◎ S4系列测流仪（深海/浅海、流速/流向）：
S4系列产品家族是经过持续改进的多功能水文数据采集产品，它不断升级，采用了最新的微处理器设备和技术。
S4系列产品家族可以测量流速、方向、波潮、CTD、浑浊度、水质等等。
S4配置表
|
TYPE |
Memory |
DEPTH SENSOR |
CONDUCTIVITY |
TEMPERATURE |
WATER QUALITY |
|
|
64k |
1M |
20M |
0-70M |
0-1KM |
0-6KM |
Conductive |
Inductive |
Standard |
Thermistor |
Platinum |
OBS |
TR |
DO |
PH |
|
S4RT |
|
|
|
* |
* |
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4 BASE |
√ |
* |
|
* |
* |
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4 DW |
|
√ |
|
√ |
|
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4P |
* |
√ |
|
* |
√ |
|
|
√ |
|
√ |
|
* |
* |
* |
* |
|
S4D |
√ |
* |
|
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4A |
|
|
√ |
* |
* |
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4ADW |
|
|
√ |
√ |
|
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
|
S4AP |
|
|
√ |
* |
√ |
|
|
√ |
|
√ |
* |
* |
* |
* |
* |
|
S4AD |
|
|
√ |
|
* |
* |
* |
* |
* |
* |
* |
* |
* |
* |
* |
√:标准配置； *: 可选配置；
S4测流仪系列产品技术指标
● Current Speed
| Range: |
0-350 cm / sec (Standard) |
| |
0-50, 0-100, 0-600, 0-750 cm/sec |
| Accuracy: |
2% of reading +/- 1cm/sec |
| Sampling Rate: |
S4/S4A - 2 Hz |
| |
S4AH - 5 Hz |
| Resolution: |
2Hz 0.03 to 0.35 cm/sec depending on range |
| |
5Hz 0.037 to 0.43 cm/sec depending on range |
| Noise: |
Less than the resolution for averages of 1 minute or longer |
| |
0.05cm/sec rms for 10 second averages |
| |
0.25cm/sec rms for 2 second averages |
| |
0.75cm/sec rms for burst sampling (0.5 second rate) |
| Threshold: |
Equal to resolution |
| Vertical Response: |
True cosine reponse (internally software corrected with Tilt option) |
● Direction
| Type: |
Flux-gate compass |
| Range: |
0-360 |
| Resolution: |
0.5 deg |
| Accuracy: |
+/- 2 deg within tilt angles of 5 deg |
| Tilt: |
+/- 4 deg for tilt angles between 15 and 25 deg |
● Memory
| Type: |
S4 |
CMOS static RAM (Non-restricted Lithium battery protected) |
| |
S4A |
Non-volatile flash memory |
| Battery Lie: |
S4 |
5 years |
| |
S4A |
No battery required |
| Capcity: |
S4 |
64k bytes standard (128k, 256k, 512k, or 1M optional) |
| |
|
348,000 vector averages may be stored with 1M bytes |
| |
S4A |
5, 10, and 20 megabytes |
| |
|
7 million vector averages stored with 20 megabytes |
● Timekeeping
| Type: |
Temperature stable quartz oscillator |
| Accuracy: |
+/- 12 minutes/year |
| Power: |
Temperature stable non-restricted Lithium battery (3 years) |
● Power Supply
| Type: |
Internal batteries (6 Alkaline "D" cells), (Lithium optional) |
| Endurance: |
Alkaline cells: 440 hours continuous logging. One year deployment |
| |
with total on-time less than 440 hours. |
| |
Lithium option: 1,600 hours continuous logging. Five years |
| |
deployment with total on-time less than 1,200 hours. |
● Tilt Option
| Angle Range: |
+/- 45 deg |
| Resolution: |
0.06 deg |
| Accuracy: |
(Angle Output) +/- 0.25 deg |
| |
(Speed Correction) +/- 1% of reading at 45 deg tilt |
● Mechanical
| Size: |
S4 |
25cm (10 in) diameter |
| |
S4 Deep |
35.5cm (14 in) diameter |
| Weight: |
S4 |
Air: 11kg (24lb), Water: 1.5kg (4lb) |
| |
S4 Deep |
Air: 34.5kg (76lb), Water: 10.5kg (23lb) |
| Mooring: |
In-line |
|
| Through Load: |
4,500kg (10,000lb) working |
| Pad Eyes: |
Insulating liner, accepts 1.6cm (5/8 in.) shackle pin |
| Material |
Sphere, glass-filled cycloaliphatic epoxy. |
| |
Mooring rod, Titanium 6 AL-4V |
| Drag: |
S4 |
4kg at 250 cm/sec |
| |
S4 Deep |
0.63kg at 50 cm/sec |
| |
|
15.68kg at 250 cm/sec |
| Depth: |
S4 |
1,000m maximum |
| |
S4 Deep |
6,000m maximum |
| Temperature: |
Storage: |
-40 to +50 deg C |
| |
Operating: |
-5 to +45 deg C |
