B&K 2250 Light Manual do Utilizador descarregar pdf (Página 49)

Hand-held Analyzer Type 2250 –

Instruction Manual

Response to tone bursts for exponential averaging detectors according to IEC 60651 and DIN 45657:

Note: The maximum response to test tone burst referred to response to continuous signal is calculated from the formula in IEC 60651

appendix C.

4.10.2 Linear Averaging

Linear averaging times: 1 second to 24 hours, in steps of 1 second

Settling time according to IEC 60804: < 1 second

Nominal delay time between operation of the reset facility and re-initiation of a measurement

according to IEC 61672–1: < 2 seconds

Time interval after completion of a measurement before a reading is displayed according to

IEC 61672–1: < 1 s

Minimum hold time according to IEC 60804: Results of a Timed Measurement are held until a new

measurement is initiated or the result is reset.

4.10.3 Peak

Peak onset time according to IEC 60651: <100µs

Table 4.9

Response to tone

bursts for exponen-

tial averaging

detectors

Time

Weighting

Duration of

test tone burst

(ms)

Maximum

response to test

tone burst

referred to

response to

continuous signal

(dB)

Standard

tolerances on

maximum response

(dB)

Type 2250

tolerances on

maximum

response

(dB)

Continuous 0

F 200 –0.98 ±1 ±0.1

100 –2.59 ±2 ±0.1

50 –4.82 ±2 ±0.1

20 –8.30 ±2 ±0.1

10 –11.14 ±2 ±0.1

5 –14.07 ±2 ±0.1

2 –17.99 ±2 ±0.1

1 –20.99 ±2 ±0.1

0.5 –23.99 ±2 ±0.1

0.25 –26.99 ±2 ±0.1

S 2000 –0.63 – ±0.1

500 –4.05 ±1 ±0.1

200 –7.42 – ±0.1

50 –13.12 – ±0.1

I 20 –3.61 ±1.5 ±0.1

5 –8.76 ±2 ±0.1

2 –12.55 ±2 ±0.1

BE171211.book Page 44 Thursday, May 27, 2004 1:01 PM

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B&K 2250 Light Manual do Utilizador Página 49

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