WIKA TGT73

WIKA TGT73 – (Gas-atuated thermometer with lectric output with electric output signal) WIKA/Germany

GAS-ACTUATED THERMOMETER WITH ELECTRIC OUTPUT CONTACT WIKA TGT73

Applications

Chemical, petrochemical industry
Oil and gas industry
Power engineering, renewable energies
Machine building, plant and vessel construction

Special features

Cost-effective “2 in 1” temperature measurement
Compact design
Application ranges from -200 … +700 °C
“Plug-and-play”, thus no transmitter configuration necessary

Description

Wherever the process pressure has to be indicated on-site and, at the same time, a signal transmission to the central control or remote centre is desired, the model TGT73 intelliTHERM® can be used.

Through the combination of a mechanical measuring system and electronic signal processing, the process temperature can be read reliably, even if the voltage supply is lost.

Due to the wide variety of possible designs, the model TGT73 gas-actuated thermometers can be perfectly adapted to any process connection or location. With the adjustable stem and dial version, the case can be adjusted precisely to the desired viewing angle. With the contact bulb version (without direct contact with the medium), the temperature can be measured and controlled even when the pipe diameter is extremely small.

The electronic WIKA transmitter, integrated into the high-quality mechanical temperature measuring instrument, combines the advantages of electrical signal transmission with the advantages of a local mechanical display.

The measuring span (electrical output signal) is adjusted automatically with the mechanical display, i.e. the scale over the full scale range corresponds to 4 … 20 mA.

A 4 … 20 mA version is available for use in hazardous areas.

Measuring element	Inert gas expansion system
Nominal size in mm	■■ 100 ■■ 160
Instrument version	■■ Back mount (axial) ■■ Lower mount (radial) ■■ Back mount (adjustable stem and dial) ■■ Instruments with capillaries
Connection design	■■ S Standard (male threaded connection) ■■ 1 Plain stem (without thread) ■■ 2 Male nut ■■ 3 Union nut ■■ 4 Compression fitting (sliding on stem) ■■ 5 Union nut and loose threaded connection ■■ 6 Compression fitting (can be adjusted on either capillary or spiral protective sleeve) ■■ 7 Compression fitting at the case
Unit (scale range)	°C Option: ■■ °F ■■ °C/°F (dual scale)
Process connection	■■ Plain, without thread ■■ G ½ B ■■ ½ NPT ■■ G ½ female ■■ ½ NPT female ■■ M20 x 1.5 ■■ M24 x 1.5 female others on request
Accuracy class	Class 1 per EN 13190 at 23 °C ±10 °C ambient temperature
Rated operating ranges and conditions	EN 13190
Stem diameter	8 mm Option: ■■ 6 mm ■■ 10 mm ■■ 12 mm others on request
Working range
Continuous load (1 year)	Measuring range (EN 13190)
Short time (max. 24 h)	Scale range (EN 13190)
Window	Laminated safety glass
Contact bulb	120 x 22 x 12 mm Stainless steel 1.4571
Adjustable stem and dial	Stainless steel Swivelling 90° 360° rotatable
Capillary	Ø 2 mm, stainless steel 1.4571, bending radius no less than 6 mm Standard capillary: max. 60 m Capillary with spiral protective sleeve: max. 40 m Capillary with PVC coating: max. 20 m Length to customer specification Option: Armoured coating for capillary (Ø 7 mm spiral protective sleeve, flexible or PVC-coated)
Mounting types for instruments with capillary	■■ Surface mounting flange, stainless steel ■■ Instrument mounting bracket, aluminium die-casting ■■ Panel mounting flange, stainless steel
Dampening (option)	With liquid dampening
Reverse polarity protection	Yes
Wetted materials
Process connection	Stainless steel 304SS
Stem	Stainless steel 316SS
Non-wetted materials
Case, ring	Stainless steel 304SS
Dial	Aluminium, white, black lettering
Pointer	Aluminium, black, adjustable pointer
Ingress protection per IEC/EN 60529	IP65
Permissible temperatures
Ambient	-20 … +60 °C [-4 … +140 °F] without/with liquid dampening
Storage and transport
Without liquid dampening	-50 … +70 °C [-58 … +158 °F]
With liquid dampening	-40 … +70 °C [-40 … +158 °F]
Permissible operating pressure at the stem	max. 25 bar, static
Electrical connection	Angular connector
Power supply UB 4 … 20 mA 4 … 20 mA (Ex version) 0 … 10 V	DC 12 ≤ UB ≤ 30 V DC 14 ≤ UB ≤ 30 V DC 15 ≤ UB ≤ 30 V
Influence of power supply	≤ 0.1 % of full scale/10 V
Permissible residual ripple	≤ 10 % ss
Permissible max. load RA	RA ≤ (UB – 12 V)/0.02 A with RA in Ω and UB in V, however max. 600 Ω
Effect of load	≤ 0.1 % of full scale
Output signal (variant I)	4 … 20 mA, 2-wire, passive, per NAMUR NE43
Output signal (variant III)	0 … 10 V, 3-wire
Safety-related maximum values (variant II) Power supply Ui Short-circuit current Ii Power Pi Internal capacitance Ci Internal inductance Li	max. DC 30 V max. 100 mA max. 0.72 W 12 nF negligible
Impedance at voltage output	0.5 Ω
Load capacity at voltage output	2 … 100 kΩ
Sampling rate sensor	600 ms
Linear error	≤ 1.0 % of span (terminal method)
Output signal accuracy	0.2 % of full scale value (only electronics)
Resolution	0.15 % of full scale (10 bit resolution at 360°)
Refresh rate (measuring rate)	> 1/s
Input signal, angle of rotation	0 … 270 ∢ °
Long-term stability of electronics	< 0.3 % of full scale/a
Temperature error of electronics	< 0.3 % of full scale value/10 K (in overall temperature range)
Warm-up time	≤ 5 min
Electrical connection	Via angular connector, 180° rotatable, max. 1.5 mm², cable protection, M20 x 1.5 cable gland, cable outer diameter 7 … 13 mm, incl. strain relief
Designation of connection terminals dependent on the output signal version	Terminal Type 1 2 3 4 5 6	Variant I 4 … 20 mA GND I+ reserved reserved reserved reserved	Variant II (Ex version) 4 … 20 mA GND I+ reserved reserved reserved reserved	Variant III 0 … 10 V GND UB+ Uout reserved reserved reserved