Campbell CRS451 User manual

INSTRUCTION MANUAL
CRS451/CRS456 Submersible
Water-Level Recording Sensor
Revision: 1/14
Copyright © 2013-2014
Campbell Scientific, Inc.

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warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in
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manufacturer. Batteries, fine-wire thermocouples, desiccant, and other
consumables have no warranty. Campbell’s obligation under this warranty is
limited to repairing or replacing (at Campbell’s option) defective products,
which shall be the sole and exclusive remedy under this warranty. The
customer shall assume all costs of removing, reinstalling, and shipping
defective products to Campbell. Campbell will return such products by surface
carrier prepaid within the continental United States of America. To all other
locations, Campbell will return such products best way CIP (Port of Entry)
INCOTERM® 2010, prepaid. This warranty shall not apply to any products
which have been subjected to modification, misuse, neglect, improper service,
accidents of nature, or shipping damage. This warranty is in lieu of all other
warranties, expressed or implied. The warranty for installation services
performed by Campbell such as programming to customer specifications,
electrical connections to products manufactured by Campbell, and product
specific training, is part of Campbell’s product warranty. CAMPBELL
EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Campbell is not liable for any special, indirect,
incidental, and/or consequential damages.”

Assistance
Products may not be returned without prior authorization. The following
contact information is for US and international customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit
www.campbellsci.com to determine which Campbell Scientific company serves
your country.
To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an application engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container. Campbell
Scientific’s shipping address is:
CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784
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and Decontamination” form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to [e-mail] or faxed to
[phone]. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
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Table of Contents
PDF viewers: These page numbers refer to the printed version of this document. Use the
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1. Introduction .................................................................1
2. Cautionary Statements...............................................1
3. Initial Inspection and Handling Guidelines ..............1
3.1 Ships With............................................................................................2
4. Overview......................................................................2
5. Specifications .............................................................2
6. Installation...................................................................4
6.1 Appropriate Depth................................................................................4
6.2 Avoiding Freezing Conditions .............................................................5
6.3 Dislodge Bubbles .................................................................................5
6.4 Well Installation...................................................................................5
6.5 Other Installations ................................................................................6
6.6 Battery Voltage Reading ......................................................................6
6.7Attaching Suspension Cable to CRS451/CRS456 ...............................6
7. Programming ..............................................................8
7.1 Settings.................................................................................................8
7.2 Connect to the CRS451/CR456............................................................8
7.3 Configure CRS45X for Measurements ................................................9
7.4 Compensating Measurements for Barometric Pressure......................15
7.4.1 Using an Additional CRS45X.....................................................15
7.4.2 Using a Barometer ......................................................................15
8. Maintenance ..............................................................20
8.1 Every Visit .........................................................................................20
8.2 Every Two to Three Years or on a Rotating Schedule.......................20
8.3 Battery Replacement ..........................................................................21
9. Troubleshooting........................................................26
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Table of Contents
Appendices
A. Calibration Certificate.............................................A-1
B. Conversion to Units of Measurement ...................B-1
Table
B-1. Conversion Factors.......................................................................... B-1
ii

CRS451/CRS456 Submersible
Water-Level Recording Sensor
1. Introduction
The CRS451 consists of a water-level and water-temperature sensor that has its
own time clock and memory to store the collected data, in a compact stainless-
steel case. This frees users to place the sensor in remote sites and let it collect
data for long periods of time. The CRS451/CRS456 supports standard time-
based scanning and recording along with event-based recording based on water
level change (Delta) or logarithmic time sequence for pump and slug tests.
HydroSci software is included and supports test set up, data retrieval, and data
display.
The CRS451 has a 316L stainless-steel case that can be submerged in most
canals, wells, ponds, lakes, and streams. The CRS456 has a rugged titanium
case that allows it to be used in saltwater or other harsh environments.
Before using the CRS451/CRS456, please study:
•Section 2, Cautionary Statements
•Section 3, Initial Inspection
•Section 6, Installation
2. Cautionary Statements
•The CRS451/CRS456 will be damaged if encased in frozen liquid (see
Section 6.2, Avoiding Freezing Conditions, for more information).
•Although the CRS451/CRS456 is a rugged and reliable device, it is also a
highly precise scientific instrument and should be handled as such.
•Dropping the instrument or allowing it to “free fall” down a well may
damage the transducer.
•Confirm the compatibility of the instrument to non-water environments
before installation.
•The CRS456 should be used in harsh water applications, including salt
water.
3. Initial Inspection and Handling Guidelines
•Upon receipt of the CRS451/CRS456, inspect the packaging for any signs
of shipping damage. File damage claims with the shipping company.
•Immediately check package contents against the shipping documentation
(see Section 3.1, Ships With). Contact Campbell Scientific with any
discrepancies.
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CRS451/CRS456 Submersible Water-Level Recording Sensor
•The model number and pressure range are etched on the housing. Check
this information against the shipping documentation to ensure that the
expected product was received.
3.1 Ships With
•27555 USB 2.0 Cable Type A Male to Micro B Male, 6ft
•29225 HydroSci Software on CD
4. Overview
The CRS451/CRS456, Submersible Water-Level Recording Sensor, provides
reliable, accurate pressure/level measurements that are fully temperature
compensated.
The 24 bit A/D has simultaneous 50/60 Hz rejection and automatic calibration
for each measurement. A number of additional advanced measurement
techniques are employed to harness the best possible performance available
from today’s state of the art pressure sensor technology. The CRS451/CRS456
reverts to a low power sleep state between measurements. A series of
measurements are performed yielding a temperature and pressure value. This
measurement cycle can be as fast as 1 second.
The design features a piezoresistive sensor housed in a 316L stainless steel
(CRS451) or titanium (CRS456) package to enhance reliability. The rugged
construction makes the CRS451/CRS456 suitable for water level measurement
in irrigation applications, water wells, lakes, streams, and tanks. The titanium
package of the CRS456 makes it ideal for salt water or other harsh
environments.
The CRS451/CRS456 has three nose cone options. The weighted nose cone
makes the transducer easier to submerge to depth. The NPT option allows the
sensor to be mounted to a 1/4 inch fitting. The nose cones can be exchanged at
a later time.
Communicating with the CRS451/CRS456 requires a micro USB cable and
HydroSci software running on a computer with Windows XP or later.
Configurable settings can be changed using Campbell Scientific’s HydroSci
software utility.
5. Specifications
Features:
•Field replaceable batteries
•Campbell Scientific quality
•No additional datalogger, enclosure, and power supply; reduces
system costs and simplifies installation
•Free customer-friendly software for communication, configuration,
data collection
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CRS451/CRS456 Submersible Water-Level Recording Sensor
•Fast scan rate
•Large data storage capacity
•High accuracy
•Long battery life
•Data retrieval through sealed USB connector
Measurement Time: < 1 s typical
Output: micro USB
Internal Data
Collection Memory: 4 MB
HydroSci Supported
Operating Systems: Windows XP, Windows Vista, or Windows 7
Logging/Scanning Modes: Standard, Delta, Logarithmic
Power Requirements: Internal user-replaceable lithium battery
Battery Life: 5+ years when logging interval is once per
hour
Power Consumption
Quiescent Current: < 80 μA
Measurement/
Communication Current: 4 mA for 1 s measurement
Measurement Ranges1:
Pressure
(psig)
Pressure
(kPa)
Meters of
fresh water
Feet of
fresh water
0 to 7.25
0 to 50
0 to 5.1
0 to 16.7
0 to 14.5
0 to 100
0 to 10.2
0 to 33.4
0 to 29
0 to 200
0 to 20.4
0 to 67
0 to 72.5
0 to 500
0 to 50.9
0 to 167
0 to 145
0 to 1000
0 to 102
0 to 334.5
Accuracy
Pressure Reading2:0.1% full-scale range TEB3
Temperature: ±0.2°C
Resolution: 0.0035% full-scale range
Overpressure: 2x pressure range
Dry Storage Temperature: –30° to 80°C
Operating Temperature: 0° to 60°C
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CRS451/CRS456 Submersible Water-Level Recording Sensor
Freezing conditions may damage the CRS451/CRS456
(see Section 6.2, Avoiding Freezing Conditions, for more
information).
Body Material
CRS451: 316L Stainless Steel
CRS456: Titanium
Element Material
CRS451: 316L Stainless Steel
CRS456: Hastelloy®
Standard Cone Material: Delrin®
Weighted and NPT Material: Stainless Steel
Dimensions
Length: 22.23 cm (8.75 in)
Diameter: 2.22 cm (0.875 in)
Weight: 230 g (0.51 lb)
1The CRS451 is a sealed gage sensor and when not submerged will read
approximately 1 bar at sea level and less as elevation increases. The CRS451
is calibrated at 9 pressures starting at 0.6 bar up to full scale referenced to 1
bar. Points below 1 bar are used in the calibration for the benefit of those who
deploy this sensor at elevations above sea level.
2The accuracy specification listed pertains to the level of accuracy that the
CRS451/CRS456 is able to measure pressure. If a barometric pressure sensor
is used to remove the component of atmospheric pressure from the pressure
reading provided by the CRS451/CRS456 while submerged in a column of
water vented to the atmosphere, the error of the barometric sensor must be
considered when calculating the resulting accuracy of the water level reading.
3Total Error Band (TEB) includes the combined errors due to nonlinearity,
hysteresis, nonrepeatability, and thermal effects over the compensated
temperature range, per ISA S51.1.
6. Installation
The CRS451/CRS456 is designed for water level measurements. Typical
applications include agricultural water level/flow, water wells, lakes, streams,
and tanks. If the device is to be installed in a liquid other than water or in
contaminated water, check the compatibility of the wetted material. The
CRS456 should be used in harsh water applications, including salt water.
6.1 Appropriate Depth
The CRS451/CRS456 must be installed below the water at a fixed depth. This
depth should be chosen so that the water pressure will never exceed the
transducer’s pressure range (twice its pressure rating).
CAUTION
4