SITRANS TO500, multi-point temperature transmitter

SITRANS TO500 is a multi-point temperature transmitter for measuring temperatures and temperature profiles using fiber optic multipoint temperature measurement lances.

Область применения

SITRANS TO500 is used for evaluating a large number of sensors arranged on a fiber optic multipoint temperature measurement lance.

Up to 4 measurement lances with up to 48 sensors each can be processed simultaneously by a SITRANS TO500.

Accurate and fast determination of temperature profiles enables process optimization in terms of service life, quality and output.

Locations of excessive temperature rise are quickly and accurately detected, thereby preventing damage to the process, equipment and environment.

Wherever temperature profiles must be determined and installation space is limited, the SITRANS TO500 and fiber optic temperature measurement are the right choice.

Дизайн

The SITRANS TO500 multi-point temperature transmitter is located in the control cabinet in a compact aluminum enclosure for mounting onto DIN rails.

The connectors are easy to access on the front:

4 x connector for measurement lances
1 x connector for power supply
1 x connector PROFIBUS DP
1 x connector Ethernet

The status displays are also located on the front.

Способ действия

In the SITRANS TO500 multi-channel temperature transmitter, light is generated in the wavelength of 1500 to 1600 nm and output to the measurement lance by means of a continuously tunable laser light. Fiber Bragg gratings (FBG) are mounted at defined measurement points on the measurement lances. Each fiber Bragg grating reflects light of a defined wavelength. The wavelength reflected by the fiber Bragg grating varies as a function of temperature. The reflection at the fiber Bragg gratings is thus a measure of the temperature at the respective measurement point. A maximum of 20 to 48 fiber Bragg gratings per channel can be evaluated, depending on the temperature range.

A gas cell with fixed absorption line serves as a reference in the SITRANS TO500 and the wavelength determination is continuously adjusted by it.

Функции

The SITRANS TO500 has 4 channels which are evaluated simultaneously. The wavelength reflected at each sensor in the multipoint temperature measurement lance depends on the temperature, and this wavelength is output in the multi-point temperature transmitter. The temperature can be determined and displayed accurately at up to 48 sensors per channel. The positions of the sensors can be specified by the customer. This leads to a flexible and application-specific solution for the customer.

The measured temperatures are transferred to the control system via PROFIBUS DP. The parameters of the SITRANS TO500 are set via the integrated Ethernet interface.

Чертеж

SITRANS TO500 dimensions in mm (inch)

Особенности

Fast response to temperature changes
Exact, no recalibration required due to internal reference
Easy to install
Low space requirement of the measurement lances
Evaluation of a large number of sensors (fiber Bragg grating (FBG)) in one temperature transmitter
Sensor arrangement freely selectable
Measurement lance length freely selectable
Also suitable for high process temperatures

Схема подключения

SITRANS TO500, connector assignment

Технические данные

Multi-point temperature transmitter SITRANS TO500
Input
Multipoint temperature measurement lance	Connection to 4 channels
Measured variable	Temperature
Input type	max. 48 sensors (FBGs) per channel
Characteristics	Temperature-linear
Resolution	0.1 K
Measuring accuracy	< 0.5 K
Repeatability	< 0.5 K
Measuring cycle	< 1 s
Measuring range	‑180 ... +800 °C (‑292 ... +1472 °F) depending on the measurement lance
Unit	°C
Output
Output signal	PROFIBUS DP
Power supply	24 V DC + 20 %
Power consumption	Max. 15 W
Protection	Against reverse polarity
Measuring velocity
Measurement rate	1 Hz independent of the number of FBGs
Optical power	≤ 1 mW per channel
Laser protection class	Class 1
Rated conditions
Ambient conditions
Ambient temperature	0 ... 50 °C (32 ... 122 °F)
Storage temperature	-40 ... +85 °C (-40 ... +185 °F)
Relative humidity	< 80%, non condensing at 50 °C (122 °F)
Electromagnetic compatibility	According to EN 61326 and NAMUR NE21
Degree of protection to EN 60529
Enclosure	IP21
Design
Weight	2.4 kg (5.3 lb)
Dimensions	See "Dimensional drawings"
DIN rail adapter	Rear-mounted
Material	Aluminum
Displays and control elements
LEDs	"Power-on" (continuous light) "Status" (flashing during startup; otherwise continuous light)
Pushbutton	"Reset" (system restart or address reset)