User manual

PQM-702, PQM-703 Operating Manual
92
6.3 Transient module
Transient detection module
Number of input channels
4 (L1-PE, L2-PE, L3-PE, N-PE) not galvanically isolated
Maximum input voltage
760 V
RMS
Peak input voltage
8000 V
DC voltage range
±6000 V
Analog pass band (-3dB)
2.5 MHz
A/C converter
4-channel, 12-bit, simultaneous sampling in all channels
Sampling frequency
10 MHz, 5 MHz, 1 MHz, 500 kHz, 100 kHz (user selectable)
Waveform recording time
from 2000 to 20000 samples (from 200 µs to 200 ms, depending on
settings)
Pretrigger time
from 10% to 90% of the recording time
Detection method
- amplitude (50 V…5000 V)
- slew rate (dV/dt; from 100 V/500 µs to 100 V/5 µs)
Inactivity time after detection
3 s
6.4 Measured parameters - accuracy, resolution and ranges
6.4.1 Reference conditions
Tab. 6. Reference conditions.
Reference conditions
Ambient temperature
0C…+45C (see also 6.4.2)
Relative Humidity
40…60%
Voltage unbalance
≤ 0.1% (applies only to 3-phase systems)
Continuous, external magnetic
field
≤ 40 A/m (fixed)
≤ 3A / m (variable) for 50/60 Hz frequency
DC voltage and DC current
zero
Waveforms
sinusoidal
Frequency
50 Hz ±0.2% or 60 Hz ±0.2%
6.4.2 The measurement uncertainty due to ambient temperature
Basic uncertainty given in technical specifications is guaranteed for the ambient temperature
range of 0C…+45C. Outside this range, use an additional multiplier (M), which increases the
specified basic uncertainty to the actual measurement uncertainty. Fig. 42 shows a graph of M mul-
tiplier, depending on the ambient temperature within nominal operating temperatures. The multiplier
has a value of 1.0 in the temperature range of 0C…+45C. Above +45C and up to +55C, the
multiplier rises in linear manner up to 2.0. Below 0C (down to -20C), the multiplier rises in linear
manner up to 1.8.
Example: Basic uncertainty for RMS voltage measurement is ±0.1% U
nom
within ambient temp.
range of 0C…+45C.
 at -20C, measurement uncertainty is ±0.18% U
nom
(multiplier 1.8)
 at -10C, measurement uncertainty is ±0.14% U
nom
(multiplier 1.4)
 at 0C, measurement uncertainty is ±0.1% U
nom
(multiplier 1.0)
 at +45C, measurement uncertainty is ±0.1% U
nom
(multiplier 1.0)
 at +55C, measurement uncertainty is ±0.2% U
nom
(multiplier 2.0)