Xylem 6308DT INDUSTRIAL DISSOLVED OXYGEN TRANSMITTERS - Manual (Page 8)

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1. Connect the AC line to the rear of the instrument. The model 6308PT can
be used with 115VAC or 230VAC 50/60 Hz. Power consumption is
6-watt. Make sure the EARTH connector is connected to the earth
lead of the AC power line.
2. Connect the proper load to the output relays. Make sure that the load
does not exceed the relay rating, 5 Amp at 115VAC and 2.5 Amp at
230 VAC.
3. Set the proper load to the 4-20mA output connector. Make sure that the
load impedance is less than 500 Ohms.
CAUTION: MAKE SURE YOU CONNECT THE AC POWER CORD
TO THE CORRECT AC TERMINALS. CONNECTING
INCORRECTLY MAY DAMAGE THE UNIT PERMANENTLY.
d) Turning ON/OFF the instrument.
By just plugging the unit to a correct AC voltage, the unit will be ready for use.
There is no Power key so unplugging and plugging the unit will turn OFF or turn
ON the unit respectively. After the unit is turned on, it will perform some basic
self- diagnostics and will display "OK" or "BAD." If you received any "BAD"
messages, turn OFF the unit and turn it ON again. (See IX. ERROR DISPLAYS
AND TROUBLESHOOTING). If the message persists then you might need to
call your distributor. (See IX. TROUBLESHOOTING).
After the self-diagnostic is complete the temperature will be displayed on the
lower part of the LCD screen and you are ready to make DO calibration or
measurements. Just immerse the probes halfway to the liquid. If possible, do not
allow the probes to touch any solid object in the solution. There should be no air
bubbles around the probes either. Shaking or moving the probes vigorously before
recording any measurement will dislodge any bubbles formed in the probes.