Barksdale 9000 Series Інструкція з експлуатації - Сторінка 3

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Installation/Commissioning

DANGER

Only install or uninstall the switch when deenergized (electrically and hydraulically/pneumatically).

Pressure connection and electrical connection must be carried out by trained or instructed

personnel according to state-of-the-art standards.

The switch must only be installed in systems where the maximum operation pressure P

exceeded (see the name plate).

WARNING

Pressure peaks and pressure shocks exceeding the maximum operating pressure are

inadmissible.

The maximum operating pressure is the upper final value of the adjustable range or, if specified,

the pressure indicated as maximum operating pressure (see Fig. 9 or the nameplate). Exceeding

the max. operating pressure affects the performance and the life span of the product and may

damage it.

Pressure switches must be mounted vibrationless.

WARNING

Check the switch regularly for functioning.

If the switch does not work properly, stop operation immediately!

IMPORTANT

The standard G1/4" female thread can be mounted directly on the pipe connection. The mounting

with a screw-wrench (SW30 (width across flats 1.18")( only on the thread block (see Fig. 8).

Torque: max. 30 Nm (22 ft lb(f))

IMPORTANT

All pressure switches are tested for proper functioning before they leave the factory. The factory

proof pressures are stated on the type plate.

Contact Protection

The micro switches used are normally suitable for both direct and alternating current operation.

Inductive, capacitive and lamp loads may, however, considerably reduce the life expectancy of a

micro switch and, under extreme circumstances, even damage the contacts.

Depending on the application spark suppression and current limiting is recommended (see figures 1

to 4).

C cable

is not

max

Fig. 1: Protection in case of capacitive loads

R1: Protection against starting current

rushes R2,R3: Protection against high

discharge currents

Fig. 3: Protection in case of continuous

current and inductive load by recovery

diode

Set point adjustment

IMPORTANT

Factory-Provided: pressure (temperature) switch point setting

We confirm for pressure (temperature) switches that have been factory set the setting will be

detailed on the label name plate.

Warranty is not applicable for any changes that may occur due to transportation or installation.

For critical applications we recommend the setting is checked and re-set if cecessary after

installation and wirding of the pressure (temperature) switch.

In pressure switches, a displacement of the pressure sensing element (piston) occurs with a

change in pressure. Following the displacement of the pressure sensing element operates a

microswitch.

Upon delivery of the product, the set points are likely to be found in the middle of the adjustable

range. On request, fix set points may be adjusted by our factory. In this event, the point will be

indicated on the type plate or any separate plate, i = increasing, d = decreasing.

Load

Fig. 2: Lamp load provided with resistance in

parallel or series connection to switch

of condensators

Diode

Load

Fig. 4:

Protection in case of alternating

current and inductive load by RC-link

Load