NF AC Voltmeter/Noise Meter M2174/M2177
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| High Sensitivity | Auto-ranging | |
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| M2174 | M2177 | |
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 10μVrms fullscale (M2174)30μVrms fullscale (M2177)Automatic range selection (M2177)Maximum six types of filters can be built-in (for auditory weighting and other functions)Indication response : true rms response, average response and quasi peak responseAC and DC outputSensitivity adjustment (useful in dB and SN ratio measurements)dB linear scale (option) |
| Voltage measurement range | M2174 : 10µV to 100Vrms/F.S. M2177 : 30µV to 100Vrms/F.S. |
| Frequency range | 5Hz to 500kHz |
| Input impedance | approx. 1M ohm 20pF max. |
| Max. inuput voltage | 30mV to 100V range : AC ± DC peak value ± 250V 10µV to 10mV range : AC ± 5Vpeak, AC ± DC peak value ± 250V |
| Indication accuracy (average reponse, reference to F.S.) |
10µV range : 10Hz to 30kHz ± 10% (M 2174 only) 30µV range : 10Hz to 30kHz ± 5% 100µV range : 10Hz to 100kHz ± 5% 300µV to 100V range : 5Hz to 500kHz ± 10% |
| AC output | 1V (F.S., no load), output impedance : approx. 50Ω typ. |
| DC output | 1V (F.S., no load), output impedance : approx. 50Ω typ. |
| Meter | Taut-band with mirror type |
| Weighting network | Built-in 4 types filter * : JIS-A (JIS C 1502A), JIS-C (JIS C 1502C),DIN-45405 (AUDIO), CCIR-ARM Possible to add another 2 filters as option |
| Power requirements | AC100V, 120V, 230V, switchable |
| Dimensions (mm) | 140(W) X 177(H) X 300(D) |
| Weight | approx. 3.5kg |
| * : Characteristics of weighting filters (built-in) |
| JIS-A (JIS-C1502A) JIS-C(JIS-C1502C) |
DIN45405 (AUDIO) | CCIR (ARM) |
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