HT instruments HT9022 - Manual (Page 46)

HT9022
EN - 44
5.8.1. Virtual key “Zero”
By pressing key F2 (Zero), the average value of measured current is zeroed.
WARNING
Note: carry out current zeroing before clamping the conductor.
5.8.2. Key F3 “Run”
WARNING
For any frequency of 50Hz, 60Hz and DC, 32 samples are taken in each half-
period for 100 half-periods, while for a frequency of 400Hz 8 samples are
taken every half-period for 100 half-periods.
In Fix mode, the event is detected when the RMS value of the current exceeds
the set current threshold value.
In Var mode, the event is detected when the difference between the RMS value
of a half-period and that of the previous one exceeds the set current threshold
value.
The maximum number of events which can be saved in a single campaign is
10 and the maximum number of storable recordings is 20.
Pressing key F3 (Run) starts an inrush current recording and
the indication relevant to key F3 turns into Stp. On the right, a
sample screen, which contains:
• the message “Log”, to indicate that recording is in progress;
• indication “03/10”, relevant to the last detected event;
• indication of date/time and current value reached by the last
detected event.
By pressing key F3 (Stp) again, recording is stopped and the
data are stored in the memory.
Mod Zero Stp Mem
50Hz 03/10
24/01-16:30:49
19 A
Fix 15A
1/1
Log
24/01-16:30:50
If 10 events are detected while recording, recording is automatically stopped.
5.8.3. Key F4 “Mem”
By pressing key F4 (Mem), the screen to the side appears,
which lists the Inrush Currents saved in the memory.
Each displayed page lists 5 memory locations and, by pressing
key F1 (▼), it is possible to scroll through each single location. ▼
Del OK Esc
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25/01-17:05:00
Press key F2 (Can) to open the drop-down menu shown on the
screen to the side. At each subsequent pressure of key F2, the
cursor will scroll through the available items, as follows:
• Del. Tot.: it deletes all InRush current data saved in the
memory;
• Del. Last: it deletes the last information saved in the
memory.
When pressing key F3 (OK) once, the display shows the
message “
Delete?” ; pressing key F3 again confirms the
selected item.
▼
Del OK Esc
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I04:24/01-16:53:38
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25/01-17:05:00
Del.Tot.
Del.Last