Wika IUT-11 Instrukcja Użytkownika Pobierz pdf (Strona 40)

Universal IS Pressure Transmitter UniTrans

Operation of Devices without Displays

2266939.05 D/GB 06/2006

Subject to change due to technical modifications. © Copyright WIKA Alexander Wiegand GmbH & Co. KG / Germany

WIKA Alexander Wiegand GmbH & Co. KG · Alexander-Wiegand-Str. · 63911 Klingenberg ·  (09372) 132 - 710 · Fax - 706 · E-mail: support-tronic@wika.de · www.wika.de

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Example:

A pressure transmitter with 0 ... 400 mbar (nominal pressure) is to be programmed.

The liquid’s surface (with a density of 1) is 1 m above the diaphragm at the zero point.

The maximum (span end-point) should be 3 m. The measuring range (span) is 200

mbar.

This means that the output must be set to 12 mA during programming.

A change in the zero point has no effect on the adjusted span.

However, if the span end-point is higher than the peak value of the

transmitter’s nominal pressure range, then the span end-point is fixed

at this peak value and the span is reduced accordingly.

A change in the span setting has no effect on the zero point. The zero

point and span end-point must fall within the transmitter’s nominal

pressure range.

A test / correction of the zero point is suggested after adjusting the

span in order to maintain optimum accuracy.

A mounting correction should be carried out before or after making an

adjustment without pressure (dry adjustment) (see 8.4.3). The trans-

mitter must therefore be placed in the reference position for the mea-

surement (installation site) without pressure on the diaphragm.

calc

pressure difference (span) (300 mbar -100 mbar)

Sensors nominal pressure 400 mbar

--------------------------------------------------------------------------------------------------------------------------------- -

16 mA 4 mA

+⋅ 12 mA==

Activate

Keypad

(2 sec.)

Calculate

Calibration Value

Calibration of span, without display, without pressure

current value decreases

calc

(2 sec.)

027-DS-GB

Important

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