ENA/OZONE/C1 - Failing pump

The pump was failing, and the operator attempted a repair.  Eventually, the flow bypassed 
the pump internally and was replaced with an external HTDMA vacuum pump.  Data appear 
valid since the flow only affects the internal calibration source and not the ambient 
measurement.

Internal pump was repaired on 2016-09-20 11:00.  The flow returned to the nominal value 
decreased slightly).  The response to calibration increased proportionally (as expected 
given the lower flow rate and longer residence time in the O3 generator cell).  The 
instrument response to ambient O3 should not be a function of the flow rate.  HOWEVER, a slight 
discontinuity was noted in the ambient O3 values prior to this DQR and following this DQR 
end date.  The amount of uncertainty was judged as <5 ppbv.

• Ozone pressure(ozone_pressure)
• ozone_bench_temp
• Ozone concentration(ozone)

ENA/TRACEGAS/C1 - Flow meters not operating

Flow meters were not operating so that there were no standard adds for calibration.

• Nitrous oxide (N2O) mixing ratio corrected for water vapor concentration and
  calculated with nominal sensitivity correction(n2o_dry)
• Carbon monoxide (CO) mixing ratio corrected for water vapor concentration and
  calculated with nominal sensitivity correction(co_dry)
• N2O mole fraction of during batch measurement(n2o)
• Calculated CO concentration(co)

ENA/OZONE/C1 - Water condensing in the line

Instrument suffered major oscillations in the signal.  Working with Operator it was 
discovered that the Split System Air Conditioner was blowing directly on the Ozone detector.  
Water was condensing in the line.  The air was redirected and the temperature setpoint 
raised.  This reduced but didn't entirely eliminate the oscillations.

• Ozone pressure(ozone_pressure)
• ozone_bench_temp
• Ozone concentration(ozone)