CO2 nephelometer span checks
A.1  Plumbing

A.2  Setup
a.	Connect CO2 tank, regulator, critical orifice, rotameter, copper tubing.  Don’t connect to nephelometer yet.
b.	Turn on CO2 flow; set regulator to 25 psi.
c.	Flush tubing for 5 minutes, and then close CO2 tank valve.
d.	Connect tubing to Swagelok union on blue filter.  Connect other side of blue filter to ¼” Swagelok port on nephelometer.
A.3  Operation
a.	Open CO2 tank valve
b.	Press <Esc> INC to begin span check
c.	The computer will notify you when the span check is over and display the calibration results.
d.	Repeat the span check if the average deviation is more than 2%
e.	Close CO2 tank valve when done.
A.4  Frequency
Perform a CO2 span check at the start of the field program, at the end of the field program and twice weekly during the field program.

B.	Computer Operation
1.	Setup
a.	Connect power brick to wall outlet and rear of PC
Connect PCMCIA cable adapters to PCMCIS cards (labeled “UPPER PORT” and “LOWER PORT”)
Connect data cables from instruments to PC
COM1  (rear panel) – data output from CMDL system
COM2  (PCMCIA upper right) -- MAC-1050 A/D I/O card
COM3  (PCMCIA upper left)  -- TSI nephelometer
COM4  (PCMCIA lower right) – CNC
COM5  (PCMCIA upper left) – CLAP
2.	Startup
a.	Turn on PC (white switch on left side)
b.	After boot-up, you should see 3 objects on the OS/2 desktop
i.	Control Center along bottom of screen
ii.	Launch Pad along right edge of screen
iii.	“CP” window immediately left of Launch Pad (if you don’t see it, left-click “CP” icon on Launch pad)
c.	Left double-click “Aerosol Data Logger” icon in the CP window to startup data logging program.  Left double-click title bar to maximize window.
d.	Shutdown
a.	Exit aerosol data log (<Esc> Q)
b.	Right-click on blank area of OS/2 desktop
c.	Press “D” or left-click on “Shut-down”
d.	Turn off power (white switch on left side)
C.	Archiving and Backing-up Data
1.	If up-to-the-minute data are desired, press <Esc> OS in Aerosol Data Logger to close current files and start new files
2.	Activate “CP” window (left-click in window, or left-click on “CP” icon in Launch Pad)
3.	Double-click “Archive Data” icon.  This saves the raw (binary) data in E:\cp\archive\rYYMMDDx.zip.  It also converts the binary data to plain ASCKK and stores them in E:\cp\archive\tYYMMDDx.zip (the ‘x’ is a code for the current hour of the day).
4.	Backup to floppy.
a.	A copy of the ‘tYYMMDDx.zip’ file is saved in the “2floppy” folder in the “CP” folder
b.	Double-click on the “2floppy” folder to open it
c.	Drag (RMB) all files in “2floppy” folder to floppy icon on Launch Pad
d.	Delete items in “2floppy” folder after you have copied them to floppy.  Drag (RMB) files to Shredder icon on Launch Pad to do this.
5.	Quick-look plots
a)	The data archives are standard “ZIP” format
b)	The data files are plain ASCII, tab-delimited, with headers
c)	“A*.TXT contain 1-minute averages.  “M*.TXT” contain snapshots (every 22.5 minutes) of system status info.
D.	Aerosol Data Logger Program
1.	Press <Esc> to access menus, <Esc> to abort from any menu or entry box without any changes, <Enter> to accept the current entry or highlighted item.
2.	Menu entries can be selected with the arrow keys or pressing the boldface shortcut key for the desired selection.
3.	The program will request an access code if you select a menu item that will result in a change to the data being logged to disk, in order to prevent inadvertent changes.  The access code is ‘CMDL’ (lowercase).
4.	The “base” display consists of three lines at the top for error messages, a status line at the bottom, and central window for displaying current values for ambient measurements.  Status windows for specific windows can be displayed (or hidden) by pressing <Alt> plus the code letter for that instrument.
A = Aerosol system
B = Best UPS
L = CLAP
N = Nephelometer
U = MAC-1050 A/D I/O system
5.	The bottom status line gives the status of filter sampling (left side), the free disk space and system clock (right side), and a status code for active instruments (center).  Lowercase code letters mean that instrument is not logging data, uppercase letters means logging is enabled for that instrument.  If a letter is absent, then that instrument is not present or not responding.  Normal operation is indicated by the code *ABcLMNu which is interpreted as follows:
*-- data from enabled instruments is being logged (if absent, no data are being logged)
A – aerosol data system active and logging enabled
B – Best UPS active and logging enabled
C – CN contamination control algorithm active (not logged)
L – CLAP active and logging enabled
M – system monitor file logging (always present)
N – nephelometer active and logging enabled
u -- MAC1050 A/D I/O subsystem active, but not logging (if uppercase, raw voltage are being logged, which can quickly generate huge files).
6.	Main Menu
Pressing <Esc> brings up the main menu, with the following choices (shortcut keys underlined):
Message Log – allows the user to make an entry in the system log file.  Think of this as an on-line logbook, and use it liberally.  Each entry can be at most 80 characters long, and each entry is recorded with a time stamp.
New Average – force termination of the current average and start a new average
Instruments – activates the instrument control menu
Options – actives the options menu
Quit – exits the program.
7.	Instruments Menu
Aerosol monitor – activates menu for aerosol system control functions
Nephelometer – activates nephelometer control menu
CLAP – activates CLAP control menu
uMAC-1050 – activates the MAC-1050 control menu
Best UPS – activated Best UPS control menu
Humidograph – activates humidograph control menu
Each of the instrument control menus have the same top two lines, which toggle the state of data logging and window visibility for that instrument.  The other entries are specific to that instrument.
8.	Aerosol Monitor Menu
Logging end  —— disables logging of aerosol parameters
Logging start — changes to “logging start” if logging is disabled
Window hide    —— changes visibility of status window
Window unhide — <AH>=A is a shortcut for this function.
Filter change – notify system that the filters will be changed.  Terminated filter sampling.  Changes to “Filter start” when changing.
Filters bypass    —— context-sensitive function 
Filters unbypass —   to bypass/unbypass the filters
Analyzers bypass    —— context-sensitive function to 
Analyzers unbypass —   bypass/unbypass the continuous analyzers
Purge blower on    —— context-sensitive function to toggle
Purge blower off   —   the state of the purge blower
9.  Nephelometer Menu
Logging start (end)
Window hide (unhide)
Span Check       —— context-sensitive menu to start/abort
Abort Span Check —   a CO2 span check.
Send command – Activates a menu for sending selected commands to the nephelometer.  Not normally used except for troubleshooting.
10.	 CLAP Menu
Logging start (end)
Window hide (unhide)
Start filter change —— Context-sensitive menu to start/end a filter
End filter change —   change.  Use this function to prevent data logging during a CLAP filter change.
11.  System configuration information is stored in the CP.INI file, located in the same directory as the CP.EXE executable.  These are the only two files required by the aerosol data logger program.
E.	Changing CLAP Filter
1.	All necessary supplies are in a plastic box labeled “CLAP filters and cleaning supplies”.
2.	In the Aerosol Data Logger window, press <Esc>ILF to signal start of a filter change.
3.	Unscrew the black knob on the sampling head, raise the lockdown panel, and remove the filter holder.
4.	Replace the filters (it may not be necessary to replace the right-hand [reference] filter each time).  The white side of the filter should be facing up.
5.	Re-insert the filter holder into the sampling head; secure the lockdown panel with the black knob.  Make sure the lower lip of the lockdown panel goes under the bottom edge of the sampling head.
6.	Press the “RESET Transmittance” switch up, verify that Tr+1.000 on the front panel of the CLAP.
7.	Press <Esc> ILF to signal end of the filter change.  Verify Transmittance_1.000 before answering the “Y” when asked, “Have you pressed the RESET Transmittance switch?”
8.	Change the filter whenever the transmittance drops below 0.7.  Normal flow rate is 2.0 lpm, but you can decrease this down to as low as 0.5 lpm if the filters load up too quickly.  This will increase the instrument noise level, however.
F.	Changing Impactor Foils
1.	The first stage of the 10-m impactor is a greased cup that removes everything larger than 12 m.  Clean it with ethanol and a tissue, and then regrease it with a layer of high vacuum grease using a cotton-tip swab.
2.	The plastic films in the 10-m and 1-m impactors are sprayed with a thin film of silicone spray on the side facing the impactor jets.
3.	Change films every 2-3 days or more frequently if large particle deposits are observed.
4.	Clean the internal surfaces with ethanol as needed. 
5.	Before removing the impactors, press <Esc> IAA to close the solenoid valve, thereby notifying the computer that the analyzers are off-line.  Be sure to press <Esc> IAA again when the impactors have been re-installed, to resume data logging.
6.	Immediately after the servicing is complete, and you have pressed <Esc> IAA, start a nephelometer zero cycle by pressing <Esc> INSZ.
G.	Changing Nephelometer Lamp
Verify that the nephelometer lamp is lit once daily.  Detailed instructions are given in the manual.
H.	Heater Control
If the pump fails, the heater could overheat because the PID sensors don’t have flow past them.  There is a high-temperature cut out switch on the heater, but as a safety measure, you should turn off the heater control switch if the pump is turned off.
I.	Electrical Safety
There is 110VAC on exposed screw terminals inside the rack.  These terminals have been covered with black electrical tape, but you should always remove power from the rack when working inside it.
J.	CNC Butanol
1.	Do not fill above the line by the sight glass
2.	Be sure to drain the CNC completely before shipping
K.	Power Draw
The pump alone draws 5.2A at 115VAC.  The remaining equipment draws 1.6-2.0A.
L.	System Clock
The system clock is displayed in the lower right corner of the Aerosol Data Logger window.  To change the time, right-click on the System Clock icon in the CP folder, and left-click on the “settings” entry.  This brings up a dialog box where you can set the clock.  Left-click on the “x” button in the title bar when done.
Note:  This system always runs on UTC.