Low Profile Velocity-Only (Wafer) Sensor Connection; Low Profile Velocity-Only Sensor Programming; Low Profile Velocity-Only Sensor Calibration; Submerged Depth Only Sensor - Hach Sigma 950 Instrument Manual

6.4.1 Low Profile Velocity-Only (Wafer) Sensor Connection

Table 14 Submerged Velocity Sensor Connector Pin Assignments
Pin
A
B
C
D
E
F

6.4.2 Low Profile Velocity-Only Sensor Programming

6.4.3 Low Profile Velocity-Only Sensor Calibration

6.5 Submerged Depth Only Sensor

sensor. The streamlined shape of the velocity-only sensor allows velocity measurement
in very low-flow conditions. When used in conjunction with a level sensor, the meter can
calculate flow.
Note: Use bare-lead sensor and junction box for conduit installation.
The low profile velocity-only sensor connector is located on the right side of the flow meter
(when facing the flow meter) and is labeled Velocity. The connector is keyed and can only
be inserted in the proper orientation (key up). See
Signal Description
+12 V dc
ground
receive (shield)
receive (+)
transmit (shield)
transmit (+)
1. From the
MAIN MENU
2. Highlight Velocity Direction using the
continue.
3. Set the velocity direction (upstream, downstream, or always positive) using the
soft key.
CHANGE CHOICE
4. Press to continue.
ACCEPT
5. Highlight Velocity Units using the
6. Set the Velocity Units (fps or m/s), using the
to continue.
7. Highlight Velocity Cutoff, using the
continue.
8. Read the Velocity Cutoff information screen. Press any key to continue.
9. Set the Velocity Cutoff using the keypad. Press
10. Set the Velocity Default, using the numeric keypad. Press
go back to the Setup Menu or the Main Menu key to return to the beginning.
No calibration is required for the velocity sensor. The transmit frequency is fixed with a
highly accurate quartz crystal-controlled frequency generator that cannot be adjusted.
The submerged depth only pressure sensor is a pressure transducer that contains a
titanium diaphragm. As the water pressure increases, (with increasing level in the flow
stream) the diaphragm is deflected, or pushed, against a solid state device called a strain
gauge. The strain gauge converts the pressure against the diaphragm to a voltage. As
the level in the flow stream increases, the voltage coming from the submerged pressure
, select
SETUP>MODIFY SELECTED ITEMS.
and
UP DOWN
and
UP DOWN
UP
and
UP DOWN
Sensor Installation
Table 14 for pin assignments.
Wire Color
red
green
b/w shield
b/w center
black shield
black center
soft keys. Press
SELECT
soft keys. Press
SELECT
and soft keys. Press
DOWN
soft keys. Press
SELECT
.
ACCEPT
. Press
ACCEPT
to
to continue.
ACCEPT
to
to
RETURN
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