Intrinsic Uncertainty And Operating Uncertainty; Power Supply; Environmental Conditions - AEMC Megohmmeters 6522 User Manual

3.3.4 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°
1
E = influence of the supply voltage within the limits indicated by the
2
manufacturer
E = influence of the temperature between 0 and 35°C (32 and 95°F)
3

3.4 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:
■ 1500 5-second insulation measurements at 1000V for R = 1 MΩ, at the
rate of one measurement per minute.
■ 3000 5-second continuity measurements, at the rate of one
measurement per minute.

3.5 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