Ammeter M4220, M4220 microammeter (M 4220, M-4220)
Ammeter M4220, M4220 is designed for micro-ammeter measuring the current in the DC and AC.
Dimensions - 80h80h47mm.
Accuracy Class - 1.5.
Technical characteristics of the devices ammeters M4220, M4220 microammeter:
Name and type of instrument, accuracy class and length scales are given in Table 1.
Allowable main error of the instrument ammeter M4220, M4220 microammeter - ± 1,5%.
Failure to return the arrows to the zero point - 0.9 mm.
The voltage drop across the device ammeter M4220, M4220 microammeter - 400mV.
Enable the device - directly.
The numerical scale mark device ammeter M4220, M4220 microammeter --5V,-2V, 0V, 2V, 4V, 6V, 8V, 10V.
Current corresponding to this point - 18mkA, 28.9 mA, 39mkA, 52mkA, 69mkA, 89.75 mA, 116.25 mA, 150mkA.
Variation of reading ammeter M4220, M4220 microammeter does not exceed the permissible basic error.
The devices are designed for use in vertical or horizontal position.
Settling time of the mobile device ammeter M4220, M4220 microammeter - 4c.
Change the readings due to ambient temperature deviation from the normal to any (within operating temperature) for every 10K, does not exceed the values listed in Table. 3.
Permitted additional error of the instrument ammeter M4220, M4220 microammeter induced effect of a homogeneous constant magnetic field induction 0.5 mT is ± 0,5%, when exposed to an alternating magnetic field frequency of 500 Hz (for milliammeter and voltmeters) and 100Hz (for microammeter) - is ± 2.5%.
Overall dimensions and weight of devices are shown in Table. 2.
Time to failure - at least 24 000 hours.
Average life instrument ammeter M4220, M4220 microammeter - at least 6 years.