Honeywell APT2000 Series, Руководство пользователя

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CAL
CAL
ENTER
Operation
21
Calibration
In the calibration mode the cell factor can be modi-
fied in two ways. If the cell factor of the sensor in use
is known under consideration of the installation con-
ditions, it can be entered directly. Furthermore, the
cell factor can be determined with a known calibra-
tion solution under consideration of the temperature.
Activate with
CAL
,
confirm/continue with
ENTER
,
abort with
CAL
➜
ENTER
During calibration the Transmitter is
in the Hold state. The loop current
is frozen.
When the calibration mode is exited, the Transmitter
remains in the Hold state for safety reasons. This
prevents undesirable reactions of the connected pe-
ripherals (e.g. limit switches, controllers) due to in-
correct settings. The measured value and Hold are
displayed alternately. Now you can check whether
the measured value is plausible and specifically end
the Hold state with
ENTER
or repeat calibration with
CAL.
When you end the Hold state, the Transmitter
will return to measuring mode after 20 sec (mea-
sured value stabilization).
Calibration by input of cell factor
Activate calibration by pressing the
CAL
key.
Using the
Y
,
"
keys enter
mode code “1100” and then press
ENTER
.
Using the
Y
,
"
keys enter the cell
factor. The lower display shows the
conductivity value.
A change in the cell factor also
changes the conductivity value.
When there has not been an entry
for approx. 6 sec, conductivity and
temperature are displayed alter-
nately.
Press
ENTER
to confirm the cell
factor.
The Transmitter remains in the Hold
state. You can end the Hold state
with
ENTER
. After 20 sec (mea-
sured value stabilization) the Trans-
mitter returns to measuring mode.