Multipoint thermocouple installation and debugging

Multipoint thermocouple is suitable for the production site temperature gradient was not significant, must at the same time in more than location or position measurement. Multipoint thermocouple is widely used in large chemical fertilizer in synthetic tower, storage tanks and other equipment. So how to install and debug? Please see the following specific steps:

multi-point thermocouple installation steps

a, determine the internal layer of bed hydrogenation reactor and packing installed

b, determine the reactor internal scaffolding lap over.

c, determine the reactor internal construction with a lighting installation.

g, on the basis of 22 points thermocouple detecting element distribution ( As shown in figure 1) And reactor internals, detecting the multipoint thermocouple elements specialized clip for installation: first of all, professional engineers based on thermocouple elements to the special clamp fixed position detection, and then by a professional welder for welding clamp ( Argon arc welding) Fixed and anticorrosive processing.

e, thermocouple hoisting and fasteners, fixed point 22.

f, 22 point laying thermocouple measurement: according to each of detecting element and multipoint thermocouple testing point distribution, using pipe bender to laying of thermocouple detecting element, the end is fixed in the special welding beforehand good clip.

d, remove the scaffolding and temporary lighting, and clean up the reactor internal trash, confirmed by the supervision, party a and the owner after passing to cap the reactor.

multi-point thermocouple debugging

in the equipment before putting-in-service proactively to system debugging of multi-point thermocouple, in the process of system debugging, if there are any DCS temperature display in one of the thermocouple measuring temperature lower than the actual temperature, should first consider the wiring is correct. After spot checks found only the thermocouple junction compensation wire is negative, then compensation conductor should be properly connected, thereby eliminating the instrument failure state. Now let's take a specific analysis of the following compensation conductor on thermocouple reverse why DCS, low temperature display.