Data Logger (Recorder); Description Of The Data Logger Menu; Enabling The Data Logger; Setting The Sampling Frequency - ABB SACE Emax Series Installation, Service And Maintenance Instructions

16.4

Data logger (recorder)

The data logger function is available on the PR122/P and PR123/P units and it can be used to save the instantaneous values of certain analog and
digital measurements automatically in a large-sized memory buffer. The data can easily be downloaded from the unit using either the SD-Pocket
application with a Bluetooth port, or the SD-TestBus application via a Modbus bus, and transferred to any personal computer for processing. The
function stops the recording every time a trip occurs in order to facilitate failure analysis.
1 6 . 4 . 1 General characteristics
Number of analogue channels:
Number of digital events:
Maximum sampling frequency:
Maximum sampling time:
1 6 . 4 . 2

Description of the Data Logger menu

You can access the data logger menu from the Settings menu in the PR122/P and PR123/P units:
Settings
Main Frequency
Modules
Data logger
Data logger

1 6 . 4 . 2 . 1 Enabling the Data Logger

The data logger can be enabled by inputting a password:
Data logger
Enable
Toroid size
16.4.2.2

Setting the sampling frequency

On the menu, you can specify the frequency with which the measurements are saved, choosing from 4 fixed frequencies, i.e. 600 Hz, 1200 Hz,
2400 Hz or 4800 Hz.
Data logger
Enable
Sampling freq.
Stop event
The maximum data recording times (see also par. 16.4.3) depend on the selected frequency and are illustrated in the following table:
Frequency
600 Hz
1200 Hz
2400 Hz
4800 Hz
Note: Selecting sampling frequency is an important step. In fact, presence of high-order harmonic waves may cause aliasing on processing of collected data. Use maximum
frequency when a harmonic distortion is available, otherwise data processing may give results which do not match actual system conditions.
16.4.2.3 Setting the standard stop events (triggers)
You can select one of the following stop events (triggers), see also par.16.5.2:
1. None
2. Any alarm
3. L timing
4. Any trip
Data logger
Enable
Sampling freq.
Stop event
L2234
Model
L2778
7
64
4800 Hz
27s (- sampling frequency 600 Hz)
4/9
1/1
Password
Enter ↵
Off
1/6
Sampling freq.
600 Hz
Enter ↵
1200 Hz
2400 Hz
On
RECORDING TIME
27.3 s
13.6 s
6.8 s
3.4 s
3/4
Stop event
None
Enter ↵
Any Alarm
L Prealarm
Any Trip
None
Custom
PWD + Enter ↵
0***
Enter password
1/4
600 Hz
1/5
None
Apparatus
Doc. No.
1SDH000460R0002
Enable
Off
On
Scale
Emax
Page No.
128/158
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Off