Campbell CS511-L User manual

CS511-L Dissolved
Oxygen Probe
Revision: 1/13
Copyright © 2001-2013
Campbell Scientific, Inc.

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Table of Contents
PDF viewers: These page numbers refer to the printed version of this document. Use the
PDF reader bookmarks tab for links to specific sections.
1. Introduction.................................................................1
2. Cautionary Statements...............................................2
3. Initial Inspection .........................................................2
3.1 Shipping Kit and Accessories ..............................................................2
3.1.1 Shipping Kit..................................................................................2
3.1.2 Optional Probe Accessories ..........................................................2
4. Quickstart ....................................................................3
4.1 Getting Probe Ready to Use.................................................................3
4.2 Use SCWin to Program Datalogger and Generate Wiring Diagram ....5
4.3 Mount Probe.........................................................................................8
5. Overview......................................................................8
6. Specifications .............................................................9
7. Operation...................................................................11
7.1 Wiring ................................................................................................11
7.2 Programming......................................................................................11
7.2.1 CRBasic ......................................................................................11
7.2.1.1 Example CR1000 Program Using VoltDiff......................12
7.2.1.2 Example CR200(X) Program ...........................................13
7.2.2 Edlog...........................................................................................14
7.2.2.1 Portion of CR10X Sample Program Using P1 .................14
7.2.2.2 Portion of CR10X Sample Program Using P2 .................14
7.3 Calibration..........................................................................................14
8. Maintenance ..............................................................16
8.1 Cleaning Probe and Replacing the Membrane ...................................16
Appendices
A. Dissolved Oxygen Tables ...................................... A-1
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Table of Contents
ii
B. Sensorex’s Model DO6200/T ..................................B-1
B.1 DO6200/T Specifications ................................................................ B-1
B.2 Accessories for DO6200/T .............................................................. B-2
C. PT4-L Agitator .........................................................C-1
C.1 Description ...................................................................................... C-1
C.2 PT4-L Specifications....................................................................... C-2
C.3 Agitator Control .............................................................................. C-2
Figures
1-1. The CS511-L is currently Sensorex’s DO6400/T (left). The
DO6200/T (right) was shipped prior to June 2008 (refer to
Appendix B)..................................................................................... 1
8-1. Separate the lower body from the upper body................................... 16
8-2. Remove membrane and O-ring.......................................................... 17
8-3. Using a toothbrush to clean probe ..................................................... 18
8-4. Proper O-ring placement ................................................................... 19
8-5. Installing membrane .......................................................................... 20
8-6. Check for leakage.............................................................................. 21
B-1. Sensorex’s model DO6200/T .......................................................... B-1
C-1. Preventing Bio-fouling of a DO Sensor........................................... C-1
C-2. DO sensor with PT4 Agitator .......................................................... C-2
C-3. Agitator Wiring ............................................................................... C-3
Tables
7-1. Sensor Wiring.................................................................................... 11
7-2. Wiring for Example 1........................................................................ 12
7-3. Wiring for Example 2........................................................................ 13

CS511-L Dissolved Oxygen Probe
1. Introduction
The CS511 is a rugged, low-maintenance sensor that is manufactured by
Sensorex. It consists of a self-polarizing galvanic cell that generates a millivolt
signal proportional to the amount of oxygen present in the measured medium
(typically water).
Before installing the CS511, please study
•Section 2, Cautionary Statements
•Section 3, Initial Inspection
•Section 3.1, Quickstart
Currently, the CS511 is Sensorex’s Model DO6400/T. Prior to
June 2008, the CS511 was Sensorex’s Model DO6200/T.
Programming, wiring, and most specifications are the same for
these two sensors. However, they use different accessories and
look different (see FIGURE 1-1). Refer to Appendix B if you
have Sensorex’s Model DO6200/T.
NOTE
DO6200/T
DO6400/T
FIGURE 1-1. The CS511-L is currently Sensorex’s DO6400/T (left).
The DO6200/T (right) was shipped prior to June 2008 (refer to
Appendix B).
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CS511-L Dissolved Oxygen Probe
2. Cautionary Statements
•The CS511 is a precision instrument. Please handle it with care.
•Because the CS511 is shipped dry, electrolyte needs to be added before
using the probe (see Section 4.1, Getting Probe Ready to Use).
•Letting the CS511 dry up shortens the life of the membrane and probe.
•Drain the solution from the CS511 before storing it out of water.
•Replace the membrane and recalibrate the probe before redeploying the
CS511 after it has been stored out of water or dried up in the field.
3. Initial Inspection
•Upon receipt of the CS511, inspect the packaging and contents for
damage. File damage claims with the shipping company.
•Immediately check package contents against the shipping documentation
(see Section 3.1, Shipping Kit and Accessories). Contact Campbell
Scientific about any discrepancies.
•The model number and cable length are printed on a label at the
connection end of the cable. Check this information against the shipping
documents to ensure the expected product and cable length are received.
3.1 Shipping Kit and Accessories
Except for the agitator, these items are for Sensorex’s
DO6400/T. Refer to Appendix B if you have a DO6200/T.
NOTE
3.1.1 Shipping Kit
(1) Membrane replacement tool
(1) Bottled DO electrolyte, 250 ml
(2) Teflon membranes
(2) Membrane O-rings
(2) Membrane spaces
3.1.2 Optional Probe Accessories
•PT4─L Agitator with Repeat Cycle Timer for stagnant conditions (see
Appendix C)
•22261 Maintenance Kit containing (5) Teflon membranes, (5) membrane
O-rings, (5) tensioning washers, and a 250-ml bottle of electrolyte
•22262 Maintenance Kit containing (25) Teflon membranes, (25) membrane
O-rings, (25) tensioning washers, and a 500-ml bottle of electrolyte
•22263 Spare Parts Kit containing (2) membrane locks, (2) tensioning
washers, (2) body O-rings, and (1) membrane-replacement tool
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CS511-L Dissolved Oxygen Probe
4. Quickstart
Please review Section 7, Operation, for wiring, programming, and calibration
information.
4.1 Getting Probe Ready to Use
1. Unscrew the lower body from the upper body.
2. Inspect the membrane for wrinkles. Replace membrane if wrinkled (see
Section 8.1, Cleaning Probe and Replacing the Membrane).
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CS511-L Dissolved Oxygen Probe
3. Pour clean water into the lower body and look for leakage around the
membrane. Dispose of the water, and if there is leakage, replace
membrane (see Section 8.1, Cleaning Probe and Replacing the
Membrane).
Water
4. Pour fresh electrolyte in the bottom cap and fill to the top of the cap.
5. Keep the probe upright with the cable pointed upwards (not sideways).
Screw the bottom cap onto the upper body until hand tight.
Excess electrolyte will leak out at the joint between the probe’s
cap and upper body.
NOTE
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CS511-L Dissolved Oxygen Probe
4.2 Use SCWin to Program Datalogger and Generate Wiring
Diagram
The simplest method for programming the datalogger to measure the 034B is to
use Campbell Scientific’s SCWin Program Generator.
1. Open Short Cut and click on New Program.
2. Select the datalogger and enter the scan interval.
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CS511-L Dissolved Oxygen Probe
3. Select CS511 Dissolved Oxygen Probe, and select the right arrow (in
center of screen) to add it to the list of sensors to be measured, and then
select Next.
4. Define the name of the public variables and enter the calibration
multiplier. Variables default to DOmv for the millivolt measurements and
DOppm for the ppm values. The default calibration value of 0.34 is based
on an average. It is preferable to calibrate the probe using the procedure
provided in Section 7.3, Calibration. After entering the information, click
on OK, and then select Next.
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CS511-L Dissolved Oxygen Probe
5. Choose the outputs and then select Finish.
6. In the Save As window, enter an appropriate file name and select Save.
7. In the Confirm window, click Yes to download the program to the
datalogger.
8. Click on Wiring Diagram and wire according to the wiring diagram
generated by SCWin Short Cut.
Campbell Scientific also recommends connecting the shield wire
to ground.
NOTE
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CS511-L Dissolved Oxygen Probe
4.3 Mount Probe
Mount the CS511 in water at a slight angle, which prevents bubbles from
becoming trapped on the membrane.
5. Overview
The CS511 is a galvanic probe which produces a millivolt signal proportional
to the amount of oxygen present in the measured medium. Oxygen diffuses
through the membrane onto the cathode, reacts chemically, and combines with
the anode. An electrical current is produced by this chemical reaction which is
converted from microamps to millivolts by an in-line resistor. An in-line
thermistor also conditions the signal providing automatic temperature
compensation. With these features, the probe produces a linear, millivolt
output proportional to the oxygen present in the medium in which it is placed.
The probe consists of two parts, an upper part with cathode, anode, and cable,
and a lower part comprising of a screw-on membrane cap. The probe is
shipped dry, but has a membrane installed in the cap. With the membrane in
place, the cap must be filled with electrolyte solution before the cap is screwed
onto the top component.
The probe is self-polarizing and requires no external power source.
The probe's robust construction and simple design make maintenance and
servicing it straightforward. There is no need to send the probe back to the
factory for servicing. It uses a strong, easy-to-clean, and easy-to-change
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CS511-L Dissolved Oxygen Probe
membrane in a screw-on membrane cap. Regular servicing is not required.
When necessary, the probe can be fully overhauled in five min.
The CS511’s cable can terminate in:
•Pigtails that connect directly to a Campbell Scientific datalogger
(option –PT).
•Connector that attaches to a prewired enclosure (option –PW). Refer
to www.campbellsci.com/prewired-enclosures for more information.
•Connector that attaches to a CWS900 Wireless Sensor Interface
(option –CWS). The CWS900 allows the probe to be used in a
wireless sensor network. Refer to www.campbellsci.com/cws900 for
more information.
6. Specifications
Features:
•In-line thermistor provides automatic temperature compensation
•Agitator available that keeps the probe clean and moves water across
membrane for more accurate readings
•Compatible with all Campbell Scientific dataloggers
Compatible Dataloggers: CR200(X)-series
CR800 series
CR1000
CR3000
CR5000
CR9000X
CR510
CR10(X)
CR23X
CR7
21X
Principle of Measurement: Membrane-covered, galvanic oxygen probe
Output Signal: 33 mV ±9 mV (100% saturation),
< 2 mV (0% saturation)
Accuracy: Better than ±2% of reading ±1 digit when
calibration temperature equals measuring
temperature ±5°C
Response Time: 5 min. from 100% to 0% oxygen
Materials of Construction:
Body:
Anode:
Cathode:
Noryl
Silver
Zinc
Diameter: 5.72 cm (2.25 in)
Height: 17.78 cm (7 in) from bottom of sensor to end
of cable-strain relief
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CS511-L Dissolved Oxygen Probe
Shipping Weight 0.8 kg (1.75 lb)
Cable Jacket Material: PVC
Operating Conditions:
Temperature
Pressure:
Minimum Submersion Depth:
Minimum Water Flow:
0° to 50°C (32° to 122°F)
0 to 100 psig
60 mm (2.5 in)
5 cm/s (2 in/sec) across membrane
Calibration: In air or in air saturated water
Temperature Compensation: Automatic from 4° to 40°C (40° to 104°F)
Range of Dissolved Oxygen: 0.5 to 50 ppm
Probe Electrolyte: NaCl + glycerol (prevents freezing)
2.25”
(57.2mm)
7.00"
(177.8mm)
0.99”
(25.1mm)
red wire (+) black wire (-)
black waterproof
cable (10ft length standard)
flexible cable
strain relief
Noryl Body
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CS511-L Dissolved Oxygen Probe
7. Operation
7.1 Wiring
The CS511 can use one differential channel or one single-ended channel.
Differential wiring is better at rejecting electrical noise and ground loop error.
TABLE 7-1. Sensor Wiring
Color
Function
CR510, CR10X, CR800,
CR850, CR23X, CR1000,
CR3000, CR5000
CR200(X)-Series
White Signal + Differential High,
or Single-Ended Channel
Single-Ended Channel
Black Signal - Differential Low or AG Ground
Clear Shield Ground Ground
7.2 Programming
This section describes using CRBasic or Edlog to program the
datalogger. See Section 4.2, Use SCWin to Program Datalogger
and Generate Wiring Diagram, if using Short Cut.
NOTE
Dataloggers that use CRBasic include the CR200(X)-series, CR800, CR850,
CR1000, CR3000, and CR5000. Dataloggers that use Edlog include the
CR510, CR10X, and CR23X. CRBasic and Edlog are included with
LoggerNet and PC400 software.
7.2.1 CRBasic
In the CR800, CR850, CR1000, CR3000, and CR5000, VoltDiff() or VoltSE()
can be used to measure the CS511. In the CR200(X)-series dataloggers, only
the VoltSE() instruction can be used since these dataloggers do not support
differential measurements. Example programs are provided in Section 7.2.1.1,
Example CR1000 Program Using VoltDiff, and Section 7.2.1.2, Example
CR200(X) Program.
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CS511-L Dissolved Oxygen Probe
7.2.1.1 Example CR1000 Program Using VoltDiff
This example is a CR1000 program but programming for the CR800, CR850,
CR3000, and CR5000 is similar. TABLE 7-2 shows the wiring for the
example.
TABLE 7-2. Wiring for CR1000 Example
CR1000 Connection Sensor Wire
1H White
1L Black
Ground Clear
'CR1000
'Declare Variables and Units
Public Batt_Volt
Public DOmV
Public DOppm
Units Batt_Volt=Volts
Units DOmV=mV
Units DOppm=ppm
'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min,10)
Sample(1,DOmV,FP2)
Sample(1,DOppm,FP2)
Sample(1,Batt_Volt,FP2)
EndTable
DataTable(Table2,True,-1)
DataInterval(0,1440,Min,10)
Minimum(1,Batt_Volt,FP2,False,False)
EndTable
'Main Program
BeginProg
Scan(5,Sec,1,0)
'Default Datalogger Battery Voltage measurement Batt_Volt:
Battery(Batt_Volt)
'CS511 Dissolved Oxygen Probe measurements DOmV and DOppm:
VoltDiff(DOmV,1,mV250,1,True,0,_60Hz,1,0)
DOppm=DOmV*0.34
'Call Data Tables and Store Data
CallTable(Table1)
CallTable(Table2)
NextScan
EndProg
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CS511-L Dissolved Oxygen Probe
7.2.1.2 Example CR200(X) Program
The CR200(X)-series must use the VoltSE() instruction since these dataloggers
do not make differential measurements. If the other CRBasic dataloggers use
the VoltSE() instruction instead of the VoltDiff() instruction, their
programming will be similar to this example. TABLE 7-3 shows the wiring for
the example.
TABLE 7-3. Wiring for CR200(X) Example
CR200(X) Connection Sensor Wire
SE1 White
Ground Black
Ground Clear
'CR200(X) Series
'Declare Variables and Units
Public Batt_Volt
Public DOmV
Public DOppm
Units Batt_Volt=Volts
Units DOmV=mV
Units DOppm=ppm
'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min)
Sample(1,DOmV)
EndTable
DataTable(Table2,True,-1)
DataInterval(0,1440,Min)
Minimum(1,Batt_Volt,False,False)
EndTable
'Main Program
BeginProg
Scan(10,Sec)
'Default Datalogger Battery Voltage measurement Batt_Volt:
Battery(Batt_Volt)
'CS511 Dissolved Oxygen Probe measurements DOmV and DOppm:
VoltSE(DOmV,1,1,1,0)
DOppm=DOmV*0.34
'Call Data Tables and Store Data
CallTable(Table1)
CallTable(Table2)
NextScan
EndProg
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CS511-L Dissolved Oxygen Probe
7.2.2 Edlog
In Edlog, P1 is used for single-ended measurements, and P2 is used for differential
measurements. Section 7.2.2.1, Portion of CR10X Sample Program Using P1,
and Section 7.2.2.2, Portion of CR10X Sample Program Using P2, provide
examples.
7.2.2.1 Portion of CR10X Sample Program Using P1
The example measurement instructions that follow do not store
data to final storage. Additional instructions (typically P92, P77,
and output processing instructions such as P70) are required to
store data permanently.
NOTE
1: Volt (SE) (P1)
1: 1 Reps
2: 24 250 mV 60 Hz Rejection Range ; code 23 used for CR23X
3: 1 SE Channel
4: 1 Loc [ DOmV ]
5: 1.0 Multiplier *See Calibration*
6: 0.0 Offset
7.2.2.2 Portion of CR10X Sample Program Using P2
The example measurement instructions that follow do not store
data to final storage. Additional instructions (typically P92, P77,
and output processing instructions such as P70) are required to
store data permanently.
NOTE
1: Volt (Diff) (P2)
1: 1 Reps
2: 24 250 mV 60 Hz Rejection Range ; code 23 used for CR23X
3: 1 DIFF Channel
4: 1 Loc [ DOmV ]
5: 1.0 Multiplier *See Calibration*
6: 0.0 Offset
7.3 Calibration
The multiplier is used to calibrate the CS511 probe. To calculate the multiplier:
1) Program the datalogger using a multiplier of one (see Section 4.2, Use SCWin
to Program Datalogger and Generate Wiring Diagram, or Section 7.2,
Programming).
2) Wire the CS511 to the datalogger (see wiring diagram generated by SCWin
or see Section 7.1, Wiring).
3) If the CS511 has been deployed in the field, gently wipe the membrane with a
soft cloth.
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