2.1 ULTRASONIC LEVEL TRANSMITTERS - FOR LEVEL MEASUREMENT

A. Operating Principle: Microprocessor-based, echo-time measurement utilizing a transmitter which emits ultrasonic pulses and receives echoes reflected back from liquid surface

B. Manufacturers

Rosemount 3100 Series Transmitters with optional 3490 Universal Control Unit

Siemens Hydro Ranger Transmitter with XPS-15 Transducer

C. Specifications

1. Measuring Range: 1 to 30 ft (0.3 to 12 metres).

2. Accuracy: 0.25% measured distance or better

3. Signal Output: 4-20 mA configurable for either level or volume

4. Temperature Rating: -40 to 140 deg F

5. Ingress Protection: rated for accidental submersion to 30 feet

6. Hazardous Location Approval: FM for Class I, Division I, Groups A, B, C, D

7. Wetted Materials: Resistant to corrosion and chemicals (e.g. UPVC, Kynar®)

D. Features

1. Integral temperature sensor to compensate for changes in speed of sound

2. Integral manufacturer’s cable

3. Included mounting bracket for suspended installations

4. Integral NPT threads for fixed-mount installations

5. Configurable via keypad programming tool, integral buttons, or with manufacturer’s asset management software

6. Onboard Level to Volume conversion using standard geometric profiles or look-up table

E. Manufacturer-supplied options depending on application requirements

1. Plastic NPT to ANSI-style adapter flanges

2. External temperature input for improved speed of sound compensation where the transmitter will be mounted in full sun

3. Head-verification assembly for in-situ calibration verification

4. Submersion-shield

5. Local Display

6. Hi/Lo Alarm and/or fault annunciation

a. 2 or more integral relays, minimum rated 2 A @ 30 VDC for resistive loads

7. Pump Control

a. 5 or more integral relays, minimum rated 5 A @ 240 VAC

b. Onboard special control functions such as stand-by and sequential pumping, pump run-time, efficiency calculations, scum-line prevention

c. 2 or more discrete inputs