sop 10. labview data acquisition program

8/3/2019 SOP 10. LabView Data Acquisition Program

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SOP 10. LabView Data Acquisition Program

Drafted by PAAQL, Purdue University for IFAFS-APECAB Project

(7/1/02)

Program Overview

This LabView Virtual Instrument (VI) program is to be used to automate air quality

measurements in the Six-State Emission Measurement Project [Air Sampling & Measurement

Methodology for Confined Animal Housing Systems (APECAB)] at the University ofMinnesota, Purdue University, North Carolina State University, Iowa State University, Texas

A&M University, and University of Illinois.

The structure of the program is schematically illustrated in Figure 4.

SettingsData sampling time,

saving time

Read filesWaveform; sensor

parameters

Create data fileName: IDyymmdd?.txt

Initialize

Data sampling65+ variables every sec.

Real-time, history, alarm

D/O (solenoids)Solenoids control

Save data

Data

Display

YesEvery y sec.

Data

No

StopYes

Stop

Data average

Midnight

AlarmsYes

Alarm email

Data email

Yes

Figure 4. Flow chart of the DAQ program.


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Files and Folders

The data acquisition program (DAQP) will consist of four files:

1. waveform.txt (controls the solenoid operation sequence)

2. records.txt (stores calibration and setting data)3. IFAFS.iak (configuration file of FieldPoint)

4. IFAFS mmddyy.llb (data acquisition program, of which part of the file name mmddyyrecords the month/date/year related version information)

These five files should be saved in the following two folders:

C:\IFAFS\DAQfiles\waveform.txt, records.txt

C:\IFAFS\Program\IFAFS mmddyy.llb, IFAFS.iak

A third folder will be created for data files:

C:\IFAFS\Data\

The waveform.txt File

The waveform.txt file contains a table with 13 rows and 13 columns (Table 1). The first row of

the file is a note and will not be used by the DAQP. Rows 2-13, column 1 (Loc#) will be

recorded in the data file to indicate sampling locations at specific measurement times. Rows 2-

13, columns 2-13 (S1-S12) defines the operation of 12 solenoids, with 1 and 0 indicatingopened and closed solenoids, respectively. This file should be saved using Tab-Delimited text

format.

The records.txt File

The records.txt file will be saved automatically after each sensor calibration or setting (alarmlevels, temperature controls, etc.) adjustment. The contents of the file can also be modified

directly with a text editor or spreadsheet software (e.g. MS Excel). This file should also be saved

using Tab-Delimited text format.

Data Files

The C:\IFAFS\Data\ folder will be used to store data files created by the LabView program. Tofacilitate the change of data files, a university ID (one letter) is placed as the first letter of the

data files.

Set the letter for data file ID at Settings in Frame 0 in the left sequence block. "A": ISU; "I":

UIUC; "M": UM; "N": NCSU; "P": Purdue; "T": TAMU.

Each time when the program is started or when a new day begins at midnight, one or two data

files (IDyyyymmdd?.txt and IDsyyyymmdd?.txt, where ? is a letter from "a" to "z") will be

created and saved in the "data" folder. During DAQP testing, if the program is started for 26


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times during the same day, the ? will be "z" and cannot go up further. If this happens, the

"*z.txt" file in the "data" folder will need to be cleaned up in order to re-run the program.

The data files will have Tab-Delimited text format. The first row will contain day and date. The

second row will be data headings. Measurement data will start from the third row (Table 2). Data

columns and their corresponding sensor connections will be arranged as shown in Table 3.

Measurement signals from the sensors/analyzers will be sampled every second. Sampled signals

will be averaged every 60 sec and saved in data file 1 (IDyyyymmdd?.txt). Data file 2(IDsyyyymmdd?.txt) will have shorter averaging times (e.g. every 5, 10, 15, 20 or 30 sec) and is

optional.

Data Acquisition Hardware

The hardware used with the DAQP consists of seven FieldPoint DAQ modules (two FP-TC-120modules for temperature measurement, four FP-AI-110 modules for analog inputs, and one FP-

DO-401 module for digital output) and one counter/DIO data acquisition card (PCI-6601,National Instruments Corporation).

The FieldPoint modules are connected in the following sequence as it is configured in the file

IFAFS.iak:

FP-1600; FP-TC-120; FP-TC-120; FP-AI-110; FP-AI-110; FP-AI-110; FP-AI-110; FP-DO-401

Running the DAQP

At initial operation

1. Run the IFAFS.iak file from FieldPoint Explorer;2. Check each DAQ module to ensure that they are correctly configured and are ready to

acquire data;

3. If modifications are made and need to be kept, save the IFAFS.iak file;4. Run Measurement and Instruments to test the status of the PCI-6601 card;

5. Open the IFAFS yymmdd.llb from LabView 6.1. In the File Dialog window that appears,

select IFAFS.vi and click OK. The panel of IFAFS.vi appears;

6. Select menu Windows- Show Diagram. In the Diagram window, select frame 0 inthe left sequence block. Check settings and make necessary changes. If the changes

should be permanent, go to File and Save to save the changes.

7. To run the program, click the run button (a white arrow) in the upper-left corner of thewindow;

8. To stop the program, hold and release the button "Stop" at the upper-right corner of the

window. In the dialog window that appears, select OK.


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Subsequent Operations

1. Open IFAFS yymmdd.llb from LabView 6.1 or from Windows Explorer. In the File

Dialog window that appears, select IFAFS.vi and click OK. The panel of IFAFS.vi

appears;

2. To run the program, click the run button (a white arrow) in the upper-left corner of thewindow;

3. To stop the program, hold and release the "Stop" button. At the dialog window that

appears, select OK.

Bugs and Suggestions

Bugs found in the DAQP and suggestions of DAQP improvement should be reported by email

([email protected]) or phone call (765-494-1195) to Jiqin Ni, Purdue University. Upgraded

DAQP files will be sent from Purdue University to other universities as an email attachment.


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Table 1. Contents of waveform.txt file.

"Note: S1-S6 are normally open to gas analyzers; S7-S12 are normally closed to M2, but open to

bypass."

Loc# S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12

1 0 1 1 1 1 1 0 0 0 0 0 0

2 1 0 1 1 1 1 0 0 0 0 0 0

3 1 1 0 1 1 1 0 0 0 0 0 0

4 1 1 1 0 1 1 0 0 0 0 0 0

5 1 1 1 1 0 1 0 0 0 0 0 0

6 1 1 1 1 1 0 0 0 0 0 0 0

7 1 1 1 1 1 1 1 0 0 0 0 0

8 1 1 1 1 1 1 0 1 0 0 0 0

9 1 1 1 1 1 1 0 0 1 0 0 0

10 1 1 1 1 1 1 0 0 0 1 0 0

11 1 1 1 1 1 1 0 0 0 0 1 0

12 1 1 1 1 1 1 0 0 0 0 0 1

Table 2. First rows of data filesMonday, July 01, 2002Date & Time Loc NH3, ppm NO, ppm H2S, ppb SO2, ppb CO2, ppm

07/01/2002 17:32:02 1 23 0.1 250 2 1250


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Table 3. Data file and sensor arrangement.DataCol #

Heading Sensor/solenoid DAQ hardware Ch# Line Signal

1 Date & Time --- --- --- --- PC clock

2 Smpl loc# --- --- --- --- Waveform

3 NH3, ppm NH3 analyzer FP-AI-110-1 0 1, 18 0-10 VDC4 NO, ppm NH3 analyzer FP-AI-110-1 1 3, 20 0-10 VDC

5 H2S, ppb H2S analyzer FP-AI-110-1 2 5, 22 0-10 VDC

6 CO2a, ppm CO2 2K FP-AI-110-1 3 8, 24 4-20 mA

7 CO2b, ppm CO2 10K FP-AI-110-1 4 10, 26 4-20 mA

8 Reserved FP-AI-110-1 5

9 Smpl P, Pa Setra P sensor FP-AI-110-1 6 13, 30 0-10 VDC

10 Smpl Q, L/m Mass flow FP-AI-110-1 7 15, 32 0-10 VDC

11 RH1, % HMW61Y #1 FP-AI-110-2 0 2, 18 4-20 mA

12 T(RH)1, C HMW61Y #1 FP-AI-110-2 1 4, 20 4-20 mA

13 RH2, % HMW61Y #2 FP-AI-110-2 2 6, 22 4-20 mA

14 T(RH)2, C HMW61Y #2 FP-AI-110-2 3 8, 24 4-20 mA

15 RH3, % HMW61Y #3 FP-AI-110-2 4 10, 26 4-20 mA

16 T(RH)3, C HMW61Y #3 FP-AI-110-2 5 12, 28 4-20 mA17 Reserved FP-AI-110-2 6


19 Mass, g/m TEOM #1 FP-AI-110-3 0 1, 18 0-10 VDC

20 Filter, % TEOM #1 FP-AI-110-3 1 3, 20 0-10 VDC

21 Atm P, Pa TEOM #1 FP-AI-110-3 2 5, 22 0-10 VDC

22 Mass2, g/m TEOM #2 FP-AI-110-3 3 7, 24 0-10 VDC

23 Filter2, % TEOM #2 FP-AI-110-3 4 9, 26 0-10 VDC

24 Atm P2, Pa TEOM #2 FP-AI-110-3 5 11, 28 0-10 VDC



27 Wind V, m/s Met sensor NI-6601 Ctr 0 2, 1 0/5 VDC

28 Wind D, Met sensor FP-AI-110-4 0 1, 18 0-10 VDC

29 Radiation, W/m Met sensor FP-AI-110-4 1 ?

30 dP1, Pa Setra P sensor FP-AI-110-4 2 5, 22 0-10 VDC






36 T1, C Thermocouple FP-TC-120-1 0 1, 2





41 T6, C Thermocouple FP-TC-120-1 5 11, 1242 T7, C Thermocouple FP-TC-120-1 6 13, 14





Continued on next page


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Table 3. ContinuedData

Col #

Heading Sensor/solenoid DAQ hardware Ch# Line Signal




50 T15, C Thermocouple FP-TC-120-2 6 13, 1451 T16, C Thermocouple FP-TC-120-2 7 15, 16

52 Fans1, % time Sail Switch NI-PCI-6601 DIO_0 10, 1 0/5 VDC











63 Fans12, % time Sail Switch NI-PCI-6601 DIO_11 52, 1 0/5 VDC64 Fans13, % time Sail Switch NI-PCI-6601 DIO_12 53, 1 0/5 VDC




68 B1 airflow, m/s --- --- --- --- LabView

69 B2 airflow, m/s --- --- --- --- LabView

--- --- Solenoid 1 FP-DO-401 0 24 VDC












--- --- Reserved FP-DO-401 12




Note: 1. Refer to page 4-2 of the "DAQ 6601/6602 User Manual" for counter and DIO

channel connections. The physical connectors are located in CB-68LP, theaccessory of DAQ 6601.

2. +5VDC can be obtained from line #1 or another source.

3. Sail Switches can also be connected to AI using variable analog signals for multi-sensors.

4. There are 32 DIO channels available at the DAQ 6601. This table only includes

16 (data columns 52-67).

sop 10. labview data acquisition program

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