Detailed Product Description

TWO-WIRE PROGRAMMABLE TEMPERATURE TRANSMITTER BTT784

 

• Compact High Performance
• Fits Standard Small Heads
• 0.1% Accuracy error
• Fully Programmable
• Any Temperature Range within Limits
• Output Linear with Temperature (RTD)
• Loop-powered
• Adaptor for DIN Rail Mounting (type B)
• Accessories and Sensors Available

FUNCTION

The BASI temperature transmitter series BTT784 is a compromising solution between the analog transmitters with fixed range and programmable transmitters. BTT784 transmitters allow on-site selecting input range and sensor type (for thermocouples) as well as transmitter

reaction to sensor break by means of a group of soldering bridges (jumpers). The exact range can be adjusted by 'zero' and 'span' potentiometers. These transmitters have a special plastic cover to protect solder jumpers from the environment. Various mounting options,are available: in sensor protection head type "B", in a boxwith high protection class, or on a DIN rail. This series of transmitters is also applicable in Ex zones using external Zener barrier. Due to their flexibility, excellent resistance against electromagnetic disturbances, and low price, the

BTT784 transmitters are easy-to-use and very widely applicable

.

SPECIFICATIONS GENERAL

INPUT

Pt100 (w=1.385), 3-wire : -50 -+ 600 deg C

Thermocouple "E" : 0- +600 deg C

Thermocouple "J": 0- +800 deg C

Thermocouple "K": 0- +1200 deg C

Thermocouple "L": 0- +700 deg C

Thermocouple "L-GOST": 0- +600 deg C

Thermocouple "N": 0- +600 deg C

Thermocouple "T": 0- +1200 deg C

Range selection: Jumpers

Thermocouple selection: Jumpers

Zero adjustment: +/- 50 %

Range adjustment: +/-10%

OUTPUT

Signal type: 4 to 20 mA

RTD output proportional to: Temperature

TC output proportional to: Input voltage

Current limit: Low=3mA, High=28mA

Current limit selection : Jumpers

Sensor break RTD: Low or High depends on terminnal

Sensor break TC: High=28mA

 

ACCURACY

Measurement error: +/-0,15 % from span

Nonlinearity: +/-0,1 % from span

Temperature drift: 0.02 % from span for 1 °C

Cold junction compensation: Automatic hardware ± 1 °

 

POWER SUPPLY

For standard type: 8 to 30VDC

Admissible variations: 4 Vp-p@24V/20mA

Max. line load: Max. 620. @ 24V/20mA

 

OPERATING CONDITIONS

Operating temperature: -30 to 80 °C

Operating humidity: 0 to 95%RH, non-condensing

EMC: EN50081-1, EN50082-2, 89/336/EEC

UL: E252086

 

DESIGN AND MATERIALS

Case material: Plastic

Wiring: Screw terminals

Central opening(in-head): Diam 5mm

Mounting in head: Diam.44 x19mm (type B) IP20

Mounting on rail: 18 x90x58mm (type C) IP20 80x80x60mm (type D) IP65

 

ORDERING CODE

BTT784

TEMP.TYPE         MOUNTING

B Pt-100              B Head type

C Thermocouple   C DIN-rail

                           D IP65 box