Campbell-scientific CPEC200 Closed-Path Eddy-Covariance System Bedienungsanleitung

INSTRUCTION MANUAL CPEC200 Closed-Path Eddy-Covariance System Revision: 7/14 Copyright © 2013- 2014 Campbell Scientific, I

Table of Contents G-3. Interior of CPEC200 scrub module with tubing and cover removed ...

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance Pump Control The pump is turned on automatically when the Zero Air valve is

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance Edit the CPEC200 CRBasic program to set constant SCRUB_MODULE = True and rec

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance Disconnecting this tube ensures the bottles are not pressurized when the cov

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance FIGURE G-4. Empty bottle showing the top (on the right with spring) and bo

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance G-6

Appendix H. CPEC200 Pump Replacement H.1 Introduction A properly maintained CPEC200 system will exceed the lifetime of the system’s pump. This sec

Appendix H. CPEC200 Pump Replacement FIGURE H-2. Upright filter unit in enclosure 4. With the filter assembly removed from the CPEC200 pump module

Appendix H. CPEC200 Pump Replacement FIGURE H-4. Exposed CPEC200 pump assembly 6. Remove pump connector from the pump electronics (FIGURE H-5). F

Appendix H. CPEC200 Pump Replacement FIGURE H-6. Self-tapping screws attaching pump to metal box 8. Cut the blue (inlet) and red (outlet) tubing o

Appendix H. CPEC200 Pump Replacement FIGURE H-8. Inlet and outlet tubing reconnected to pump FIGURE H-9. Pump side with inlet and outlet tubing c

CPEC200 Closed-Path Eddy-Covariance System 1. Introduction The CPEC200 is a closed-path, eddy-covariance (EC) flux system used for long-term monitor

Appendix H. CPEC200 Pump Replacement FIGURE H-10. Proper positioning of CPEC200 in shell cover 5. Hold the pump assembly securely to the shell cov

Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbe

CPEC200 Closed-Path Eddy-Covariance System o Do not overtighten the tube fittings. Consult Appendix E, Using Swagelok® Fittings, for information on

CPEC200 Closed-Path Eddy-Covariance System 4.1.1.2 EC100 Electronics The EC100 electronics module (FIGURE 4-2) controls the EC155 and CSAT3A. It is

CPEC200 Closed-Path Eddy-Covariance System 4.1.1.4 CPEC200 Pump Module The pump module (FIGURE 4-4) uses a small, low-power diaphragm pump to draw ai

CPEC200 Closed-Path Eddy-Covariance System FIGURE 4-5. CR3000 datalogger 4.1.2.2 NL115 or CFM100 Storage Module The datalogger saves data onto a Co

CPEC200 Closed-Path Eddy-Covariance System 4.1.2.3 CPEC200 Valve Module The optional CPEC200 valve module (FIGURE 4-8) is housed in the CPEC200 enclo

CPEC200 Closed-Path Eddy-Covariance System FIGURE 4-9. CSAT3A sonic anemometer head 4.1.2.5 Barometer The EC100 is always configured with an EC100

CPEC200 Closed-Path Eddy-Covariance System pump module is similar to the ENC10/12 enclosure. The same mounting options are available and outlined bel

CPEC200 Closed-Path Eddy-Covariance System Minimize the length of these tubes to reduce the amount of equilibration time required after the zero or CO

CPEC200 Closed-Path Eddy-Covariance System available from Campbell Scientific. For more details about this card, see Application Note 3SM-F, PC/CF Ca

CPEC200 Closed-Path Eddy-Covariance System 4.1.5 Replacement Parts Intake Filter: The EC155 intake filter (FIGURE 4-12) will become clogged over tim

CPEC200 Closed-Path Eddy-Covariance System FIGURE 4-14. Humidity indicator card EC155 Replacement Chemical Bottles: The EC155 has two small bottles

CPEC200 Closed-Path Eddy-Covariance System 4.2 Theory of Operation The CPEC200 is used for long-term monitoring of atmosphere–biosphere exchanges of

CPEC200 Closed-Path Eddy-Covariance System 4.2.2 CSAT3A Sonic Anemometer Head The CSAT3A, as shown in FIGURE 4-17, is an ultrasonic anemometer sensor

CPEC200 Closed-Path Eddy-Covariance System For the three-valve version, the inputs are: • Zero • CO2 Span 1 • H2O Span For the six-valve version,

CPEC200 Closed-Path Eddy-Covariance System The CPEC200 valve module includes a heater and a fan to keep the valves within their operating range of 0°C

CPEC200 Closed-Path Eddy-Covariance System The outlet of the pump connects the Exhaust fitting on the bottom of the pump module enclosure. This fitti

CPEC200 Closed-Path Eddy-Covariance System • Small, flat-tip screwdriver (included with EC100 and CPEC200) • Large, flat-tip screwdriver (included w

CPEC200 Closed-Path Eddy-Covariance System back on the leg of a CM110 tripod in FIGURE 5-1, but they may also be mounted on a vertical pipe, triangula

Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service

CPEC200 Closed-Path Eddy-Covariance System FIGURE 5-2. CM210 mounting bracket on a tripod mast The EC155 gas analyzer and CSAT3A sonic anemometer he

CPEC200 Closed-Path Eddy-Covariance System 5.2 Plumbing FIGURE 5-4 shows the basic plumbing configuration of a CPEC200 including the cylinders requir

CPEC200 Closed-Path Eddy-Covariance System FIGURE 5-5. Connecting pump tube from EC155 analyzer to pump module 5.2.2 Zero/Span The CPEC200 can perf

CPEC200 Closed-Path Eddy-Covariance System Make sure there are no leaks in the regulators or the connections to the valve module. For automatic operat

CPEC200 Closed-Path Eddy-Covariance System FIGURE 5-6. Enclosure and tripod grounded to a copper-clad grounding rod 5.3.2 EC Sensor Cables Ensure t

CPEC200 Closed-Path Eddy-Covariance System Wire the SDM communications cable (CABLE4CBL-L) between the EC100 and the CPEC200 enclosure as shown in FIG

CPEC200 Closed-Path Eddy-Covariance System FIGURE 5-9. Wiring to EC100 electronics FIGURE 5-10. Wiring to CPEC200 enclosure EC100 Power Cable E

CPEC200 Closed-Path Eddy-Covariance System 5.3.3 Pump Module Cable Ensure the CPEC200 system is not powered, and connect the pump module cable to the

CPEC200 Closed-Path Eddy-Covariance System 5.4 Configure the Program A CR3000 datalogger program Cpec200_vx_x.cr3 is included with the CPEC200 system

CPEC200 Closed-Path Eddy-Covariance System BATT_DEADBAND: This variable, along with BATT_LOWLIMIT, determines when the CPEC200 will restart after an a

Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing

CPEC200 Closed-Path Eddy-Covariance System PUMP_SETPT: Variable PUMP_SETPT determines the volumetric flow rate at which the pump will draw the air sam

CPEC200 Closed-Path Eddy-Covariance System CAL_FLOW_SETPT: Determines the rate at which the zero or CO2 span gas will flow. The path the gas takes is

CPEC200 Closed-Path Eddy-Covariance System CHECK_SPAN2: Check the gas analyzer span against CO2 gas number 2 (requires the 6-valve module). CHECK_SPAN

CPEC200 Closed-Path Eddy-Covariance System Public variable mode_status describes the basic operating state of the CPEC200. Verify mode_status = Normal

CPEC200 Closed-Path Eddy-Covariance System In addition to identifying the most appropriate use of manual versus automatic and remote versus onsite cal

CPEC200 Closed-Path Eddy-Covariance System TABLE 6-1. Automatic Zero/Span Sequence Step Mode Status Pump valve_number Duration (sec) Keypad Value

CPEC200 Closed-Path Eddy-Covariance System To initiate a zero/span sequence manually, first turn on the temperature control for the valves by setting

CPEC200 Closed-Path Eddy-Covariance System 6.3.2 Full Manual Control of Zero and Span In some cases it may be more appropriate to run the zero/span u

CPEC200 Closed-Path Eddy-Covariance System Set valve_number to ZeroAir (1). If onsite, look at the LEDs on the valve module to confirm the selected v

CPEC200 Closed-Path Eddy-Covariance System The keyboard display has menus to facilitate manual zero control for users that are onsite. Navigate: Manu

Precautions DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO

CPEC200 Closed-Path Eddy-Covariance System 7.1 Enclosure Desiccant Check the humidity indicator card in the mesh pocket in the CPEC200 system enclosu

CPEC200 Closed-Path Eddy-Covariance System 7.4 EC155 Chemical Bottles If more than one year has passed since replacing the desiccant/scrubber, or if

CPEC200 Closed-Path Eddy-Covariance System 42

Appendix A. CPEC200 Diagnostics A.1 Overview CPEC200 diagnostic information is available to the user in any of three different formats: status text

Appendix A. CPEC200 Diagnostics If the CPEC200 program is configured for valve operation there are more possibilities: • Normal EC mode: Pump is on

Appendix A. CPEC200 Diagnostics because the EC100 is not powered, or the SDM cable from the datalogger to the EC100 is not connected. • ERROR: No EC

Appendix A. CPEC200 Diagnostics This usually means the CSAT3A sensor head is not connected to the EC100. • ERROR: Sonic problem - Check diag_sonic i

Appendix A. CPEC200 Diagnostics If the program is configured to use the valve module (constant VALVE_MODULE = True), but the valves are not being use

Appendix A. CPEC200 Diagnostics pressure sensor is used to infer flow, and Section 6.3.2, Full Manual Control of Zero and Span, for more detailed inf

Appendix A. CPEC200 Diagnostics notes on bit 8 and on irga_status, which may give additional information about the IRGA problem. pump_flow_OK Boolean

Appendix A. CPEC200 Diagnostics scrub_tmpr_OK Boolean variable scrub_tmpr_OK is defined only if the CPEC program is configured to use a scrub module.

Appendix A. CPEC200 Diagnostics TABLE A-1. Summary CPEC200 diagnostic flags encoded in diag_cpec Binary Bit (LSB = 1) Numeric Value Relevant? Corres

Appendix A. CPEC200 Diagnostics The purpose of the deadband (the gap between the shutdown voltage and the turn-on voltage) is to protect the CPEC200

Appendix A. CPEC200 Diagnostics 3. If diag_irga is a number greater than zero, this indicates the EC100 has detected a problem. Troubleshoot per th

Appendix A. CPEC200 Diagnostics respond by increasing pump_control. This should increase the speed of the pump and allow pump_flow to rise to the se

Appendix A. CPEC200 Diagnostics time during the averaging period. A value of 0 indicates a pump temperature problem during the entire time. To conti

Appendix A. CPEC200 Diagnostics Conversely, processing tasks that affect real-time control functions may be adversely affected if there are processin

Appendix A. CPEC200 Diagnostics If the value of valve_flow = NAN, this indicates a problem with the valve flow measurement. The valve flow is inferr

Appendix A. CPEC200 Diagnostics generator and the Valve Module inlet. Make sure there is no tee in this connection (see Section 5.2.2, Zero/Span).

Appendix A. CPEC200 Diagnostics table ts_data, the state of fans and heaters is encoded into variable ControlBits to conserve memory space. See Appe

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 spec

Appendix A. CPEC200 Diagnostics Next, compare scrub_tmpr it to the operating range (5°C to 50°C). The scrub module will be disabled if it is too col

Appendix B. Public Variables Some of the variables in the CPEC200’s CRBasic program are included in the Public table. These public variables may be

Appendix B. Public Variables TABLE B-1. CPEC200 public variables When Defined Usage Variable Name Units Description always SONIC Ts ºC Sonic virtual

Appendix B. Public Variables TABLE B-1. CPEC200 public variables When Defined Usage Variable Name Units Description VALVE_MODULE INFO/USER valve_num

Appendix B. Public Variables TABLE B-1. CPEC200 public variables When Defined Usage Variable Name Units Description always DIAG BattVolt_OK Boolean

Appendix B. Public Variables TABLE B-1. CPEC200 public variables When Defined Usage Variable Name Units Description always CONFIG SET_ZERO Set = Tr

Appendix B. Public Variables B-6

Appendix C. Output Variables The CPEC200 program stores data in several output tables. Details are given for each table. ts_data The primary output

Appendix C. Output Variables TABLE C-1. Values stored in table ts_data Compile Switch Variable Name Units Description cell_press kPa Pressure in th

Appendix C. Output Variables The next eleven values (wind_speed through flux samples) give several values associated with the online fluxes. The num

Table of Contents 5.4 Configure the Program ... 28 5.4.1 System Configuration Var

Appendix C. Output Variables TABLE C-2. Values stored in table flux Compile Switch Variable Name Units Description wind_speed m∙s-1 Average wind sp

Appendix C. Output Variables TABLE C-2. Values stored in table flux Compile Switch Variable Name Units Description source_tmpr_Avg ºC Average sourc

Appendix C. Output Variables at seven records per sequence, and sequences run every hour). The CPU has storage allocated for 500 records (3 days).

Appendix C. Output Variables TABLE C-3. Values stored in table zero_ span Compile Switch Variable Name Units Description V panel_tmpr_Avg ºC Average

Appendix C. Output Variables If there is some error condition that prevents the zero/span sequence from starting, one of the following messages will

Appendix C. Output Variables Compile Switches. The code shown in the table can be either V, S, or a combination of two of the codes.  V is define

Appendix C. Output Variables TABLE C-4. Values stored in table message_log Compile Switch Variable Name Units Description V valve_number Valve numb

Appendix C. Output Variables TABLE C-5. Values stored in table config_history Variable Name Units Description CO2_SPAN_PPM µmol∙mol-1 CO2 mixing rat

Appendix C. Output Variables C-12

Appendix D. Control Bits For diagnosing a problem using data saved in the output table, ts_data, the state of fans and heaters is encoded into varia

Table of Contents G. CPEC200 Scrub Module Installation, Operation and Maintenance ... G-1 G.1 Theory

Appendix D. Control Bits If ControlBits is greater than 255, this indicates bit 9 of ControlBits is set. This means the sample pump heater is on. T

Appendix E. Using Swagelok® Fittings This appendix gives a few tips on using Swagelok® tube fittings. For more information, consult your local Swag

Appendix E. Using Swagelok® Fittings First-time assembly, metal tubing: Extra care is needed to avoid overtightening brass fittings when used with me

Appendix E. Using Swagelok® Fittings Tubing inserts Inserts are recommended for use in plastic tubing. These inserts become permanently attached to

Appendix E. Using Swagelok® Fittings Plugs Swagelok® plugs are used to plug a fitting when its tube is disconnected. It is strongly recommended to p

Appendix F. Installing the AC/DC Power Adapter Kit The AC/DC Power Adapter Kit is configurable within the CPEC200 system enclosure to allow the CPEC

Appendix F. Installing the AC/DC Power Adapter Kit FIGURE F-2. Power supply in mounting bracket 4. Tighten the Velcro® strap to secure the power s

Appendix F. Installing the AC/DC Power Adapter Kit FIGURE F-4. Connections for the power supply in CPEC200 enclosure 6. If the AC/DC adapter kit w

Appendix F. Installing the AC/DC Power Adapter Kit F-4

Appendix G. CPEC200 Scrub Module Installation, Operation and Maintenance The CPEC200 Scrub Module provides a stream of air that has been scrubbed of