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The MIC-3 meter is a small, portable instrument for measuring the insulation resistance of electrical installations, cables, transformers, motors and other devices.
It can measure the protective circuits and junctions' continuity with the test current I>200mA.
The meter enables the low-voltage measurements of low resistances with beeper signalization. The MIC-3 also measures alternate and directcurrent voltage.
- the measurement voltage is selected 250 V, 500 V lub 1000 V,
- on-line insulation resistance measurement,
- automatic discharge of tested object’s capacitance after measurement of insulation resistance,
- acoustic determination of 5 seconds time intervals that facilitates to take time characteristics during insulation resistance measurement,
- indicator of the actual test voltage value during a measurement,
- protection against live objects.
- Measurement of continuity of equipotential bondings and protective conductors:
- current measurement ≥ 200mA with resolution 0,01Ω,
- autozeroing test leads. - Low voltage resistance measurement in range 0...400Ω:
- current measurement 10mA with resolution 0,1Ω,
- quick acoustic signalling （beeper） for circuit resistance below 10Ω. - AC/DC voltage measurement in range 0...600V:
- automatic detection AC/DC voltage. - Autoranging.
- „AUTO-OFF” function.
- Meter meets the requirements of the standard EN 61557.
- type of insulation: double, according to EN 61010-1 and IEC 61557
- measurement category: CAT III 300V acc. to EN 61010-1
- protection class acc. to EN 60529: IP40
Other technical data:
- power supply: batteries LR6 （AA） （2 pcs.） or accumulators （AA） （2 pcs.）
- auto power OFF: 120 seconds
- Frequency of measurements for RISO function: about 3 measurements/second
- number of RISO measurements （with Panasonic POWERMAX 3 batteries）: min. 1500
- number of RCONT measurements （with Panasonic POWERMAX 3 batteries）: min. 5000
- dimensions: 230 x 67 x 35 mm
- weight: approx. 300 g
- display: LCD, 4 digits 14mm high
Rated operational conditions:
- operating temperature: 0...+40°C
- storage temperature: -20...+60°C
- reference temperature: +23 ± 2°C
Insulation resistance measurement
maximum converter’s current 1,2mA
Measurement range: IEC 61557-2:
for UN=250V: 250kΩ...1000MΩ
for UN=500V: 500kΩ...1999MΩ
for UN=1000V: 1MΩ...3GΩ
| Voltage | Range | Resolution | Accuracy |
250 V | 0..1999kΩ | 1kΩ | ±（3% m.v. + 8 digits） |
| 2,00..19,99MΩ | 0,01MΩ | ||
| 20,0..199,9MΩ | 0,1MΩ | ||
| 200..1000MΩ | 1MΩ | ||
500 V | 0..1999kΩ | 1kΩ | |
| 2,00..19,99MΩ | 0,01MΩ | ||
| 20,0..199,9MΩ | 0,1MΩ | ||
| 200..1999MΩ | 1MΩ | ||
1000 V | 0..1999kΩ | 1kΩ | |
| 2,00..19,99MΩ | 0,01MΩ | ||
| 20,0..199,9MΩ | 0,1MΩ | ||
| 200..1999MΩ | 1MΩ | ||
| 2,00..3,00GΩ | 0,01GΩ | ±（4% m.v. + 6 digits） |
Notice: For value of insulation resistance below RISOmin
（250Ω for 250V, 500Ω for 500V, 1kΩ for 1000V） the accuracy is not specified
because the meter operates with the limitation of the converter current
Resistance measurement of protective and compensating connections
| Range | Resolution | Accuracy |
| 0,00..19,99Ω | 0,01Ω | ±（2% m.v. + 3 digits） |
| 20,0..199,9Ω | 0,1Ω | |
| 200..399Ω | 1Ω |
• max. voltage on the open terminals: 5V
• current with the closed terminals > 200mA
Low-voltage resistance measurement
| Range | Resolution | Accuracy |
| 0,0..199,9Ω | 0,1Ω | ±（2% m.v. + 3 digits） |
| 200..399Ω | 1Ω | ±（4% m.v. + 3 digits） |
•? sound signal for resistances lower than about 10Ω
• max. voltage on the open terminals – 5V
• max. current on the closed terminals – 10mA
Voltage measurement
DC voltage
| Range | Resolution | Accuracy |
| 0..600V | 1V | ±（3% m.v. + 2 digits） |
AC voltage 45...65 Hz （sinusoidal shape with harmonic contents < 2%）
| Range | Resolution | Accuracy |
| 0..600V | 1V | ±（3% m.v. + 2 digits） |
„m.v.” - measured value.
