SATEC PM296 - Manual (Page 11)

Chapter 1 Introduction 3
Waveform Recorder
for waveform capture and logging on different events.
Along with the disturbance monitor it allows for capture and recording of various
types of disturbances with a duration from one millisecond and up to tens
seconds - transients, outages, sags, surges and deviations in voltage level.
Event and data logging on different events with real time clock and 1-Mbyte
non-volatile memory:
• instrument switch on/off
• instrument setup change
• external status change
• event/alarm setpoints operations
• clock update
Each event record stores: date and time stamp, event name, log value (after
alarm setup operation) and effect (operation or release).
Data logging is used for: load profile logging (at 5,15 or 30 minute intervals),
TOU energy counters logging and data logging after alarm setup operation or
new state of digital status input.
Calculation of memory size is according to the following:
Log name Number of bytes
in record
Number of daily/
monthly records
Number of
days/months
Memory size
(bytes)
Event log 14 NR (up to 10) daily ND 14 * NR * ND
Load profile log NB = 4 * NP+8 NR =1440/TI - daily ND NB * NR * ND
TOU energy log NB = 4 * NP+8 NR = 1- monthly NM NB * NR * NM
Alarm data log NB = 4 * NP+8 NR (up to 5) - daily ND NB * NR * ND
Total memory 524288
Where:
NP = number of parameters in a record (up to 16) and 8 - number of bytes for timestamp;
TI = time interval between two records, minutes.
Example:
Event log must store data up to 60 days (ND=60)
Load profile log - up to 60 days and every record consist of NP=5 parameters: voltages per
phase, active and reactive powers integrated TI=5 minutes),
Monthly TOU energy log - 60 months and every record consist of NP=10 parameters - 4
energy tariffs and 4 TOU Maximum Demand registers, Active and Reactive Energy
registers),
Alarm Data log - 60 days, every record consist of NP=13 parameters - 3 voltages, 3
currents, active, reactive and apparent powers, frequency, THD voltage of phases L1, L2
and L3,
Data logging requires the following memory:
Log name Number of bytes
in one record Number of
daily/monthly
records Number of days
(months) Memory
size, in
bytes
Event log 14 10 60 8400
Load profile log 4 * 5+8 =28 1440/5= 288 60 483840
TOU energy log 4 * 10+8 = 48 1 60 2880
Alarm data log 4 * 13+8 = 60 5 60 18000
Required memory 513120