Siemens 9810 Series, User Manual, Page: 153 / 218

Power quality
Input 1 value
Input 2 value
Input 3 value . . .
Data Log register
(trigger record)
1 record triggered
10 Pre-trigger Records 5 Post-trigger Records
Data log set is 10 + 1 + 5 = 16
Depth
Buffer Depth
6 x 16
= 96
16 x 16
= 256
Burst data log set = [pre-trigger records] + [post-trigger records] + [actual trigger
record] = 10 + 5 + 1 = 16.
When burst data logging is enabled, both Buffer Depth and Depth setup registers
must be set to a positive integer multiple of the data log set.
Use the system frequency to calculate the number of records needed to capture 1
second of data:
• For 60 Hz, total number of records per second = 60 cycles/second x 2 half-
cycles = 120
• For 50 Hz, total number of records per second = 50 cycles/second x 2 half-
cycles = 100
You can use the Power Quality setup assistant in ION Setup to specify how many
seconds of pre-trigger and post-trigger data you want to capture. ION Setup
automatically calculates the required number of records based on your input.
Waveform capture
The meter’s Waveform Recorder modules capture waveform data.
The Waveform Recorder module captures one waveform record every time its
Record input is triggered. A waveform record is defined by the module’s Format
setup register, expressed as (number of samples per cycle) x (number of cycles
per waveform record). For example, if
Format is set to 512x4, that means one
waveform record is made up of 4 cycles of waveform data at 512 samples per
cycle resolution.
Standard waveform capture
The meter’s Waveform Recorder modules support standard waveform capture.
A standard waveform capture saves 1 buffered waveform record at the Record
trigger time. Only pre-trigger waveform data is captured in this mode. No post-
trigger waveform cycles are recorded.
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