WIKA TR12-B TR12-M 过程热电阻温度计 配保护套管 防爆Ex d Ex i
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- 隔爆型热电阻
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产品详细介绍
wika tr12-b tr12-m 过程热电阻温度计 配保护套管 防爆ex d ex i
process resistance
thermometer
model tr12-b, for additional thermowell
model tr12-m, basis module
fig. left: process
resistance thermometer model tr12-b
fig. right: basis module model tr12-m
applications
■ chemical industry
■ petrochemical industry
■ offshore
■ plant and vessel construction
special
features
■ for many variants of
temperature transmitters with field transmitter
■ for mounting in all standard thermowell
designs
■ spring-loaded measuring insert
(replaceable)
■ explosion-protected versions ex d, ex
i
description
resistance thermometers in this
series can be combined with a large number of thermowell designs.
the replaceable, centrically spring-loaded measuring insert and its
extended spring travel enable combination with the widest range
of
connection head designs.
a wide variety of possible combinations of
sensor, connection head, insertion length, neck length, connection
to thermowell etc. are available for the thermometers; suitable for
any thermowell dimension and any application.
specifications
neck tube versions
measuring insert
the
exchangeable measuring insert is made of a vibrationresistant
sheathed measuring cable (mi cable).
the diameter of the measuring insert should be
approx. 1 mm smaller than the bore diameter of the thermowell. gaps
of more than 0.5 mm between thermowell and the
measuring insert will have a negative effect on the heat transfer,
and they will result in unfavourable response behaviour from the
thermometer.
when fitting the measuring insert into a
thermowell, it is very important to determine the correct insertion
length (= thermowell length for bottom thicknesses of ≤ 5.5 mm).
the measuring insert should be spring-loaded (spring travel: 0 ...
20 mm) in order to ensure that it presses against the bottom of the
thermowell.
neck
tube
the neck tube is screwed
into the connection head or the case. the neck length depends on
the intended use. usually an isolation is bridged by the neck tube.
also, in many cases, the neck tube serves as a cooling extension
between the connection head and the medium, in order to protect any
possible built-in transmitter from high medium temperatures.
in the ex d version the flameproof joint is
integrated in the neck tube.
thermowell selection
transmitter (option)
explosion protection
for
application in hazardous areas, corresponding versions are
available.
intrinsic
safety
the instruments comply with
the requirements of 94/9/ec
(atex) directive for gas.
flameproof
enclosure
these instruments comply with the requirements
of 94/9/ec (atex) directive or iecex for gas.
the
classification/suitability of the instrument (permissible power
pmax as well as the permissible ambient temperature) for the
respective category can be seen on the ec typeexamination
certificate or on the iecex certificate and in the operating
instructions.
built-in transmitters have their own ec type-examination
certificate. the permissible ambient temperature ranges of the
built-in transmitters can be taken from the corresponding
transmitter approval.
functional
safety (option)
in
safety-critical applications, the entire measuring chain must be
taken into consideration in terms of the safety parameters. the sil
classification allows the assessment of the risk reduction reached
by the safety installations.
selected tr12 process resistance thermometers in
combination with an appropriate temperature transmitter (e.g. model
t32.1s) are suitable as sensors for safety
functions up to sil-2.
matched thermowells allow easy dismounting of
the measuring insert for calibration. the optimally tuned measuring
point consists of a thermowell, a tr12
thermometer and a t32.1s transmitter developed in accordance with
iec 61508. thus, the measuring point provides maximum reliability
and a long service life.
electrical
connection
(colour code per iec 60751)
ordering
information
model / explosion
protection / ignition protection type / sensor /
sensor specification / thermometer operating
range / terminal box / thread size at the cable entry / cable entry
/ transmitter / neck tube version / connection to housing,
connection head / connection to thermowell / neck tube length n(mh)
/ insertion length a / measuring insert / options
欢迎致电咨询订购wika tr12-b tr12-m 过程热电阻温度计 配保护套管 防爆ex d ex i
电话:010-51669912 56291930
传真:010-51669912
1491421115 2636968574
邮箱:sales@zoriver.cn
公司官网:http://www.zoriver.com.cn http://www.zoriver.cn
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