Hach 900 MAX manual 4.2Submerged Area/Velocity Sensor, Submerged Area/Velocity Sensor Connection

Section 4

4.Select either inches or centimeters using the CHANGE UNITS key. The distance must be greater than the minimum deadband of 10 in. (25.4 cm) for the 75 kHz sensor and 15 in. (38.1 cm) for the 50 kHz sensor.

5.Press ACCEPT when finished.

4.2Submerged Area/Velocity Sensor

The Submerged area/velocity sensor simultaneously measures level and velocity.

4.2.1 Submerged Area/Velocity Sensor Connection

Table 5 Submerged/Area Velocity Sensor Connection

Pin	Signal Description	Wire Color	Bare Leads
A	+12 V dc	Red	Red
B	ground	Green	Green
C	Receive (ground)	B/W Shield	Yellow
D	Receive (+)	B/W Center	Orange
E	Transmit (ground)	Black Shield	Violet
F	Transmit (+)	Black Center	Gray
G	Depth (-)	Black	Black
H	Depth (+)	White	White

Recommended Routing of Submerged Area/Velocity Cable

Proper routing of the cable serves two functions:

•Keeps the in-line desiccant assembly inside the cover and out of the way when installing and removing the sampler from tight manholes.

•Keeps the desiccant out of direct contact with the elements. Also, keeps water from dripping directly onto the desiccant assembly.

To secure the submerged area velocity cable, route the cable around the battery and clip it under the battery hold downs.

4.2.2Submerged Area/Velocity Sensor Programming

1.From the Main Menu, select OPTIONS>LEVEL SENSOR.

2.Select Submerged Xducer using the CHANGE CHOICE key. Press

ACCEPT.

3.From the MAIN MENU, select SETUP>MODIFY SELECTED ITEMS.

4.Highlight Velocity Direction using the UP and DOWN keys. Press SELECT.

5.Set the velocity direction (upstream, downstream, or always positive) using the CHANGE CHOICE key. Press ACCEPT to continue.

6.Highlight Velocity Units using the UP and DOWN keys. Press SELECT.

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8990sensors.fm	Submerged Area/Velocity Sensor