- 26: CO2, Site stn2_central, Mon 07-Oct-2002 09:47:22 MDT, Final Intercomparison using Brittscal
9/26/02 INTERCOMPARISON SYSTEM FIELD NOTES
Sean Burns took these data.
Tank Pressures with Valves
Cylinder Closed Open
-------- ------- -----
A 1200 1200
B 1320 1350
C 0 1250
D 1600 1600
System Time* Event IC Gas Line
------ -------- ------------- -------- ------
NCAR-A 14:24:45 Connect to LiCorA -- Hydra was on S5
NCAR-A 14:25:30 step 4-way A
NCAR-A 14:28:30 step 4-way B
NCAR-A 14:31:30 step 4-way C
NCAR-A 14:34:30 step 4-way D
NCAR-A 14:37:30 3-way back to hydra hydra on S6.
NCAR-B 14:41:02 3-way to ICS -
NCAR-B 14:41:30 step 4-way A
NCAR-B 14:45:00 step 4-way B
NCAR-B 14:48:00 step 4-way C
NCAR-B 14:51:00 step 4-way D
NCAR-B 14:54:00 3-way back hydra on ?
Time Check: at 14:38:46 switch from s6-s7
Note: Hydra Cal was just finishing as i arrived (~14:20).
-------
USGS Time Check-- 14:20:00 USGS = 15:20:04 (watch time, which was
about 3 sec behind GPS time)
USGS 15:17:20 3-way to ICS on L5, P~509 torr
USGS 15:18:30 run start A P?, CO2~431.1
USGS 15:21:34 step 4-way B P~546 torr, CO2~403.8
USGS 15:24:34 step 4-way C P~518 torr, CO2~389.5
USGS 15:27:34 step 4-way D P~450, CO2~457.0
USGS 15:28:30 still on D --> increased P to be near 515 torr.
USGS 15:31:34 3-way back USGS Time=14:06:01 on L7
CU 16:09:40 to man, C2 on L4
CU 16:11:24 3-way to ICS
CU 16:12:00 step 4-way A (P~8 psi)
CU 16:16:00 step 4-way B (P~12 psi)
CU 16:20:00 step 4-way C (P~24 psi)
CU 16:24:00 step 4-way D (P~18 psi)
CU 16:25:23 still on D, increased P to 20 psi.
CU 16:28:00 step 4-way A
CU 16:30:00 step 4-way B
CU 16:32:00 step 4-way C
CU 16:36:00 3-way back to CU
CU 16:37:15 C2 on, to auto L1
Time Check: at 16:38:24 switch from L2-L3
*times shown are from my watch which is off from GPS by about
3-4 seconds...ie, GPS= 19:41:00, watch=19:41:03.
--------------------------------
All the tank pressures and flows on the Hydra looked fine.
...all the Britt intercomparison details are also posted on the MMM niwot
ridge webpage under "Project Timeline and Updates". ie,
http://www.mmm.ucar.edu/abl/forest/
- 25: CO2, Site stn2_central, Mon 23-Sep-2002 11:32:02 MDT, LICOR INTERCOMPARISON SYSTEM
9/19/02 INTERCOMPARISON SYSTEM FIELD NOTES
Sean Burns took these data.
Tank Pressures with Valves
Cylinder Closed Open
-------- ------- -----
A 0 1250
B 1400 1490
C 0 1300
D 0 1610
System Time* Event IC Gas Line
------ -------- ------------- -------- ------
CU 15:00:28 to man, C2 on L1
CU 15:02:01 3-way to ICS
CU 15:02:35 step 4-way A (P~4 psi)
CU 15:05:00 step 4-way B (P~12 psi)
CU 15:07:30 step 4-way C (P~20 psi)
CU 15:11:00 step 4-way D (P~20 psi)
CU 15:14:30 3-way back to CU
CU 15:16:00 C2 on, to auto L4
USGS 15:33:30 3-way to ICS USGS Time=14:33:30 on L10
USGS 15:33:40 run start A P~4, CO2~429.7
USGS 15:37:00 step 4-way B P~4, CO2~404.4
USGS 15:40:00 step 4-way C P~10, CO2~390.1
USGS 15:43:00 step 4-way D P~6, CO2~450.9
USGS 15:46:01 3-way back USGS Time=14:06:01 on L7
NCAR-A 16:22:30 Connect to LiCorA -- Hydra was on S4
NCAR-A 16:23:30 step 4-way A
NCAR-A 16:27:00 step 4-way B
NCAR-A 16:29:30 step 4-way C
NCAR-A 16:32:00 step 4-way D
NCAR-A 16:35:00 3-way back to hydra hydra on S2 (?).
NCAR-B 16:37:00 3-way to ICS A hydra on S6.
NCAR-B 16:38:00 step 4-way A (slight pressure adjust)
NCAR-B 16:41:00 step 4-way B
NCAR-B 16:43:30 step 4-way C
NCAR-B 16:46:00 step 4-way D
NCAR-B 16:48:30 3-way back hydra on S4
Time Check: at 17:00:03 switch from s4-s5
at 17:01:23 switch from s5-s6
*times shown are from my watch which has been adjusted to be within
1 sec of GPS time.
--------------------------------
- 23: CO2, Site stn2_central, Tue 17-Sep-2002 09:15:27 MDT, Hydra Check list
HYDRA CHECK LIST
Both RAA Gast pumps operating?
Dryer pump operating?
All aspiration floating balls between 6 and 6.5?. If not then adjust.
Note cylinder pressure and regulator pressure
Ref (eg 1750/4.9)
Cal 2 (eg 1560/5.9)
Spare Ref capped
Cal 3 (eg 1830/6.2)
Cal 1 (eg 1760/6.1)
Hydra box: open top and watch the little lights to see that the cycle is
progressing properly:
... cal3, cal2, cal1, Sample/s9,s8,s7,s6,s5,s4,s3,s2,s1, cal3, cal2, etc ...
Look at flow tubes on inside of door. Note values and,if necessary,adjust knob
below guage to set at correct value.
Look at pressure at pump output. Note value and, if necessary, adjust the knob
on the pressure controller T'd with the pressure guage.
Licor 1: Dry air = (should be 65 )
Ref = (should be 5 )
sample/cal = (should be 66 )
P (when in sample mode) = (should be 6.0 )
Licor 2: Dry air = (should be 65 )
Ref = (should be 5 )
sample/cal = (should be 66 )
P (when in sample mode) = (should be 6.0 )
Both tubes of desiccant. Blue OK, If totally pink, replace.
Undertake a Brittcal on both Licors.
Keep track of the "Sample" / "Calibration" sequence.
Fit each entire Brittcal into a single "Sample" period as overlapping with a
"Calibration" causes some problems.
- 19: CO2, Site stn2_central, Thu 12-Sep-2002 16:17:51 MDT, Cal cycle change
Gordon changed the calibration period and duration and the reset interval
At 14:19:
the calibration period was changed from every 30 min to every 60 min.
the calibration durations were changed from 2 min to 4 min the reset interval was changed from every 2.5 hrs to 5 hrs.
These changes do not modify the total cycle time of 1 hour.
At 16:15 this was checked back at FLAB and seen to be so.
- 18: CO2, Site stn2_central, Thu 12-Sep-2002 11:44:39 MDT, Hydra visit and Check list
Steve O and Tony D arrived at the NCAR tower at 11:30
RAA aspiration, all balls between 6 and 6.5
Cal2 valved off 1560/ 19 psi
Ref 1740/5 psi
The new AC cal valves had been plumbed in the day before but not electrically.
At 11:54 AC to all black relays off. (AC to Opto22 left on)
Electrical reconnection (pink relays replaced by black, DC jumpers removed,
AC jumpers installed, TM10 wiring to Licor box barrier strips disconnected,
New valve wiring connected to barrier strips) completed and AC power restored
at 12:45.
12:24 Licor 1 P = 5.8 sample/cal = 65
Licor 2 P = 5.0 sample/cal = 65
13:15 Licor 1 Britt-cal CalA regulator adjusted to bring Britts intake P to 5.8
CalB ditto
CalC ditto
CalD ditto
13:35 Licor 2 Britt-cal CalA regulator adjusted to bring Britts intake P to 5.0
CalB ditto
CalC ditto
CalD ditto
Note the Britt-cal for Licor 2 interupted by Cal cycle. Extended Britt-cal
14:02 Filled descicator tubes with blue Dryrite, powered pump and adjusted
dry air flows to 6 for both Licors
Finished removing all the ss nipples on front of intake filters.
14:32 Returned from last of filter nipple removals
CHECK LIST
Both RAA Gast pumps OK
Dryer pump OK
All aspiration floating balls between 6 and 6.5
Ref 1750/4.9
Cal 2 1560/5.9
Spare Ref capped
Cal 3 1830/6.2
Cal 1 1760/6.1
Hydra box: open top and watch the little lights to see that the cycle is
progressing properly:
Sample/s1,s2,s3,s4,s5,s6,s7,s8,s9 , cal1 , cal2 , cal3 ,
Licor 1: Dry air = 55
Ref = 5 ( incr to 7)
sample/cal = 62 ( incr to 65)
P (when in sample mode) = 5.8
Licor 2: Dry air = 58
Ref = 5
sample/cal = 68
P (when in sample mode) = 5.0
Descicant Blue OK OK
14:46 Leave
- 17: CO2, Site stn2_central, Tue 10-Sep-2002 10:57:23 MDT, Hydra visit
Tony D and Britt S visited Niwot site on Thurs 5 Sep''02
Arrived 14:50
Both Gast RAA Hydra aspirator pumps running.
All floating balls between 550 and 650. Adjusted all balls to 60 +_ 3
on the 102-05N (st). This corresponds to 3100 ccpm uncorrected for P and T.
Gas cylinders, Ref 1850/4 psi
Cal2 1700/7.2 psi
15:00 Inlets swopped A1 <-> A4. This was done to bring the
Licor A NCAR 1m sample into time synch with the Licor B NCAR 1m sample.
Licor A sample/cal flow = 50 on N032-15(st), increased to 65 ( = 145 ccpm)
Licor B sample/cal flow.= 40 on N032-15(st), increased to 65 ( = 145 ccpm)
NB caltable for N032-15 (ST):
05 =8, 10 =12, 20 =27, 30 =45, 40 =65, 50 =97, 60 =125, 65 =145 ml min-1
Licor A ref flow = 3 on N032-15(st), increased to 5 ( = 8 ccpm)
Licor B ref flow.= 4 on N032-15(st), increased to 5 ( = 8 ccpm)
Licor A KNF pump P = 5.5 psi
Licor B KNF pump P = 4.5 psi
During the period 15:33 to 15:38 observed sequence sampl/cal1/cal2/cal3/sample.
Looked OK
!6:40 - 16:51 Britt's calibrator to Licor B, ran CalA, CalB, CalC and CalD
!6:53 - 17:03 Britt's calibrator to Licor A, ran CalA, CalB, CalC and CalD
- 15: CO2, Site stn2_central, Wed 04-Sep-2002 13:08:41 MDT, Hydra sample period increased again
At 13:08 MDT the Hydra sample period was increase from 40s to 80s
The number of cycles between cals was decreased from 4 to 2 thus maintaining
the total cal-cal as constant.
- 14: CO2, Site stn2_central, Wed 04-Sep-2002 11:09:46 MDT, Hydra sample period increased
At 10:41 the Hydra sample period was increase from 20s to 40s
The number of cycles between cals was decreased from 8 to 4 thus maintaining
the total cal-cal as constant.
- 13: CO2, Site stn2_central, Wed 04-Sep-2002 10:45:43 MDT, Hydra operational
On Thursday, 28 Aug''02 the Licors were installed with the Hydra and the system set to run over the weekend.The data inspected on Tuesday showed little
variation. The system apparently was not cycling through the different intakes.
On 3 Sept, Tuesday the system was inspected.
Problems:
-the DC had been disconnected when the DC power was run through the BOB.
Thus theOpto22 relay for the sample valve and the sample pump operated but
here was resulting operation. Power restored.
-the serial message from ther ADAM was not received properly and so the opto22
ran intermittently sometimes operating for several cycles and the switching off and restarting. Gordon changed the buffer timing and the system operated well.
Inspection of the data on Wednesday indicated that the Hydra operated properly
overnight.
Promblems:
- the calibration is still incomplete owing to the single cal gas feeding the
manifold valving. This will be rectified when the new manifold valves are
installed.
- there is apparently a 7-8 sec delay after sample valve change before the
analyser responds.
-there is not time within the 20 sec period for the analyser to come to steady
state with the new sample.
The latter two issues will be addressed by increasing sample flowrate,
shortening the sample manifold to analyser lines and increasing the sampler
period.
- 12: CO2, Site stn2_central, Wed 04-Sep-2002 09:12:10 MDT, fixed opto22 command problem
When Tony was up at the hydra yesterday he saw the opto22 relays behaving
erratically. It would work for 5 minutes or so, then quit, then work again.
I think the problem was in rserial.
If rserial's input is not from a terminal (in this case rserial's
input is from a pipe), rserial was adding its own 2 second delay before
sending the data. rserial is also not reading in chunks of lines,
it is just reading what is available. Because of these two
factors I believe a series of opto22 commands like this:
>00J2001??
20 seconds
>00J2002??
20 seconds
>00J2004??
could be received at the opto22 like this:
>00J2
2 seconds...
>001??
18 seconds
>00
2 seconds ...
J20
2 seconds...
02
16 seconds
I think this confused the opto22.
The delay has been removed from rserial, and from the CO2 data, it
looks like the opto22 has been working correctly since then:
Sep 3 22:37 GMT.
- 10: CO2, Site stn2_central, Tue 03-Sep-2002 14:18:38 MDT, opto22.s2
The variable opto22.s2 contains the value of the last 4 hexadecimal
digits of the command ">00JXXXX", that was sent to the opto22 valve
controller on the hydra.
Note that opto22.s2 is value of the command that was sent. An
indication of whether the opto22 actually received the command
and activated the given relays is not directly available in the
present configuration.
To see which relays were switched convert opto22.s2 to hex. The bits
indicate which relays.
opto22
decimal hex meaning
8193 2001 main sample valve (2000hex) and first valve open
8194 2002 sample and second valve open
8196 2004 sample and 3rd valve
8200 2008 sample and 4th
8208 2010 sample and 5th
8224 2020 sample and 6th
8256 2040 sample and 7th
8320 2080 sample and 8th
8448 2100 sample and 9th valve open
4608 1200 main cal valve (1000hex) and 1st cal valve open
5120 1400 main cal and 2nd cal valve open
6144 1800 main cal and 3rd cal valve
0 0 opto reset (every 2 hours), command=">00B"
-65535 FFFF opto config, command=">00GFFFF",
all ports configured for output
- 9: Adams, Site stn2_central, Thu 22-Aug-2002 10:21:13 MDT, Changed datel averaging
The 20hz analog data on cosmos was coming in at 19.9 Hz, and the
channel 0 samples showed a Datel Status of 1:
data_dump -c 0 -A -f cos020822.160000
...
16:18:30.180 0 16 Datel status: 1
16:18:31.190 0 16 Datel status: 1
16:18:32.190 0 16 Datel status: 1
16:18:33.200 0 16 Datel status: 1
16:18:34.200 0 16 Datel status: 1
16:18:35.210 0 16 Datel status: 1
16:18:36.210 0 16 Datel status: 1
16:18:37.220 0 16 Datel status: 1
16:18:38.220 0 16 Datel status: 1
Datel status = 1 means that one 200hz conversion interrupt is
being missed every second.
We are sampling 14 analog channels on cosmos. The datel code
used 14 channels as a cutoff, such that for 1-14 channels
it averaged 8 samples for each output.
It apparently can't quite keep up, so I've changed the cutoff to
13 channels, and so now it will average 4 samples per outout for
the 14 channels. That seems to work, we're seeing 20hz analog
channels, and no Datel status messages in channel 0.
- 7: TRH, Site stn2_central, Fri 16-Aug-2002 19:09:48 MDT, Replaced broken TRH ventilator horn
At 15:30 MDT the ventilator tube, with the broken horn on the 1meter
TRH was replaced.