Sea-Bird Electronics SBE 38 Instrukcja Użytkownika Pobierz pdf (Strona 7)

Section 2: Description of SBE 38

Specifications

Measurement

Range

-5 to +35 °C

Initial Accuracy

± 0.001 °C (1 mK)

Typical Stability

0.001 °C (1 mK) in 6 months, certified

Resolution

0.00025 °C (0.25 mK)

Calibration

-1 to +32 °C

Response Time

500 milliseconds

Self-Heating

Error

less than 200 µK

RMS Noise

(at temperature

equivalent of 8.5 °C)

NAvg Noise (°C)

1 0.000673

2 0.000408

4 0.000191

8 0.000133

16 0.000081

32 0.000052

Note:

NAvg = number of A/D cycles per sample.

Interval between samples (seconds)

= (0.133 * NAvg) + 0.339

External Power

RS-232 (standard):

8 – 15 VDC at 15 milliamps average

RS-485 half-duplex (optional):

8 – 15 VDC at 10 milliamps average

Materials

Titanium pressure case rated at

10,500 meters (34,400 feet)

Weight

In water: 0.5 kg (1.2 lbs)

In air: 0.9 kg (2.0 lbs)

Notes:

NIST-traceable calibration applying over the entire range.

Time to reach 63% of final value following a step change in temperature.

Note:

If the SBE 38 is sampling data

and the voltage is less than

6.5 volts for 10 consecutive

scans, the SBE 38 halts sampling

and displays a low battery

indication in the data.

1 2 3 4 5 6 7 8 9 10 11 12 ... 30 31

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