#### Navigation

Skip menu## Milliteslameters (magnitometers) portable modular **TPM-250**.

**Purpose:**

- Has a pattern approval certificate № 70377-18.
- It is a device of non-directional measurement, while measuring and indicating the module and the three orthogonal components of the vector of magnetic induction and magnetic field strength; measures amplitude, rms and average rectified values of sinusoidal magnetic fields with frequency from 0.5 to 400 Hz; measures the maximum magnitude of the module of vector of magnetic induction and magnetic field strength (along the major axis of the ellipse or ellipsoid polarization of the magnetic field in two or more phase electrical installations).
- The device is designed to measure the parameters of magnetic fields created by magnetic systems, electrical devices of various functional puprose and magnetized structural elements, power lines, power supply systems of transport and other sources, as well as measurements in shielded rooms.
- Indicates the results of measurements in units of magnetic induction (nT, µT, mT) or magnetic field strength (A/cm, A/m, kA/m).
- Convenient for solving problems of special assessment of working conditions, production control and instrumental assessment sanitary and epidemiological well being of the population.
- Maximum value of the module of alternating magnetic field is obtained through measurement of components B
_{x}, B_{y}, В_{z}, using discrete Fourier transform of input signals (also frequency of alternating magnetic field is found) and calculation of extremum of function**B(t) = [B**_{x}(t)^{2}+ B_{y}(t)^{2}+ В_{z}(t)^{2}]^{½} - For remote control and data exchange between device and PC (by USB interface) special software is developed.
- On request a dynamic library (with usage examples) for measurement process automation is supplied.

**Technical data of TPM-250:**

- Designed to measure parameters of constant and alternating magnetic field with two measuring zonds (type 1 and type 2).
- Frequency of measured alternating field: from 0,5 to 200 Hz with measuring zond type 1 and from 1 to 400 Hz with measuring zond type 2 with indication of main harmonic frequency (with the largest amplitude of magnetic field).
- Limits of measurements and calculations of parameters of constant and alternating magnetic fields with measuring zond type 1:
- components of vector of magnetic induction
**B**_{x}, B_{y}from 0,001 to

4 mTl, В_{z}from 0,001 to 8 mTl; - components of magnetic field strength
**H**_{x}, H_{y}from 0,8 to

3200 A/m, H_{z}from 0,8 to 6400 A/m; - module of vector of magnetic induction (maximum value of the module when measuring alternating magnetic fields)
**B from 0,002 to 10 mTl;** - module of magnetic field strength (maximum value of magnetic field strength when measuring alternating magnetic fields)
**H from 1,6 to 8000 A/m.**

- components of vector of magnetic induction
- Limits of measurements and calculations of parameters of constant magnetic fields with measuring zond type 2:
- components of vector of magnetic induction
**B**_{x}, B_{y}, В_{z}from 0,01 to 150 mTl; - components of magnetic field strength
**H**_{x}, H_{y}, H_{z}from 8 A/m to 120 kA/m; - module of vector of magnetic induction
**B from 0,02 to 260 mTl**; - module of magnetic field strength
**H from 16 A/m to**.

208 kA/m

- components of vector of magnetic induction
- Limits of measurements and calculations of parameters of alternating magnetic fields with measuring zond type 2:
- components of vector of magnetic induction
**B**_{x}, B_{y}, В_{z}from 0,01 to 150 mTl; - components of magnetic field strength
**H**_{x}, H_{y}, H_{z}from 8 A/m to 120 kA/m; - module of vector of magnetic induction
**B from 0,02 to 260 mTl**; - module of magnetic field strength
**H from 16 A/m to**.

208 kA/m

- components of vector of magnetic induction
- Maximum relative error of measurements of the magnetic induction B (magnetic field strength H) δ
_{0}, % :- for measuring zond type 1, А
_{l}= 10 mTl (8000 A/m)**δ**- measured value;_{0}= ± [3,0 + 0,03•(A_{l}/A_{m}- 1)], A_{m} - for measuring zond type 2, A
_{l}= 260 mTl (208000 A/m or 2080 A/cm)**δ**- measured value._{0}= ± [2,0 + 0,01•(A_{l}/A_{m}- 1)], A_{m}

- for measuring zond type 1, А
- Limits of frequency of alternating magnetic fields, measuring zond type 1:
- in "Alternating field" mode
**3 – 200 Hz**; - in "Low frequency alternating field" mode
**0,5 – 20 Hz**.

- in "Alternating field" mode
- Limits of frequency of alternating magnetic fields, measuring zond type 2:
- in "Alternating field" mode
**6 – 400 Hz**; - in "Low frequency alternating field" mode
**1 – 50 Hz**.

- in "Alternating field" mode
- Special mode of measring alternating field with frequency
**(50 ± 1) Hz**is implemented in TPM-250 for both measuring zonds. - Maximum absolute error of alternating field frequency measurements f, Hz:
**Δf = ± (0,001•f + 0,1 Hz)**

- TPM-250 has built in accumulator with nominal voltage of 3,7V.
- Complies with the requirements of the technical regulations of the Customs Union ТР ТС 004/2011 and ТР ТС 020/2011.

- Contents of a package:
- user manual;
- calibration procedure methodics;
- measurement zonds (one set);
- magnet shielding (for zond);
- USB charger;
- CD with a software;
- case.

**Documentation (in russian unless otherwise specified):**

- TPM-250 flyer
- TPM-250 flyer for magnetic particle control
- Description of measuring instruments pattern of TPM-250: scan copy; text
- Pattern approval certificate of measuring instruments
**"milliteslameters portable modular TPM-250"** - Calibration procedure methodics of TPM-250: scanned copy of an approved document ; text
- User manual (in English)
- Declaration of Conformity with the technical regulations of the vehicle teslameters portable modular TPM-250