Before:

we used qclread version 2.05, which is the most recent version:

chadaq@CH-CHA-iDAQ-BOX1-0-1:/home/data/CH-CHA-iDAQ-BOX1-0-1$ grep Start qc-tildas0.log | tail -3
Starting: qclread Version 2.05 (07 December 2018) 	Wed Feb  5 13:27:02 2020
Starting: qclread Version 2.05 (07 December 2018) 	Tue Mar 31 08:30:36 2020
Starting: qclread Version 2.05 (07 December 2018) 	Wed May 13 10:31:04 2020


chadaq@CH-CHA-iDAQ-BOX1-0-1:/home/data/CH-CHA-iDAQ-BOX1-0-1$ qclshow
queueid 75
reading from message queue 131076...
QCL CH4 1966190.0 N2O 323054.0 H2O 9060560000.0 TEMP 303735.0 PRESS 39835.0
QCL CH4 1965930.0 N2O 323383.0 H2O 9010830000.0 TEMP 303736.0 PRESS 39828.0
QCL CH4 1967190.0 N2O 323170.0 H2O 9153940000.0 TEMP 303733.0 PRESS 39820.0
QCL CH4 1967750.0 N2O 322967.0 H2O 9192310000.0 TEMP 303736.0 PRESS 39830.0
QCL CH4 1966450.0 N2O 322855.0 H2O 9268240000.0 TEMP 303733.0 PRESS 39832.0
QCL CH4 1965660.0 N2O 323114.0 H2O 9655740000.0 TEMP 303731.0 PRESS 39829.0
QCL CH4 1965740.0 N2O 322912.0 H2O 10047200000.0 TEMP 303728.0 PRESS 39824.0
QCL CH4 1967160.0 N2O 322925.0 H2O 10161700000.0 TEMP 303733.0 PRESS 39824.0


What I did:

on the Chamau computer in the $HOME/PROGS/QCL subdirectory I modified
qcl.h:

The line
#define QCL_MULTIPLIER_H2O      1000.0   /* this was 1.0 before version 2.05, 2018-12-07 */
was commented out and the following line was added:
#define QCL_MULTIPLIER_H2O      1.0   /* this was 1000.0 after 2018-12-07 until 2020-05-15 */

Then I compiled with
make

Then copied the new version to the /usr/local/bin directory, but for this
I first had to stop the current qclread script. Thus, the sequence is

sudo killqcl
sudo mv /usr/local/bin/qclread /usr/local/bin/qclread-until-20200515
sudo cp qclread /usr/local/bin/qclread
sudo checkqcl

Then a check with qclshow indicates:

chadaq@CH-CHA-iDAQ-BOX1-0-1:~/PROGS/QCL$ qclshow
queueid 75
reading from message queue 131076...
QCL CH4 1965570.0 N2O 322655.0 H2O 9563840.0 TEMP 303728.0 PRESS 39903.0
QCL CH4 1967040.0 N2O 323260.0 H2O 9564460.0 TEMP 303728.0 PRESS 39903.0
QCL CH4 1967530.0 N2O 322969.0 H2O 9427860.0 TEMP 303726.0 PRESS 39880.0
QCL CH4 1964590.0 N2O 322372.0 H2O 9206000.0 TEMP 303722.0 PRESS 39919.0
QCL CH4 1965880.0 N2O 323072.0 H2O 9155050.0 TEMP 303730.0 PRESS 39907.0
QCL CH4 1966740.0 N2O 322724.0 H2O 9231560.0 TEMP 303729.0 PRESS 39908.0
QCL CH4 1968870.0 N2O 322908.0 H2O 9246610.0 TEMP 303726.0 PRESS 39906.0
QCL CH4 1966070.0 N2O 322970.0 H2O 9034380.0 TEMP 303726.0 PRESS 39912.0
QCL CH4 1966010.0 N2O 323176.0 H2O 9013290.0 TEMP 303724.0 PRESS 39885.0
QCL CH4 1966370.0 N2O 323075.0 H2O 9159700.0 TEMP 303728.0 PRESS 39910.0
QCL CH4 1967270.0 N2O 322523.0 H2O 9098990.0 TEMP 303730.0 PRESS 39908.0

And check the log file
grep Start /home/data/CH-CHA-iDAQ-BOX1-0-1/qc-tildas0.log | tail -3

chadaq@CH-CHA-iDAQ-BOX1-0-1:~/PROGS/QCL$ grep Start /home/data/CH-CHA-iDAQ-BOX1-0-1/qc-tildas0.log | tail -3
Starting: qclread Version 2.05 (07 December 2018) 	Tue Mar 31 08:30:36 2020
Starting: qclread Version 2.05 (07 December 2018) 	Wed May 13 10:31:04 2020
Starting: qclread Version 2.05 (07 December 2018) 	Fri May 15 13:32:27 2020

Please note that I did not change the version number or version date for this,
it is still version 2.05. The affected raw data file is 2020051513.C00 which
should show this transition from the old to the new setting.