F71/F41 Specifications

Input overview

 F41 single-axisF71 multi-axis
Number of measurement inputs13
Number of physical connectors1
Connector type26-pin mini D-sub
Supported probes/sensorsFP-2X-250 axial and transverse single-axis probes, 2X-250-XX-1CBL-X single-axis plug-and-play sensorsFP-2X-250 axial and transverse single-axis probes, FP-2X-250 3-axis probes, 2X-250-XX-1CBL-X single-axis plug-and-play sensors, and XX-3CBL-X 3-axis plug-and-play sensors
Probes/sensors NOT supported400 Series gaussmeter probes, and 2Dex, InAs, and GaAs loose sensors

Ranges

 Autorange35 mT (350 G)350 mT (3.5 kG)3.5 T (35 kG)35 T (350 kG)
StandardYes2 mA drive2 mA drive2 mA drive0.2 mA drive
CryogenicYesNo0.2 mA drive0.2 mA drive0.2 mA drive

Software features

Available measurement readings

 Frequency rangeProbe/sensorDC componentAC RMSAC peak valuesFrequency
DC modeDC onlySingle-axisYes
3-axisYes (X, Y, Z, magnitude)
AC modeDC to 550 Hz*Single-axisYesYesYesYes
3-axisYes (X, Y, Z, magnitude)Yes (X, Y, Z, magnitude)Yes (X, Y, Z, magnitude)Yes (largest amplitude signal)
High frequency mode1.7 Hz to 75 kHz*Single-axisYesYesYes
3-axisYes (X, Y, Z, magnitude)Yes (X, Y, Z, magnitude)Yes (largest amplitude signal)

*Frequency range defined as -3 dB point. See frequency specification for detailed information of instrument roll-off.

Maximum hold

Values stored with the maximum hold feature

 Single-axis probe/sensor3-axis probe/sensor
DC modeField readingVector magnitude reading
AC modeRMS readingRMS of vector magnitude reading
High frequency modeRMS readingRMS of vector magnitude reading

Maximum value Closest value to +∞
Minimum value Closest value to -∞
Max hold reset Reset max and min values at the same time or separately

Relative values

Values referenced by the relative value feature

 Single-axis probe/sensor3-axis probe/sensor
DC modeField readingVector magnitude reading
AC modeRMS readingRMS of vector magnitude reading
High frequency modeRMS readingRMS of vector magnitude reading

Performance specifications

All specifications have a minimum confidence interval of 95% with a test uncertainty ratio of 4:1.

Specifications are defined as 1 year after calibration with an instrument environment within ±5 °C of calibration.

Temperature coefficient of ±0.002% of rdg/°C beyond ±5 °C of instrument calibration temperature applies to all accuracy specifications.

Instruments are typically calibrated at an ambient temperature of 22 °C. The exact temperature can be found through the front panel of the instrument.

DC field measurement performance

System measurement noise

Typical RMS measurement noise at zero field (teslameter and probe both contribute to measured noise, a realistic representation of measurement performance).

 Averaging window
 10 ms200 ms
(default)
1 s10 s
35 T (350 kG) range300 µT (3 G)70 µT (700 mG)30 µT (300 mG)10 µT (100 mG)
3.5 T (35 kG) range6 µT (60 mG)1.2 µT (12 mG)0.6 µT (6 mG)0.17 µT (1.7 mG)
350 mT (3.5 kG) range0.7 µT (7 mG)0.16 µT (1.6 mG)0.07 µT (0.7 mG)0.03 µT (0.3 mG)
35 mT (350 G) range0.5 µT (5 mG)0.12 µT (1.2 mG)0.05 µT (0.5 mG)0.02 µT (0.2 mG)
35 T (350 kG) cryogenic range300 µT (3 G)70 µT (700 mG)0.05 µT (0.5 mG)0.02 µT (0.2 mG)
3.5 T (35 kG) cryogenic range38 µT
(380 mG)
8.5 µT
(85 mG)
3.8 µT
(38 mG)
1.2 µT
(12 mG)
350 mT (3.5 kG) cryogenic range4.4 µT
(44 mG)
1 µT
(10 mG)
0.44 µT
(4.4 mG)
0.14 µT
(1.4 mG)

System absolute measurement accuracy*

Accuracy of the reported field measurement.

 Individual axes (single-axis, X, Y, Z)3-axis magnitude
35 T (350 kG) range±0.2% of rdg±0.40% of rdg
3.5 T (35 kG) range±0.15% of rdg±0.30% of rdg
350 mT (3.5 kG) range±0.15% of rdg±0.30% of rdg
35 mT (350 G) range±0.15% of rdg±0.30% of rdg
35 T (350 kG) cryogenic range±0.2% of rdg±0.40% of rdg
3.5 T (35 kG) cryogenic range±0.2% of rdg±0.40% of rdg
350 mT (3.5 kG) cryogenic range±0.2% of rdg±0.40% of rdg

*Each probe calibrated to 2.5 T minimum. Sensors characterized to 18 T. Calibration data for each probe extrapolated to 35 T.

TruZero™ residual offset

Remaining detectable measurement offset (observed at zero field and expected to be present at higher fields as well)

 Individual axes (single-axis, X, Y, Z)3-axis magnitude
Offset within ±5 °C of probe calibration temperature±3.5 µT (±35 mG)±7 µT (±70 mG)
Typical temperature coefficient beyond ±5 °C of probe calibration temperature±0.3 µT/°C (±3 mG/°C)±0.6 µT/°C (±6 mG/°C)

AC field measurement performance

AC mode bandwidth

AC mode cut-off frequency 550 Hz (-3 dB)
60 Hz (-0.2%)

Teslameter frequency response: AC mode

Teslameter frequency response: AC mode

AC mode accuracy

Accuracy of the reported field measurement at frequencies within the flat response portion of the instrument frequency response curve.

 Individual axes (single-axis, X, Y, Z)3-axis magnitude
RMS±0.25% of reading ±0.05% of range±0.5% of reading ±0.1% of range
Peak to peak±0.55% of reading ±0.2% of rangeReading not present on instrument

High frequency mode measurement performance

High frequency mode bandwidth

High frequency mode passband 1.7 Hz to 75 kHz (-3 dB point)
20 Hz to 7 kHz (-0.2%)

Teslameter frequency response: high frequency mode

Teslameter frequency response: HF mode

High frequency mode accuracy

Accuracy of the reported field measurement at frequencies within the flat response portion of the instrument frequency response curve.

 Individual axes (single-axis, X, Y, Z)3-axis magnitude
RMS±0.5% of reading ±0.5% of range±1% of reading ±1% of range
Peak to peak±2% of reading ±2% of rangeReading not present on instrument

Frequency detection

Frequency detection counter accuracy ±1% of frequency ±1 Hz for a periodic wave faster than 1 Hz and RMS value greater than 1% of range

Temperature compensation

Temperature compensation of field

Sensor/probe temperature-dependent field measurement error — we have characterized the temperature dependence of sensitivity for our Hall sensors and apply a correction factor to compensate. The residual error listed below reflects the variability that exists from sensor to sensor.

 Temperature range
 -273 °C to 0 °C
0 °C to 35 °C35 °C to 60 °C60 °C to 90 °C
Compensation: on±1.5%±0.02%±0.1%±0.5%
Compensation: offSee temperature coefficient of sensitivity data for loose 2Dex sensors

Temperature compensation sources Embedded probe sensor, manual entry (front panel), manual entry (external communication), none (compensation off)
   
Temperature compensation range Probe dependent (see probe specifications for details)

Probe/sensor temperature measurement

Accuracy of temperature measurements when the teslameter is reading the embedded temperature sensor inside the Hall probe/sensor. Note that the temperature sensor is reading the temperature of the sensing element, which may be slightly warmer than ambient temperature.

Accuracy ±1 °C
   
Temperature coefficient ±0.03 °C/degree1

1 This means that for every degree outside the 5 °C calibration temperature margin, the standard 1 °C accuracy value will increase by 0.03 °C.

Analog output

 ModeFunctionChannels/readings available (non-concurrent)
Raw modesDCDiagnostic onlyX, Y, Z
ACDiagnostic onlyX, Y, Z
High frequencyAnalog representation of waveform (pulse, etc.)X, Y, Z
Corrected modesDCAnalog representation of field valuesX, Y, Z, vector magnitude
ACAnalog representation of RMS field valuesX, Y, Z, vector magnitude
High frequencyAnalog representation of RMS field valuesX, Y, Z, vector magnitude

Limits ±12.5 V possible during overload
   
Raw signal source Analog amplified Hall voltage
Raw signal accuracy ±1% of amplified Hall voltage value ±50 mV
   
Corrected output source DAC generated voltage based on field reading
Corrected output range ±3.5 V = full range
Corrected output accuracy ±1% of front panel measurement
Corrected output update rate 2 kHz

 

Field control option card

 

Control types Closed loop (PI) or open loop
Features Setpoint, setpoint ramping
Full scale voltage output ±10 V
Control resolution <0.1 µT (<1 mG)
Protections Configurable maximum slew rate, configurable voltage limit
Open loop voltage accuracy ±1% of full scale

Digital I/O

Inputs

Number of independent inputs 2
Input isolation Optical
Maximum low-level input voltage 1 V
Minimum high-level input voltage 4 V
Safe input voltage rage -5 V to 35 V

Outputs

Number of relays 2
Relay type Solid state
Digital output relay maximum current 2 A
Digital output relay maximum voltage 35 V

Environment

Instrument operating environment 23 °C ±5 °C and <70% relative humidity non-condensing at rated accuracy; -20 °C to 70 °C and <90% relative humidity non-condensing at reduced accuracy
   
Instrument max field exposure 10 mT (100 G) DC, 1 mT (10 G) RMS

Communication

Protocols

Each protocol is supported on all interfaces.

 Function
SCPI commandsNative communication method with instrument
Python driverSimplifies connection and operation with Python
LabVIEW™ driverAdd teslameter to LabVIEW™-controlled systems
IVI.NET driverEasier integration with test and measure instruments

USB host

 Type USB 3.0, mass storage class (MSC) device
 Function Firmware updates, flash drive support
 Location Rear panel
 Connector C-type USB connector

USB device

 Type USB 2.0
 Function Emulates a standard RS-232 serial port
 Protocol Standard commands for programmable instruments (SCPI)
 Baud rate 115,200
 Connector B-type USB connector
 Software support LabVIEW (F71 or F41) and IVI.NET drivers

Ethernet

 Function TCP/IP command and control, mobile app (in development)
 App layer protocol Standard commands for programmable instruments (SCPI)
 Connector RJ-45
 Speed 1 Gb/s
 Software support LabVIEW (F71 or F41) and IVI.NET drivers

Wi-Fi

 Type 802.11 b/g/n
 Function TCP/IP command and control, mobile app (in development)
 App layer protocol Standard commands for programmable instruments (SCPI)
 Antenna External, coaxial
 Software support LabVIEW (F71 or F41) and IVI.NET drivers

Display

Display update rate 5 rdg/s
   
Display 5 in capacitive touch, color 800 × 480 with LED backlight

General

Operating conditions 23 °C ±5 °C, <70% relative humidity non-condensing at rated accuracy; -20 °C to 70 °C, <90% relative humidity non-condensing at reduced accuracy
Power requirement 100 V to 240 V (universal input), 50 to 60 Hz, 30 VA
Size 217 mm W × 87 mm H × 317 mm D (8.5 in × 3.4 in × 14.5 in), half rack
Weight 3.2 kg (7 lb)
Approval CE mark
FCC ID (wireless radio) TFB-TIWI1-01
Warm-up time Ready on boot
Power consumption 35 W maximum