Knick SensoGate WA131M, Руководство пользователя

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SensoGate WA131M
20
2.7 Limit Positions
2.7.1 SERVICE and PROCESS Position
SensoGate WA131M can assume two limit positions (SERVICE or PROCESS position).
SERVICE position
• The sensor is not in contact with the process medium.
• The sensor can be installed, removed, and, as necessary, cleaned while the process is running.
1)
• The measuring system can be calibrated and adjusted. 1)
PROCESS position
• The sensor is in contact with the process medium.
• The desired process parameters can be measured.
When using versions of SensoGate WA131M with electronic limit signal, a contact is closed when a
limit position is reached at the limit switch. An electrical signal, e.g. at the control center, can be dis-
played when the limit position is reached.
➜
Limit Switch, p. 21
The limit positions are indicated in different ways depending on the version of SensoGate WA131M used.
Solid-electrolyte sensor,
short immersion depth
Solid-electrolyte sensor,
long immersion depth
Liquid-electrolyte sensor,
short immersion depth
1
2
3
1
2
4
1
2
5
SERVICE PROCESS SERVICE PROCESS SERVICE PROCESS
In the SERVICE position, the sensor
head
(3)
is visible at the top end of
the protection sleeve.
In the SERVICE position, the service
cap
(4)
is visible at the top end of
the extension.
In the SERVICE position, the bel-
lows
(5)
are expanded.
In the PROCESS position, the sensor
head
(3)
is retracted into the protec-
tion sleeve.
In the PROCESS position, the service
cap
(4)
is retracted into the exten-
sion.
In the PROCESS position, the bel-
lows
(5)
are compressed.
In both limit positions, the rotating
c
ollar (2)
is locked and the safety
lock butt
on (1)
is not depressed.
In both limit positions, the rotating
c
ollar (2)
is locked and the safety
lock button
(1)
is not depressed.
In both limit positions, the rotating
c
ollar (2)
is locked and the safety
lock button
(1)
is not depressed.
1)
Availability of functions is dependent on the version ordered
➜
Product Code, p. 12