B&K 2250 Light Manuel d'utilisateur télécharger pdf (Page 53)

Hand-held Analyzer Type 2250 –

Instruction Manual

4.12.1 Environmental Stabilisation Time

Typical stabilisation time after change in environmental conditions is 1 minute.

When the instruments are moved from a warm environment with high humidity, to a colder environ-

ment, care should be taken not to produce condensation inside the instruments. In this case, much

longer stabilisation periods may be necessary.

4.12.2 Temperature

Operating temperature range: –10 to +50ºC (+14 to +122ºF)

Storage temperature range: –25 to +70ºC (–13 to +158ºF)

4.12.3 Humidity

Operating humidity range: 0% < RH < 90%, providing there is no condensation.

4.12.4 Vibration

Vibration sensitivity (< 1000Hz), measured with Z-weighting: Typically 62.5 dB for 1 ms

–2

, max

65 dB for 1 ms

–2

4.12.5 Magnetic Fields

Max. sensitivity to power line (50/60 Hz) magnetic field strength of 80 A/m:

4.12.6 Immunity to Power and Radio-frequency Fields

Conforms to IEC 60651, IEC 60804 and IEC 61672–1 down to 50 dB.

Fig.4.31

The most sensitive

direction

Table 4.13

Magnetic Fields

Configuration Most Sensitive Direction

Max. Sensitivity

A-weighted

(dB)

C-weighted

(dB)

Z-weighted

(dB)

Type 2250 alone

Not

detectable

<19 <20

Type 4189 and

Type ZC 0032

alone

Not

detectable

<26 <27

040141

H - field

E - field

Direction of

magnetic field

040140

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