Wika 632.51+8xx Manual do Utilizador descarregar pdf (Página 8)

WIKA Operating instructions pressure gauges Model 632.51 with 831 per ATEX

Red set

pointers

Adjustment

lock

Adjustment key

removable

The red set point-

ers for the alarm

contacts are ad-

justable over

the full range

of the instrument.

Switching points

shall be set in the

ranges between

10 % and 90 %

of the scale, to

ensure switching

accuracy and long

life of the

mechanical

measuring

system.

11059738 11/2008 GB/D/F

The permissible limits for U

, I

and P

of the intrinsically safe supply circuits

depend on the sensor type. They can be taken from the corresponding EC-

type examination certificates. (The sensor type is stated on the connection

plate of the pressure gauge.)

Suitable switch amplifiers are e.g.:

4. Alarm contacts

Circuit Sensor type Model designation EC-type exami- WIKA-

(s. Ex-certific.) Fa. Pepperl & Fuchs nation certificate Model

Model 1 standard KFD2-SR2-Ex1 PTB 00 ATEX 2080 904.31

standard KFD2-SR2 Ex2 PTB 00 ATEX 2080 904.32

Model 2 standard KFA6-SR2-Ex1 PTB 00 ATEX 2081 904.28

standard KFA6-SR2-Ex2 PTB 00 ATEX 2081 904.29

SN-sensors KFD2-SH-Ex1 PTB 00 ATEX 2042 904.33

SN-sensors KHA6-SH-Ex1 PTB 00 ATEX 2043 904.30

Electromagnetic compatibility

EMC according to EN 60 947-5-2.

The instruments are to be protected against strong electromagnetic fields.

To adjust red set pointers

The red set pointers for the alarm contacts are adjustable over the adjustment

lock in the window with the aid of adjustment key (included in delivery; to be

found on standard gauges on the outside edge of the junction box).

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