CASES97: Logbook Entries

CASES97: Site 7 Messages, 51 Entries..

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Entry Date Title Site Author #Graphics
263 Tue 24-Jun-1997PAR sensors at site s77Delany, Tony
262 Wed 04-Jun-1997Plumbing delay times for O3 Meyers and CO2 Licor7Delany, Tony
261 Wed 28-May-1997Post-CASES97 inspection of chem and rad7Delany, Tony
252 Wed 21-May-1997final IC's done on station 77Knudson, Kurt
250 Wed 21-May-1997site 7 gps survey done7Knudson, Kurt
246 Wed 21-May-1997Cosmos restarted7Militzer, John
244 Tue 20-May-1997Licor CO2/Chem sensor problems7Militzer, John
239 Tue 20-May-1997Cosmos restarted7Militzer, John
237 Mon 19-May-1997Seclod zeroed and Target swap7Militzer, John
235 Mon 19-May-1997zero seclod7Paradox Log
228 Mon 19-May-1997cosmos and marigold reboots7Horst, Tom
227 Sun 18-May-1997Cosmos analog channels not reporting7Horst, Tom
224 Sun 18-May-1997Cosmos rebooted7Horst, Tom
223 Sat 17-May-1997Cosmos restarted7Militzer, John
221 Sat 17-May-1997Serviced o3.meyers and co2.licor7Horst, Tom
217 Fri 16-May-1997Rebooted cosmos & marigold7Horst, Tom
211 Wed 14-May-1997Seclod Zero and Target7Jirak, Cathy
209 Wed 14-May-1997Rebooted cosmos7Horst, Tom
206 Tue 13-May-1997Rebooted cosmos7Horst, Tom
198 Mon 12-May-1997ICs, micky in rain gauge. bug eggs on bottom rnet.7Paradox Log
196 Sun 11-May-1997Changed SECLOD target7Horst, Tom
194 Sun 11-May-1997Seclod zero7Militzer, John
189 Fri 9-May-1997Routine7Paradox Log
175 Tue 6-May-1997Routine7Paradox Log
169 Mon 05-May-1997Zeroed SECLOD7Michaelis, Matt
166 Mon 05-May-1997Rebooted cosmos7Horst, Tom
160 Sat 3-May-1997Routine7Paradox Log
139 Wed 30-Apr-1997Restarted CO2 pump yesterday afternoon.7Horst, Tom
134 Wed 30-Apr-1997ozone targets replaced7Oncley, Steve
130 Mon 28-Apr-1997ozone sensors have old targets7Oncley, Steve
129 Mon 28-Apr-1997licor pump off again/soda lime refreshed7Oncley, Steve
124 Mon 28-Apr-1997licor replumbed/seclod zero7Oncley, Steve
95 Thu 24-Apr-1997Campbell loggers at 7 and 87Semmer, Steve
93 Thu 24-Apr-1997Power status at station 77Semmer, Steve
92 Wed 23-Apr-1997changed p and tsurf channels7Oncley, Steve
89 Wed 23-Apr-1997Zero.chem programming7Oncley, Steve
88 Wed 23-Apr-1997Care and Feeding of Meyers Ozone Sensor7Delany, Tony
87 Wed 23-Apr-1997Care and Feeding of the Licor CO2 Sensor.7Delany, Tony
85 Wed 23-Apr-1997Care and Feeding of SECL7Delany, Tony
84 Wed 23-Apr-1997Care and Feeding of the ThermoElectron Ozone detector7Delany, Tony
81 Wed 23-Apr-1997An RF primer7Oncley, Steve
77 Tue 22-Apr-1997vegguie removed from #77Oncley, Steve
69 Mon 21-Apr-1997Installation and Testing of SECLOD7Delany, Tony
67 Mon 21-Apr-1997Zero.chem programming7Oncley, Steve
66 Mon 21-Apr-1997Cosmos went down last night, back up7Semmer, Steve
65 Sun 20-Apr-1997modified ophier calib routine7Oncley, Steve
54 Sat 19-Apr-1997PAR sensors7Delany, Tony
52 Sat 19-Apr-1997ophirs moved7Oncley, Steve
46 Fri 18-Apr-1997Cal factors for 4-comp rad array7Delany, Tony
45 Fri 18-Apr-1997Set-up Chemical Sensors7Delany, Tony
6 Wed 02-Apr-1997check of filter/amp board in cosmos7Maclean, Gordon


263: RAD, Site 7, Tue 24-Jun-1997 17:41:16 GMT, PAR sensors at site s7
The Photosynthetically Active Radiation, PAR, or Quantum sensors
used during CASES97 were deployed only at the Super-Site, s7.

Three PAR sensors borrowed from NOAA were mounted on the dark
horse at s7. One was used to monitor incoming PAR,one was used to measure
outgoing PAR, and one was kept as a spare 

All sites, including s7in had Licor solar incoming radiation
sensors, soldn, and it is intended to define a ratio

                        PAR/soldn

for s7 and then to use soldn at all other sites to obtain
the respective PAR's.

The two NOAA sensors used both were connected via 604 ohm adapters:

rad.par.in 
 NOAA S/N Q22668, cal date 3 Sept''96
 -168.4 umol/m^2/s/uA with 604 ohm adaptor
        -168.4/604 = .2788 umol/m^2/s/uV
        cal factor:  .2788e6 umol/m^2/s/V
        
rad.par.out
  NOAA S/N Q22666, cal date 3 Sept''96 
 -181.8 umol/m^2/s/uA with 604 ohm adaptor
        -181.8/604 = .3010 umol/m^2/s/uV
        cal factor: .3010e6 umol/m^2/s/V
        
spare
  NOAA S/N Q22678, cal date 3 Sept''96
 -169.8 umole/m^2/s/uA with 604 ohm adaptor

PS added by Gordon Maclean, June 24:
A gain of 1000 was applied to these analog channels, which caused them
to saturate the +-5V AtoD during the day. (A gain of 100 would have been
a better choice).



262: CHEM, Site 7, Wed 04-Jun-1997 20:04:15 GMT, Plumbing delay times for O3 Meyers and CO2 Licor
In order to calculate fluxes the delay times for the chemical sensors
needed to be calculated.
For CASES97 the slight variation due to wind direction was not considered.

SECLOD was mounted immediatelty behind the sonic anemometer and a
delay time of zero was used.

For both Meyers and Licor the delay time were defined during high-wind
period when the flow was down the length of the boom. This condition
gives the tubing + sensor delay when the contribution of the
sonic anemometer to intake is at a minimum.

Cross corellation lag time ("o3.meyers.s7","w.s7") = 2.95 s
Cross corellation lag time ("co2.licor.s7","w.s7") = 1.20 s

These values are in rough agreement with the times calculated
from the flow rates of the sensors and the volume of the 25'tubing
Mass of water in 7.25' of tubing = 27.4 g
Mass of water in 25'   of tubing = 94.5 g
Volume of 25' of tubing = 94.5cc = 0.0945 l 

Delay time through tubing at 3 lpm (0.05 lps) = 0.0945/0.05 = 1.9 s for Meyers
Delay time through tubing at 7 lpm (0.12 lps) = 0.0945/0.12 = 0.8 s for Licor

261: CHEM, Site 7, Wed 28-May-1997 22:42:07 GMT, Post-CASES97 inspection of chem and rad
The equipment returned to NCAR and was unloaded on 27 May''97
I took the Chem Box and the Four component raiometer array
into the lab.

Powered-up the Chem Box:
 Teco: Air flow ~ 2 lpm, internal pump and solenoids could be heard operating
       The front panel came alive and settled down to give a reasonable value
       for inside air ~ 10 ppbv.

 Meyers: Air flow ~3 lpm, Internal pump could be heard. 

 Licor: The pump drew ~ 7 lpm. However the front display was dead.

 Gulp: Connected output to chart recorder. Ran for two hours: no change
       in output. The program is dead.


 Radiometer array: Domes all look clean. Cables disconnected from patch box
                   The 12 VDC fan operated on test

ADDED 6 June''97
    On 3 Jun''97 removed Meyers from chem-box and tested on bench. Functions OK
    On 5 Jun''97 removed Licor from Chem-box and tested on bench. Front panel 
      display active. Zeroing works and sensor responded to hurrs  





252: VISIT_LOG, Site 7, Wed 21-May-1997 23:34:46 GMT, final IC's done on station 7
Final IC Taken

the ati sonic was zeroed as follows	'w' vector	start	19:30:30
							stop	19:40:00
					'u' vector	start	19:53:02
							stop 	20:05:00
					'v' vector	start	19:40:30
							stop	19:53:00

barometer IC:	GMT		Paro	Cosmos:127 (Vaisala PTB427)
		19:43:00	978.75	978.7	
		19:43:30	978.76	978.7
		19:44:00	978.72	978.8

rain IC: start	19:45:00
	 stop	20:23:00	1/2 tip left in bucket

Asssman IC
	time		tdry	twet	%rh	T	RH
	19:48:00	22.1	14.7	44.6	22.14	45.23
	19:48:30	22.4	15.4	47.6	22.27	54.93
	19:49:00	22.3	15.2	46.8	22.32	47.78	
	19:49:30	22.3	14.8	40.7	22.28	49.1
	19:50:00	22.4	15.3	46.9	22.38	52.12
	19:50:30	22.2	14.8	44.7	22.32	45.69
	19:51:00	22.3	15.25	47.1	22.35	44
	19:51:30	22.2	15.0	46.0	22.29	47.57
	19:52:00	22.1	14.8	45.2	22.23	48.18
	19:52:30	22.2	15.1	46.7	22.26	49.3
	---------	-----		----	-----	-----
	Averages	22.25		45.63	22.28	48.39

ophir fast h2o sensor	mirror center to 'w' vector 78.0 cm
			mirror to ground 3.09 meters

trime moisture	20:09:35	29.9%	33.0 tdr level
		20:10:00	29.9%	32.0 tdr level
		20:10:30	29.8%	32.0 tdr level




250: , Site 7, Wed 21-May-1997 23:14:58 GMT, site 7 gps survey done
a gps survey was done today at site 7 at 20:15.
the bottom of the gps antenna altitude is 10.0 cm above the port on the
barometer
246: ADAM, Site 7, Wed 21-May-1997 17:36:34 GMT, Cosmos restarted
Cosmos (Station 7): down from 02:40-16:20Z  (07:40-11:20 CDT)
A simple power cycle restarted it.
244: CHEM, Site 7, Tue 20-May-1997 23:13:47 GMT, Licor CO2/Chem sensor problems
The Licor CO2 sensor has been mostly down since the 17th although there
were some brief periods in which is was running.

It was brought back up: ~15:20 CDT, JD140, 20 May via simple power cycle.

NOTE the Gulp also appears to be down and not firing the solenoids to
zero the seclod, licor and meyers ozone.

Part of the outages were related to the Datel problems.
However, it appears that when the Sodalime and Ozone target change was done
on the 17th, the box A/C power cables may have been moved and then became
intermittent for at least the Licor if not the others.

This status of the chem. sensors needs to be investigated further
and fully reported.
239: ADAM, Site 7, Tue 20-May-1997 16:27:31 GMT, Cosmos restarted
Cosmos went down at about 00:30Z  (19:30 CDT, may 19th)
It was restarted at about 14:20Z  (09:20 CDT, may 20th)

This doesn't appear related to the temperature crashes with the
A/D board.  The internal box temp. was around 25-26 degrees all
afternoon.
237: CHEM, Site 7, Mon 19-May-1997 22:33:24 GMT, Seclod zeroed and Target swap
Zeroed seclod at 16:17:05 local (21:17:05 GMT) for 2 - minutes.
Replaced Target at 18:00 local:  removed GFAS3, installed ATDD3
235: VISIT_LOG, Site 7, Mon 19-May-1997 21:11 GMT, zero seclod
Site Visitation Log Entry
=========================

Tech: C
Weather: high cirrus cool and breezy
shoved seclod into helium balloon at  21:17:05
for 2:00
228: ADAM, Site 7, Mon 19-May-1997 14:03:19 GMT, cosmos and marigold reboots
Cosmos rebooted at 0600 GMT this morning.  Marigold also rebooted
several times during the night.
227: ADAM, Site 7, Sun 18-May-1997 22:24:57 GMT, Cosmos analog channels not reporting
At 1900 GMT, the analog channels on cosmos again stopped.  This occured
at the same adam temperature at which these channels quit yesterday.

After considering several remedial actions, decided to wait for cooler
weather predicted for tomorrow.
224: ADAM, Site 7, Sun 18-May-1997 16:17:45 GMT, Cosmos rebooted
Found this morning that the analog channels on cosmos quit reporting
around 2300 GMT yesterday.  Gordon suspects the Matrix board as the
cause of the problem.  John reseated all boards in cosmos and 
successfully rebooted around 1500 GMT this morning.  It is possible
that the problem is temperature related, since we are experiencing
higher daytime temperatures than previously during CASES97.
223: ADAM, Site 7, Sat 17-May-1997 22:42:17 GMT, Cosmos restarted
Cosmos was brought back up at about 22:20Z (15:20 CDT)

Analog data down from:	18:30Z (13:30 CDT)
All data down from:	19:30Z (14:30 CDT)

The Datel board hung for some reason.   After returning to the base and
discovering the problem, our first fix attempt was to reboot the
adam, but it failed to come up properly.  Subsequent reboot attempts
also failed.

A quick look in the $ASTER/log/asterlog but didn't reveal anything
obvious, however, it appeared that possibly the socket connection was
having difficulty getting re-established, although we didn't have the cosmos
console log to confirm that.
Meanwhile, the ppp service was OK per checking "ps -t term/1" and noting
the aspppls process was up.
A check of the "netstat -f inet" did show some TIME_WAIT connections,
so I finally took down the ingest process, restarted it and went out to
log the startup session on the adam.  Before rebooting, I left the adam
powered down for perhaps 1-2 minutes.   Upon power up, everything booted
normally and the turkey TIME_WAIT addresses apparently timed-out and clear
themselves so that we were left with just the
adam-ppp.8000 connects for marigold/cosmos on the socket addr 8000 as usual.





221: CHEM, Site 7, Sat 17-May-1997 16:56:13 GMT, Serviced o3.meyers and co2.licor
Changed the soda lime in the co2 scrubber and replaced the o3.meyers
target between 1100 and 1200 CDT today.
217: ADAM, Site 7, Fri 16-May-1997 14:52:43 GMT, Rebooted cosmos & marigold
Cosmos (7) quit at 0430 GMT, restarted at 0920 CDT
Marigold (8) quit at 0700 GMT, restarted at 0945 CDT
211: CHEM, Site 7, Wed 14-May-1997 22:22:46 GMT, Seclod Zero and Target
Zeroed seclod 17:36 local  
(This cannot be the right time, looks like 19:36 GMT, twh)
Removed target ATDD2 replaced with GFAS3 17:00 (CDT, twh)
replaced seclod 18:00





209: ADAM, Site 7, Wed 14-May-1997 17:40:24 GMT, Rebooted cosmos
Cosmos crashed around 1120 GMT this morning; rebooted at 1420.
206: ADAM, Site 7, Tue 13-May-1997 20:08:35 GMT, Rebooted cosmos
Cosmos stopped around 1430 GMT and I just noticed it.  Gordon thinks
that the failure was caused by a berserk print daemon on platypus.
Restarted cosmos around 2000 GMT.
198: VISIT_LOG, Site 7, Mon 12-May-1997 15:22 GMT, ICs, micky in rain gauge. bug eggs on bottom rnet.
Site Visitation Log Entry
=========================

Tech: CJ
Weather: Clear calm

Assman IC Record                Sampled at: 15:48
================

           ID      Tdry    rh      Twet    Pressure
Assman             14.54   37.5    8.10   
PAM Trh    4       14.01   38.2            976.0  

Samples: 11
Comments: clear lt. n. breeze


Soil Moisture IC Record                Sampled at: 15:48
=======================

     IC Reading:   31.90  
    PAM Reading:   3.57   
PAM raw Reading:   1.5400 

Comments: 5 min covar avg. q.soilx=35.76%


196: CHEM, Site 7, Sun 11-May-1997 21:32:58 GMT, Changed SECLOD target
Removed SECLOD from tower at 3:45 pm CDT
Replaced GFAS2 target with ATDD2
Replaced SECLOD on tower at 4:30 pm CDT

194: CHEM, Site 7, Sun 11-May-1997 15:10:25 GMT, Seclod zero
Zeroed SECLOD with helium balloon technique at 0944-0946 CDT.
189: VISIT_LOG, Site 7, Fri 9-May-1997 23:27 GMT, Routine
Site Visitation Log Entry
=========================

Tech: JM
Weather: clear, essentially calm for Kansas
Soil sample taken.  Very easy to insert starter probes in by hand...seems to be less dense soil.  Trime IC  30.8%  Will need to pull data off aster by hand later
175: VISIT_LOG, Site 7, Tue 6-May-1997 21:43 GMT, Routine
Site Visitation Log Entry
=========================

Tech: MM
Weather: breezy, clearing sw winds

Rain Gauge Check Record                Sampled at: 21:50
=======================

Gauge Type:  MRI  S/N:     Reading: 101     Expected: 100

Comments:  Rain results from Splus after test

Found mouse nest in rain gauge.  Two mice had set up house.  They left.
Trime: 1st = 26%, TDR=31;  2nd = 26.2 ,26.3

Did 100 tip rain test about 21:50

checked CR10--it is reporting each 2 seconds, and it totals rain properly.
(Did a manual 10 tip test to verify.  got 1,2,2,3,2 tips

169: CHEM, Site 7, Mon 05-May-1997 22:01:57 GMT, Zeroed SECLOD
Used a helium balloon to zero the SECLOD today at 21:49--21:50 GMT.
The zeroing may have been rather poor since a good deal of the helium
escaped in puncturing the balloon.



166: ADAM, Site 7, Mon 05-May-1997 14:46:38 GMT, Rebooted cosmos
Cosmos crashed around 0300 CDT.  Rebooted this morning around 9 am.
160: VISIT_LOG, Site 7, Sat 3-May-1997 15:36 GMT, Routine
Site Visitation Log Entry
=========================

Tech: EK
Weather: sunny and breezy

Station Service Performed
=========================
Mouse nesting

Sensor Maintenance Performed
============================
ASSMAN IC
Freewave bax had mousenest and mouse -evicted both
Baro tube chewed threw - repaired
freewave power cab;e munched - cut put bad section and reconnected
filled box holes as best as I could with brass scrubbers

baro   st7 981.7    ic 981.26

assman   tdry 13.6  twet  8.3

15:47:53.340       981.8:23         13:21      52.37:22          0:24
15:47:54.340       981.7:23      13.01:21      53.39:22          0:24
15:47:55.340       981.8:23         13:21      53.96:22          0:24
15:47:56.340       981.8:23         13:21      55.34:22          0:24


139: CHEM, Site 7, Wed 30-Apr-1997 20:56:50 GMT, Restarted CO2 pump yesterday afternoon.
Restarted CO2 pump around 1800-1830 CDT Tuesday afternoon.
134: CHEM, Site 7, Wed 30-Apr-1997 17:09:30 GMT, ozone targets replaced
We (finally) have replaced the targets for Meyers and Seclod.  
I deliberately didn't replace them just before the IOP on Monday
(which ended yesterday) in case they needed time to settle.

The Meyers target was yellowed (beige?).  We installed the
#2 target in its place.

Seclod still looked white, however there are bits (1mm^2) of
glass(?) shards which obviously have cracked off of the window
in front of the PMT.  I tried to shake most of the shards out,
and reinstalled the sensor with the new (ATDD#1) target.
130: CHEM, Site 7, Mon 28-Apr-1997 22:18:06 GMT, ozone sensors have old targets
Although Tony's schedule called for the ozone targets to be changed today,
I thought that I shouldn't do this just before an IC, on the theory that
it will take some time for them to equilabrate to outside conditions.
Since tomorrow continues the IOP, the next opportunity will be Wed.

129: CHEM, Site 7, Mon 28-Apr-1997 22:13:47 GMT, licor pump off again/soda lime refreshed
When I checked the pump at 4pm today (after it had been running since 10am),
it was pretty hot (though not as bad as yesterday).  I was going to leave it
going - perhaps outside the shelter to help it cool - but then started having
cosmos crashes.  On the outside chance that these crashes (now during IOP1)
were power related, I decided to leave the pump off.  

The licor is still on.  I also refreshed the soda lime. at this time.
124: CHEM, Site 7, Mon 28-Apr-1997 16:21:33 GMT, licor replumbed/seclod zero
After talking to Tony last night, I've replumbed the licor in a way which
should make the pump happy.  (The pump sucks on a T fitting which is connected
to the licor sample outlet and to an adjustable valve.)  I've set the flow
rate (at the inlet of the chem box) to 7 lpm.

While this was going on, I had "gulp" manually set to turn off the flow
on seclod from about 0950-1010 and printed this out for Tony.  It didn't
do a good zero.


95: RAD, Site 7, Thu 24-Apr-1997 16:28:19 GMT, Campbell loggers at 7 and 8
  The loggers at 7 and 8 where changed to an output rate
of 1 sec. Recycling power will set the loggers back to a
5 sec output rate. The change was made to clean up the
cockpit displays.


93: ADAM, Site 7, Thu 24-Apr-1997 15:02:33 GMT, Power status at station 7
 Over the last few days we have experience power problems
at site 7. It appears the AC units overload the line power
when they turn on. During one test the voltage drop to 75 volts
at site 7.
  Upon Kurt's recommendations, a couple of items have been done.
First, only the front AC unit will be operating. The back unit
will be left on but the thermostat will be set to minimum and
maximum levels. Each AC unit fan will be left running. The power
load from the chemistry equipment was transfer to the other leg
of the transformer. This will balance the load on the transformer.
  After the changes above, a test was run. The results were ok.
However, the pump in the chemistry shelter was not running. Upon
inspection, the pump motor had died. This may have been a factor
in the problems from the previous day.
  Throughout the night cosmos stayed up.

92: BARO, Site 7, Wed 23-Apr-1997 22:51:04 GMT, changed p and tsurf channels
I couldn't get channels 126 and 127 to report good data, which appears to
be related to removing the veggie meter yesterday.  As a stopgap measure,
I've moved these signals to 120 and 121 (since the UV sensor has not
arrived yet.)  This would require a change of ops to recover data from
the setup phase.

89: CHEM, Site 7, Wed 23-Apr-1997 18:43:39 GMT, Zero.chem programming
The commands for the HC11 to program "gulp" to generate zero.chem are:
(The laptop must be set to 1200 baud and connects to the cable on the bottom,
left of the shelter.)

TS (only if data are scrolling)
C
[RAM] A
[index:] 1
H39 600 (sets 60 seconds with solenoids on)
[index:] 2
H00 17400 (sets 1740 seconds = 29 minutes with solenoids off)
[index:] 3
END
[index:] 

(repeat this for RAM B:)

C
[RAM] B
[index:] 1
H39 600
[index:] 2
H00 17400
[index:] 3
END
[index:] 

E


88: CHEM, Site 7, Wed 23-Apr-1997 18:43:18 GMT, Care and Feeding of Meyers Ozone Sensor
The Meyers O3 sensor uses a chemiluminescence target which reacts with Ozone
to produce light. The efficiency of the target decreases with time.
The target needs to be changed 

To change the target:
Slide the Ozone Sensor slightly foreward and open the lid.
Power down the Ozone Sensor by pulling apart the BLUE 12 VDC disconnect.
Unscrew the Al plug on the right hand end of the metal cylinder
Take the Al plug to the trailer.
Remove the previous target, replace the double sided sticky tape, lay the 
    new target on the plug face, store the old target in the envelope.
Return the Al plug, screw it in finger-tight and repower the sensor.


Once a week install a new target. I suggest:

          Target	 Install           Use

	  #1             18 April 1997     18 April - 28 April
	  #2             28 April 1997     28 April -  8 May
	  #3              8 May   1997      8 May   - 16 May
	  #4             16 May   1997     16 May   - 24 May


The instruction sheet and circuit diagrams for the Meyers Ozone Sensor are
in the chemistry drawer in the middle room of the base trailer. 
The targets are in a plastic bag in the plastic box in the chemistry drawer.





87: CHEM, Site 7, Wed 23-Apr-1997 18:42:49 GMT, Care and Feeding of the Licor CO2 Sensor.
The Licor sensor relies on a carbon vane pump in the Chem box to draw air
through the sensor at a high flow. The pump flow is indicated on the
floating ball guage in the top right of the front of the box. The flow 
should be between 5 - 7 lpm. There is an adjustment valve in the aft part of the box. It can be reached from the front.

The Licor CO2 sensor has a small lucite cylinder containing SodaLime.
This is to scrub CO2 from the sample after it passes through the sample
cell and before it passes through the zero cell. If the capacity of the
SodaLime to scrub CO2 from the air-stream is exceeded, then there is
no good zero for the differential optical measurement.

Once a week 
Power down the Licor
Open the back of the Chem Box
Detach the connector panel 
Remove the swagelok connectors for little lucite cylinder.
Dump out the old SodaLime and refill from the bottle.i
Refit the cylinder and tighten the swagelok connectors
Reassemble Chem Box
Restart Licor

A 9/16 wrench is required to undo and redo the Swagelok nut. Do not
over-tighten.
SodaLime is not toxic nor very corrosive and small amounts can be disposed
of in the garbage.
 
I suggest changing the SodaLime on the same day as changing the Meyers
ozone sensor target discs.

        20 April
        28 April
         8 May
        16 May




85: CHEM, Site 7, Wed 23-Apr-1997 17:24:07 GMT, Care and Feeding of SECL
The SECL ozone sensor uses a chemiluminescence target which reacts with
ozone to produce light. The efficiency of the target decreases with time
The target needs to be changed

Two different versions of target are being tested; the GFAS target
and the ATDD target. GFAS is more efficient but has a water interference.
ATDD is less efficient but may be free of the water effect.

To change the target:
   Select the replacement target from the box in the Chemistry Drawer
   Carry the target holder out to site7 in the little tupperware box
   Climb the tower, unplug the cable, carry SECL down.
   Remove the putty around the base of the intake (light leak prevention)
   Unscrew three screws around back edge
   Withdraw the entire sensor.
   Remove the Al sticky tape securing the target holder.
   (The target holder fits into the front top of the sensor)
   Remove old target holder, implace the new target holder
   Replace the Al sticky tape (maybe use fresh tape)
   Insert the sensor in the can, reapply the putty, reattach the back.
   Climb the tower and reattach to Velcro , recable.

I  would like the following schedule

   GFAS 1  23 Apr - 28 Apr
   ATDD 1  28 Apr -  3 May
   GFAS 2   3 May -  8 May
   ATDD 2   8 May - 13 May
   GFAS 3  13 May - 18 May
   ATDD 3  18 May - 23 May

(The actual change time should be noted in this logbook entry)

Zeroing of SECL.
The GULP microprocessor is set up to no-flow zero for 1 minute every 30 minutes.
(See logbook entry 83 , Zero chem programming)
I would like a zero-ozone zero for each new target.
A day after the new target is installed take a helium party balloon out to site.Bring SECL down, still attached to the cable. Rest SECL on the break-out box.
Make a small slit in the ballon with a razor or knife and insert SECL's intake.
Let SECL inhale Helium for a minute or so.
Return SECL to tower.
The slit can be sealed with tape and one balloon will do for two zeros 





84: CHEM, Site 7, Wed 23-Apr-1997 16:57:43 GMT, Care and Feeding of the ThermoElectron Ozone detector
The TECO operates continuously and rarely requires attention.
It may occasionally go into a state of microprocessor confusion when it
generates a hi-lo-hi-lo output.
Mostly it will cure itself . However if the condition persists for more than 
several hours the sensor should be switched off and after a minute, repowed.
81: RF_MODEMS, Site 7, Wed 23-Apr-1997 14:25:53 GMT, An RF primer
If an ADAM fails to boot at the very first step:
"attaching to network..." ...." Timeout "
The problem probably is that the "aspppls" process is not running.
Search for this process with:
"ps -t term/N", where N is 0 for marigold or 1 for cosmos
If it isn't there, it will restart if the modem carrier drops and is
brought back, which can be accomplished by cycling power to the freewave
at the site.  (Obviously, this can be done while in the field.)


77: RAD, Site 7, Tue 22-Apr-1997 16:04:52 GMT, vegguie removed from #7
Since Bob Grossman thinks the veggiemeter should be at the grassland site
(#8), I have just removed it from #7.  I'll reconfigure "ops1" now.

69: CHEM, Site 7, Mon 21-Apr-1997 17:11:31 GMT, Installation and Testing of SECLOD
The Chemical Box was addressed on Friday 18 April 97.
It was hauled into the trailer and put into order. Intakes, power
 data connections were made and Tecod, Licor CO2 and Meyers O3 were operated.

The GULP microprocessor was reprogrammed by Steve O.

On Saturday, 19 Apr,  the other sensors were ready and in the afternoon SECL
was addressed.
Test points for HV input were installed. (1 VDC = -250 VDC)
An ATTD target was installed.
Twenty hopkalite screens were inserted into the killer cartridge.
The reversing fan sucessfully operated and the flow through
the newly installed hopkalite screen tube was checked. The question of flow
obstruction by the screens was left till the sensor was running.
The output remained constant at ~ 1.3 indicating that the electronics
were not operating properly.
A -12VDC supply was wired into the system.

On Sunday, 20 Apr, the sensor was run with the extra -12VDC. Exposing the intake
to direct sun gave a response indicating that the PMT and amplifier
were working.
The HV was increased from -750 VDC to -1150 VDC and the sensor run outside.
Still no good.
The ATTD target was replaced by a GFAS target and the sensor run outside.
Steve O reprogrammed GULP.
At ~ 1500 the sensor began to respond.

The Chemical sensors, in their box were deployed and started up at ~1700.
The outputs were ragged but basically OK.

At 1830 CDT the HV of SECLOD was decreased to -1100 VDC.

On Monday, 21 Apr, the chemical sensor data was examined.
SECLOD had settled down and the spectral responses od SECLOD and Meyers
were compared. 
At 11:48 CDT the GFAS target was replaced with the ATTD target.
At ~17:15-17:45 SECL was brought into the Base and the entire killer cartridge
 was removed. SECL was reinstalled.

 FINDINGS
SECL works more or less the same as during FLATLAND96

The reversing fan system works
Twenty Hopkalite screens in the cartridge doesnt significantly decrease flow
       but there is breakthrough with only ~ 30% ? destruction.
With no killer cartridge the reverse flow is 10% ? low but variance smoothed.

Both ATDD and GFAS targets work but GFAS is ~4X higher luminescent

On Tuesday, 22 Apr, at 9:45 did a bag zero using a garbasge bag of base air into which Hopkalite was added.
At 10:55 SECL removed from tower. 20 screen cartridge removed (had it not been removed the previous eve?),  
  and a 5cm of Hopkalite killer cartridge was added. SECL replaced on tower at 11:50
At 13:30 SECL intake inserted in Hopkalite containing zero bag
	possibility of contamination of sensor
At 15:04 did He zero 

At 15:10 SECL and GULP removed to base. SECL cartridge removed entirely, sensor cleaned. GULP relays
   reconfigured for 59 min of fan sample, 1 min of fan off (rather than 59 min aample 1 min reverse)
At 16:00 Restored on tower, It was confirmed that the fan did stop for 1 min.

















67: CHEM, Site 7, Mon 21-Apr-1997 15:20:02 GMT, Zero.chem programming
The commands for the HC11 to program "gulp" to generate zero.chem are:
(The laptop must be set to 1200 baud and connects to the cable on the bottom,
left of the shelter.)

TS (only if data are scrolling)
C
[RAM] A
[index:] 1
H39 600 (sets 60 seconds with solenoids on)
[index:] 2
H00 17400 (sets 1740 seconds = 29 minutes with solenoids off)
[index:] 3
END
[index:] 

(repeat this for RAM B:)

C
[RAM] B
[index:] 1
H39 600
[index:] 2
H00 17400
[index:] 3
END
[index:] 

E


66: ADAM, Site 7, Mon 21-Apr-1997 14:25:29 GMT, Cosmos went down last night, back up
Cosmos went down last night. Mxreset and recycling
power did not get it back up. Had to cycle power on
the freewaves.

65: FASTH2O, Site 7, Sun 20-Apr-1997 19:52:49 GMT, modified ophier calib routine
I've noticed that the ophir data from site 7 (the only ophir so far) have had
a lot of spikes.  They are of two types: zero values and double values.
I've isolated the double value glitches to an occasional "stuck bit" in
the reference measurement, with values off by 256 counts.

I've added simple despiking of this channel into the ophir calibration
routine which appears to fix this problem, though I haven't tested it
through zero values.

54: RAD, Site 7, Sat 19-Apr-1997 19:33:06 GMT, PAR sensors
Photosynthetically-Active Radiation

There are two PAR sensors at site 7, mounted on the cross beam of the
radiation stand. They are on the upper and lower surfaces of a set of  plates.

  Sensor     Serial#   Cal date         Multiplier    Units

  par.in     Q22668    03 Sept''96      -168.4        umol. s-1. m-2 / uA

  par.out    Q22666    03 Sept''96      -181.8        umol. s-1. m-2 / uA


  The wheat rows do not run North-South but rather about 20 degrees to the west
  of South



52: FASTH2O, Site 7, Sat 19-Apr-1997 17:02:51 GMT, ophirs moved
the ophirs at sites 7 and 8 were moved closer to the tower along their
booms.  This was done to reduce the moment for wind loading of the towers
(they were swaying a lot yesterday) and to reduce the blockage for N winds.

They are now about 70cm to the NE of the sonic arrays.

46: RAD, Site 7, Fri 18-Apr-1997 18:34:35 GMT, Cal factors for 4-comp rad array
The cal factors for the piranometers and pyrgeometers deployed at super site
as components of the four component radiometer array.

NB The ASTER pyg.out was broken. It is replaced by another pyrgeometer with
only a single dome thermister. As the pyg.out dome is not subjected to
direct solar heating the single dome thermister is adequate.

	   Radiometer       Serial #       Date of cal    Calfactor uV/Wm-2

           ASTER psp.in     26214          8/92           8.57 

           ASTER psp.out    26226          8/92           8.63 

           ASTER pyg.in     29260          9/92           3.56 (3.27 after mod?) 
           L6    pyg.out    29137          4/92           4.05 






45: CHEM, Site 7, Fri 18-Apr-1997 16:22:48 GMT, Set-up Chemical Sensors
Brought the chem-box into the trailer and checked out the sensors.
Using the three 8 m lengths of teflon 1/4" tubing drew air in from outside.
With power off inserted fresh target in Meyers fast ozone sensor

Teco ozone: looks OK, showing approximately 55 ppbv

Meyers ozone: output voltage ~ 1.7 VDC with fast variability that showed 
	      a decrease when Kurt blew cigarette breathe over intake.

Licor carbon dioxide: output voltage ~ 1.7 VDC with fast variability that
		      showed increase when Kurt blew tobacco breathe over
		      intake

Zero indicator: the Zero indicator shows a response but Gulp requires
		reprogramming



6: ADAM, Site 7, Wed 02-Apr-1997 14:27:47 GMT, check of filter/amp board in cosmos
Used the Datel voltage source to check the amplifier/filter cards
in cosmos.

The only suspect one is channel 102, to be used for the TECO.



port    gain    offset                  inputV  measV
100     1.      0.  # licor co2         .5      .4998+-.0002
101     1.      0.  # licor t           .5      .4997+-.0003
102     1.      -5. # TECO O3           .5      .4953+-.0002    .0045 low
                                        1       .9935+-.0002    .0065 low
103     1.      0.  # zero chem         .5      .4997+-.0003
104     1.      0.  # Meyers O3         .5      .5000+-.0002
105     1.      0.  # SECLOD O3         .5      .4997+-.0003
106     1.      0.  # vais baro         .5      .4997+-.0002
107     1.      0.  # T.adam            .5      .4998+-.0002
108     200.    0.  # pyg.in            .01     .01002+-.00002
109     2.      -5. # case              1       .9970+-.0002
110     2.      -5. # dome              1       .9971+-.0002
111     2.      -5. # comp              1       .9981+-.0002
112     200.    0.  # pyg.out           .01     .01002+-.00002
113     2.      -5. # case              1       .9977+-.0002
114     2.      -5. # dome              1       .9983+-.0002
115     2.      -5. # comp              1       .9986+-.0002
116     200.    0.  # psp.in            .01     .01002+-.00002
117     200.    0.  # psp.out           .01     .01002+-.00002
118     1000.   0.  # rad.par.in        1 mv    1.047+-.003 mv
119     1000.   0.  # rad.par.out       1 mv    1.043+-.003 mv
120     1.      0.  # rad.uvb           1       .9992+-.0003
121     1.      0.  # t.uvb             1       .9993+-.0003
122     1.      0.  # rad.uv            1       .9990+-.0002
123     1.      0.  # 660.veg           1       .9986+-.0002
124     1.      0.  # 730.veg           1       .9985+-.0002
125     1.      0.  # Tsurf             1       .9988+-.0002