44
10.
TE C HNIC AL C HAR AC TE R IS TIC S
10.1 REFERENCE CONDITIONS
Quantities of influence
Reference conditions
Ambient temperature
23±3°C.
Relative humidity
50%RH±10%.
Battery voltage
6V±0.2V.
Magnetic field
< 40A/m DC.
No AC field.
Electric field
< 1V/m.
Operating position
Clamp horizontal.
Position of the conductor in the clamp
Centred.
Measurement environment
No adjacent conductors carrying
current within 10cm.
Proximity to magnetic mass
> 10cm.
Loop resistance
Non-
inductive resistance (20Ω for the
voltage measurement).
Measured current, sinusoidal frequency
Frequency 50Hz.
Level of distortion < 0.5%.
Spurious current in loop resistance
measurement
Zero for the resistance and inductance
measurements.
< 3.75A for the voltage measurement.
10.2 ELECTRICAL CHARACTERISTICS
10.2.1
LOOP RESISTANCE MEASUREMENT
Measurement range:
- Loop ohmmeter function: 0.01
Ω
to 1500
Ω
. 1500-
counts
display.
Measurement ranges (
Ω
) Resolution (
Ω
)
Intrinsic uncertainty
0.010 to 0.099
0.001
±1.5% ±0.01
Ω
0.10 to 0.99
0.01
±1.5% ±2R
1.0 to 49.9
0.1
±1.5% ±R
50.0 to 99.5
0.5
±2% ±R
100 to 199
1
±3% ±R
200 to 395
5
±5% ±R
400 to 590
10
±10% ±R
600 to 1,150
50
About 20%
1,200 to 1,500
50
About 25%
Alarm: range of threshold from 1
Ω
to 199
Ω
.
R=resolution
