Contents
1
Models
2
Safety warnings
3
Mounting
4
Electrical connections
5
Maintenance
6
Notes for mounting and
operating in hazardous area
7
Safety-engineering values
8
Declaration of conformity
1
Models
2
Safety warnings
1
Models
2
Safety warnings
When mounting, initiating and operating
these transmitters it is important to observe
the safety precautions and regulations
(e.g. IEC 60 364-6-61).
Nonobservance of the applicable regula-
tions may cause severe injury to persons
or damage to equipment.
Only staff with suitable qualification should
work with these transmitters.
We draw your attention to the following
which must be observed with transmitters
with Ex protection:
l
Observe the applicable regulations for
the use of Ex-class instruments (e.g.:
EN 50 014, EN 50 020, EN 50 021,
EN 50 284).
l
Observe the notes for mounting and
operating in hazardous area described
in section 6 .
l
It is forbidden to use a transmitter that
is damaged externally.
l
Repairs are forbidden.
Operating Instructions
Temperature Transmitter Model T31
Alexander-Wiegand-Straße 30
63911 Klingenberg / Germany
Phone
( +49) 93 72 / 132-0
Fax
( +49) 93 72 / 132-406
info@wika.de
www.wika.de
Alexander Wiegand GmbH & Co. KG
Specifications according to WIKA
data sheet T E 31.01.
Technical alteration rights observed.
Issue: May 2006
2294851.03 05/2006 D + GB T31
Issue: May 2006 Page 1 of 2
Operating Instructions
Note
Before initial operation check the suitabil-
ity for the intended application.
In particular, it is important to fulfill the am-
bient and operation conditions as specified
in the WIKA data sheet TE 31.01 .
5
Maintenance
The temperature transmitters described
here are totally maintenance-free !
The electronics are completely encap-
sulated and incorporate no components
which could be repaired or replaced.
4.3
Connect 4 ... 20 mA - loop
The electrical connection is made
through the terminals
j
and
i
.
4 ... 20 mA -
loop
Input
4 ... 20 mA -
loop
Input
4.2
Input Pt100 3 wire
3.2
Mounting in connecton head
Inser t the measuring inser t with the
mounted transmitter in the protective
sheath and affix in the connecting head
using screws in pressure springs.
3.1
Mounting on measuring insert
The transmitter can be mounted on the cir-
cular plate of the measuring insert using
two countersunk head M 3 screws per
DIN EN 2009 .
Appropriate threaded inserts have been
press-fitted in the underside of the case.
Assuming the countersinking is carried out
correctly, the permissible screw length can
be calculated as follows:
l
max.
= s + 4 mm
Dimensions in mm:
l
max.
length of screw
s
thickness of circular plate
Check the screw length before affixing the
transmitter to the measuring insert:
stick the screw in the circular plate
and verify additional length of 4 mm !
Circular plate
WARNING
Do not exceed the maximum allowable
screw length !
The transmitter will be demaged if the
screws are screwed further than 4 mm
into the bottom of the transmitter.
3
Mounting
3
Mounting
3.0
General
These transmitters are designed to be
mounted on a measuring insert in a DIN
connecting head with form B.
The connecting wires of the measuring in-
sert must be approx. 40 mm long and in-
sulated.
Mounting example:
3.1
Mounting on measuring insert
3.2
Mounting in connection head
4.3
Connect 4 ... 20 mA - loop
5
Maintenance
4
Electrical connections
4
Electrical connections
! ! ! Important ! ! !
In the case of the transmitters described
here there is an internal galvanic connec-
tion between the sensor input and ana-
logue output.
No external conducting is to be made (for
example, by earthing) between the con-
nected temperature sensor and analogue
output !
4.0
General
The transmitters have connecting terminals
for electrical connection.
We recommend the use of crimped con-
nector sleeves in the case of flexible leads.
4.1
Input Pt100 2 wire
Set a jumper between the input terminals
and
. Otherwise the transmitter sig-
nals a sensor burnout and sets the output
signal
≥
22.5 mA.
l
maximum permissible terminal voltage:
30 V
l
maximum permissible load R
A
(dependent upon the loop power sup-
ply voltage U
B
)
925
Ω
Ω
Ω
Ω
Ω
at
30 V power supply U
B
625
Ω
Ω
Ω
Ω
Ω
at
24 V power supply U
B
R
A
≤
(U
B
- 11.5 V ) / 0.02 A
with
R
A
in
Ω
and U
B
in V
Load diagramm
The permissible load R
A
dependent
upon the loop power supply voltage U
B
.
0 11.5
20
24
30
voltage U
B
in V
à
925
625
0
load
R
A
in
Ω
à
Temperature Transmitter Model T31
Head mounting
Ex protection
T31.10. 1P0
without
1P2
II 1G EEx ia
1P4
II 2G EEx ib
1P9
II 3G EEx nL/ nA
