IOP 011C.3
Effective Date: 1/09/2017
Page 2 of 6
PROCEDURES:
I.
Meter preparation and maintenance
A.
Program the DO meter to allow it to recognize the Poloragraphic 2003 model probe
(engraved on the side of sensor body). See the system setup menu section of the Pro20
Instruction Manual for directions. This procedure is done only during initial setup or
when changing probe models.
B.
Battery installation or replacement of two alkaline C-size batteries.
1.
Use a screwdriver to remove the 4 screws on the back cover of the meter.
2.
Lift off the battery-chamber cover.
3.
Install the batteries according to the inscribed battery symbols on the inside of
the battery chamber. Make sure batteries are in correct polarity.
4.
Close the battery chamber cover and secure cover with the 4 screws.
5.
Press and release the
ON/OFF
button (
☼
) on the front of the instrument. The
LCD will come on; if not, consult the trouble shooting guide in the Pro 20
Instruction Manual.
6.
A battery symbol will appear in the lower, left corner of the display to indicate
low batteries when about 1 hour of battery life remains.
7.
Follow this procedure when the low battery symbol appears in the display.
8.
To turn off the unit, press and hold the
power /backlight
key for three seconds.
C.
Connect the cable/probe assembly to the meter.
1.
Align the keys in the cable connector to the slots in the meter connector.
2.
Push together and twist the outer ring clockwise until it locks into place.
3.
To remove the probe, twist the outer ring until keys and slots are aligned and
then pull apart the connectors.
D.
Initial sensor installation and maintenance. This section can be skipped if not replacing a
sensor.
1.
Remove/unscrew the metal guard.
2.
To properly install a new sensor, insure that both the sensor connector and
sensor port on the cable stay dry during this entire procedure.
3.
If replacing the old sensor, remove it by twisting the sensor counter-clockwise.
4.
Align the pin in the bulkhead and the sensor connector and push the sensor into
the connector on the cable until it is firmly seated and only 1 o-ring is visible on
the sensor.
