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8.2 OPERATING CONDITIONS AND TESTING
• Environmental operating conditions:
Environmental temperature range: from -10°C to +50°C.
Relative humidity (R.H.): from 20% to 80%.
• Storage temperature:
from -20°C to +60°C.
• Condensation:
non-condensing environment.
• Insulation resistance:
≥ 500 MΩ between voltmeter input connectors short-circuited between each other and instrument frame, between
power socket and instrument frame.
≥ 2 MΩ between voltage and current inputs.
• Insulation voltage:
Tested to 2000 Vrms at 50 Hz for 60 seconds between voltmeter input connections (including neutral).
Tested to 3000 Vrms for 60 seconds between each connector and the instrument frame.
• Construction standards:
Safety : IEC 1010-1, EN 61010-1, 600V cat. III
EMC : EN 50081-1, EN 50082-1, EN55022.
IEC 801-2, ENV50140 IEC 801-3, IEC 801-4
Conformity : CEE 89/336 (EMC)
CEE 73/23 - CEE 93/68 (Low Voltage Directive)
8.3 POWER REQUIREMENTS
• External mains power:
230V ∼ ± 10% 50/60 Hz or 110V ∼ ± 10% 50/60 Hz
• Consumption:
4 VA.
• Internal battery power:
6V 940mAh N1-Cd battery with five 1,2V 940mAh elements in series.
8.4 PRIMARY MEASUREMENTS
• Measuring method:
fixed sampling, A/D conversion.
• Sampling frequency:
2,5 KHz.
• Number of samples per phase:
250 (100 msec).
• Measuring frequency:
~ 1,2 sec.
• Automatic zero regulation:
every 1 minute.
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