Power Quality Analyzer PowerPad
®
IV Model 8345
105
To avoid saturation, you must meet the following condition:
■
The range of the current sensor is I
nom
■
The order of the harmonic is n
■
The current of the harmonic of order n is I
n
For example, the input current range of a dimmer must be one-fifth of the current
range selected on the instrument. Any wave-train dimmers with a non-integer
number of periods are not compatible with AmpFlex
®
or MiniFlex
®
sensors.
This requirement does not take into account the instrument’s bandwidth limitation
that can lead to other errors.
17.2.6 Uncertainty of the Real-Time Clock
The uncertainty of the real-time clock is 80 ppm or less when the instrument is
3-years old and used at an ambient temperature of 50 °C.
This uncertainty is 30 ppm or less for a new instrument used at an ambient
temperature of 25 °C.
17.3 MEMORY CARD
The 8345 is delivered with a 16 GB SD card. Depending on their capacities, SD
cards can store:
SD Card Memory Capacity
16 GB
32 GB
Screenshots
50
50
Number of alarms
16,362
16,362
Searches for transients
210
210
Searches for shock waves
5
5
Inrush current capture,
RMS+PEAK – 10 min
1
1
Trend recording of all
parameters
1 recording for 40 days
(3 s sampling period)
1 recording for 84 days
(3 s sampling period)
Single trend recording of
all parameters per
EN 50160
3 days
(200 ms sampling period)
6 days
(200 ms sampling period)
15 days
(1 s sampling period)
30 days
(1 s sampling period)
45 days
(3 s sampling period)
90 days
(3 s sampling period)
The file size will increase as the recording interval decreases and the recording
duration increases.
n=
∞
n=1
[n. I
n
] < I
nom
∑