A set of equipment (hereinafter referred to as KAWS) can be used as part of carriage, automobile, platform, bunker and other types of tensometric scales for static weighing. Scales can be used in various sectors of the national economy, including enterprises of industry, transport, trade, agriculture in the areas of distribution of state metrological control and supervision.
The set of equipment has been tested for electromagnetic compatibility as part of the ETM-VVT-S railcar strain gauge scales in accordance with the requirements of TU U28.2-35586777-001:2018 and complies with the requirements of DSTU EN 45501. .'' The hardware package has been tested for influencing factors. Test report No. 6/3393.P.458.V/12-18 of 11. 12. 2018
Certificate № UA.TR.113-0248-18.
Certificate № UA.TR.113-0248-18.
- Certificate № UA.TR.113-0248-18.
- Certificate № UA.TR.113-0248-18.
- Required set of connectors and fasteners.
- Required set of connectors and fasteners.
- Required set of connectors and fasteners.
- Service software that allows you to configure the weight processor using a computer.
- ZIP kit.
- Manual.
- Warranty obligations.
Weighing terminal - VT-7.00
The weighing terminal - VT-7.00 (hereinafter VT) is intended for use in scales built on strain gauges using a strain gauge digital converter ТЦП-6.00 (hereinafter ТЦП) in an amount of 1 to 4 pieces. VT Designed to service the load receiving device, which has from one to four load receiving platforms, on the load receiving platform there can be from one to four load cells.
The weighing terminal controls the weighing process, monitors and tests the operation of the strain gauge digital converter, strain gauges and communication lines.
VT controls the correctness of the program being executed, instrument settings, keyboard operation. The integrity of the communication line of the RS485 interface is checked, the compliance of the supply voltage with the TCP. The connection and overload of strain gauges, violation of the insulation of the strain gauge cable is controlled.
Scales are calibrated using a weighing terminal without external adjusting elements, while saving the settings codes in a memory device. Calibration is carried out using reference weights or electronically, by changing the weight coefficients and entering them into the VT memory.
The VT implements such additional weighting functions as the prohibition of zeroing, the determination of the displacement of the vehicle's center of gravity. Bulk cargo dosing control, dimension sensors connection (optional).
The number of measuring channels is from 1 to 16.
Discrete readings - 5, 10, 20, 50, 100 kg.
The number of connected devices via the RS485 interface is from 1 to 20.
BT has a seven-button multifunctional keyboard, a display consisting of two four-line LCD indicators.
BT has a seven-button multifunctional keyboard, a display consisting of two four-line LCD indicators.
RS485 interface for communication with TCP. It is possible to connect other devices, such as secondary display VD25-…. . Connection is carried out according to the protocol "ETM" - PS-09. The speed of information transfer over the communication channel - 9.6; 19.2; 38.4; 57.6; 115.2 kbps.
The length of the communication line of the RS485 interface for 4 connected TCP-6.00 with 16 strain gauges with a resistance of 800 Ohm at an output supply voltage of VT 24V and an exchange rate of 57.6 kbps .:
- using cable KPPE-VP 4x2x0.51 - 300m;
- using cable KPPE-VP 4x2x0.51 - 300m;
RS232 interface for communication with a computer or peripheral devices, information transfer rate over the communication channel - 9.6; 19.2; 57.6; 115.2 kbps. A null-modem cable up to 15m long is used for communication.
The USB interface is used for communication with a PC or peripheral devices, cable length up to 5m.
Also in the VT there is a discrete input signal with a DC voltage of 5-24V and a discrete output signal, switching alternating current 10A of voltage 240V and switching direct current 10A of voltage 28V. These functions have an optional implementation.
The time of changes in readings when the load changes does not exceed 1 s.
The time to establish reliable readings (from the moment of termination of loading to the moment of countdown) is no more than 10 s.
The time to establish the operating mode after power-on is 10 s.
The time of continuous work is not limited.
Supply voltage:
- from the alternating current network (220 + 22 / -33) V, (50 ± 1) Hz;
- from a direct current source 12 ÷ 24 V.
Power consumption (when working with four measuring processors) no more than 18 VA.
The weighing terminal is designed for operation in areas with a temperate and cold climate in irregularly heated rooms at temperatures from 10°C to 45°C. The upper value of relative humidity is 98% at 25°C.
Operating conditions in terms of the impact of mechanical factors in accordance with GOST 17516.1-90 - performance group M3.
The weighing terminal is not intended for operation in conditions of increased concentration of dust, splashes and water and has a design protected from ingress of solid bodies into its body. Degree of protection according to GOST 14254-80 - IP20;
The weighing terminal includes the following main functional elements:
The weighing terminal includes the following main functional elements:
The weighing terminal includes the following main functional elements:
The weighing terminal includes the following main functional elements:
– main and auxiliary liquid crystal indicators;
– main and auxiliary liquid crystal indicators;
– main and auxiliary liquid crystal indicators;
– main and auxiliary liquid crystal indicators;
– main and auxiliary liquid crystal indicators;
Tensometric digital transducer ТЦП-6.00
Strain gauge digital converter ТЦП-6.00 is an electronic device that performs analog-to-digital conversion of the output signal of the load cell, further data processing and transmits the measurement result in digital form via the RS485 interface to the weighing terminal - VT-7.00 ТЦП can be used individually, as it is functional finished device. ТЦП-6.00, for example, can be connected to a computer via the RS485 interface using the “ETM” protocol - PS-09.
TCP provides independent connection from 1 to 4 strain gauges. There is a built-in digital temperature sensor, the signal of which is used to correct the temperature error of strain gauges. In the advanced diagnostics mode of strain gauge sensors TCP-6.00 allows you to control their input, output resistance and violation of the sensor cable insulation.
The digital converter is configured using BT-7.00. All operating parameters: board serial number, ADC conversion factor correction, data transfer rate via RS485 interface, TCP address on the RS485 interface line, number of weight measuring channels are stored in internal non-volatile memory.
ТЦП-6.00 has an average (III) accuracy class according to DSTU EN 45501, the maximum number of verification graduations is 10000. Non-linearity is not more than 0.003%.
The TCP-6.00 uses a 24-bit sigma-delta proportional ADC with built-in digital filters. Measuring range ±4mV/V. The time of one measurement is no more than 43 ms, and the measurement cycle on 4 channels is no more than 200 ms.
ТЦП-6.00 has from 1 to 4 weight measuring channels, to which strain gauge sensors are connected. Several strain gauges connected in a parallel circuit can be connected to one measuring channel. 4-wire or 6-wire connection possible. The input-output resistance of strain gauges is from 120 to 1100 Ohm. The sensors are powered by a signal (meander) of alternating current with a voltage of 5V and a frequency of 425Hz.
The TCP has an RS485 interface, the transmission rate of information over the communication channel is 9.6; 19.2; 38.4; 57.6; 115.2 kbps.
The length of the communication line of the RS485 interface for 4 connected TCP-6.00 with 16 strain gauges with a resistance of 800 Ohm at a supply voltage of 24V and an exchange rate of 57.6 kbps.:
- using cable KPPE-VP 4x2x0.51 - 300m;
- using cable KPPE-VP 4x2x0.51 - 300m;
The length of the communication line of the RS485 interface for 4 connected TCP-6.00 with 16 strain gauges with a resistance of 800 Ohm at a supply voltage of 12V and an exchange rate of 57.6 kbps:
- The length of the communication line of the RS485 interface for 4 connected TCP-6.00 with 16 strain gauges with a resistance of 800 Ohm at a supply voltage of 12V and an exchange rate of 57.6 kbps:
Supply voltage:
– 7…24 V DC;
– 7…24 V DC;
- – 7…24 V DC;
- – 7…24 V DC;
Operating temperature -30…+70 С.
Structurally, ТЦП-6.00 is made in a cast aluminum case of rectangular shape on the cover, which has hermetic connectors from Hirschmann for connecting cables of strain gauges and cables connecting ТЦП-6.00 with VT-7.00.
IP65 protection class.
IP65 protection class.
A set of equipment for static weighing can be equipped with the following additional devices manufactured by ETM.
The secondary display VD-25-… is an additional peripheral device that repeats the weighing result and other primary indications. The display has 6 LED seven-segment indicators 25mm high, 8 LEDs, a functional keyboard. Working temperature range from -30°С to 70°С, degree of protection against external influences IP65, connected via RS485 interface.
Remote display panel TV1-120-… is an additional peripheral device that repeats the weighing result and other primary readings. The display has 6 LED seven-segment indicators 127mm high and 2 functional LEDs. Working temperature range from -30°С to 70°С, degree of protection against external influences IP65, connected via RS485 interface.
Radio modem RM-7.00… is a device that provides communication between VT-7.00 and TCP-6.00 via radio channel. The communication range is 200 - 1300m, depending on the type of antennas used. The radio modem operates on an unlicensed frequency of 433 MHz with an unlicensed power of up to 10 mW. The package includes two transceiver modules, a power supply, antennas, and a set of connecting cables. Working temperature range from -30°С to 70°С, degree of protection against external influences IP65. Serves for "transparent" replacement of the RS485 interface cable.
The kit can have a certified explosion-proof design using an additional spark protection module BI-1.
The VT-7.00 weight processor can be optionally equipped with a display based on OLED indicators, which makes it possible to expand the operating temperature range from -20 ° C to 45 ° C.
BT-7.00 has a modification that allows you to work with Flintec digital sensors of the RC3D series. From 1 to 16 such sensors can be connected to the VT, while the ideology of working with the weighing terminal is fully preserved.