OBS501 Smart Turbidity Meter with ClearSensor
®
Technology
20
FIGURE 8-1. Orientation of emitter cone (source beam) and OBS and
sidescatter detector (acceptance) cones
The beam divergence angle of the VCSEL source is 4° worst case and 2°
typical
(95% of the beam power is contained within a 5°
cone).
8.3 OBS500CBL-L Connector Pin Out
The OBS500CBL-L Field Cable terminates with an MCIL wet pluggable
underwater terminator. TABLE
, shows the contact numbers for the
MCIL/MCBH-8 connectors and the electrical functions and wire colors.
TABLE 8-1. OBS500CBL-L Connector Pin-Out
MCIL-8-MP/MCBH-8-FS
Contact Number
Electrical Function
Wire Color
1
Power Ground
Black
2
SDI-12/RS-232 TX/Analog
SS-BS Control
White
3
Power (9.6 to 15 V)
Red
4
Analog Signal
Green
5
RS-232 RX/Shutter Open
Blue
6
NC
7
Analog Ground
Brown
8
NC
No Connection
Clear/Braid
8.4 Measurements
The OBS501 design combines the sensor, analog measurement, and signal
processing within a single housing resulting in the integration of state-of-the-
art sensor and measurement technology. The 24-bit A/D has simultaneous
50/60 Hz rejection and automatic calibration for each measurement. A number
of additional advanced measurement techniques are employed to harness the
Emitter Cone
OBS Detector
Cone
90° Sidescatter
Detector Cone
