Gossen Metrawatt M817S Mains-analysis device, Mains analyser M817S Fiche De Données
Codes de produits
M817S
6-8
Journal Limit
Journal Limit
Journal entry
settings
settings
Energy Platform allows power parameters to be trended using periodic readings that are
stored in a journal. Statistical information is always captured regardless of the limit
settings, so users will never be without a trend even if he/she did not set the limits
correctly. The system collects data even when no disturbances occur by recording
periodical statistical data (By Time).
Page 6-9 shows one example of how to set entries under the Standard - Basic
parameter. The same procedure applies when setting entries under other journal
parameters.
Page 6-10 features the list of journal parameters that can be trended.
Logging data by
limits
limits
Limit methods allow users to set the threshold units by which high and low limits of
voltage trigger and current trigger are calculated. Thresholds are set in ranges with high
limit (threshold above the normal range) and low limit (threshold below the normal
range). The following threshold limits are used to trend journal parameters:
Very High: specifies an absolute limit for comparison that is higher than the high limit
High: specifies an absolute limit for comparison that is higher than the low limit
Low: specifies an absolute limit for comparison that is lower than the high limit
Very Low: specifies an absolute limit for comparison that is lower than the low limit
Deadband: specifies how much a value can change before another event is recorded
The Very high must be greater than High, Very low less than Low. Deadbands or
sensitivity is used to record incremental changes in the parameter besides when limits
are crossed. The hysteresis values assigned to limits are fixed and not programmable by
the user. All limit values are used to determine if corresponding reporting or logging
action should take place.
Logging data by
time
time
Energy Platform is able to measure periodic samples as well as take snapshots of the
voltage and/or current waveform. The Journal Interval menu (see page 6-12) allows
users to set the time of how often the instrument will record power parameter values,
demand and energy, and harmonics.
NOTE
Users can record data simultaneously by limits and by time. Make sure to enable the
parameters to trend under Journal Limit and Journal Interval.