Design And Principle Of Operation - Samson System 6000 Mounting And Operating Instructions

3 Design and principle of oper-
ation
The device consists of an i/p converter mod-
ule and a downstream volume booster.
When operated, the supplied direct current i
flows through the plunger coil (2) located in
the field of a permanent magnet (3). At the
balance beam (1), the force of the plunger
coil, which is in proportion to the current, is
EXHAUST
OUTPUT 36
GAUGE (36)
1 Balance beam
2 Plunger coil
3 Permanent magnet
4 Zero point and span adjusters (not in
version without electronics)
5 Switch-off electronics: slide switch (only
with 4 to 20 mA version with electronics)
Fig. 3-1: Functional diagram
EB 6126 EN
1
2
3
4
ZERO SPAN
i
5
p
A

Design and principle of operation

balanced against the force of the dynamic
backpressure. The backpressure is produced
on the flapper plate (6) by the air jet leaving
the nozzle (7).
The supply air (SUPPLY 8) flows to the bot-
tom chamber of the volume booster (8). A
certain amount of air determined by the dia-
phragm position flows past the sleeve (9)
and leaves through the output (OUTPUT 36).
p
K
6 Flapper plate
7 Nozzle
8 Volume booster
8.2 Fixed restriction
9 Sleeve
10 Diaphragm
6
7
Type 6109/
Type 6112 i/p
Module
8
10
8.2
SUPPLY 8
9
3-1