EUTECH INSTRUMENTS ?lpha-pH500, Руководство пользователя, Страница: 17 / 32

6.2 Output Range Setting
Output of pH 500 transmitter is via the 2-wire power supply
loop. Both the 4 mA and 20 mA output can be assigned to
specific pH or ORP values, for a more refined output.
SETUP
HOLD
1. Press ENT key and use
▲
or
▼
keys to scroll till LCD
displays ‘ r n g ’. Press ENT again. Upper display
shows pH value, ‘0.00 pH’ (or – 1000 mV) while lower
display shows ‘
r 4.0 ’. This is the set up page for the
pH or ORP output range setting for the 4mA output
current.
2. Assign pH or ORP value to 4 mA output current. Use
▲
or
▼
keys to change pH or ORP value. Press ENT
to accept value.
3. Upper display shows pH value,’ 14.00 pH ’ (or 1000 mV) while lower display
shows ‘ r 20.0 ’. This is the set up page for the pH or ORP output range
setting for the 20mA output current.
4. Assign pH or ORP value to 20 mA output current. Use
▲
or
▼
keys to
change pH or ORP value. Press ENT to accept value.
5. Press both
▲
or
▼
keys together to return to ‘ MEAS ‘ mode.