- 117: SURFACE, Site ISS4 (Los Mochis), Sat 17-Jul-2004 14:50:31 GMT, IRT test (6H/6L)
We are testing the effect of swapping 6H and 6L. Tdome and Tcase contacts.
but note there is a mid-level stratus deck obscuring the sun, so it may not
make much difference today.
First switch was made: 14:50
Returned to original state: 15:15
Before: about 440
During about: 415
After: about 435
We will repeat this test another day at another site...
- 110: SURFACE, Site ISS4 (Los Mochis), Sat 17-Jul-2004 02:03:59 GMT, IRT Fixed, Maybe! with Questions?
7/16, ~22:00Z Downloaded new NAMEISS4.DLD file: correct coef. for IRT
The coefficients in the logger for the Tcase 5th order poly value A5
was off per what Steve Semmer sent us. Edited campbell program and
placed the new file where the 'surface start' script will grab it
for programming into the campbell.
Old, Saved .csi/.dld files:
/iss/config/campbell/name2004/NAMEISS4.DLD.SAVE had a5=14.399
/iss/config/campbell/name2004/NAMEISS4.DLD has a5=15.351
Results: Immediately the values 'came-in-line' with roughly what the
Penasco/Kino readings have been running: ~450w/M^2 in daytime.
NOTE: this seems really high based on our expectations of what
it should be, although the consistency with others is tantilizing.
Overall Changes included:
1) These new coefficients
2) Earlier swap of Tc/Td that had been wired backwards on 6L/H
It's possible the wiring at Penasco/Kino/Mochis may now be backwards on
1) The readings are now consistent and unexpectedly (to stupid engr.)
high at all 3 sites.
2) I changed the wiring here to match the IRT-Campbell cable as in
Kino and Penasco....ie changed this 6L/6H
3) The comments in the .CSI file are somewhat contrary to what's in
the code, and what's in the document SteveS sent indicating that
the Tdome is on pin-G (sensor) to 6L on wiring panel; and
the Tcase is on pin-E (sensor) to 6H on wiring panel.
See included lines from the CSI file below.
What to Watch: determine if the signals are too high.
decide if the code is correct.
Top Comment of CSI file:
;Program:NAMEiss4 [ISS4 mapr]
;Input Channel Usage:
;1H WD 2500mV range
;2H HUM 2500mV range
;2L PRESS 2500mV range
;3H Net Rad 250mV range
;3L Net Rad
;4H SOL PSP 25mV range
;4L SOL PSP
;5H IR PYG 25mV range
;5L IR PYG
;6H DOME TEMP PYG 250mV fast range
;6L CASE TEMP PYG
;/* These are comments */
In-Line Code of Program: note this should grab 6L=tdome, 6H=tcase
;This subroutine calculates the temperature for a 10K
;YSI-44031 type thermistor. The data is input in
;locations 11 & 12 and output in the locations 13 (TDOME)
; These coefs are for pyg s/n 28809. calc done 3-30-98
; These are to calc dome temperature.
2: Polynomial (P55)
1: 1 Reps
2: 11 X Loc [ TDOME_1 ]
3: 13 F(X) Loc [ TDOME_C ]
4: -42.776 C0
5: 181.48 C1
6: -263.90 C2
7: 227.48 C3
8: -96.552 C4
9: 15.622 C5
; These are coefs to calc case temperature.
3: Polynomial (P55)
1: 1 Reps
2: 12 X Loc [ TDOME_2 ]
3: 14 F(X) Loc [ TCASE_C ]
4: -42.819 C0
5: 181.40 C1
6: -263.53 C2
7: 226.86 C3
8: -96.137 C4
9: 14.399 C5
- 89: SURFACE, Site ISS4 (Los Mochis), Wed 14-Jul-2004 20:55:51 GMT, IRT Sensor Installed/Check
IRT Sensor S/N Installed 2:30Z 7/14
Data OK overnight.
Data still toast as expected in day.
Wiring Change - working with wires between 20:00Z until 20:28Z:
6H wire was loose and easily pulled out...
6H/6L wired opposite than at Kino/Penasco sites:
Changed from 6L - E to 6L - G as others
Changed from 6H - G to 6H - E as others
This may account for some of the 'offset' at night Hal reported....
ie the Tc/Td were reversed.
However it is Still Bad in Daytime:
Examining data after 20:28 indicates this was not the problem,
data is still ~50w/m^2 which is low.
Check Excitation voltage: difficult to check its level, seems going to ~150mV
but 'digital meter issue.
Output for Tc/Td to gnd ~15mV. Vdivider 930ohms ok.
Check for problem in dome:
7/14 22:00-22:30 dome covered with box. Appears to recover although with
cloud cover that's a factor. Will try to repeat when there's more
7/15 17:20Z dome covered, partly/mostly sunny and daytime problem evident.
signal 'recovered' to ~200w/m^2
7/15 19:10Z box removed from dome. When dome was covered, IR quickly dropped from about 200 W/m2 down to about 100 W/m2. Reading then rose back to 200 level over about 10 minutes. Was slowly decreasing to about 175 by 19Z.
- 37: SURFACE, Site ISS4 (Los Mochis), Thu 08-Jul-2004 18:56:49 GMT, Pyrgeometer removed and taken to Bahia Kino
Charlie and Hal have taken the pyrgeometer (S/N 28809F3) to Bahia Kino to see if it works on that ISS, and where they have a battery to try.
Cohn and Militzer will bring it back down to Los Mochis during their circuit.
- 36: SURFACE, Site ISS4 (Los Mochis), Thu 08-Jul-2004 18:53:37 GMT, Pyrgeometer not working
The pyg has not been working since the system was set up. The IR shows a diurnal trace, with values going to zero during the day.
- 11: SURFACE, Site ISS4 (Los Mochis), Tue 29-Jun-2004 02:41:36 GMT, Surface serial number documentation
Equipment serial numbers
NET 92072 top 5.67 bot 10.69