Campbell SnowVUE 10 Bedienungsanleitung

10/2021

Campbell Scientific, Inc.

Table of contents

1. Introduction 1

2. Precautions 1

3. Initial inspection 1

4. QuickStart 1

5. Overview 5

6. Specifications 6

7. Installation 7

7.1 Wiring 7

7.2 Programming 8

7.2.1 CRBasic programming 9

7.3 Beam angle 9

7.4 Mounting height 10

7.4.1 Reference point 10

7.5 Mounting 11

8. Operation 13

8.1 Quality numbers 14

8.2 Pitch, roll, and tilt axis 14

8.3 Temperature compensation 15

8.4 SDI-12 measurements 16

9. Maintenance and troubleshooting 19

9.1 Disassembly/assembly procedures 19

9.2 Data interpretation 21

9.3 Data filtering 21

Appendix A. Importing Short Cut code into CRBasic Editor 23

Table of Contents - i

1. Introduction

The SnowVUE™10 sonic ranging sensor provides a non-contact method for measuring snow

depth. The sensor emits an ultrasonic pulse, measures the elapsed time between the emission

and return of the pulse, then uses this measurement to determine snow depth. An air

temperature measurement is required to correct for variations of the speed of sound in air.

2. Precautions

lREAD AND UNDERSTAND the Safety section at the back of this manual.

lNever open the sensor while it is connected to power or any other device.

lAlways disconnect the sensor using the connector or disconnect the cable wires from their

termination points.

lFollow local regulations (see Compliance in Specifications (p. 6)).

3. Initial inspection

Upon receipt of the sensor, inspect the packaging for any signs of shipping damage and, if

found, report the damage to the carrier in accordance with policy. The contents of the package

should also be inspected and a claim filed if any shipping related damage is discovered.

4. QuickStart

A video that describes data logger programming using Short Cut is available at:

www.campbellsci.com/videos/cr1000x-data logger-getting-started-program-part-3 .Short

Cut is an easy way to program your data logger to measure the sensor and assign data logger

wiring terminals. Short Cut is available as a download on www.campbellsci.com . It is included

in installations of LoggerNet,RTDAQ, and PC400.

1. Open Short Cut and click Create New Program.

2. Double-click the data logger model.

SnowVUE 10 Sonic Ranging Sensor 1

NOTE:

A reference temperature measurement is required for accurate readings. This example uses

the 109 Temperature Probe.

3. In the Available Sensors and Devices box, type 109 or find the 109 in the Sensors >

Temperature folder. Double click the 109 Temperature Probe. Use the default of Deg C.

4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after

wiring the sensor.

SnowVUE 10 Sonic Ranging Sensor 2

5. In the Available Sensors and Devices box, type SnowVUE 10. You can also find the sensor in

the Sensors >Miscellaneous Sensors folder. Double-click the SnowVUE10 Digital Snow

Depth Sensor. Type the Distance to base, which is the distance from the wire mesh face to

the ground; this value should be in the same units as the Units of measure. The default for

Units of measure is m; this can be changed by clicking the Units of measure box and

selecting another value. SDI-12 Address defaults to 0. Type the correct SDI-12 Address if it

has been changed from the factory-set default value. Click the Air temperature (Deg C)

reference box and select the reference temperature variable (T109_C).

SnowVUE 10 Sonic Ranging Sensor 3

6. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after

wiring the sensor.

7. Repeat steps five and six for other sensors. Click Next.

8. In Output Setup, type the scan rate, meaningful table names, and Data Output Storage

Interval. Click Next. For this sensor, Campbell Scientific recommends measurement scans of

15 seconds or more.

SnowVUE 10 Sonic Ranging Sensor 4

9. Select the output options.

10. Click Finish and save the program. Send the program to the data logger if the data logger

is connected to the computer.

11. If the sensor is connected to the data logger, check the output of the sensor in the data

display in LoggerNet,RTDAQ, or PC400 to make sure it is making reasonable

measurements.

5. Overview

The SnowVUE 10 measures the distance from the sensor to a target. It determines the distance to

a target by sending ultrasonic pulses (50 kHz) and listening for the returning echoes that are

reflected from the target. The time from pulse transmission to return of the echo is the basis for

obtaining the distance measurement. The SnowVUE 10 is designed for extreme cold and

corrosive environments, making it well suited for a wide range of applications.

Since the speed of sound in air varies with temperature, an independent temperature

measurement is required to compensate the distance reading. The SnowVUE 10 requires an

external temperature sensor, such as the 109, to provide the measurement.

The SnowVUE 10 meets the stringent requirements of snow depth measurement making it well

suited for a variety of applications. The SnowVUE 10 has a type III anodized aluminum chassis

with a rugged transducer that withstands many environments.

SnowVUE 10 Sonic Ranging Sensor 5

FIGURE 5-1. The anodized chassis protects the SnowVUE 10.

Features:

lWide operating temperature range

lUses a multiple echo processing algorithm to help ensure measurement reliability

lCan output a data value indicative of measurement quality (Quality numbers (p. 14))

lCompatible with Campbell Scientific CRBasic data loggers: GRANITE series, CR6, CR1000X,

CR800 series, CR300 series, CR3000, and CR1000

6. Specifications

Powerrequirements: 9 to 18 VDC

Quiescentcurrent consumption: < 300 µA

Activecurrent consumption: 210 mA peak, 14 mA average @ 20 °C

Measurement time: 5 s typical, 20 s maximum

Output: SDI-12 (version 1.4)

Measurement range: 0.4 to 10 m (1.3 to 32.8 ft)

Accuracy: 0.2% of distance to target

Accuracy specification excludes errors in the temperature

compensation. An external temperature compensation is

required.

Resolution: 0.1 mm

SnowVUE 10 Sonic Ranging Sensor 6

Requiredbeamangleclearance: 30 °

Operatingtemperaturerange: –45 to 50 °C

Sensor connector type: M12, male, 5-pole, A-coded

Maximum cable length: 60 m (197 ft)

Cable type: 3 conductor, polyurethane sheathed, screened cable,

nominal diameter 4.8 mm (0.19 in)

Chassis types: Corrosion-resistant, type III anodized aluminum

Sensor length: 9.9 cm (3.9 in)

Sensor diameter: 7.6 cm (3 in)

Sensor weight (no cable): 293 g (10.3 oz) without cable

Cable weight (15 ft): 250 g (8.2 oz)

IP rating

Electrical housing:

Transducer:

IP67

IP64

Compliance: This device complies with Part 15 of the USA Federal

Communications Commission (FCC) Rules. Operation in the

USA is subject to the following two conditions:

1. This device may not cause harmful interference.

2. This device must accept any interference received,

including interference that may cause undesired

operation.

Compliance documents: View at www.campbellsci.com/snowvue10

7. Installation

If you are programming your data logger with Short Cut, skip Wiring (p. 7) and Programming (p.

8). Short Cut does this work for you. See QuickStart (p. 1) for a Short Cut tutorial.

7.1 Wiring

The following table provides wiring information for the SnowVUE 10.

SnowVUE 10 Sonic Ranging Sensor 7

CAUTION:

Power down your system before wiring the sensor. Never operate the sensor with the shield

wire disconnected. The shield wire plays an important role in noise emissions and

susceptibility as well as transient protection.

Table 7-1: Wire color, function, and data logger connection

Wire color Wire function Data logger connection terminal

Black Powerground G

Brown Power 12V

White SDI-12signal C1,SDI-12, or Uconfigured for SDI-121

Clear Shield G

1Cand Uterminals are automatically configured by the measurement instruction.

To use more than one sensor per data logger, either connect the different sensors to different

terminals on the data logger or change the SDI-12 addresses such that each sensor has a unique

SDI-12 address. Using unique SDI-12 addresses reduces the number of terminals used on the

data logger and allows sensors to be connected in a daisy-chain that can minimize cable runs in

some applications.

For the GRANITE-series, CR6, and CR1000X data loggers, triggering conflicts may occur when a

companion terminal is used for a triggering instruction such as TimerInput(),PulseCount(),

or WaitDigTrig(). For example, if the SnowVUE 10 is connected to C3 on a CR1000X, C4

cannot be used in the TimerInput(),PulseCount(), or WaitDigTrig() instructions.

Regardless of the data logger, if enough terminals are available, avoid using the companion

terminal for another device.

7.2 Programming

Short Cut is the best source for up-to-date programming code for Campbell Scientific data

loggers. If your data acquisition requirements are simple, you can probably create and maintain a

data logger program exclusively with Short Cut. If your data acquisition needs are more complex,

the files that Short Cut creates are a great source for programming code to start a new program

or add to an existing custom program.

NOTE:

Short Cut cannot edit programs after they are imported and edited in CRBasic Editor.

SnowVUE 10 Sonic Ranging Sensor 8

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