CASELLA CEL CEL-490 Uživatelský manuál stáhnout pdf (Strana 58)

CEL-63x Environmental Noise Meter

58 Casella CEL

5.23 Electromagnetic compatibility

The instrument is designed and tested to comply with the following EMC and

ESD standards:

IEC 61000-4-2 Testing and Measuring Techniques – Electrostatic

discharge immunity tests.

IEC 61000-6-2 Generic standards – Immunity for industrial

environments.

5.24 Effects of AC power frequency fields

Less than ±0.5 dB change from 74 dBA 925 Hz reference level when subjected

to 160 A/m AC magnetic field at 50 Hz and 60 Hz.

5.25 Tripod mounting

Socket to mount on standard ¼-inch (Whitworth) camera tripod thread.

5.26 Display

320 × 240 pixels transmissive colour TFT, update period 0.5 seconds.

5.27 Memory

Micro SD 1 GB non-volatile internal memory.

Maximum capacity: Limited to either:

1. 999 individual runs, or

2. 400 separate runs of 24 hours duration with

1 minute periods and 1 second profiles.

5.28 Connectivity

Refer to Figure 13.

USB Mini B (-CMC51) to download to Casella Insight data

management software.

AC output 2.5 mm stereo jack (barrel ground, tip AC output) provided

for remote monitoring or recording, PC WAV file recording or

headphone applications.

Approximately 0.4 Vrms full-scale output corresponding to

96 dB. Output impedance is approximately 2.2 kΩ. Load

impedance should be as high as possible, and a coaxial

connection cable of between 0.5 metres and 10 metres length

should be used.

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CASELLA CEL CEL-490 Uživatelský manuál Strana 58