MESA LABORATORIES PQ 200 Manuale utente

Mesa Laboratories, Inc.

12100 West 6th Ave.

Lakewood, CO 80228

.MesaLabs.com

MK101-05 Rev B

PQ 200 Air Sampler

User Manual

U.S. EPA FRM Designated Sampler

PM2.5 RFPS-0498-116

PM10 RFPS-1298-125

NOTICE

This manual pertains to the Revision U(C8445) version of the PQ200. Refer to the table of contents for

information on previous versions of the sampler.

Customer Support and Technical Assistance

For technical assistance or to request repairs or replacement parts, contact Mesa Labs at (973) 492-8400,

or by e-mail at csbutler@mesalabs.com.

Table of Contents

Section Page

1.0 Introduction………………………………………………………………………………………………………………………...5

2.0 Instrument Description………………………………………………………………………………………………………… 6

3.0 Specifications……………………………………………………………………………………………………………………..10

4.0 Safety……………………………………………………………………………………………………………………………….10

5.0 Setup

5.1. Initial Setup Instructions……………………………………………………………………………………………………………...10

5.2 Initially Po ering the PQ200……………………………………………………………………………….………………………..15

5.3 Setting the Date and Time…………………………………………………………………………………………………………...15

5.4 Entering Site and Filter Information……………………………………………………………………………………………….15

5.5 Initial Performance Checks……………………………………………………………………………………………………………15

6.0 Operation

6.1 Run the Sampler from Midnight to Midnight……………………………………………………………………….…………...17

6.2 Run the Sampler ith User-Defined Start/Stop Times……………………………………….………………………………18

6.3 While the PQ200 is Running…………………………………………………………………………………………………………..18

6.4 Temporary Halt Then Continue Sampling………………………………………………………………………………………..19

6.5 Ending a Run………………………………………………………………………………………………………………….……………20

6.6 Data Do nload Instructions…………………………………………………………………………………………………………..20

6.6.1 Data Do nload Using USB On-The-Go (OTG) Flash Drive…………………………………………………………20

6.6.2 PQ200 Job Controller Soft are for Windo s……………………………………………………………………………20

6.6.3 Data Do nload Using the PQ200 Menu………………………………………………………………………………….21

6.6.4 Data Do nload Using Serial Communication Commands………………………………………………………….21

7.0 Calibration

7.1 Flo Rate

7.1.1 Flo Rate Calibration…………………………………………………….……………………………………………………23

7.1.2 Verifying Flo Rate……………………………………………………….……………………………………………………24

7.1.3 Changing Flo Rate…………………………………………………………………….……………………………………..24

7.2 Temperature Probe

7.2.1 Verifying Temperature……………………………………………………………………………….……………………….25

7.2.2 Calibrating Temperature………………………………………………………………………………………….………….25

7.3 Barometric Pressure

7.3.1 Pressure Calibration and Verification……………………………………………………………………..………………26

7.4 Leak Tests

7.4.1 External Leak Test……………………………………………………………………………………………………………...26

7.4.2 Internal Leak Test…………………………………………………………………………………………………….………..27

8.0 Maintenance

8.1 Cleaning the Inlet, VSCC, and Do ntube…….…………………………………………………………………………………27

8.2 Rebuilding the Pump…. ………………………………………………………………………………………………………….......27

8.3 Updating Firm are………………………………………………………………………………………………………………………28

9.0 Troubleshooting………………………………………………………………………………………………………………..29

10.0 Warranty………………………………………………………………………………………………………………………….31

Appendix A Parts List and Blo -Out Figures………………………………………………………………………………32

Appendix B PQ200 Sampler Menu Tree…………………………………………………………………………………….47

Appendix C Filters and Weighing Procedure………………………………………………………………………………49

Appendix D Dip S itch Functions……………………………………………………………………………………………..51

Appendix E Use of the PQ200 as a PM

Designated Reference Sampler………………………………………54

Appendix F Solar Panel Po er Supply……………………………………………………………………………………….55

Appendix G Accessories…………………………………………………………………………………………………………..62

Appendix H PQ200 Job Controller Soft are……………………………………………………………………………….64

Appendix I Terminal Program Interface……………………………………………………………………………………67

Appendix J Very Sharp Cut Cyclone – VSCC – Instructions for Use and Maintenance…………………….68

Appendix K Updating Main Controller Board to “Rev U”………………………………………………………………71

Appendix L Instructions for PMcoarse Sampling…………………………………………………………………………..77

Appendix M Leak Test Procedure for S’Ns 906 through 1016……………………………………………………….79

Appendix N Rev “D” PCBs Calibration and Parts…………………………………………………………………………81

Appendix O WINS Installation………………………………………………………………………………………………….85

Appendix P Pump Rebuild Instructions……………………………………………………………………………………..87

Appendix Q Revision T Manual…………………………………………………………………………………………………97

Figure List

Name Page

Figure 1. Schematic Vie of System……………………………………………………………………………………….9

Figure 2. Exploded Vie of Components Installed in Back of Instrument………………………………....14

Figure A1. Filter Holder ith PM

Adapter Installed………………………………………………………………….33

Figure A2. PQ200 Pump Exploded Dra ing……………………………………………………………………………..34

Figure A3. Instrument Panel Exploded Dra ing……………………………………………………………………….35

Figure A4. Components Behind Door………………………………………………………………………………………36

Figure A5. PM10 Size Selective Inlet……………………………………………………………………………………….37

Figure A6. Current Model Cables…………………………………………………………………………………………….38

Figure A7. Current Model Cables…………………………………………………………………………………………….39

Figure A8. Current Model Cables…………………………………………………………………………………………….40

Figure A9. Location of Cable Connections…………………..……………………………………………………………41

Figure A10. Location of Cable Connections on Rev T PCB……………………………………………………………42

Figure D1. Location of Dip S itches………………………………………………………………………………………..51

Figure D2. PQ200 Dip S itch………………………………………………………………………………………………….53

Figure E1. PM

Adapter and Filter Holder, Open………………………………………………………………………54

Figure F1. Setup of Solar Panel………………………………………………………………………………………………58

Figure F2. Orientation of Solar Panel………………………………………………………………………………………59

Figure F3. Setting the Tilt Angle…………………………………………………………………………………………….60

Figure F4. Wiring Connections……………………………………………………………………………………………….61

Figure G1. Cassette Opener (CO1)………………………………………………………………………………………….62

Figure G2. Cassette Transport Carrier (F214)…………………………………………………………………………..62

Figure J1. Flo Path in VSCC Cyclone…………………………………………………………………………………….68

Figure J2. Exploded Diagram of VSCC…………………………………………………………………………………….70

Figure K1. Exploded Vie of Obsolete Instrument Panel Configuration………………………………..…….74

Figure K2. Exploded Vie of Instrument Panel…………………………………………………………………………75

Figure K3. Location of Lo Voltage and Ambient Cables on Inside Panel……………………………………76

Figure K4. Location of Pressure Hoses…………………………………………………………………………………….76

Figure N1. Obsolete Cables from Rev D PCB…………………………………………………………………………….83

Figure N2. Obsolete Cables from Rev D PCB…………………………………………………………………………….84

Figure P1. PQ200 Pump Exploded Dra ing……………………………………………………………………………..95

Figure P2. Orientation of Valve Plates……………………………………………………………………………………..96

Figure Q1. Location of temperature probe trimpots on Rev T PCB………………………………………………22

1 0 Introduction

The purpose of this manual is to provide complete operation, calibration, and maintenance details for the

BGI PQ200 air sampler. This instrument has been specifically designed to meet or exceed the operational

requirements of a Reference Method sampling device under 40 CFR Part 50, Appendices J and L. For

additional guidance on sampler operation, recommended maintenance, and procedures for filter handling

and eighing, refer to the EPA Quality Assurance Handbook Volume II

The PQ200 is a microprocessor-controlled air sampling instrument capable of sampling TSP, PM

, and

2.5

over user-defined volumetric flo rate and sampling period. The PQ200 includes an internal battery,

hich allo s the investigator to perform their ork in areas here no line po er is available. DC po er

operation can be further augmented ith a po er supply/charger, or external batteries and solar po er.

Further details about solar po er operation are available in Appendix F. Recovered data may be handled

ith provided Windo s soft are. The instrument is manufactured entirely in the U.S. in an ISO 9001-

certified facility in Butler, Ne Jersey.

Current Models

Part Number Description

PQVSCC PQ200 PM

2.5

Sampler - The PQ200 configured for PM

2.5

sampling includes a BGI Very Sharp Cut Cyclone (VSCC

)

and PM

louvered inlet head. This instrument as

designated as a PM

2.5

sampler under Federal Reference

designation number RFPS-0498-116.

PQ200PM10 PQ200 PM

Sampler - The PQ200 configured for PM

sampling includes a PM

louvered inlet head and a straight

passage replacing the VSCC

or WINS. This instrument

as designated as a PM

sampler under Federal Reference

designation number RFPS-1298-125.

PQVSCC and

PQ200PM10

The PQ200 PM

Coarse

Samplers - The PQ200 may also be

configured for sampling the PM Coarse (PM

Coarse

). PM

coarse

defined by the U.S. EPA as the size fraction bet een PM

and PM

2.5

. This measurement requires t o PQ200

samplers, one for PM

and one for PM

2.5

. Specific

instructions for operating instruments to perform these

measurements are described in Appendix K.

Legacy Model

The PQ200A PM

2.5

Audit Sampler - PQ200A is a legacy version of the PQ200 sampler including transport

cases and limited enclosure modifications. The PQ200A model is covered under the original designation

as amended August 1998.

1 U.S. EPA Quality Assurance Handbook for Air Pollution Measurement Systems:

http:// .epa.gov/ttnamti1/files/ambient/pm25/qa/QA-Handbook-Vol-II.pdf

2 0 Instrument Description

Your PQ200 comes ith the follo ing:

PQ200 sampler

Do ntube

inlet ith ater jar

VSCC or PM

adapter installed in filter assembly (model dependent)

12V battery

Filter cassette

AC po er adapter

Legs (3)

Ambient temperature sensor ith radiation shield

Leak test kit (flo audit adapter and filter cassette plus rubber discs)

Do nload cable

The components and basic instrument operation are as follo s:

Inlet The louvered size-selective inlet is manufactured according to design dra ings

and specifications in 40 CFR 50 Appendix L. It is designed to operate

independently of ind direction and ind speed, ith a throughput of 16.7 LPM.

The louvered design and ind deflector hinders rain intrusion. An enlarged ater

exit hole in the impactor plate is used to promote ater flo to the ater

collection jar.

Do ntube The do ntube, also specified by design dra ings in 40 CFR 50 Appendix L,

transports the aerosol from the inlet to the filter assembly.

VSCC The Very Sharp Cut Cyclone (VSCC

) as designed by BGI as a replacement to

the WINS PM

2.5

separation impactor. Per 40 CFR 50 Appendix L, the VSCC may

be used in any FRM device as a PM

2.5

particle size selector. The VSCC

-B model

is designed to fit the filter assembly of the PQ200. When sampling PM

, the PM

adapter should be used in place of the VSCC

. All PQ200 ith a PM2.5

configuration ill come standard ith a VSCC.

2.5

WINS Impactor The WINS (Well Impactor Ninety-Six) PM

2.5

impactor is described by dra ings

and specifications in 40 CFR 50 Appendix L. The ell impactor, hen properly

operated ith a 37 mm glass fiber filter and 1 mL of Do 704 diffusion oil in the

ell, is designed to operate for approximately one eek, depending on the

ambient concentrations, ithout overloading or alteration of the cutpoint or

collection efficiency curve. Most modern PM

2.5

samplers use the VSCC over the

WINS. The WINS is no longer produced by Mesa Labs.

Adapter For PM

sampling, the PQ200 uses an adapter to provide a straight passage to

the filter. This adapter is a direct replacement for the VSCC-B and is approved for

PM10 sampling by the U.S. EPA under Federal Reference designation number

RFPS-1298-125.

Filter Holder The filter holder and filter cassette are manufactured per the dra ings in 40 CFR

50 Appendix L. The upper filter holder housing is designed into the same piece

as the VSCC-B. The lo er section houses the filter temperature probe and the air

hose connection, hich leads to the pump system. O-rings on the upper and

lo er housings ensure a tight seal around the filter cassette. The filter cassette

itself is made of Delrin

and has upper and lo er sections hich snap together.

These t o halves sand ich a single 47 mm filter and a stainless-steel screen

hich serves as a backing/support plate for the filter. To ensure a tight seal, the

filter cassette as designed ith an interference fit hich can initially make

opening and closing the cassette difficult. Practice is recommended so that the

cassette may be opened ithout damaging or dropping the filter.

Flo System The flo system of the instrument is schematically illustrated in Figure 1. The

configuration from the size selective inlet to the filter holder is mandated for

Reference Methods under 40 CFR Part 50 Appendix L. From the filter holder, air

flo s through an interception ater separator. The separator is fitted ith a

clear elastomeric tube located in the right, rear of the instrument case behind

the filter holder. The bottom of this tube is fitted ith a push valve on the

bottom/outside of the case to permit the draining of ater collected in the clear

tube. The flo of air is directed through the mass flo sensor and then to a

pulsation dampening volume. Prior to the pump, the air passes through the

solenoid valve. The sole purpose of this valve is to provide a means of sealing

the far end of the system hen the automatic leak check function is activated.

The pump is a Mesa-manufactured, double diaphragm unit designed especially

for this instrument.

A microprocessor controls the flo system. The mass flo sensor detects the

mass flo rate through the unit, from hich the microprocessor then computes

the volumetric flo rate utilizing the current barometric pressure and ambient

temperature.

The algorithm used for this process is:





 = Q



∗







∗







Where:

vol

is the current volumetric flo rate in liters per minute

cal

is the calibrated volumetric flo rate in liters per minute

(calibrate at 16.67 LPM for EPA sampling)

vol

is the current ambient temperature (K)

cal

is the calibration ambient temperature (K)

vol

is the current ambient barometric pressure in mmHg

cal

is the calibration barometric pressure in mmHg

While the sensor is detecting the mass of air flo ing, the calibration device

utilized is volumetric. The microprocessor is logging a mass flo rate along ith

barometric pressure and temperature at the time of calibration. The firm are in

the microprocessor calculates a volumetric flo rate based on current actual

conditions. This calculation and control adjustment is updated every 200

milliseconds.

Temperature Sensors Temperature measurement is accomplished ith a linearized thermistor circuit. A

shunt resistor (R1) in series ith a precision thermistor ith a negative

temperature coefficient (TH1) decreases the rate of resistance change as

temperature decreases. When used as a voltage divider, this circuit ill produce

a linear output voltage proportional to temperature. Resistor R2 and thermistor

TH2 provide compensation for the typically narro range of this simple approach

providing a total accurate range of -30° to +50° C ith a linearity deviation of

+/- 0.16° C.

Pressure Measurement Ambient barometric pressure is measured using a precision temperature-

compensated absolute pressure transducer. Its amplified output is signal-

conditioned to obtain a voltage that is compatible ith the PQ200 A/D converter

and maximizes resolution by spanning the desired range across the A/D

converter’s input range. The inlet port of the barometric sensor is vented to

outside the PQ200 case to eliminate errors due to case pressurization.

Unit Controls Complete control of the sampler is achieved through only six buttons.

ON/OFF

SELECT EXIT LIGHT

The buttons have these functions:

ON/OFF: po ers the PQ200 on and off

UP/DOWN ARROWS: navigate through menu items

SELECT: chooses the current selection

EXIT: hen available, it serves as the “back” or “exit” button

LIGHT: lights the screen hen operating on battery po er

Po er The PQ200 as designed to operate from a nominal 12 Volt DC source. Alternate

po er and battery charge is supplied via a standard, UL listed, class VI po er

supply. Auxiliary po er can also be supplied via an external battery and/or solar

panel to provide operation in remote areas.

When Operating from Batteries

The display ill sho Bty xx% ( here xx = 00 to 99) and indicates approximate capacity. When the

Charger/External po er supply is plugged in, the screen ill display [DC In] or toggle bet een [DC In]

and [Charged] depending on the internal battery status. While running from external batteries, the

display ill sho EXT xx% indicating the approximate capacity of the external battery. A s itching circuit

ithin the PQ200 ill automatically detect ho the unit is po ered and ill display appropriately. When

using an external battery, the PQ200 ill drain the external battery first until cut-out occurs at

approximately 10.5VDC to prevent deep discharge. At this point, the internal battery ill then be

s itched into use. If the external battery is being charged by a solar panel, the unit ill automatically

s itch to being po ered by the external battery once it attains a charge of approximately 50%.

3 0 SPECIFICATIONS

PQ200 sampler eight: 48 lbs (21.8 kg)

Inlet and do ntube eight: 5.5 lbs (3.4 kg)

Legs eight: 8 lbs (3.6 kg)

Complete system eight: 61.5 lbs (27.9 kg)

Enclosure Dimensions: 16 x 19 x 18 inches (41.1 x 48 x 47 cm)

Height of inlet above ground: 6.56 ft (2 m)

Display: LCD screen

Data Port: RS-232

4 0 SAFETY

The PQ200 should only be operated as described and for its intended use. Because the PQ200 runs

primarily from battery po er, all the typical hazards associated ith high voltages and internal AC iring

have been reduced or eliminated. Personal injury, damage to the instrument, or fire can occur if the

follo ing electrical precautions are not observed:

•Caution should al ays be given hen attaching the AC mains po er connection. Do not attempt

to connect main po er if the plug or ire are cracked or frayed.

•Do not attempt to connect main po er if the po er cord, leads, or outlet are et. Do not

immerse po er cords in ater or other liquids.

•Place po er cords a ay from traffic and do not allo anything to rest on them during operation.

•Do not overload AC outlets.

•Do not attach improperly- ired external batteries, solar panels, or po er sources.

•Allo a fe inches for ventilation at the rear of the instrument. Do not allo the fan opening to

become clogged or blocked.

•Do not open the control panel or handle any other of the electrical parts hile po er is applied to

the PQ200. Al ays disconnect the po er supply first.

•Al ays operate the PQ200 in a normal, upright position. The legs should be bolted do n to

prevent tipping in conditions of high inds.

•Do not operate the PQ200 if any of the parts are defective, damaged, or missing.

5 0 Setup

5 1 Initial Setup Instructions

When you first receive your PQ200, unpack all of the components to ensure that you received all of the

correct parts and nothing as damaged during shipment. It is recommended that each PQ200 sampler

be assembled initially in a laboratory or other environment to check operation prior to installation in the

field.

Follo these steps to set up your PQ200 sampler:

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