YSI 5200A
35
YSI 5200A
34
Step 2 Locate and Install Probe/Cable Assembly
Use a YSI probe /cable assembly 5561 (with DO and temperature sensors) or a YSI
5562 (with DO, temperature, conductivity, pH, and ORP sensors) on the 5200A.
See
Chapter 4 “Configuration”
, beginning on page 66, for directions on configur-
ing the 5200A sensor systems. User defined sensor configuration options include:
-
Display Formats (i.e. units of measure. For example, mg/L or % saturation,
°C or °F)
-
Set point, Control, and Alarm values and ranges
-
Control and Alarm relay enabling
After selecting a probe/cable assembly and installing the sensors on the cable, see
Connect Probe Assembly
- page 60.
Location Considerations
Measurements taken at the probe location are data logged and processed by the
5200A instrument. Output control and alarm devices are configured to respond
to these measurements. Therefore, it is essential to have accurate measurements
at the sensors’ location. Locate the sensors of the probe assembly according to the
following specifications.
Place the sensor end of the probe assembly:
•
in a location that represents the entire system
•
where the water flow 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 Teflon membrane
•
in a location that is free from debris (e.g. algae); ideally at a 45˚ angle from
vertical position and directed with the flow - figure 3.10
Installation and Wiring
Figure 3.10
•
in a well mixed, free-flowing 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 fluctuations 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, florescent lighting, ballasts,
pumps, any high voltage peripheral devices, etc.
CAUTION: run high and low voltage cabling through separate bulkhead fitting
and conduit
•
where regular maintenance, including calibration can easily be done.
Calibrations are performed using the 5200A front panel.
Note:
-
All YSI sensors, except the temperature sensor on the 5561 cable, are field re-
placeable. Individual sensors can be ordered and replaced by the user without
returning the probe/cable assembly to the factory.
YSI 5561 Probe Assembly
The YSI 5561 probe assembly includes a DO and temperature sensor. The 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.
Installation and Wiring
