YSI PRO20 User Manual page 10

CONNECTING THE CABLE
The Pro20 is designed for field and laboratory use. It is compatible with two
different cable options:
1) The field rugged cable is available in standard lengths of 1, 4, 10, 20, 30, and
100 meters with special lengths available between 30 and 100 meters. This
cable has a built in temperature sensor and includes a port for the dissolved
oxygen sensor.
2) The ProBOD is a 1 meter probe/cable assembly with built in Polarographic
dissolved oxygen and temperature sensors. It has an AC powered motor for
sample stirring and is designed to fit into a 300 ml BOD bottle.
To connect the cable, align the keys in the cable connector to the slots in the
instrument connector. Push together firmly and then twist the outer ring until it
locks into place (Figure 4). This connection is water-proof.
Figure 4, Note the keyed connector.
When disconnected, the sensor and cable's sensor connectors are
NOT water-proof. Do not submerge the cable without a sensor
installed. When disconnected, the cable's instrument connector and
the connector on the instrument maintain a waterproof, IP-67
rating.
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