THM1176/TFM1186 Use
r’s Manual
v 2.0 r 1.0
– 02/20
Copyright © 2020 Metrolab Technology SA
www.metrolab.com
43
REFERENCE
6-
Technical Specifications
6-1 MEASUREMENT
Ranges:
- THM1176-MF:
100 mT, 300 mT, 1 T, 3 T
- THM1176-HF:
100 mT, 500 mT, 3T, 20T (calibrated to 14.1 T)
- THM1176-HFC:
100 mT, 500 mT, 3T, 20T (calibrated to 1.5 T)
- THM1176-LF:
8.0 mT
- TFM1186:
100 µT
Notes: Ranging may be performed automatically or manually.
Data output:
- B
x
, B
y
, B
z
(ASCII or binary, single point or array, calibrated or not)
- Temperature (uncalibrated)
- Time stamp (167 ns resolution)
Units:
- THM1176-MF/HF/HFC:
T, mT, µT, G, kG, MHz p (proton NMR frequency)
- THM1176-LF:
T, mT, µT, G, mG
- TFM1186:
T, mT, µT, nT, G, mG
Sample rate:
- Immediate trigger (default):
Approx. 6.8 kSa/s (free-running, until internal buffer is full)
- Timed trigger:
Into internal buffer: 0.36 Sa/s to 5.3 kSa/s (jitter ~ 0.2 µs std. dev.)
During USB readout: 0.36 Sa/s to 2.3 kSa/s (jitter ~ 1.2 µs std. dev.)
- Bus trigger (via USB):
Up to approx. 400 Hz (until internal buffer is full)
Notes: 1 sample = (B
x
, B
y
, B
z
); Internal buffer size = 4096 samples
Bandwidth:
DC to 1 kHz
Resolution:
- THM1176-MF:
0.1 mT
- THM1176-HF/HFC:
0.3 mT
- THM1176-LF:
2 µT
- TFM1186:
4 nT
Notes: Averaging of N measurements improves the resolution by
approximately √N.
Accuracy:
- THM1176-MF/HF/HFC:
±1 % of reading or specified resolution, whichever is greater
- THM1176-LF:
±20 µT
- TFM1186:
±0.5% of reading and ±100 nT
Notes: The accuracy is given for arbitrary field orientation; typically it is
x10 better along the primary axes.