20200630 Monthly site visit (refer to notes)

Notes

-Sample filters on NO, NOx, NOy, CO and O3 were replaced on today 6/30/2020
-Rain gauge is free of debri
-Anemometer propellor rotating smoothly

-NOy converter temperature: 320 deg C 
-Small tree at front of trailer were cut 
-Dangling copper wire at front of trailer was affixed to trailer with metal conduit and grounded to ground
-Found condensation inside ozone and CO sample lines; they were flushed with zero air and insulated with pipe insulation cylindrical strips

NO, NOx, NOy, O3, O3 and CO instrument diagnostics

NO sample flow: 0.939 l/min
NO ozonator flow: ok 
NO cell pressure: 240.6 mm Hg
NO PMT temperature: -2.5 deg C
NO PMT voltage: -906 V
NO alarms: Converter temperature (NA)
NO internal temperature: 31.9 deg C

NO chamber temperature: 51 deg C

NOx sample flow: 0.923 l/min
NOx ozonator flow: (was not recorded) 
NOx cell pressure: 94.6 mm Hg
NOx PMT temperature: -2.5 deg C
NOx PMT voltage: -807 V
NOx alarms: Converter temperature (NA); Pressure low; Sample flow high
NOx internal temperature: 29.5 deg C

NOx chamber temperature: 51 deg C

NOy sample flow: 1.376 l/min
NOy ozonator flow: ok
NOy cell pressure: 267.9 mm Hg
NOy PMT temperature: -2.3 deg C
NOy PMT voltage: -821 V
NOy alarms: Converter temperature (NA); Sample flow high
NOy internal temperature: 29.5 deg C

NOy chamber temperature: 51 deg C

O3 sample flow: cell A  1.507 l/min (bad sensor - overscale); cell B  0.666 l/min

O3 pressure: 731.1 mm Hg

O3 intensities: cell A 48,679 Hz; cell B 35,314 Hz

O3 alarms: Flow A high; Intensity B low (Range 45,000-150,000 Hz)

O3 lamp temperature.: 67.4 deg C

O3 bench lamp temperature: 53.3 deg C

O3 bench temperature: 53.3 deg C

CO sample flow: 0.599 l/min
CO pressure: 738.7 mm Hg
CO alarms: none

CO S/R ratio: 1.1553200

CO AGC intensity: 198,473 Hz
CO Bias voltage: -110.3 V
CO chamber temperature.: 48.2 deg C

CO bench temperature.: 40.4 deg C

CALIBRATION/SPAN CYLINDER PRESSURES (replaced NO cylinder with MAQL multi-blend cylinder)
NO cylinder pressure: 850 psi     NO cylinder outflow pressure: 30 psi
NO2 cylinder pressure 1550 psi:     NO2 cylinder outflow pressure: 35 psi
CO cylinder pressure: 1750 psi     CO cylinder outflow pressure: 40 psi
CO2 cylinder pressure: 2000 psi     CO cylinder outflow pressure: 25 psi

20200624 Turned off the internal autozeroing on CO instrument

20200615 CO_004 replaced SN0511911627 (refer to notes)

-Instrument (sn 0511911627) will be taken to lab for additional troubleshooting

20200615 Installed CO_004 for intercomparison

-CO_004 has sn 0710120759

20200610 Troubleshooting CO (refer to notes)

- Measured CO sample flow at instrument with BIOS 425 sccm; at inlet sample flow measured 415 sccm
- Calibrated MFCs inside Thermo calibrator with BIOS
-Fed 478 ppbc of CO from cylinder #CC328460; response was ~446 ppbv

20200603 Performed quarterly calibration

20200601 Replaced NOy instrument PMT thermocooler

20200525 Monthly site visit (refer to notes)

Notes

Sample filters on NO, NOx, NOy, CO and O3 were replaced on today 5/25/2020
Rain gauge cleaned of debri
Anemometer propellor rotating smoothly

NOy converter temperature: 320 deg C 
Work orders were submitted to remove small tree in front of trailer and fix earth ground copper wire that got damaged by lawn mowers

NO, NOx, NOy, O3, O3 and CO instrument diagnostics

NO sample flow: 0.951 l/min
NO ozonator flow: ok 
NO cell pressure: 240.2 mm Hg
NO PMT temperature: -2.4 deg C
NO PMT voltage: -905 V
NO alarms: Converter temperature (NA)

NO chamber temperature: xx deg C

NOx sample flow: 0.929 l/min
NOx ozonator flow: ok 
NOx cell pressure: 94.6 mm Hg
NOx PMT temperature: -2.5 deg C
NOx PMT voltage: -807 V
NOx alarms: Converter temperature (NA); Pressure low; Sample flow high

NOx chamber temperature: xx deg C

NOy sample flow: 1.384 l/min
NOy cell pressure: 268.9 mm Hg
NOy PMT temperature: -1.0 deg C
NOx PMT voltage: -821 V
NOy alarms: Converter temperature (NA); Sample flow high 

NOx chamber temperature: xx deg C

O3 sample flow: cell A - 1.507 l/min (bad sensor - overscale); cell B - 0.704 l/min
O3 pressure: 748.7 mm Hg
O3 intensities: cell A 48,998 Hz; cell B 36,179 Hz
O3 alarms: Flow A high; Intensity B low 38,120Hz (Range 45,000-150,000 Hz)
O3 lamp temp.: xx deg C

CO sample flow: 0.507 l/min
CO pressure: 739.3 mm Hg
CO alarms: none

CO S/R ratio: 1.163866

CO AGC intensity: 198,707 Hz
CO Bias voltage: -110.0 V
CO Chamber temp.: 46.2 deg C

CALIBRATION/SPAN CYLINDER PRESSURES (replaced NO cylinder with MAQL multi-blend cylinder)
NO cylinder pressure: 890 psi     NO cylinder outflow pressure: 30 psi
NO2 cylinder pressure 1650 psi:     NO2 cylinder outflow pressure: 41 psi
CO cylinder pressure: 1750 psi     CO cylinder outflow pressure: 41 psi
CO2 cylinder pressure: 2000 psi     CO cylinder outflow pressure: 22 psi

20200525 Replaced CO IR source

20200514 Changed NOxy slopes (refer to notes)

- slopes for NO, NOx and NOy were changed ; the slopes were changed as follows: NO 0.655, NOx 2.847, NOy 1.795
-MAQL multiblend cylinder was used to perform multipont calibration yesterday
- " " " will be left at site until new the a new [NO] gas cylinder refilled by Praxair
- only multipoint calibrations will be performed with MAQL calibration cylinder to conserva calibration gas

20200513 Installed MAQL cal cylinder and multipoint calibrated NOxy (refer to notes)

- also removed single gas [NO] cylinder and took it to 403; tank was drained for packaging because it will be shipped to get refilled

20200417 Monthly & weekly Check (refer to notes)

Notes

Sample filters on NO, NOx, NOy, CO and O3 were replaced on 4/3/2020
Rain gauge cleaned of debri
Anemometer propellor rotating smoothly

NOy converter temperature: 320 deg C 

NO, NOx, NOy, O3, O3 and CO instrument diagnostics

NO sample flow: 0.956 l/min 
NO cell pressure: 204/263 mm Hg
NO PMT temperature: -2.4 deg C
NO PMT voltage: -905 V
NO alarms: Converter temperature (NA)

NO chamber temperature: 50.7 deg C

NOx sample flow: 0.536 l/min 
NOx cell pressure: 221.5 mm Hg
NOx PMT temperature: -2.4 deg C
NOx PMT voltage: -807 V
NOx alarms: Converter temperature (NA)

NOx chamber temperature: 50.9 deg C

NOy sample flow: 1.391 l/min
NOy cell pressure: 269 mm Hg
NOy PMT temperature: -1.4 deg C
NOx PMT voltage: -821 V
NOy alarms: Converter temperature (NA); Sample flow high 

NOx chamber temperature: 50 deg C

O3 sample flow: cell A - 1.507 l/min; cell B - 0.683 l/min
O3 pressure: 734.7 mm Hg
O3 instensities: cell A 49,819; cell B 38,131
O3 alarms: Flow A high; Intensity B low 38,120Hz (Range 45,000-150,000 Hz)

CO sample flow: 0.511 l/min
CO pressure: 745.9 mm Hg
CO alarms: none

CO S/R ratio: 1.165681

CO AGC intensity: 199,308 Hz

CALIBRATION/SPAN CYLINDER PRESSURES
NO cylinder pressure: 250 psi     NO cylinder outflow pressure: 48 psi
NO2 cylinder pressure 1600 psi:     NO2 cylinder outflow pressure: 34 psi
CO cylinder pressure: 1750 psi     CO cylinder outflow pressure: 42 psi
CO2 cylinder pressure: 1600 psi     CO cylinder outflow pressure: 22 psi

20200403 Replaced one side of BLC lamps and changed all sample filters (refer to notes)

- Ran Windows updates
- Removed and replaced velcro that was holding power strip inside inlet box
- Removed electrical tape that covers relay terminals and power supply terminals; it was replaced with moisture sealing electrical tape (rubber)

2020031 Replaced NOx instrument prereactor valve and performed multipoint calibrations with NO and NO2

20200327 Fixed "corrupted" Loggernet software

20200325 Updated the slopes on NO and NOy instruments (refer to notes)

- changed the slopes on the NO and NOy instruments using site NO gas cylinder standard
- NOx was instrument is still not operating; half of BLC lamps not working; it needs to be replaced
- NOx instrument flow is very low (~150 cc/min) and pressure is also very low ~80 mm Hg; The autozero valve likely causing the problem
- No troubleshooting can be performed at site until Harris County restrictions are uplifted due to Corona virus

20200324 Troubleshooting NOx instrument (refer to notes)

- installed external vacuum pump; pump is from El Paso NOx instrument
- one side of BLC lamp needs to be replaced due to bad female plug on lamp
- replaced ozonator capillary on NOx instrument
- washed inlet filter guards (NOxy, CO and O3)

2020024 Troubleshooting NOx instrument (refer to notes)

20200317 Turned on NO, NOx, NOy, O3, and CO instruments

20200109 Site Visit

NO flow:
NO pressure:
NO PMT temp:
NO alarms:
NOx Flow:
NOx pressure:
NOx PMT temperature:
NOx alarms:
O3 flow:
O3 pressure:
O3 alarms:
NO2 flow:
NO2 pressure:
NO2 PMT temp:
NO2 alarms
CO flow:
CO pressure:
CO alarms: none
NO high: 0     NO low: 20
NO2 high: 1550     NO2 low: 34
Co2 High: 780        CO2 low: 52
CO high: 650    CO low: 40

took inventory of instruments and gases