Ohmmeter M371 (M 371, M-371)
Designed to measure resistances DC direct-reading on the scale.
Measurement Range: 10/100 ohm ohm 100/1000/10000 - 500V, in the border 100kOm/10MOm - 2000V.
Accuracy class 1.5
Ohmmeter M371 portable designed to measure resistances DC direct-reading on the scale.
Ohmmeter M371 is designed to operate at ambient temperatures from minus 30 to plus 40 ° C and relative humidity up to 90% at 30 ° C.
Ohmmeter M371 devices are manufactured in tropical version for operation in ambient temperatures from 10 ° to 45 ° C and a relative humidity of 98% at 35 ° C. The devices are designed for indoor operation in the absence of sudden changes in ambient temperature, solar radiation, rain and dust. In this case, the plant designation appliance must be M37I 04.2.
Class of instrument accuracy Ohmmeter M371 1.5.
Maximum permissible error of the instrument shown in the measurement range is ± 1,5% of the length of the scale. Limit of permissible variations readings equal to the limit of the basic reduced error. The residual deviation of the index from zero at the level of the mechanical tangential approach pointer to that point from the most remote of the scale does not exceed 0.6 mm.
The limit of additional error device Ohmmeter M371 caused by changes in ambient temperature of (20 ± 5) ° C to any temperature ranging from minus 30 to plus 40 ° C does not exceed ± 0,75% of scale length for every 10 ° C change temperature. The limit of additional instrument error caused by the change of position from the normal position in any direction by 30 °, equal to the limit of the basic reduced error.
The limit of additional error device Ohmmeter M371 caused by the influence of an external constant uniform magnetic field with a magnetic flux density of 0.5 mT at the most unfavorable direction of the magnetic field is equal to ± 1,0% of the length of the scale.
Response time Ohmmeter M371 device does not exceed 4. Continuous operation time of 1 min. with inoperable intervals of 4 min.
The insulation between the casing and insulated from the housing all the DC electric circuits of the device can withstand Ohmmeter M371 for 1 min. test voltage of substantially sinusoidal waveform having a frequency of 50 Hz.
RMS voltage to within 10/100 ohm ohm 100/1000/10000 - 500V, in the border 100kOm/10MOm - 2000V. The insulation resistance between the case and isolated dc circuits not less than:
1/40 megohms under normal conditions of use;
2/5 megohms at 40 ° C and a relative humidity of 80%;
3/2 megohms at ambient temperature (20 ± 5) ° C and relative humidity of 90%. Overall dimensions Ohmmeter M371 max 125x110x56 mm. Unit weight is not more than 0.5 kg. The length scale of at least 82 mm.
Also, this device may have different names: megger M371, Megger M371, M371 megometr, megger M371, M371 megametr, Megaohmmeter M371, M371 ohmmeter.