AEMC instruments 6416, Руководство пользователя

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40 Clamp-on Ground Resistance Tester Model 6416
7.2.5 Power Supply
■ 4x1.5 V LR6 (AA) alkaline batteries or 4 NiMH batteries
■ Battery Consumption: 140 mA approximately
■ Battery Life: 12 hours, or 1440 30-second measurements approximately
NOTE: Extreme environmental conditions may interfere with the
internal microprocessor. Simply disconnecting the battery may be
enough to eliminate this malfunction.
7.3 ENVIRONMENTAL
Quality of
Influence
Limit of the
Domain
Quantities
Influenced
Typical
(3)
Max
(3)
Temperature
(-4 to 131) °F
(-20 to 55) °C
A,
Ω
(1)
, Uc 1 P/10 °C +r 2 P/10 °C +r
Relative
humidity
10 % to 90 % RH A,
Ω
(1)
, Uc P+r 3 P+r
Battery voltage
4 V to 6.5 V A,
Ω
(1)
, Uc 0.1 P+r 0.25 P+r
Position of
conductor
From the edge to
the center
A, Uc,
Ω
(1)
0.1 P+r
0.05 P+r
0.2 P+r
0.1 P+r
Position of
clamp
±90 °, 180 ° A, Uc,
Ω
(1)
0.2 P+r
0.1 P+r 0.4 P+r
0.25 P+r
Proximity to
magnetic mass
Steel sheet 1 mm
thick against air
gap
A,
Ω
(1)
, Uc 0.1 P+r 0.5 P+r
Magnetic field at
50/60 Hz
30 A/m A, Uc
2 mA
(2)
0.1 P+r
4.5 mA
(2)
0.5 P+r
Frequency of
the current
47 Hz to 800 Hz A, Uc P+r 2 P+r
Leakage current
at 50/60 Hz
I<10 A
R x
I<50 V
Ω
(1)
2 P+r 8 P+r
(1): Ω designates the quantities R, L, and Z.
(2): Offset on the current measurement.
(3): “P” = Accuracy at reference condition; “r” = 1ct on display resolution.