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- Page 1 OPERATION MANUAL SASS/SuperSASS Speciation Sampler SASS-9805 Rev A Met One Instruments, Inc. 1600 NW Washington Blvd. Grants Pass, OR 97526 Telephone: (541) 471-7111 Facsimile: (541) 471-7116 metone.com...
- Page 2 For more information about Acoem, please visit: acoem.com SASS Operation Manual - © Copyright 2023 Met One Instruments, Inc. All Rights Reserved worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language in any form without the express written permission of Met One Instruments, Inc.
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Page 3: Table Of Contents
Tripod Assembly ..................19 4.1.1 Tripod Leg Deployment ..................19 4.1.2 Securing the EX-905 Tripod .................. 19 Sass Sampling Head Assembly and Mounting ..........20 Filter Canister Assembly and Installation ............. 23 4.3.1 Multi Cell Denuder ....................23 4.3.2 Sharp Cut Cyclone (SCC) ..................26 4.3.3... - Page 4 Test Menu ........................ 41 5.3.3 Setup Menu Screen ....................42 5.3.4 About Menu Screen ....................46 6. SASS/SuperSASS SYSTEMS Basic Operations ..................47 SASS/SuperSASS Distinctions ..............47 6.2.1 SASS Details ......................47 6.2.2 SuperSASS Details ....................49 Flow System ....................51 SASS/SuperSASS CONFIGURATION System Setup .....................
- Page 5 Additional Error Correction Instructions ............73 9.7.1 Link Down Error ....................... 73 10. DATA RETRIEVAL 10.1 USB Memory Device ................... 74 10.2 FSCommAQ Software ................. 75 11. SPARE PARTS and ACCESSORIES 11.1 Consumables, Replacement Parts, and Accessories ........76 SASS-9805 REV A Page 3...
- Page 6 Figure 4-12 Sharp Cut Cyclone Parts Diagram ..............27 Figure 4-13 Penetration Curve, Sharp-Cut Cyclone (diam. 2.141mm) ....... 28 Figure 4-14 Expected Configuration of SASS Canisters ............. 29 Figure 4-15 Control Unit Mounting ..................30 Figure 4-16 Control Unit Mounting Detail ................30 Figure 4-17 SuperSASS Vacuum Hose connections .............
- Page 7 Figure 5-13 Restart System Screen ..................40 Figure 5-14 Shut Down System Screen ................. 40 Figure 5-15 Test Menu ......................41 Figure 5-16 System Test Screen (SASS) ................41 Figure 5-17 Temperature Calibration Screen ................ 41 Figure 5-18 Pressure Sensor Calibration Screen ..............42 Figure 5-19 Clow Calibrate Screen ..................
- Page 8 Figure 9-4 Pressure Calibrate Screen .................. 69 Figure 9-5 Flow Calibrate Screen ..................70 Figure 9-6 Clear Memory Screen ................... 71 Figure 9-7 Link Down Screen ....................73 Figure 10-1 Copy to USB Storage Device ................74 Page 6 SASS-9805 REV A...
- Page 9 Table 1-1 Specifications ......................11 Table 4-1 Denuder Performance Test Results ..............24 Table 5-1 SASS/SuperSASS Menu Hierarchy ............... 34 Table 5-2 Main Display Parameter Descriptions ..............36 Table 9-1 Recommended Maintenance Schedule for the SASS/SuperSASS Sampler ..63 SASS-9805 REV A Page 7...
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Page 10: Introduction
The term SASS will be used in this manual to identify basic concepts used for both the SASS and the SuperSASS. The term SuperSASS will be used to identify features or details specific to the SuperSASS. -
Page 11: Sass/Supersass Ambient Chemical Speciation Sampler
SASS/SuperSASS Ambient Chemical Speciation Sampler Figure 1-1 SASS/SuperSASS *Sampling head, tripod, control box, ambient temp sensor and vacuum pump box. SASS-9805 REV A Page 9... -
Page 12: Sass/Supersass Overview
1-3. These studies have shown that other sampling techniques are required for analyzing the different chemical constituents of PM2.5. Met One Instruments, Inc. has worked closely with the US-EPA and potential end users to develop the SASS and the SuperSASS to comply with government regulations and incorporate features that the end user will likely find desirable. -
Page 13: Sass/Supersass Specifications
One or two in series Ambient Temperature: (-30 to 50°C) Bead thermistor in naturally aspirated radiation shield (-30 to 50°C) bead thermocouple at inlet for canister 1 (SASS) Filter Temperature: (-30 to 50°C) bead thermocouple at inlet of each canister (SuperSASS) Ambient Temp., °C (-30 to 50) - Page 14 * The approximate upper concentration limit is based on the sampler’s ability to maintain 16.67 L/min sample flow over the entire 24- hour period, despite PTFE filter loading with typical urban PM particulate. Actual concentration limits will vary depending on ambient conditions, altitude, and particulate type. Specifications may be subject to change without notice. Page 12 SASS-9805 REV A...
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Page 15: Site Selection And Positioning Criteria
2. SITE SELECTION and POSITIONING CRITERIA Met One Instruments, Inc. recommends checking local regulations and guidance documentation before selecting the site to install the SASS/SuperSASS. For example, US-EPA provides a variety of guidance documents where site selection issues are addressed. Such guidance and regulation may provide information concerning: •... -
Page 16: Setup
It is recommended to document and photograph all damaged packages and items before, during, and after unpacking them. Contact Met One Instruments to arrange for any replacement items needed. • Carefully unpack items from the box. -
Page 17: Shipment Contents
MgO-coated denuder (8382): SASS (1); SuperSASS (2) One cassette transport case (8460) One tool kit (8629) The standard components for the SASS/SuperSASS are shown in Figure 3-1 SASS Standard Accessories Optional Accessories The following optional accessories may be purchased separately:... -
Page 18: Figure 3-1 Sass Standard Accessories
Figure 3-1 SASS Standard Accessories Figure 3-2 SASS Tool Kit Page 16 SASS-9805 REV A... -
Page 19: Electrical Service
The supplied power must be rated for the electrical load and appropriately configured for an outdoor application. Consult a qualified electrical contractor. See Table 1-1 for electrical specifications. SASS-9805 REV A Page 17... -
Page 20: Assembly And Deployment
4. ASSEMBLY and DEPLOYMENT The SASS/SuperSASS design allows for easy setup and deployment for long or short- term sampling applications. The following sections in Chapter 4, "ASSEMBLY and DEPLOYMENT," explain setup procedures and proper system configuration for the SASS and SuperSASS. -
Page 21: Tripod Assembly
If the sampling site is on the ground, drive spikes through the tripod mounting feet. If cement or other hard material is present on the sampling site surface, commercial hardware must be used to properly secure the tripod. SASS-9805 REV A Page 19... -
Page 22: Sass Sampling Head Assembly And Mounting
The bottom shield must be set in place before any socket head cap screws can be installed. Remove the Sass sampling head from the shipping materials. The sampling head assembly shown in (Figure 4-5) consists of: •... -
Page 23: Figure 4-5 Sampling Head
Tighten the two factory-installed setscrews located in the sampling head hub to secure sampling head to mast. A bundle of black sample hoses and one electrical cable should be protruding from tripod mast base. SASS-9805 REV A Page 21... -
Page 24: Figure 4-7 Sharp-Cut Cyclone And Canister
Figure 4-7 Sharp-Cut Cyclone and Canister Provides PM cut point, inverted canister within canister assembly block. Page 22 SASS-9805 REV A... -
Page 25: Filter Canister Assembly And Installation
The filter medium is selected to adsorb vapor from subsequent volatilization of collected particles. The SASS nitric acid denuder is a hexagonal, aluminum cell coated with magnesium oxide. There are approximately 350 hexagonal channels with each channel approximately... -
Page 26: Table 4-1 Denuder Performance Test Results
MgO particles from the denuder is likely to occur. Tests also confirm 100% penetration of both liquid and solid particles in the size range tested. Nitric acid collection efficiency of the SASS denuder was measured in the laboratory using a permeation tube source diluted with purified (ammonia-free) laboratory air and a catalyst- equipped chemiluminescent nitrogen oxide analyzer detector. -
Page 27: Figure 4-9 Sample Canister Assembly (Pn 8370)
Figure 4-9 Sample Canister Assembly (PN 8370) SASS-9805 REV A Page 25... -
Page 28: Sharp Cut Cyclone (Scc)
4.3.2 Sharp Cut Cyclone (SCC) The SASS inlet selectively transmits airborne particles according to PM criteria. After exiting the inlet tube, aerosol moves cyclonically within the body of the cyclone where larger particles are transported, due to inertia, against the outer wall. The unique... -
Page 29: Figure 4-12 Sharp Cut Cyclone Parts Diagram
Figure 4-12 Sharp Cut Cyclone Parts Diagram SASS-9805 REV A Page 27... -
Page 30: Figure 4-13 Penetration Curve, Sharp-Cut Cyclone (Diam. 2.141Mm)
Figure 4-13 Penetration Curve, Sharp-Cut Cyclone (diam. 2.141mm) Page 28 SASS-9805 REV A... -
Page 31: Filter Media
In this way, it can accommodate new denuder filter methods as they are established. The SASS can be used for organic sampling in any configuration (Figure 4-14). All include an MgO-coated aluminum denuder, two Teflon filters, one for mass and metals analysis, and one for inorganic ion analysis. -
Page 32: Control Box Mounting
Control Box Mounting The SASS control unit is a weather resistant, environmentally sound enclosure. The control unit houses a microprocessor, touch-screen display, USB port, Ethernet port, and power connection. The SASS control unit is designed for angle mounting on the tripod for ease of operation and readability. -
Page 33: Ambient Temperature Sensor Mounting
Ambient Temperature Sensor Mounting The SASS includes a passive ambient temperature sensor using a thermistor protected by several round plates. The shield is naturally aspirated, allowing for an accurate temperature measurement. The ambient sensor assebly includes a Model 074 temperature shield, Model 065 temperature sensor, tripod mounting hardware, and cable with connectors. -
Page 34: Vacuum Hose Connections
4.7.1 Vacuum Hose Connections Locate and identify sample hoses hanging from the base of the tripod mast. The SASS will have five hoses, the SuperSASS will have Eight hoses. All hoses are labeled with a number located half an inch from the male quick connector. Match the hose number to the female fitting number located just above the fitting. -
Page 35: Cable Connections
With all cables connected, black zip-tie wraps can be used to secure cables to a tripod leg. Natural or nylon tie wraps will break down in direct sunlight and will be prone to breakage. The SASS includes five sample channels, and the SuperSASS includes eight potential sample channels. -
Page 36: User Interface And Menu System
User Interface – Touchscreen Display Functions The SASS/SuperSASS user interface is a touchscreen display It is mounted inside the control box enclosure and is only accessible when the door of the SASS control box is open. Menu Hierarchy and Navigation The SASS/SuperSASS menu structure is outlined in the following table. - Page 37 No sub menu control box serial number, and display version. Menu selections and instructions are detailed in the following sections of this operating manual as assigned in the Main Menu column of Table 5-1 above. SASS-9805 REV A Page 35...
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Page 38: Home Screen(S)
The Home or main operating screen is designed to provide the current status of the sampler and any programmed events. Figure 5-1 Main Screen For SASS/SuperSASSillustrates the home screens for the SASS and SuperSASS. The up and down arrow keys are used to navigate between the various screens showing current data. -
Page 39: Figure 5-3 Setup Menu
The ABC key , also in the lower right-hand corner, performs the function of a SHIFT key. It toggles between upper-case and lower-case letters and allows the numbers across the top to switch to special characters such as the dollar sign, asterisk, or ampersand. SASS-9805 REV A Page 37... -
Page 40: Menus
The Operate Menu is the doorway to the most commonly used areas for normal operation of the SASS/SuperSASS. Note that the appearance of the menu changes slightly when a sample event is in progress, as shown in the right-hand image of Figure 5-7 The Operate Menu. -
Page 41: Figure 5-10 Transfer Data Screen
The Control box software can be updated in the Upgrade Software screen. Connect a USB storage device with correct upgrade software to the control box USB port. Figure 5-12 illustrates the upgrade screen with latest software. Figure 5-12 Upgrade Software Screen SASS-9805 REV A Page 39... -
Page 42: Figure 5-13 Restart System Screen
Shutdown System Screen Selecting Shut Down will prompt a warning message shown in Figure 5-14. Select YES to turn the system off, select NO to return to the Operate Menu. Figure 5-14 Shut Down System Screen Page 40 SASS-9805 REV A... -
Page 43: Test Menu
5.3.2.2 Temperature Calibrate Screen The Temperature calibration screen is used to calibrate the temperature monitoring system of the SASS. Select the temperature sensor that requires calibration using the Temperature Sensor dropdown. The name will either be listed as “AT” for the outside ambient temperature sensor or “FT1”... -
Page 44: Setup Menu Screen
Setup Menu in detail and should be reviewed when the instrument is first put into service. Once set, most of the values in the Setup Menus will not need to be changed. The Setup Menu values will not be lost if the SASS is unplugged or powered down. Figure 5-20 Test Menu... -
Page 45: Figure 5-21 Event Defaults Screen
To clear the logged data, press the CLEAR button. This function should only be used when all data in the SASS has been collected and archived on other media such as a PC Computer. See section 9.5 for details. -
Page 46: Figure 5-24 Notification Configuration Screen
Figure 5-25 Logging Screen pressing the EXPORT button. 5.3.3.6 Setup Display Screen This screen allows for adjustments to be made to the display brightness. Figure 5-26 Setup Display Page 44 SASS-9805 REV A... -
Page 47: Figure 5-27 Clock Screen
5.3.3.8 Unit ID Screen Users may enter a Unit ID number up to three digits long for the SASS. Press the green bordered value box and the numerical entry keypad will be displayed. Enter the new Unit ID value. This ID number will be included in the data reports. -
Page 48: About Menu Screen
Ethernet Screen This screen allows for setting/viewing the IP Address, Subnet Mask, and Gateway, and DNS Server values to allow the SASS to communicate on a local area network using a standard Ethernet cable connected to a switch or router. See section 7.2.1 for more details. -
Page 49: Sass/Supersass Systems
5. Airflow exits the canister, through the sample tubing into the pump box, through the flow control system, through the pump, and is exhausted through a muffler, located inside the pump box. SASS/SuperSASS Distinctions This section describes the differences and system functions of the SASS and SuperSASS systems. 6.2.1 SASS Details The SASS has five sample channels. -
Page 50: Figure 6-1 Sass Flow Diagram
Figure 6-1 SASS Flow Diagram Solar radiation shield, sample canisters, ambient temperature sensor, control box, and pump box. Page 48 SASS-9805 REV A... -
Page 51: Supersass Details
Every flow channel has a black tube that runs from the SASS head, through the tripod mast, to the pump box. All flow channels have a designated quick connect point and shut off solenoid at the pump box. -
Page 52: Figure 6-2 Supersass Flow Diagram
Figure 6-2 SuperSASS Flow Diagram Solar radiation shield, sample canisters, ambient temperature sensor, control box, and pump box. Page 50 SASS-9805 REV A... -
Page 53: Flow System
Canisters may be equipped with a denuder ahead of the filter to remove selected gaseous compounds. The SASS flow system is shown in Figure 6-1 and Figure 6-2. Individual flow lines lead from each sampling canister to the pump box mounted on the ground. The flow from each canister enters a volumetric flow controller. -
Page 54: Sass/Supersass Configuration
7. SASS/SuperSASS CONFIGURATION The sections below explain the process for configuring the SASS/SuperSASS for operation. System Setup This section explains the items in the Setup Menu and how to program the SASS/SuperSASS system for operation. 7.1.1 Clock Setup Setting the system clock is vital for proper operation because this controls scheduled events. -
Page 55: Communication Configuration
Communication Configuration The SASS/SuperSASS can be set up to send notifications over a network connection if available at the sample site. This section describes the procedures for setting up ethernet communications, notifications, and remote access to the system. 7.2.1 Ethernet Setup... -
Page 56: Notifications
Recipients can choose to receive email or text SMS notifications. Select the box outlined in green to the right of “Type”. A drop down will appear with “Email” or “Text”. When the desired communication type is selected, simply input the email address or phone number and press save. Page 54 SASS-9805 REV A... -
Page 57: Sass/Supersass Operation
This section explains how to schedule events, transfer, and view data, update the system software and toggle power for the SASS/SuperSASS. IMPORTANT: The SASS/SuperSASS system is sold calibrated, but is it recommended to audit the flow before deployment. Event Manager As stated in section 5.3.1.2, the event manager screen is used to add new events, modify... -
Page 58: Modifying Sample Events
Canister Set setting. Canisters can be grouped into sets depending on how many will be used during the sample event. {1,2,3,4,5 for SASS and, SuperSASS will add canisters 6,7,8}. Figure 8-4 Canister Set Dropdown Pressing the Next button on the bottom... -
Page 59: Importing Sample Events
This schedule can then be saved to a USB storage device and loaded into the SASS sampler instead of manually configuring each event through the front panel display of the sampler. Note that the event schedule must be configured to match the serial number of the sampler. -
Page 60: Historical Events
• Screen navigation arrows (up and down) move between the nine event subjects. Events Record Return to Operate Menu Number Event Navigation: Event Navigation: Screen Past Events Recent Events Navigation Figure 8-7 Historical Events Main NOTE: Navigation in Historical Events remains the same for every screen. Page 58 SASS-9805 REV A... -
Page 61: Figure 8-8 Volume Summary
Figure 8-8 Volume Summary Figure 8-9 Min/Max (1) Figure 8-11 Max Delta-T Figure 8-10 Min/Max (2) Figure 8-12 Warnings Figure 8-13 Power Interruption Figure 8-14 Real Time Values Figure 8-15 5-Minute Averages SASS-9805 REV A Page 59... -
Page 62: System On/Off Options
Press the Yes button to continue with the shutdown. Press the No button to abort this action and return to the Operate screen. Figure 8-17 Shutdown Screen Page 60 SASS-9805 REV A... -
Page 63: Data Transfer
8.2.3.1 Remote Access Data stored in the SASS system can be downloaded remotely when a network connection is established using FSComAQ software. The software can be accessed at metone.com and downloaded onto a computer. See section 5.3.3.11 for details on setting up Remote access. -
Page 64: Maintenance And Troubleshooting
The TEST menu functions are also described in this section. Little maintenance is required for the operation of the SASS Sampler System. The following procedures should be followed for reliable continuous operation of the system. -
Page 65: Recommended Periodic Maintenance Table
Recommended Periodic Maintenance Table Table 9-1 shows the recommended interval for the regular maintenance, field checks, and service tasks. Table 9-1 Recommended Maintenance Schedule for the SASS/SuperSASS Sampler Maintenance Item Period Monthly Leak Check Monthly Flow system check/audit. Monthly Ambient and flow temperature sensor check/audit Clean PM cyclone particle trap. -
Page 66: System Inspection (During Normal Operations)
9.2.2 System Cleaning Dirt buildup on the SASS head radiation shield can reduce effectiveness of the reflective surface and cause the temperature to rise inside the shield. A wet cloth or, if required, a diluted soap and water solution can be used to clean buildup on most surfaces. When the system canisters are replaced (as deemed necessary), inspect the sampler head solar radiation shield for excessive buildup. -
Page 67: System Test/Leak Check
Operational life expectancy of the MgO coated aluminum Denuder is six months in an urban airshed like Los Angeles. Re-coating of the material is not practical nor recommended. The Met One Instruments MgO Coating Procedure for replacement denuder material is detailed below. NOTE: Users should consult the factory for the correct coating process. -
Page 68: System Leak Check Procedure
(check to see if the O-rings are in good condition). The other possibility is that the canister is not correctly assembled and a leakage path around the two sections of the canister exists. A 0.0 LPM reading would indicate the problem is in the cyclone. Page 66 SASS-9805 REV A... -
Page 69: Calibration Procedures
This now verifies that the vacuum system is intact, and everything is working correctly. Calibration Procedures The calibration procedure performed in the field for the SASS is flow rate measurement, filter temperature, ambient temperature, and barometric pressure measurement. Using a set of NIST traceable standards, for volumetric flow, barometric pressure and temperature, the SASS unit can be easily calibrated using the calibration screens in the Test Menu of the SASS Control Unit. -
Page 70: Figure 9-3 3 Point Temp Calibration Screen
When the probes are stable, enter the value measured from the reference temperature sensor in the bottom Reference window. Press the CALIBRATE button on the bottom right of the screen. 5. Change the Set Point to Hot. Page 68 SASS-9805 REV A... -
Page 71: Pressure Calibration
Pressure Calibration The Pressure Calibrate screen provides the calibration screen for the calibration of the pressure sensor in the SASS unit. The pressure is used by the flow monitoring system to determine the volumetric flow from the measured mass flow sensors. -
Page 72: Flow Audit And Calibration
It is recommended that the SASS pump be run for approximately 20 minutes to allow the flow system to reach operating temperature before performing a flow calibration. -
Page 73: Flow Sensor Replacement
PC Computer using FSCommAQ software. Figure 9-6 Clear Memory Screen IMPORTANT: It is recommended to clear the SASS memory after data is transferred or downloaded to an external storage device or local network. SASS-9805 REV A... -
Page 74: Basic Problem And Cause/Solution Table
Check all of the push-in air fittings throughout the air flow system. • Problem: The clock settings are lost when the SASS is powered down. Cause/Solution: There is a lithium coin cell battery inside the mass monitor that maintains •... -
Page 75: Additional Error Correction Instructions
Additional Error Correction Instructions 9.7.1 Link Down Error Error occurs when communication is lost with pump box. Warning may resolve itself. If the warning continues, consult Met One Instruments service department. Figure 9-7 Link Down Screen SASS-9805 REV A Page 73... -
Page 76: 10. Data Retrieval
The following sections explain the process and tools required to retrieve data from the SASS. The SASS can copy data files directly to a user-supplied USB storage device. The SASS control box can be connected to a local network via an ethernet cable to download data using Met One Instruments FSComAQ software. -
Page 77: 10.2 Fscommaq Software
Software version 1.4.11 or higher must be used with SASS systems. Data retrieved from the SASS can be viewed and converted to .csv or .txt file format using the FSCommAQ software package. The FSCommAQ software package can be used to create a full event schedule on a computer. -
Page 78: 11. Spare Parts And Accessories
The following parts are available from Met One Instruments for maintenance, replacement, service, and upgrades. If unsure about a part, please contact the Service department and provide the serial number of all applicable SASS components. Some of these parts require technical skills or special considerations before use or installation. - Page 79 SCC Grit Pot (Cap) 8664 Internal Temperature Sensor, SASS Head 8877 Solenoid Valve Assy (Sample Flow Line Select) 8893 Solenoid Valve Assy (SASS Pump Bypass 8894 Flow Controller Assembly 9053 Pump Box Circuit Board Stack – SuperSASS 80474 Switching 12V Power Supply, Universal Input...
- Page 80 Calibration Tools Description Part Number Field Temperature Calibrator 9099 Flow Calibration Meter SWIFT 25.0 Page 78 SASS-9805 REV A...
- Page 81 Fan filters clean: as left found particle trap clean: as left found drip jar empty: as left found bug screen clear: as left found particle trap clean: as left found Pump muffler unclogged as left found SASS-9805 REV A Page 79...
- Page 82 Error Date Time Error Date Time Audit Notes: Page 80 SASS-9805 REV A...
- Page 83 Manual Notes: SASS-9805 REV A Page 81...
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