EUTECH INSTRUMENTS ALPHA PH 500 PHORP 2-WIRE TRANSMITTER (REVISION 1), Instruction Manual

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SETUP
HOLD
5.2 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.
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’ (or – 1000 mV) while lower display shows ‘ r 4.0 ’.
2. Assign pH or ORP value to 4 mA output current. Use
▲ or
▼
keys to change pHor ORP value. Press ENT to accept
value.
3. Upper display shows pH value,’ 14.00 ’ (or 1000 mV) while
lower display shows ‘ r 20.0 ’.
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.