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1. Features
The amplifier type TX 1 is an accurate and economic load cell transmitter, easy to
integrate into process control systems. By its “digital heart” – modern microcontroller
technology – type TX 1 allows a comfortable calibration and set up with a combination of
LED’s and push buttons. Option equipped TX 1 can be programmed and calibrated via PC
software xFace.
The analogue signal output is programmable to 0 – 10 V or 4 – 20 mA. An opto-isolated
interface option offers 2 setpoints, 1 error output, 1 input for zeroing by external command
and one RS232C serial data output for setup & calibration.
TX 1 has important advantages listed below:
• It is a rail mounted device which can be easily installed in control panels. Its
physical dimensions allow reasonable space advantage in the panel.
• Very easy and user friendly digital adjustment and programming via keys located on
the front panel.
• In case of Error, user is warned by Error LED on front panel and optional Error
output signal is activated. Analogue output goes out of the operating range.
• Via optional zeroing input, TX 1 can be zeroed by PLC or any other external device.
• eCal calibration and setup without weights via optional serial port and PC software.
1.1. Technical Specification
INPUT & A/D CONVERTER
Linearity % 0.01 or better
Analogue input range 0 mV to 20 mV
Min. input range < 1 mV
A/D Converter 24 bit Delta-Sigma ratiometric with integral analog and digital filters
Resolution Min. 0.50 µV/count
Internal resolution Min. 8 000 000 counts
Conversion rate
Up to 100 measurements per second at TX 1
Up to 400 measurements per second at TX 1W
SCALE CALIBRATION & ANALOGUE OUTPUT
Calibration
Performed with keys. There is no any switch or resistor for adjustment in
the instrument
Digital Filter
2 step adjustable digital adaptive filter at TX 1
9 step adjustable digital adaptive filter at TX 1W
Weighing Functions Zeroing via opto-isolated digital input (only TX 1W)
D/A Converter 16 bit
Analogue output Current output 4-20 mA or voltage output 0-10 V
Set point 2 programmable free setpoints (only TX 1W)
input / output
2 opto-isolated outputs for setpoints and 1 opto-isolated input for zeroing
(only TX 1W)
LOAD CELLS
Excitation 5 V DC
Number of Load Cells
Up to 4 units of 350 Ω or 12 units of 1100 Ω (min. 85 Ω)
Connection 4 or 6 wire technique. Cable length 274 m/mm² for 6 wire connection
SETUP & COMMUNICATION
Front panel Membrane keypad including 2x LED and 3x programming keys
eCal Calibration without weights by PC software (only TX 1W)
POWER
Power supply 230 V AC, 50 Hz , 6 VA or 24 VDC 0.2 A
ENVIRONMENT AND ENCLOSURE
Operation Temperature
Between -10 °C and +40 °C at 85% RH max, non-condensing
Enclosure Polyamide, for DIN-rail mount, IP20
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