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July

2026

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28

JD179

29

JD180
at around 10 MST, the CNR4 logger stops sending data to the RAD/CNR logger (suspect a power/battery issue)

SpB Returns

30

JD181

1

JD182

2

JD183

3

JD184
CU Holiday (Day before Independence Day)

4

JD185
At 15:25 MST, turned off LI-7200 fan since flow rate was ~5 slpm

Independence Day

5

JD186

6

JD187

7

JD188
Site Visit (HR): Details, HR Photos (16)

at 10:25 MST, used AC/DC power converter to power CNR4 CR23X logger. Battery voltage before using the adapter was ~0.3 V.

at 10:38 MST, swapped LI-7200 inlet. Post-swap motor drive: 88%, flow rate: 10.5 slpm.

HR Jeep

Partly cloudy, smoky, calm, hot and dry

8

JD189
In Lab/Cristol (SpB, PB): Details , Photos (9)

cleaned up the lab space (the Cristol building to be renovated; must move out of lab in May/June 2027)

did data backups, see: usb_disk_western_digital_my_passport_5Tb.txt, usb_disk_seagate_onetouch_5Tb.txt

9

JD190
Site Visit (DB, +): Details

Dave B. visited the site and found the rechargeable batteries in the teros11 logger were not working properly.

He installed the spare alkaline batteries and then it worked ok.

10

JD191

11

JD192

12

JD193

13

JD194
In Lab/Cristol (SpB): Details , Photos (3)

14

JD195

15

JD196
Site Visit (HR): Details, HR Photos (6)

at 10:24-36 MST, swapped LI-7200 inlet. Post-swap motor drive: 60%, flow rate: 10.5 slpm.

moved 7 batteries from C-1 to MRS snowshed to be removed by CU EHS

there was a power outage from 12:20-14:30 MST, lost contact with the site

HR Jeep

sunny, calm, hot and dry

16

JD197

17

JD198

18

JD199

19

JD200

20

JD201

21

JD202

22

JD203

23

JD204

24

JD205

25

JD206

26

JD207

27

JD208

Data from the UC CR23X stopped transmitting to the datasystem

28

JD209

29

JD210
Site Visit (HR, SpB, DB + CSU folks): Details, SpB Photos (28) , HR Photos (6)

Downloaded data from all loggers

tried to download the SD card data from the MRS logger (did not work).

moved several boxes from the Cristol lab up to the trailer

Attempted to get UC CR23X coms with the datasystem back up, but the problem was found in a Black BOx short haul modem, which we did not have a replacement for

LI-6262: SpB bypassed the flow valves to pull sample gas into the LI-6262 directly, but the cell pressure is now too high, so the LI-6262+pump will be shut off again on next visit

removed metal tables from trailer (taken to MRS); cleaned out some trailer trash

HR Jeep

afternoon thunderstorms

30

JD211

31

JD212

1

JD213