Hach Sigma 950, Инструкция по эксплуатации инструмента

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Section 6 Sensor Installation
An individual Sigma 950 flow meter may have one or more of the following sensors:
6.1 Downlooking Ultrasonic Depth Sensor
6.1.1 Downlooking Ultrasonic Depth Sensor Connection
Note: Use a bare leads sensor
and junction box (P/N 3658) for conduit installation.
The Sigma 950 Flow Meter uses a 50 kHz or 75 kHz Downlooking Ultrasonic Depth
Sensor. The ultrasonic sensor receptacle is on the left side of the flow meter and labeled
Ultrasonic. The connector is keyed and can only be inserted key up.
Note: Cutting or splicing the sensor cable may cause instrument malfunction and void the warranty.
Remote Ultrasonic Connection
A Remote Ultrasonic factory-installed Option is available (P/N 3170) which allows for the
extension of the ultrasonic sensor cable (see
Figure 5 ).
6.1.2 Downlooking Ultrasonic Depth Sensor Programming
The downlooking ultrasonic depth sensor does not require specific programming, unless
more than one sensor option is connected to the meter. When more than one sensor
option is connected:
1. From the Main Menu, select OPTIONS>LEVEL SENSOR.
Select Ultra-Sonic using the
CHANGE CHOICE
soft key, then press the
ACCEPT
soft key.
• Downlook Ultrasonic Sensor • Submerged Pressure Area/Velocity
Sensor • Submerged Pressure Sensor
• In-Pipe Ultrasonic Sensor • Velocity-Only (Wafer) Sensor • Bubbler
• AV Bubbler
Table 11 Downlooking Ultrasonic Depth Sensor Connector Pin Assignments
Pin Signal Description Wire Color
A temperature (+) red
B temperature (-) black
C ultrasonic (+) shield
D ultrasonic (-) clear