
22
GMC-I Messtechnik GmbH
10.2 METRATESTER 5+ Test Instrument
Measurements During Operation
Overload Capacity
Intrinsic Uncertainty and Measuring Uncertainty
Reference Conditions
Ambient temp.
+23
°
C
±
2 K
Relative humidity
40
…
60%
Line voltage
230 V
±
1%
Measured quantity
frequency
50 Hz
±
0.2%
Measured quantity
waveshape
Sine (deviation between effective and rectified value:
±
0.5%)
Measuring Qty.
Measuring Range
Resolution U
no-load
R
i
I
K
I
N
Protective
conductor
resistance
0
…
19.99
Ω
10 m
Ω
< 20 V
−
—
> 200 mA
Insulation
resistance
0.05
…
19.99 M
Ω
10 K
Ω
600 V
−
Approx.
100 k
Ω
< 10 mA > 1 mA
Equivalent
leakage current,
0
…
19.99 mA
∼
10
μ
A
28 V
∼
2 k
Ω
< 20 mA —
Contact current
(verification of
absence of volt-
age by means of
current measure-
ment)
0
…
1.999 mA
∼
1
μ
A
2 k
Ω
Differential
current
0,01
…
19.99 mA ~
10
μ
A
Measuring Quantity
Measuring Range
Resolution
Line voltage
207
…
253 V ~
1 V
Load current via mains outlet
0
…
16.00 A ~
10 mA
Load current via mains outlet, differential current
19 A, 5 min.
All other measured quantities
250 V continuous
Measured Quantity
Intrinsic Uncertainty
Measuring Uncertainty
Protective conductor resistance
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)
Insulation resistance, 0
…
19.99 M
Ω
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)
Equivalent leakage current
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)
Verification of absence of voltage by means
of current measurement (contact current)
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)
Differential current
±
(4% rdg. + 5 d)
±
(10% rdg. + 5 d)
Line Voltage
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)
Load current via mains outlet
±
(2.5% rdg. + 2 d)
±
(10% rdg. + 5 d)