F71/F41 Specifications

Input

Input overview

  F41 single-axis F71 multi-axis
Number of measurement inputs 1 3
Number of physical connectors 1
Connector type 26-pin mini D-sub

Electronic resolution

Measured noise across a short, useful for determining teslameter performance isolated from external sources of noise and offsets

  Typical RMS noise
(1 s averaged shorted input readings)
Equivalent field values
(using typical 2Dex sensitivity of 104 mV/T at 2 mA drive current)
35 T (350 kG) range 40 nV 0.4 µT (4 mG)
3.5 T (35 kG) range 40 nV 0.4 µT (4 mG)
350 mT (3.5 kG) range 5 nV 0.05 µT (500 µG)
35 mT (350 G) range 2 nV 0.02 µT (500 µG)

Electronic accuracy

Calibrated accuracy of the teslameter without a probe connected; environment ±5 °C of instrument calibration temperature

35 T (350 kG) range ±0.15% of reading, ±0.00001% of range
3.5 T (35 kG) range ±0.05% of reading, ±0.00001% of range
350 mT (3.5 kG) range ±0.05% of reading, ±0.0001% of range
35 mT (350 G) range ±0.06% of reading, ±0.001% of range

Software features

Available measurement readings

  Frequency range DC component AC RMS AC peak-values Frequency
DC DC only Yes
AC DC to 60 Hz Yes Yes Yes Yes
High frequency 20 Hz to 10 kHz* Yes Yes Yes
*May be limited by probe

Maximum hold

  DC measurement mode AC measurement mode High frequency mode
F41 single-axis Field reading RMS reading RMS reading
F71 multi-axis Magnitude readings RMS reading of magnitude RMS reading of magnitude

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 value

  DC measurement mode AC measurement mode High frequency mode
F41 single-axis Field reading RMS reading RMS reading
F71 multi-axis Magnitude reading RMS reading of magnitude RMS reading of magnitude

Relative functions   Baseline (directly enter relative offset value)
Tare (set offset to current field value)
Reset (set offset to zero)

DC field measurement performance

Measurement resolution

Typical RMS measurement noise that would be present when measuring a fixed field (teslameter and probe both contribute to measured noise, a realistic representation of measurement performance)

  Averaging window
  10 ms 200 ms
(default)
1 s 10 s
35 T (350 kG) range 300 µT
(3000 mG)
70 µT
(700 mG)
30 µT
(300 mG)
10 µT
(100 mG)
3.5 T (35 kG) range 6 µT
(60 mG)
1.2 µT
(12 mG)
0.6 µT
(6 mG)
0.17 µT
(1.7 mG)
350 mT (3.5 kG) range 0.7 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) range 0.5 µT
(5 mG)
0.12 µT
(1.2 mG)
0.05 µT
(0.5 mG)
0.02 µT
(0.2 mG)

Measurement accuracy

Accuracy of the reported field measurement when a standard probe is used to measure a magnetic field at instrument calibration temperature ±5 °C. Dictated by uncertainty values for Hall probe calibration stations. Does not include TruZero residual offset for the teslameter that will also be present, but may be significantly smaller than the probe measurement accuracy.

  Single-axis 3-axis magnitude*
35 T (350 kG) range* ±1% of rdg ±2% of rdg
3.5 T (35 kG) range* ±0.15% of rdg ±0.25% of rdg
350 mT (3.5 kG) range ±0.15% of rdg ±0.25% of rdg
35 mT (350 G) range ±0.15% of rdg ±0.25% of rdg

*Each probe calibrated to 2.5 T minimum. Sensors characterized to 18 T. Calibration data for each probe extrapolated to 35 T. Accuracy specifications are expected to hold for fields exceeding 2.5 T, but cannot be guaranteed.


TruZero™ residual offet

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

  Within ±5 °C of probe calibration temperature Typical temperature coefficient beyond ±5 °C of probe calibration temperature
Single-axis ±3.5 µT ±0.3 µT/°C
3-axis magnitude ±7 µT ±0.6 µT/°C

AC field measurement performance

AC mode

Best for low frequency AC fields where higher accuracy or the inclusion of DC offset is required.

AC mode cut-off frequency 625 Hz (-3 dB)
60 Hz (-0.2%)

Teslameter frequency response: AC mode

  
Teslameter frequency response: AC mode

Measurement accuracy

Accuracy of the reported field measurement when a standard probe is used to measure a magnetic field at instrument calibration temperature ±5 °C. Dictated by uncertainty values for Hall probe calibration stations.

 Single-axis3-axis magnitude*
AC mode RMS accuracy±0.25% of reading ±0.05% of range±0.5% of reading ±0.1% of range
AC mode peak to peak accuracy±0.55% of reading ±0.2% of rangeReading not present on instrument

High frequency mode

High frequency mode passband 1.7 Hz to 80 kHz (-3 dB point)
20 Hz to 7 kHz (0.2 %)
Teslameter frequency response: HF mode  
Teslameter frequency response: HF mode

Measurement accuracy

Accuracy of the reported field measurement when a standard probe is used to measure a magnetic field at instrument calibration temperature ±5 °C. Dictated by uncertainty values for Hall probe calibration stations.

 Single-axis3-axis magnitude*
HF mode RMS accuracy±0.5% of reading ±0.5% of range±1% of reading ±1% of range
HF mode peak to peak accuracy±2% of reading ±2% of rangeReading not present on instrument

Analog output

Analog output raw signal accuracy  ±1% of amplified AC Hall voltage value ±50 mV
Raw analog output voltage range ±15 V rails, ±12.5 V maximum during overload

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

Front panel

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

Interface

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
    

General

Operating conditions 23 °C ±5 °C at rated accuracy, 10 °C to 70 °C at reduced accuracy
Warm-up time 0 min at rated operating conditions
Instrument maximum field exposure 10 mT (100 G) DC, 1 mT (10 G) RMS; exposure to any significant amount of field has the potential to cause reading offsets
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
Wireless approvals FCC: TFB-TIWI1-01, IC: 5969A-TIWI101, Giteki: G209-J00157