1 concentration measurement, Operation—4–20 ma/hart – Hach-Lange SI792 C, SI792x C, SI792x C-FF, SI792x C-PA User Manual User Manual
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Operation—4–20 mA/HART
36
acceptable range, “Err” will be shown and the value will not be
accepted. To exit the menu and return to the measurement mode, press
CONF
and
ENTER
.
Example: Set the output start point for the 4 mA signal to be 10.0 mS
and the output end point to be 100 mS for the 20 mA signal.
1. Press
CONF
, enter passcode:
1200
. The display will show Conf and
then out.1MNU.
2. Press
ENTER
to access the output setup menu. The display will
show
CELL
.
3. Press
ENTER
,
ENTER
,
ENTER
to reach the 4 mA submenu. The
display will show o1.4mA.
4. Use the
UP ARROW
and
RIGHT ARROW
to edit the value to read
10.0 mS value. Press
ENTER
to save the value. The display will
show o1.20mA.
5. Use the
UP ARROW
and
RIGHT ARROW
to edit the value to read
100.0 mS value. Press
ENTER
to save the value. The display will
show o1.FtME.
6. Press
CONF
and
ENTER
to exit the configuration menu.
The transmitter remains in HoLD mode for approximately
20 seconds after calibration and returns to the measurement
mode.
5.2.1.1 Concentration measurement
For the solutions listed in
, the transmitter determines the
concentration from the measured conductivity and temperature values
in percent by weight.
The measurement error is made up of the sum of measurement and the
stored accuracy of the concentration curves (see
).