Hach Sigma 950, Инструкция по эксплуатации инструмента, Страница: 40 / 146

38
Sensor Installation
Figure 6 Side View of In-Pipe
1. From the Main Menu, select
OPTIONS>ADVANCED OPTIONS> CALIBRATION>
ULTRASONIC SENSOR.
2. Select the Invisible Range option using the
UP
and
DOWN
soft keys. Press
SELECT
to
continue.
3. Enter the Distance to End of the Invisible Range using the keypad.
4. Select either inches or centimeters using the
CHANGE UNITS
soft key. Press
ACCEPT
when finished.
6.3 Submerged Area/Velocity Sensor
Submerged Area/Velocity sensors can measure level and velocity simultaneously.
6.3.1 Bare Lead Sensor Cables
Bare lead sensor cables are used in those cases where the cable will be run through a
conduit. When conduit is used, it is recommended that the conduit be 1-inch or larger.
6.3.2 Junction Box Connection Procedure
Connect the bare leads to the flow meter using a junction box (P/N 4730). This junction
box is a physical connection point for the sensor wires and breather tubing.
Refer to Figure 7 for the following procedure.
1. Remove the four cover screws, cover, and cover gasket from the junction box.
Unscrew the cable-clamp hex nut on the box enough to allow insertion of the sensor
cable.
2. Insert the sensor cable into the box and make connections. Refer to the wiring
diagram on the inside cover of the box, connect each wire to its corresponding
terminal screw, observing the wire colors listed in that diagram. See
Table 13 .
1 Minimum distance to reflecting obstruction (2 m (82 in.)) 4 Ultrasonic Sensor
2 Distance from Sensor (Range: 0 to 4.08 m (13.4 ft)) 5 Internal Deadband (18 cm (7.09 in.))
3 45° Deflector