ABB 695FI 작동 지침 - 페이지 6

{카테고리_이름} ABB 695FI에 대한 작동 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB 695FI 16 페이지. Field indicator

CALIBRATION PROCEDURE

The field indicator housing may be grounded using the

external earth connection.

When the wiring connections are complete plug the meter

and check that the cover O-ring gasket is properly in place,

screw on the cover and tighten.

WARNING - For Hazardous Areas installations,the

connection of cables and conduits to the indicator shall

be made in accordance with the requirements of the

relevant type of protection. Cables and cable-glands

must be in accordance with the type of protection.

Unused openings for connection shall be closed with

blanking elements suitable for the relevant type of

protection. With the exception of intrinsically safe

indicators, the means provided for this shall be such

that the blanking element can be removed only with

the aid of tools. The blanking elements must be cer-

tified for the type of protection. See standards either

EN 60079-14 or IEC 79-14. The indicator connections

must also guarantee the degree of protection of the

indicator enclosure, e.g. IPxx according to EN 60529

standard (or IEC60529).

WARNING - For Hazardous Areas installa-

tions, when the ambient temperature is higher than

70°C/158°F, the cable used for the connections must be

suitable for 5°C/41°F above the ambient temperature.

- 6 -

ANALOG OUTPUT METER CALIBRATION

The analog output meter provides a 90° scale indication.

It has either a 0 to 100 linear scale or a 0 to 10 square root

scale or special on request.

The calibration of the analog type meter, only involves

zeroing. Fig. 5 shows the location of the zero adjustment.

Fig. 5 - 90° Analog meter

The calibration is quite simple using one of the following

methods:

- with the loop unpowered adjust the zero screw to read

exactly the true zero mark on the scale.

- with the transmitter transmitting 4 mA adjust the zero screw

to read exactly the live zero of the scale.

Zero

adjustments