WIKA PGS23.063 User Manual

Operating
Instructions GB

Pressure gauges Model 232.XX.063
per directive 94/9/EC (ATEX)
with alarm contacts Model 831

II 2 GD c

Contents

1. Safety instructions

2. Description

3. Technical data and intended use

4. Alarm contacts

5. Commissioning

6. Maintenance and servicing / cleaning

7. Repairs

8. Disposal

Enclosure 1: Declaration of conformity
for Models 232.XX.63 with
alarm contacts Model 831

Enclosure 2: EC-type examination certificate
(Ex approval for gases and dust) for slot­type proximity sensors Si2-K08-Y1X
(WIKA-Model 831)

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. [phone]
Fax [phone]
[e-mail]
www.wika.de

1. Safety instructions

The appropriate national safety regulations (e.g. VDE 0100 / EN 60 079-14 /

!

Caution

T Do not work on gauge while under voltage

T Serious injuries and/or damage can occur should the appropriate regulations not be

observed

T Only appropriately qualified persons should work on these instruments

EN 837-2) must be observed when installing, putting into operation and
running these instruments.

11133104.02 05/2014 D/GB

2. Description

T Nominal size 63 mm
T The pressure gauges measure the pressure by means of resilient bourdon tube measuring

elements

T The measuring features are in accordance with the standards EN 837-1
T In addition the case and bezel ring as well as the pressurised components of models

232.3X also meet the requirements of this standard on safety pattern pressure gauges
with solid baffle wall (code S3).

The built-in electrical alarm contacts are non-contact slot-type inductive proximity sensors,
which are supplied from control units with circuits that are certified to be intrinsically safe.
When the adjustable set points are reached, their output circuits will be opened or closed.

The connection values of the switches are in accordance with EN 60 947-5-6 ("NAMUR").

3. Technical data and intended use

Working pressure

Steady: full scale value
Fluctuating: 0.9 × full scale value
Short time: 1.1 × full scale value

Pressure connection

T According to the general technical regulations for pressure gauges, respectively

(e.g. EN 837-2 "Selection and installation recommendations for pressure gauges").

When screw-fitting the gauges the force required for sealing must not be applied through the
case but, using a suitable tool, only through the spanner flats provided for this purpose at the
square of the connector.

Installation with
open-ended spanner

Temperature effect

When temperature of the pressure element deviates from reference temperature (+20 °C):
max. ±0.4 %/10 K of true scale value

IP Ingress protection

Enveloping case IP 54 resp. IP 65 as special feature (EN 60 529 / IEC 60 529)

Materials

Wetted parts: Stainless steel

Movement: Stainless steel

Dial and pointer: Aluminium

Case, bezel ring: Stainless steel

Window: Polycarbonate

Installation

T Nominal position per EN 837-1 / 9.6.7 Figure 9: 90° ( )
T Pressure connection: lower mount (LM) or back mount (BM)
T In order to ensure that with models 232.3X pressure can be safely and reliably vented

through the case back, a distance of at least 25 mm has to remain free behind the case!

T In order to avoid any additional heating, the instruments must not be exposed to direct

solar irradiation while in operation!

Permissible vibratory stress at the mounting location

T As a matter of principle the instruments should only be mounted at locations without

vibratory stresses

T Where required, a decoupling from the mounting location can be achieved e.g. by a

flexible connecting line from the measuring point to the pressure gauge and mounting via
a measuring instrument bracket.

T If this is not possible, the following limits must not be exceeded:

Frequency range < 150 Hz
Acceleration < 0.5 g (5 m/s2)

Operating Temperature

Ambient: -25 ... +60 °C
Attention: Footnote 1) under table 1 must be absolutely taken into account!

Medium: see table 1

Attention! With gaseous substances the temperature may increase as a result of the
compression temperature. In such cases the pressure change rate has to be slowed down
resp. the permissible medium temperature has to be reduced.

Table 1: Permissible medium temperature (only mechanical part)

Ignition temperature of Permissible maximum medium
the ambient atmosphere temperature (in the pressure system)
(temperature class)

T 6 ( > 85 °C) +70 °C
T 5 ( > 100 °C) +85 °C
T 4 ( > 135 °C) +120 °C
T 3 ( > 200 °C) +185 °C
T 2 ( > 300 °C) +200 °C
T 3 ( > 450 °C) +200 °C

1) The permissible upper ambient temperature for the electrical components is determined by the
electrical connection values and the ignition temperature of the ambient gases, vapours and dusts.
Therefore the maximum permissible ambient temperatures specified in the EC-type examination
certificates for slot-type sensors and SN sensors must be observed as well. The lower of these two
values is to be considered the maximum permissible ambient temperature!

4. Alarm contacts

EC-type examination certificates

The proximity sensors are in accordance with EC-type examination certificate
KEMA 01 ATEX 1264 X.
The built-in sensor type is stated on the product label of the pressure gauge.

Contact function index

The contact function of the switch is identified by the indices 1 or 2.

831.1 = NO - normally open, contact makes (clockwise pointer motion)

831.2 = NC - normally closed, contact breaks (clockwise pointer motion)