Barksdale DPD1T Panduan Petunjuk Pengoperasian - Halaman 3
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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
Pressure peaks and pressure shocks exceeding the maximum operating pressure are
inadmissible.
WARNING
CAUTION
Contact Protection
The micro switches used are normally suitable for both direct and alternating current
personnel according to state-of-the-art standards.
suitable for both vacuum and pressure applications.
Alternating pressure - vacuum applications are not authorized in switch types which are
If the switch does not work properly, stop operation immediately!
Check the switch regularly for functioning.
WARNING
Pressure switches must be mounted vibrationless.
damage it.
operating pressure affects the performance and the life span of the product and may
The maximum operating pressure is the upper final value of the adjustable range or, if
factory proof pressures are stated on the type label.
IMPORTANT
All pressure switches are tested for proper functioning before they leave the factory. The
specified, the pressure indicated as maximum operating pressure. Exceeding the max.
4
R1: Protection against
C
C cable
R1
R3
operation. Inductive, capacitive and lamp loads may, however, considerably reduce the life
5
U
Load
loads
Load
succeeding figures).
Fig. 1: Protection in case of capacitive
Depending on the application spark suppression and current limiting is recommended (see
contacts.
expectancy of a micro switch and, under extreme circumstances, even damage the
R
starting current rushes R2,R3:
MS
Protection against high discharge
Diod
R
U
Fig. 2:
link
Lamp load provided with resistance
MS
in parallel or series connection to
R2
switch of condensators
Load
Fig. 3:
MS
Protection in case of continuous
R
current and inductive load by
MS
recovery diode
=
Fig. 4:
e
Protection in case of alternating
MS
current and inductive load by RC-
currents
The switch must only be installed in systems where the maximum pressure P
is not
max
exceeded (see type label).
5
Installation/Commissioning