Directed Electronics 3200HS Bedienungsanleitung PDF herunterladen (Seite 38)

38 GOSSEN Mueller & Weigert

Regulations and Standards

Our panel meters and limit transducers (MESSCONTACTER) comply with the regulations

set forth in European guidelines 73/23/EWG and 89/336/EWG, which has been substan-

tiated by adherence to the following standards:

DIN 57410 and. VDE 0410 (safety requirements for indicators)

IEC/EN 61010-1/A2, VDE 0411-1/A1 (safety requirements for limit transducers)

IEC 60051/EN 60051/DIN EN 60051 (measuring instruments with scale display)

EN 50081-2: 1993 EMV (interference emission, industrial)

EN 50082-2: 1995 EMV (interference immunity, industrial)

The most important regulations for the manufacture of electrical measuring instruments

included therein, as well as their characteristics, are defined below.

Accuracy

The accuracy of a measuring instrument or any of its accessories is determined by

inherent deviation limits and influence error limits.

Inherent deviation is the measurement deviation of a measuring instrument and/or any of

its accessories, when these are operated under reference conditions (table I-1, DIN

EN 60 051). Measuring instrument influence error, on the other hand, is the error which

is measured when these are not operated under reference conditions, but rather within

the limits defined by the nominal range of use (table II-1, DIN EN 60 051).

Our measuring instruments comply with accuracy class 1.5 unless otherwise specified for

individual measuring instrument types. The measuring instruments can optionally be

optionally manufactured to higher accuracy classes (class 1), in as far as this is possible.

The accuracy class is indicated on the scale, for example:

class 1.5 for indication error expressed as a percentage of the reference value.

The reference value is generally the upper measuring range limit with the following

exceptions:

• The reference value is equal to the sum of the electrical values which correspond to

the upper and low measuring range values, independent of plus or minus sign, if both

the electrical and the mechanical zero points lie within the scale.

• The reference value corresponds to one quadrant for phase sequence indicators.

• The reference value is equal to the difference between the resistance values of the

upper and low measuring range values for resistance measuring instruments with

linear scales.

• The reference value corresponds to the length of the scale for instruments with

non-linear, contracting scales without a separate linear scale (e.g. resistance

measuring instruments).

• The reference value is equal to the nominal value for accessories.

Reference Values and Influence Error

Position of Use

The nominal position of use is generally indicated with a positioning mark. The reference

range includes every position between horizontal and vertical for instruments which do

not include a positioning mark. The nominal range of use includes all positions within 5˚ in

any direction from the reference position, and influence error (in addition to indication

error) may not exceed 50% of the corresponding error class rating.

Operating Temperature Range

Unless otherwise specified, class 0.5 through class 5 instruments must be operated at an

ambient temperature within a range of –25 to + 40 °C in order to prevent permanent

damage during continuous operation.

Ambient Temperature Sensitivity

Unless otherwise specified, the reference temperature for class 0.5 through class 5

instruments is 23 °C ± 2 °C.

The nominal range of use is equal to reference temperature ±10 °C. Additional error

within this temperature range may not exceed the error class rating.

Inclined nominal position

(scale surface angle

measured from the

horizontal, e.g. 120˚)

Vertical nominal position

Inclined nominal position

Horizontal nominal position

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