option card can be set directly by the user This can be helpful in testing and characterizing the field con trol system before moving to Closed Loop control FIGURE 3 15 Field control limits FI...

Page 32: ...roportional setting is part of the overall control loop gain and so are the magnet magnet gap and power supply characteristics The pro portional setting will need to change if the hardware changes 3 5 2 3 2 Tuning Proportional The proportional setting is tied to the overall gain of the system The gain of the power supply should be fairly constant over its entire range of operation but the gain of ...

Page 33: ...tting that is too low causes the field to take too long to reach the setpoint An integral setting that is too high can create overshoot which cannot be tolerated in many magnetic systems An integral setting that is very high will eventually cause the field to oscillate Begin this part of the tuning process using the proportional setting found above and enter an I setting of 100 If the field begins...

Page 34: ...0 disables ramping Changes to the setpoint will behave like step changes Tap Field on the Home screen to go to the detail screen where the PI values and set point can be configured While the ramp rate is being set Ramping will display on the detail screen and on the Home screen Swipe up on the screen to reveal the Advanced Settings button which returns to the Field control Overview screen A voltag...

Page 35: ...ownloads fast magnetic field mapping with f series teslameters pdf sfvrsn 6284a805_6 3 5 4 Analog Output The analog output can provide voltage proportional to D The raw amplified Hall voltage D The corrected field reading Be sure to connect the analog output to a high impedance input or it may interfere with the sensitive measurement circuitry 3 5 4 1 Corrected Field Reading Setting the analog out...

Page 36: ...DC or AC modes will result in a modulated signal that won t be useful Due to the raw nature of this signal the voltage level will not predictably relate to the actual applied field The best method for calculating the ratio between field and gen erated output voltage is to measure the voltage directly and compare it to the peak values that have gone through all the correction required for a more ac...

Page 37: ...directly interface with a wide range of sys tems The pin assignments can be found in the table below Each input and output can be configured to provide a different function The available functions are listed in TABLE 3 2 The digital I O connections are differential and isolated from the rest of the instrument circuitry This allows the teslameter to connect to a wide variety of I O networks without...

Page 38: ...on 4 5 2 or through the Digital I O menu option in the Settings menu The available functions are D None the state of the input does not affect the state of the instrument The state of the inputs is synchronized with the field data and can be queried through a remote connection Tip Query the field data and input state at the same time to align field readings with an external action that is tied int...

Page 39: ...e most recent value 3 5 5 3 Outputs The DIGital OUTput FUNCtion command is used to configure a specific out put relay or through the Digital I O menu option in the Settings menu The DIGital OSETting command is used to configure the state of an output pin that is configured for manual mode Interface Commands DIGital OUTput FUNCtion DIGital OSETting FIGURE 3 23 Input diagram FIGURE 3 24 Input sync d...

Page 40: ...ailable when using non standard probes that do not contain a temperature sensor or when operating at a temperature beyond the range of the temperature sensor In the Temperature tab change the compensa tion Source from Temperature Sensor to Manual This will reveal the Compensation setting which must be set to the temperature at which the Hall probe sensor is oper ating The manual compensation tempe...

Page 41: ...yogenic operation The feature can be disabled on the Measurement Setup screen The sensitivity of the sensor changes slightly with temperature Use manual tem perature compensation section 3 5 6 when operating in a cryogenic environment 3 5 8 Probe High Frequency Operation When measuring AC fields with frequencies greater than a few thousand hertz small loop areas in the probe will generate inductiv...

Page 42: ...9 System settings About tab Field Description Model number This field displays the model number Product name This field will always display Teslameter Serial number The unique identifier for this specific teslameter assigned during manufacturing Firmware version The semantic version number assigned to the Lake Shore Firmware LSFW pack age presently running Calibration date The date and time the te...

Page 43: ...imize the life of the display The half life of the display is rated with a typical value of 30 000 hours In addition to help further maximize the life of the dis play the teslameter implements an auto dimming function when the display has not been touched for a prolonged period of time FIGURE 3 30 System settings Connectivity tab Field Description Wifi Enables Wi Fi connectivity Ethernet Touch the...

Page 44: ... cations to which the F71 F41 teslameter adheres In addition the attribution notices for the open source software used in the teslameter are listed here 3 5 9 5 Update See section 3 5 11 for information on firmware updates 3 5 9 6 Privacy If enabled and an internet connection is present the instrument will periodically send usage statistics and crash reports to identify problems that could be addr...

Page 45: ...n nonvolatile memory and can be cleared without affecting instrument calibration 3 5 10 1 Default Settings Settings are not stored in non volatile memory Therefore the table below can be considered a listing of both the power on and the default settings Issuing a RST to the teslameter will also return the settings to the power on state listed below FIGURE 3 32 Date and time Setting Default first p...

Page 46: ...n is called the local repository This allows you to downgrade firmware should you choose since older versions will still remain on the teslameter in the local repository In addition Lake Shore maintains LSFW packages on a network server that allows us to deploy those packages to all teslameter custom ers This is called the remote repository Lake Shore recommends enabling the Notify when updates ar...

Page 47: ...teslameters f71 and f41 teslameters to download the firmware 2 Enter your name and e mail address so that we can keep you updated on any new firmware for your instrument 3 Insert the USB stick into your computer and copy the downloaded teslameter LSFW package to the root directory of the USB stick 4 Remove the stick from the computer and insert it into the USB Type C port of the teslameter 5 On th...

Page 48: ...der the influence of an external driving electric field When exposed to a magnetic field these moving charged particles experience a force perpendicular to both the velocity and magnetic field vectors This force causes the charging of the edges of the conductor one side positive with respect to the other This edge charging sets up an electric field which exerts a force on the moving electrons equa...

Page 49: ...tioned to measure fields running perpendicularly through the probe stem This is most useful for measuring fields inside magnet gaps These probes are easily identified by their flattened rectangular stem 3 6 2 2 2 Axial The sensor is placed very near to the tip of the probe and aligned to measure fields normal to the tip of the probe This orientation is helpful when measuring inside solenoids and c...

Page 50: ...m of the standard probe is removed exposing the PCB and sensor element This results in a somewhat flexible stem that is also thinner than the standard stem type making it the best probe for measuring in very thin magnet gaps This stem also features a helpful ruler printed directly on the PCB which is useful in determining how far the probe has been inserted into the mag net gap Excessive bending m...

Page 51: ...h single and multi axis probes This connector also includes an EEPROM that contains probe calibration data allowing the probe to be recognized by the teslameter after being connected 3 6 3 Installation 3 6 3 1 Packaging Retain any shipping carton s in which equipment is originally received in the event that any equipment needs to be returned to Lake Shore for periodic recalibration Probes damaged ...

Page 52: ...ion are not required the holes can be used in lieu of the locating pins These through holes are sized for M2 fasteners with socket heads Fasteners with larger heads may not fit into the recess provided for the screw head Ensure screws have heads less than 4 mm in diameter and sit flat against the probe surface i e are not counter sunk 3 6 3 2 3 Probe Orientation Mountable probes have the Lake Shor...

Page 53: ...l connection This will result in a probe read error Unplug the probe from the teslameter and try the connection again If the problem persists please contact Lake Shore Service As soon as the probe suc cessfully connects field values will be displayed on the screen D Remove the connector by squeezing both sides of the connector to release the latching mechanism D Probes are hot swappable probes can...

Page 54: ...cated On the oppo site side of the probe a target indicator is painted on the PCB to show the active area when the sensor is facing away from the operator The active area of the sensing element is on the surface of the chip where it meets the stem PCB This means the hot side of the probe contains the Hall effect chip and the cold side contains the target indicator 3 6 4 1 2 Transverse Flexible Thi...

Page 55: ...n of the probe will determine whether readings are positive or negative 3 6 4 2 1 Transverse Polarity can easily be confused on transverse probes as twisting the probe 180 will result in a reversed polarity When looking at the tip of a transverse probe a positive field value will be reported when the magnetic field is orientated as shown below When placed in magnet gaps the tip of the probe may no...

Page 56: ... this situation the handle will be less useful that look ing directly at the stem tip where active area location and axis labels are laser engraved D X axis positive field reading when field passes through the probe from the side marked with X to the side without an X D Y axis positive field reading when field passes through the probe from the side marked with Y to the side without a Y D Z axis po...

Page 57: ...ing test and measurement instru ments SCPI provides instrument control with a standardized command syntax and style The following sections provide a brief overview of the SCPI language syntax and behavior that will allow a new instrument user to get up and running quickly The complete SCPI specification can be found on the IVI website http www ivifoundation org docs scpi 99 pdf 4 2 1 Command Types...

Page 58: ...der is enclosed in brackets then it is optional Do not include the brackets if you send the optional command to the instrument For example the fol lowing command messages are both valid FETCh FIELd DC MAGNitude FETCh DC 4 2 4 Short and Long Form SCPI specifies a short and long form for its command headers The command header is completely spelled out in the long form while it is abbreviated to the ...

Page 59: ... The instrument also allows an optional carriage return hex 0D decimal 13 to precede the line feed 4 2 8 Message Flow Control It is important to remember that the user program is in charge of SCPI communica tion at all times independent of the communications bus used to control the instru ment The instrument cannot initiate communication determine which device should be transmitting at a given tim...

Page 60: ...XE DSE QYE OPC 7 6 5 4 3 2 1 0 Not used Not used OSB ESB MSS MAV QSB EAV 7 6 5 4 3 2 1 0 Not used Not used OSB ESB MSS MAV QSB EAV 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used NDBA RMPD RNIG OVRL NOPR Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used Not used NDBA RMP...

Page 61: ...gis ter determines which bits in the corresponding event register will set the summary bit for the register set in the status byte The user may write to or read from an enable register Each event register bit is logically ANDed to the corresponding enable bit of the enable register When an enable register bit is set by the user and the correspond ing bit is set in the event register the output sum...

Page 62: ...st Service RQS bit In this case when the RQS MSS bit would be set the service request hardware line would go high indicating to the controller on the bus to query the status byte Since the F71 F41 teslameter does not have a GPIB interface this bit is strictly referred to as the MSS bit D Summary ESB Bit 5 this bit is set when an enabled standard event has occurred D Message Available MAV Bit 4 thi...

Page 63: ...t the instrument could not interpret the command due to a syntax error an unrecognized header unrecognized termina tors or an unsupported command D Execution Error EXE Bit 4 this bit is set if an execution error has been detected This occurs when the instrument is instructed to do something not within its capabilities A typical example of this are command parameters that are outside the instrument...

Page 64: ...upper limit of the present range setting D Probe Not Connected NOPR Bit 0 indicates that there is not a probe connected to the instrument FIGURE 4 3 Standard event status register FIGURE 4 4 Operation event status register OR AND AND AND AND AND AND Not used Not used PON CME EXE DSE QYE OPC 7 6 5 4 3 2 1 0 Not used Not used PON CME EXE DSE QYE OPC 7 6 5 4 3 2 1 0 Standard event status register ESR...

Page 65: ...4 indicates that the connected probe has built in temperature compensation but the instrument cannot read the tem perature sensor D EEPROM Read Error EER Bit 3 indicates that the instrument is unable to read the EEPROM memory of the connected probe D Sensor Error Z SENZ Bit 2 indicates that the instrument detects that there is an open circuit on the Z channel there is not a connection with the sen...

Page 66: ...riod of time issuing the SYSTem ERRor NEXT query will return the message that was added to the queue first and subsequently remove it from the queue For further details on these error query commands see section 4 5 SCPI 99 categorizes its standard errors into logical groups that match bit definitions in the standard event status register When the teslameter adds an error message to the queue a bit...

Page 67: ...ble to be used to connect the teslameter to a host PC The pin assignments for A type and B type connectors are shown in section 6 7 The maximum length of a USB cable as defined by the USB 2 0 standard is 5 m 16 4 ft This length can be extended using USB hubs every 5 m 16 4 ft up to five times for a maximum total length of 30 m 98 4 ft 4 4 1 2 Hardware Support The USB interface emulates an RS 232 s...

Page 68: ...ows Download the driver 1 Locate the USB driver on https www lakeshore com software 2 Right click on the USB driver download link and select Save as 3 Save the driver to a convenient place and take note where the driver was down loaded Extract the driver The downloaded driver is in a ZIP compressed archive The driver must be extracted from this file Windows provides built in support for ZIP archiv...

Page 69: ...ows has successfully updated your driver software should appear Click Close to com plete the installation 4 4 2 Ethernet and Wi Fi The Ethernet and Wi Fi interfaces provides a means of connecting the F71 F41 teslameter to an Ethernet or Wi Fi based computer network These net works provide the ability to communicate across large distances often using existing equipment the internet pre existing loc...

Page 70: ...ng selection of either DHCP or static IP 1 Enter the network password then navigate to the upper right part of the screen and tap Connect 2 To connect to a network that is not displaying its SSID the network must be added manually This can be done by touching Other network at the bottom of the available network list or by tapping the action icon three dots in the top right corner of the screen and...

Page 71: ...length Network prefix is an alternative way to present the subnet mask For example a network prefix length of 16 translates to a subnet mask of 255 255 0 0 while prefix length of 8 translates to a subnet mask of 255 0 0 0 Finally the Wi Fi connection can be enabled This is done by touching the Wi Fi enable switch If the connection is successful the status will change to Connected FIGURE 4 9 Networ...

Page 72: ...umber from 0 to 255 D Subnet Mask a sub network or subnet is a group of devices within a network that have a common designated IP address routing prefix A subnet mask is a 32 bit bit mask that signifies which part of the IP address represents the subnet rout ing prefix and which part represents the device s address on the subnet A subnet mask is most often given in dotted decimal notation such as ...

Page 73: ...ssibility of being automatically reconfigured when the DHCP lease expires Contact your net work administrator to find out the DHCP lease policy on your network Static IP Static IP is a method of manually configuring the IP address subnet mask and gateway of network enabled devices When using the Static IP method the IP address subnet mask and gateway must be configured appropriately for the con ne...

Page 74: ...rt number used for TCP socket connections on the teslameter is 7777 by default The port number can be configured from the Connectivity screen in System settings top left corner of the screen 4 4 3 SCPI over TCP There may be scenarios where the user desires to have the teslameter connected to the internet but does not want anyone to be able to connect to the teslameter and start controlling it The ...

Page 75: ...a 0 255 Example ESE 32 Remarks Sets the standard event status enable register bits The parameter when rounded to an integer value and expressed in base 2 represents the bit values of the standard event status enable register An out of range parameter will cause an execution error ESE Query Format ESE Remarks Returns the current contents of the standard event status enable bits The returned value i...

Page 76: ...OPC Query Format OPC Remarks Places an ASCII character 1 into the device s output queue when all pending selected device operations have been finished This query allows synchronization between a controller and a device using the MAV bit in the status byte or a read of the output queue NOTE Unlike the OPC command the OPC query does not affect the OPC event bit in the ESR RST Command Format RST Rema...

Page 77: ...1 When converted to binary the response rep resents the current bit values of the standard request enable register Bit 6 will always be zero STB Query Format STB Remarks Returns the status byte and master summary status bit The returned value is defined as a NR1 NUMERIC RESPONSE DATA element in the range of 0 255 When expressed in binary the response represents the bit values of the status byte re...

Page 78: ... 10ms sam ples Configures the length of the averaging window Command Parameter s Description SYSTem AUTODATETIME Returns whether the instru ment automatically sets the date and time when con nected to the internet SYSTem AUTODATETIME Boolean 0 FALSE 1 TRUE Sets whether the instrument automatically sets the date and time when connected to the internet SYSTem BEEPer VOLume Returns the volume setting...

Page 79: ... the RMS measurement of the total magnitude a spe cific axis or all axes Not avail able in DC mode FETCh FREQuency Returns the dominant fre quency Not available in DC mode FETCh PEAK MAGNitude X Y Z ALL Returns the peak to peak mea surementofaspecificaxisorall axes Not available in DC mode FETCh CRESt MAGNitude X Y Z ALL Returns the crest factor of a specific axis or all axes Not available in DC m...

Page 80: ...Eline field value Configures the baseline field value SENSe MRESet Resets the max and min hold values to the pres ent reading SENSe AVERage COUNt Returns the number of 10 ms samples in the averaging window SENSe AVERage COUNt DEFault MAXimum MINimum integer number of 10ms samples Configuresthelengthof the averaging window Default value is 20 200 ms SENSe TCOMpensation TSOurce Returns the tempera t...

Page 81: ...magnitude Command Parameter s Description DIGital IDATa Returns the integer representation of the input states DIGital INPut FUNCtion Returns the present function for input DIGital INPut FUNCtion NONE MRESet Configures the function of the input NONE does no action MRESet resets the max and min hold values when the input transi tions high DIGital OUTPut FUNCtion DIGital OUTPut FUNCtion MANual FCRam...

Page 82: ...ensor orientation PROBe TCOMpensation Returns whether the probe is temperature compensated PROBe AXES Returns the probe number of axes PROBe CALDate Returns the calibration date Command Parameter s Description UNIT Returns the field unit setting UNIT TESLa GAUSs Configures the field unit set ting Tesla is the default UNIT CGSDISABLE Returns whether a user can change their field measure ment units ...

Page 83: ...tage output SOURce FIELd OPLoop VOLTage Returns the open loop voltage output setting SOURce FIELd OPLoop VOLTage voltages Sets the open loop voltage out put setting SOURce FIELd CLLoop SETPoint Returns the final field setpoint SOURce FIELd CLLoop SETPoint setpoint in field units Sets the final setpoint SOURce FIELd CLLoop GAIN Returns the P value of the PI control SOURce FIELd CLLoop GAIN P value ...

Page 84: ...76 cHAPTER 4 Computer Interface Operation F71 F41 Teslameter ...

Page 85: ...e Please see https www lakeshore com products categories overview magnetic products hall probes fp series hall probes 5 3 Accessories Accessories are devices that perform a secondary duty as an aid or refinement to the primary unit Contact Lake Shore for information on accessories Model Description F41 F41 teslameter F71 F71 teslameter TABLE 5 1 Model description Model Description RMX FULL Full ra...

Page 86: ...etails FIGURE 5 1 Full rack mounting Standard 19 in 483 mm rack width Item Description Qty 1 Full rack mount tray 1 2 Screw M4 5 mm FHM Phillips 4 3 Washer 1 6 to 1 8 mm THK 2 If a non XIP full rack instrument will be installed above temporarily install supplied spacers to allow screen to tilt freely Expose threads by removing the feet using a flat blade screwdriver 2U 1 in 25 mm clearance A third...

Page 87: ...pplied spacers to allow screen to tilt freely A third party shelf may be used though more space may be required above instrument Additional screws are included for use with other Lake Shore or third party instruments Expose threads by removing the feet using a flat blade screwdriver Item Description Qty 1 Rack mount panel 1 2 Rack mount ear 1 3 Half rack mount tray 1 4 Screw M4 5 mm FHM Phillips 2...

Page 88: ...80 cHAPTER 5 Probes and Accessories F71 F41 Teslameter ...

Page 89: ...t the USB driver is installed properly and that the device is functioning In Microsoft Windows the device status can be checked using Device Manager by right clicking Lake Shore Instrument under Ports COM LPT or Other Devices and then clicking Properties Refer to Chapter 4 for details on installing the USB driver 3 Check that the correct com port is being used In Microsoft Windows the com port num...

Page 90: ...t breaks the conducting path Temperature compensation rail Thecurrentdoesnothaveapaththroughthetemperaturesensor Theprobe may have a mechanical fault that breaks the conducting path Measurement messages No probe There is no probe attached or the attached probe is damaged Invalid probe The detected probe does not contain calibration information This is more often the case when using a Hall sensor I...

Page 91: ...n Description 1 Ground 7 Ground 2 Power 8 Power 3 Input 2 low 9 Relay 2 low 4 Input 2 high 10 Relay 2 high 5 Input 1 low 11 Relay 1 low 6 Input 1 high 12 Relay 1 high TABLE 6 2 Digital I O pinouts FIGURE 6 2 Wireless network antenna connector Pin Description Center conductor Antenna input Outer shield Antenna return chassis ground TABLE 6 3 WLAN settings ...

Page 92: ...er from switch not used 5 EPWR Power from switch not used 6 RXD Receive data 7 EPWR Power from switch not used 8 EPWR Power from switch not used TABLE 6 4 Ethernet pin and connector details FIGURE 6 4 USB pin and connector Pin Symbol Description 1 VCC 5 VDC 2 D Data 3 D Data 4 GND Ground TABLE 6 5 USB pin and connector details EPWR EPWR RXD EPWR EPWR RXD TXD TXD 2 1 3 4 ...

Page 93: ...ive B7 Dn2 Non SuperSpeed differential pair position 2 negative A7 Dn1 Non SuperSpeed differential pair position 1 negative B6 Dp2 Non SuperSpeed differential pair position 2 positive A8 SBU1 Sideband use SBU B5 CC2 Configuration channel A9 VBUS Bus power B4 VBUS Bus power A10 SSRXn2 SuperSpeeddifferentialpair 4 RX negative B3 SSTXn2 SuperSpeeddifferentialpair 3 TX negative A11 SSRXp2 SuperSpeeddi...

Page 94: ... X4 13 Shield 22 Temperature voltage 5 Y1 14 Adapter Detect 23 EEPROM Power 6 Y3 15 Connector Detect2 24 Temperature voltage 7 Y2 16 Ground 25 Connector Detect 8 Y4 17 EEPROM Data 26 Ground 9 Z1 18 Temperature current TABLE 6 7 Probe input connector details FIGURE 6 8 BNC connector Pin Description Center conductor Output high Outer shield Output low instrumentation ground TABLE 6 8 BNC connector ...

Page 95: ... to store boot loader firmware The memory is programmed at Lake Shore 6 The Cypress FM24V10 is a 128 KB I2C F RAM It is used on the field control option card to store the serial number and calibration information The memory is pro grammed at Lake Shore 7 The 24LC1025T is a 1 Mb I2C EEPROM It is used to store probe information serial number and calibration data In the majority of cases this informa...

Page 96: ... any shipping carton s in which equipment is originally received in the event that any equipment needs to be returned If original packaging is not available a minimum of 76 2 mm 3 in of shock absorbent packing material should be placed snugly on all sides of the instrument in a sturdy corrugated cardboard box Please use reasonable care when removing the teslameter from its protective packaging and...

Page 97: ...in 30 days after the RMA is issued The RMA will be cancelled if we do not receive the equipment after 60 days 6 9 4 Shipping Charges All shipments to Lake Shore are to be made prepaid by the customer Equipment serviced under warranty will be returned prepaid by Lake Shore Equipment serviced out of warranty will be returned FOB Lake Shore 6 9 5 Restocking Fee Lake Shore reserves the right to charge...

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