5
1.8. According to the operating conditions, the stress
indicator belongs to the type of climatic version of UHL 3.1
according to GOST 15150-69 and can work steadily when:
- ambient temperature from minus 20ºC to plus 70ºC,
- relative humidity up to 98 % at +25ºC,
- atmospheric pressure from 84 kPa to 106.7 kPa.
2. TECHNICAL SPECIFICATIONS
2.1. The range of measurement of the field strength of
the residual magnetization of the metal, mT:
- from 0 to 20.00
2.2. Measuring range of mechanical stress of metal of
steel products, metal structures, MPa:
- from 0 to σ
B
where σ
B
is the ultimate strength of the metal.
2.3. The limit of the allowed basic error in measuring
the mechanical stress of the metal of a steel product or metal
structure is determined by the formula:
0.5 + 0.05 σ
i
(2.1)
where σ
i
is the stress indicator readout in MPa.
2.4. The metal stress indicator is powered by a PP3
element with nominal electric voltage of 9V.
2.5. Electric current consumed from a freshly charged
PP3 element, mA:
- when working without the display backlight
- 7 ± 0.5
- when working with the display backlight
- 16 ± 0.5
2.6. Operating time of stress indicator when powered
from freshly charged element PP3, in hours, at least:
- 20
6
2.7. Time to set the metal stress indicator's operating
mode, s, not more than:
- 10
2.8. Time of one measurement, s, not more than:
- 5
2.9. Time of continuous operation of the stress
indicator, h, not less than:
- 16
2.10. Battery charge time, minutes, not more:
- 80
2.11. The stress indicator has a memory card with a
capacity of more than 60000 measurements.
2.12. The stress indicator has a standard output for
transmitting measured information to a personal computer via
a mini-USB connector.
2.13. Overall dimensions, mm, not more than:
- Electronic unit (length × width × thickness)
- 136×72×28
- Sensor (diameter × length)
- 20×15
- Sensor cable length
-950±50
- Magnetizing device (diameter × length)
- 20×190
2.14. Weight, g:
- Electronic unit with battery
- 200
- Sensor with cable
- 40
- Magnetizing device
- 300
2.15. Average recovery time, h:
- 5
2.16. Full average service life, years:
- 10
2.17. Established service life, years:
- 2
