Gaswechsel im Logbuch

[scubatinoo]

Hallihallo

Mal wieder eine Frage meinerseits

Ich lese die Logbuchdaten mit Subsurface aus. Jetzt ist mir aufgefallen, dass bei "Jojo-Tauchgängen" (z.B. bei Arbeiten am Hafengeschirr) immer beim Abtauchen ein Gaswechsel angezeigt wird. Bei "sauberen" Tauchgängen hingegen wird alles so angezeigt wie es soll...

Was wird da ins Logbuch des OSTC geschrieben, dass Subsurface meint es handelt sich um einen Gaswechsel? Es gibt ja zwei Möglichkeiten: Der OSTC schreibt was falsches ins Logbuch oder Subsurface interpretiert die erhaltenen Daten falsch...

Vielen Dank, wenn ihr der Sache kurz nachgehen könnt.

[heinrichsweikamp]

Kannst Du den mitsprechenden TG mal posten (Idealerweise als .dive Datei von den "OSTC Tools" )?

Gruß,
Matthias

[scubatinoo]

Dummerweise habe ich bei den jüngsten Tauchgängen die "Gaswechsel" bereits gelöscht... Habe erst im Nachhinein gemerkt dass es eine gewisse Regelmässigkeit gibt... Habe aber noch einen älteren Tauchgang gefunden- siehe Screenshot. Und eine weitere Regelmässigkeit entdeckt: Bei den Tauchgängen handelt es sich um TG's, welche von Subsurface zusammengefügt werden. Du bekommst also 2 Stk. dive Dateien von mir... Gut möglich also, dass Subsurface da selber was durcheinander bringt.

[heinrichsweikamp]

Schau mal hier in die Details:

[pre]
Filename: 00147_23-07-2015_005m_011min.dive

DiveNumber: 147
Date of dive: 23.07.2015
Time at begin of dive: 12:26:21
Time at end of dive: 12:43:00
Maximum depth (mbar): 468
Maximum depth (bar): 0,468
Divetime: 11min 35sec

Selected Gas at begin of dive (1): 21/0
Gas 1: Air
Gas 2: EAN50
Gas 3: Oxygen
Gas 4: Air
Gas 5: Air
Gas 6: Air
Active gases at end of dive (1) Air

Minimum water temperature: 21,8
Maximum water temperature from profile:23,5
Minimum water temperature from profile:22
Surface air pressure (mBar): 977
Salinity: 1
Desaturation time after dive (min): 33
Maximum CNS (%): 0

Average depth: 357 mbar
Total divetime: 999 sec
Gradient Factor Low: 15%
Gradient Factor High: 85%
Decotype: ZH-L16-GF OC
Last decostep is at 3m.

Firmware version: 303
LogBookProfileVersion: 33
Battery voltage in mV after dive: 4,076
2 Full hours of use (Active modes) since last full charge.

Sampling rate (sec): 10
Sampling divisor temperature: 6 information size 2
Sampling divisor deco/NDL: 6 information size 2
Sampling divisor gradientfactor: 6 information size 1
Sampling divisor ppO2 sensors: 0 information size 3
Sampling divisor decoplan: 0 information size 15
Sampling divisor CNS: 12 information size 1

Profile data

Number of ProfileEntries: 99

Entry Time Depth mBar , Additional Info
1 0:00:10 3,22m 316
2 0:00:20 3,31m 325
3 0:00:30 3,32m 326
4 0:00:40 3,45m 338
5 0:00:50 3,28m 322
6 0:01:00 3,20m 314 , Temperature 231, Non Deko Limit 240min, Gradient factor 0
7 0:01:10 3,25m 319
8 0:01:20 3,44m 337
9 0:01:30 3,95m 387
10 0:01:40 3,74m 367
11 0:01:50 3,51m 344
12 0:02:00 3,87m 380 , Temperature 226, Non Deko Limit 240min, Gradient factor 0, CNS 0
13 0:02:10 4,08m 400
14 0:02:20 4,06m 398
15 0:02:30 4,05m 397
16 0:02:40 4,07m 399
17 0:02:50 3,98m 390
18 0:03:00 4,20m 412 , Temperature 222, Non Deko Limit 240min, Gradient factor 0
19 0:03:10 3,90m 382
20 0:03:20 3,21m 315
21 0:03:30 3,07m 301
22 0:03:40 2,50m 245
23 0:03:50 3,10m 304
24 0:04:00 3,32m 326 , Temperature 231, Non Deko Limit 240min, Gradient factor 0, CNS 0
25 0:04:10 3,44m 337
26 0:04:20 3,55m 348
27 0:04:30 3,60m 353
28 0:04:40 3,07m 301
29 0:04:50 2,85m 279
30 0:05:00 3,44m 337 , Temperature 229, Non Deko Limit 240min, Gradient factor 0
31 0:05:10 3,37m 330
32 0:05:20 3,46m 339
33 0:05:30 4,03m 395
34 0:05:40 3,75m 368
35 0:05:50 4,23m 415
36 0:06:00 4,14m 406 , Temperature 222, Non Deko Limit 240min, Gradient factor 0, CNS 0
37 0:06:10 4,26m 418
38 0:06:20 3,94m 386
39 0:06:30 3,84m 377
40 0:06:40 4,09m 401
41 0:06:50 4,07m 399
42 0:07:00 3,84m 377 , Temperature 220, Non Deko Limit 240min, Gradient factor 0
43 0:07:10 3,41m 334
44 0:07:20 3,46m 339
45 0:07:30 3,43m 336
46 0:07:40 3,29m 323
47 0:07:50 3,47m 340
48 0:08:00 3,85m 378 , Temperature 221, Non Deko Limit 240min, Gradient factor 0, CNS 0
49 0:08:10 3,74m 367
50 0:08:20 3,17m 311
51 0:08:30 1,88m 184
52 0:08:40 0,49m 48
53 0:08:50 0,43m 42
54 0:09:00 0,47m 46 , Temperature 230, Non Deko Limit 240min, Gradient factor 0
55 0:09:10 0,44m 43
56 0:09:20 0,42m 41
57 0:09:30 0,41m 40
58 0:09:40 0,53m 52
59 0:09:50 1,97m 193
60 0:10:00 3,10m 304 , Temperature 233, Non Deko Limit 240min, Gradient factor 0, CNS 0
61 0:10:10 3,25m 319
62 0:10:20 3,70m 363
63 0:10:30 3,63m 356
64 0:10:40 3,54m 347
65 0:10:50 3,62m 355
66 0:11:00 3,78m 371 , Temperature 224, Non Deko Limit 240min, Gradient factor 0
67 0:11:10 3,87m 380
68 0:11:20 3,93m 385
69 0:11:30 4,11m 403
70 0:11:40 4,32m 424
71 0:11:50 4,41m 432
72 0:12:00 4,33m 425 , Temperature 220, Non Deko Limit 240min, Gradient factor 0, CNS 0
73 0:12:10 4,55m 446
74 0:12:20 4,42m 433
75 0:12:30 2,99m 293
76 0:12:40 0,20m 20
77 0:12:50 0,36m 35
78 0:13:00 0,30m 29 , Temperature 229, Non Deko Limit 240min, Gradient factor 0
79 0:13:10 0,22m 22
80 0:13:20 0,25m 25
81 0:13:30 0,05m 5
82 0:13:40 0,31m 30
83 0:13:50 0,38m 37
84 0:14:00 0,34m 33 , Temperature 233, Non Deko Limit 240min, Gradient factor 0, CNS 0
85 0:14:10 0,32m 31
86 0:14:20 0,23m 23
87 0:14:30 0,28m 27
88 0:14:40 0,08m 8
89 0:14:50 0,08m 8
90 0:15:00 0,27m 26 , Temperature 235, Non Deko Limit 240min, Gradient factor 0
91 0:15:10 0,04m 4
92 0:15:20 0,07m 7
93 0:15:30 0,00m 0
94 0:15:40 0,02m 2
95 0:15:50 0,04m 4
96 0:16:00 0,01m 1 , Temperature 234, Non Deko Limit 240min, Gradient factor 0, CNS 0
97 0:16:10 0,04m 4
98 0:16:20 0,04m 4
99 0:16:30 0,01m 1
[/pre]

und der 2. TG

[pre]
Filename: 00148_23-07-2015_005m_013min.dive

DiveNumber: 148
Date of dive: 23.07.2015
Time at begin of dive: 12:46:14
Time at end of dive: 13:07:00
Maximum depth (mbar): 453
Maximum depth (bar): 0,453
Divetime: 13min 1sec

Selected Gas at begin of dive (1): 21/0
Gas 1: Air
Gas 2: EAN50
Gas 3: Oxygen
Gas 4: Air
Gas 5: Air
Gas 6: Air
Active gases at end of dive (1) Air

Minimum water temperature: 22
Maximum water temperature from profile:23,7
Minimum water temperature from profile:22,1
Surface air pressure (mBar): 977
Salinity: 1
Desaturation time after dive (min): 69
Maximum CNS (%): 0

Average depth: 343 mbar
Total divetime: 1246 sec
Gradient Factor Low: 15%
Gradient Factor High: 85%
Decotype: ZH-L16-GF OC
Last decostep is at 3m.

Firmware version: 303
LogBookProfileVersion: 33
Battery voltage in mV after dive: 4,047
3 Full hours of use (Active modes) since last full charge.

Sampling rate (sec): 10
Sampling divisor temperature: 6 information size 2
Sampling divisor deco/NDL: 6 information size 2
Sampling divisor gradientfactor: 6 information size 1
Sampling divisor ppO2 sensors: 0 information size 3
Sampling divisor decoplan: 0 information size 15
Sampling divisor CNS: 12 information size 1

Profile data

Number of ProfileEntries: 124

Entry Time Depth mBar , Additional Info
1 0:00:10 1,96m 192
2 0:00:20 2,29m 225
3 0:00:30 3,19m 313
4 0:00:40 3,48m 341
5 0:00:50 3,57m 350
6 0:01:00 3,59m 352 , Temperature 229, Non Deko Limit 240min, Gradient factor 0
7 0:01:10 3,55m 348
8 0:01:20 3,53m 346
9 0:01:30 3,39m 332
10 0:01:40 3,39m 332
11 0:01:50 3,66m 359
12 0:02:00 3,26m 320 , Temperature 230, Non Deko Limit 240min, Gradient factor 0, CNS 0
13 0:02:10 2,97m 291
14 0:02:20 3,03m 297
15 0:02:30 3,51m 344
16 0:02:40 3,71m 364
17 0:02:50 3,37m 330
18 0:03:00 3,47m 340 , Temperature 228, Non Deko Limit 240min, Gradient factor 0
19 0:03:10 2,53m 248
20 0:03:20 0,79m 77
21 0:03:30 0,46m 45
22 0:03:40 0,54m 53
23 0:03:50 1,62m 159
24 0:04:00 2,48m 243 , Temperature 234, Non Deko Limit 240min, Gradient factor 0, CNS 0
25 0:04:10 3,39m 332
26 0:04:20 3,67m 360
27 0:04:30 3,58m 351
28 0:04:40 3,43m 336
29 0:04:50 3,59m 352
30 0:05:00 3,64m 357 , Temperature 228, Non Deko Limit 240min, Gradient factor 0
31 0:05:10 3,61m 354
32 0:05:20 1,66m 163
33 0:05:30 0,47m 46
34 0:05:40 0,44m 43
35 0:05:50 0,39m 38
36 0:06:00 0,65m 64 , Temperature 234, Non Deko Limit 240min, Gradient factor 0, CNS 0
37 0:06:10 2,68m 263
38 0:06:20 3,61m 354
39 0:06:30 3,56m 349
40 0:06:40 3,73m 366
41 0:06:50 3,92m 384
42 0:07:00 4,49m 440 , Temperature 223, Non Deko Limit 240min, Gradient factor 0
43 0:07:10 4,48m 439
44 0:07:20 4,46m 437
45 0:07:30 3,92m 384
46 0:07:40 3,89m 381
47 0:07:50 4,25m 417
48 0:08:00 3,35m 329 , Temperature 222, Non Deko Limit 240min, Gradient factor 0, CNS 0
49 0:08:10 3,40m 333
50 0:08:20 3,52m 345
51 0:08:30 4,02m 394
52 0:08:40 4,30m 422
53 0:08:50 3,42m 335
54 0:09:00 3,70m 363 , Temperature 226, Non Deko Limit 240min, Gradient factor 0
55 0:09:10 3,38m 331
56 0:09:20 3,80m 373
57 0:09:30 3,84m 377
58 0:09:40 3,93m 385
59 0:09:50 4,03m 395
60 0:10:00 3,95m 387 , Temperature 221, Non Deko Limit 240min, Gradient factor 0, CNS 0
61 0:10:10 4,31m 423
62 0:10:20 4,19m 411
63 0:10:30 4,04m 396
64 0:10:40 3,73m 366
65 0:10:50 4,00m 392
66 0:11:00 3,98m 390 , Temperature 222, Non Deko Limit 240min, Gradient factor 0
67 0:11:10 4,03m 395
68 0:11:20 3,78m 371
69 0:11:30 4,05m 397
70 0:11:40 4,04m 396
71 0:11:50 4,05m 397
72 0:12:00 4,02m 394 , Temperature 223, Non Deko Limit 240min, Gradient factor 0, CNS 0
73 0:12:10 3,99m 391
74 0:12:20 3,76m 369
75 0:12:30 3,92m 384
76 0:12:40 3,90m 382
77 0:12:50 3,66m 359
78 0:13:00 2,76m 271 , Temperature 223, Non Deko Limit 240min, Gradient factor 0
79 0:13:10 0,69m 68
80 0:13:20 0,27m 26
81 0:13:30 0,24m 24
82 0:13:40 0,17m 17
83 0:13:50 0,21m 21
84 0:14:00 0,13m 13 , Temperature 233, Non Deko Limit 240min, Gradient factor 0, CNS 0
85 0:14:10 0,10m 10
86 0:14:20 0,40m 39
87 0:14:30 0,12m 12
88 0:14:40 0,07m 7
89 0:14:50 0,16m 16
90 0:15:00 0,23m 23 , Temperature 235, Non Deko Limit 240min, Gradient factor 0
91 0:15:10 0,17m 17
92 0:15:20 0,30m 29
93 0:15:30 0,27m 26
94 0:15:40 0,25m 25
95 0:15:50 0,12m 12
96 0:16:00 1,10m 108 , Temperature 235, Non Deko Limit 240min, Gradient factor 0, CNS 0
97 0:16:10 2,11m 207
98 0:16:20 3,03m 297
99 0:16:30 2,99m 293
100 0:16:40 1,41m 138
101 0:16:50 0,29m 28
102 0:17:00 0,32m 31 , Temperature 236, Non Deko Limit 240min, Gradient factor 0
103 0:17:10 0,37m 36
104 0:17:20 0,00m 0
105 0:17:30 0,06m 6
106 0:17:40 0,15m 15
107 0:17:50 0,14m 14
108 0:18:00 0,07m 7 , Temperature 236, Non Deko Limit 240min, Gradient factor 0, CNS 0
109 0:18:10 0,15m 15
110 0:18:20 0,04m 4
111 0:18:30 0,04m 4
112 0:18:40 0,22m 22
113 0:18:50 0,00m 0
114 0:19:00 0,00m 0 , Temperature 237, Non Deko Limit 240min, Gradient factor 0
115 0:19:10 0,04m 4
116 0:19:20 0,11m 11
117 0:19:30 0,12m 12
118 0:19:40 0,19m 19
119 0:19:50 0,01m 1
120 0:20:00 0,14m 14 , Temperature 237, Non Deko Limit 240min, Gradient factor 0, CNS 0
121 0:20:10 0,02m 2
122 0:20:20 0,30m 29
123 0:20:30 0,01m 1
124 0:20:40 0,13m 13
[/pre]

Ich würde sagen das ist eine Subsurface "Funktion".

Gruß,
Matthias

[TnT]

Libdivecomputer reports a gaschange on the first sample to indicate the initial gas mix. So if you join two dives in subsurface, that switch is probably the initial mix of the second half. If you join two dives with the same initial mix (e.g. Air), then the switch is basically a no-op (e.g. air to air).

[scubatinoo]

Hm... Now i see a difference:

Selected Gas at begin of dive (1): 21/0
...
Active gases at end of dive (1) Air

Although "21/0" and "Air" are the same, they are not? What happens if we change
"21/0" (begin of dive) to "Air" or "Air" (end of dive) to "21/0" so that the two values are same-same in text and meaning?

The difference in text could explain why Subsurface thinks that i had a gas change, from "Air" to "21/0"...

[Rob]

scubatinoo,

die 21/0 stammen von OSTCTools, das ist ein Formatierungsfehler in der Anzeige.
Wichtig ist hier das
Selected Gas at begin of dive (1): 21/0
Active gases at end of dive (1) Air

das bedeutet das zu begin und ende Gas 1 selektiert war.

Viele Grüße
Rob

[scubatinoo]

Danke Rob, für die Aufklärung -D