Each time you press
I
, load correction will ensure you get the
exact load requested. Load correction can be enabled and
disabled from
OPTIONS
.
•
Load can be removed at any time by pressing the red
O
key.
The first
TEST
instrumentation page shows the real-time Voltage
and Frequency in large fonts, together with the power in kVA, cos
φ
and kW. Along the top, the Status line shows that we are in
MANUAL
, and 4 minutes and 32 seconds has elapsed since the
last load accept. The selected load is displayed on the top right of
the status line.
Use this page when initially adjusting the AVR and governor
settings.
6. View the Instrumentation
•
Press
PAGE
to change to the next instrumentation page.
After four presses of
PAGE
you will be back to page one.
The next two
TEST
pages shows all the true rms three phase
measurements of Voltage (V), Frequency (Hz), Current (A),
Power (both kW and kVA) and Power Factor (Cos
φ
).
The second and third instrumentation pages provide all the
electrical data required when full-load testing. Displayed on
the right are the voltage and frequency; below each are the
maximum and minimum values for the last load change.
Note that page two shows line-line voltages, whereas page three
shows line neutral voltages.
The fourth
TEST
page provides a graphical view of the voltage
and frequency when the last load was applied.
The voltage and frequency graphs display the first 6 seconds of
the last load change, as a percentage of the supply voltage and
frequency rating.
Use this page when testing governor and AVR transient response.
7. Using Automatic Load Control
At any time you can change between manual and automatic
load control.
•
Press
AUTO
for automatic load control. Press F2 again to
return to
MANUAL
.
•
A pre-programmed sequence of up to 16 loads can set
up by pressing the
EDIT TEST
key.
Again, use the
+
and
–
keys to change the selected value. Press
SELECT
to select either %, cos
φ
or time.
Pressing
NEXT
moves down to the next line. You can press
COPY
to copy the selected value down to the next line.
•
Press
OK
to exit
EDIT TEST
.
•
Pressing the green l key will start the sequence.
•
Load can be removed, and the automatic sequence stopped,
by pressing the red
O
key.
The status of the automatic test is shown on the right of the
status line.
Any sequence that is running will be paused if
MANUAL
,
EDIT
TEST
or
SETTINGS
are pressed. Pressing I will restart a paused
load sequence.
Whilst the test is running the
+
and
–
keys can be used to
quickly override the selected load. Press I to apply the new
load selected.
Froment
Sigma IHT Version 4 - Quickstart Guide
