Owner's manual

YSI 5200A

to these measurements. erefore, it is essential to have accurate measurements

at the sensors’ location. Locate the sensors of the probe assembly according to the

following specications.

Place the sensor end of the probe assembly:

• in a location that represents the entire system

• where the water ow is at least 3 inches per second (7.6 cm/sec) if using

the 2.0 mil PE membrane or at least 6 inches per second (15.24 cm/sec)

for 2.0 mil Teon membrane

• in a location that is free from debris (e.g. algae); ideally at a 45˚ angle from

vertical position and directed with the ow - gure 3.10

Figure 3.10

• in a well mixed, free-owing area; midstream and mid-depth typically gives

representative readings; the probe assembly and cable are fully submersible

up to the cable connector

• submersed at all times so liquid level uctuations do not expose the sen-

sors to the atmosphere

• so probe cabling is not routed near rotating machinery and/or equipment

involving electrical switching or regulation

• so that the probe assembly and cabling are located away from sources of

electrical interference such as UV sterilizers, orescent lighting, ballasts,

pumps, any high voltage peripheral devices, etc.

CAUTION: run high and low voltage cabling through separate bulkhead tting

and conduit

• where regular maintenance, including calibration can easily be done.

Calibrations are performed using the 5200A front panel.

Installation and Wiring

Note:

- All YSI sensors, except the temperature sensor on the 5561 cable, are eld

replaceable. Individual sensors can be ordered and replaced by the user

without returning the probe/cable assembly to the factory.

YSI 5561 Probe Assembly

e YSI 5561 probe assembly includes a DO and temperature sensor. e DO sensor

is shipped with a dry membrane. A new membrane with fresh electrolyte must be

installed on the DO sensor prior to use. Complete instructions are provided with

the sensor and membrane kits.

Notes:

- Replace the dry, shipping cap membrane with a 2 mil PE (blue) membrane

or 2.0 mil Teon (gray) membrane following the instructions provided

with the membrane kit.

- Do not discard the calibration/storage cup. It is used for calibrating and

storing the sensor when not in use.

- Allow approximately 10 to 15 minutes aer the 5200A is powered on, or

aer servicing the DO sensor, for the polarographic sensor to stabilize.

Figure 3.11 shows the external parts of the YSI 5561 probe assembly.

Figure 3.11

Installation and Wiring