Intrinsic Uncertainty And Operating Uncertainty; Power Supply; Environmental Conditions; Mechanical Specifications - AEMC 6526 User Manual

3.4 Intrinsic Uncertainty and Operating Uncertainty

These megohmmeters comply with standard IEC 61557, which requires that the operating uncertainty (called B) must be
less than 30%.
In insulation and continuity measurements:
where:
A = intrinsic uncertainty
E = influence of the reference position ± 90°
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E = influence of the supply voltage within the limits indicated by the manufacturer
2
E = influence of the temperature between 0 and 35°C (32 and 95°F)
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3.5 Power Supply

The instrument is powered by six 1.5V alkaline AA (LR6) batteries.
The voltage range ensuring correct operation is from 6.6V to 9.6V.
Typical life between charges:
■ Insulation:
1500 5-second insulation measurements at 1000V for R = 1 MΩ, at the rate of one measurement per minute
2500 5-second measurements at 500V for R = 500kΩ, at the rate of one measurement per minute
6000 5-second measurements at 100V for R = 100kΩ, at the rate of one measurement per minute
■
Continuity: 3000 5-second continuity measurements, at the rate of one measurement per minute

3.6 Environmental Conditions

Indoor use
Range of operation: -20 to +55°C (-4 to 131°F) and 20 to 80% RH
Range of storage (without batteries): -30 to +80°C (-22 to 176°F) and 10 to 90% RH without condensation
Altitude: <2000m (6562ft)
Degree of pollution: 2

3.7 Mechanical Specifications

Dimensions (L x W x H): 211 x 108 x 60mm (8.31 x 4.25 x 2.36")
Weight: approximately 850g (1.87lb)
Ingress protection:
■ IP 54 per IEC 60529, not in operation
■ IK 04 per IEC 50102
Drop test: per IEC 610
Megohmmeter Model 6526/6532/6534
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