Key facts
- Manuals
- 11
- Models
- 4
- Languages
- ZH · EN
- Last added
- 2026-10-03
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Featured yaohua manuals
Yaohua XK-3190 RF Wireless Module Product Overview
The document discusses the application of wireless transmission technologies—ordinary RF, Zigbee and GSM/GPRS—in weighing instrument systems. It highlights the market demand for remote monitoring, data centralization and the advantages of wireless over wired connections, especially in harsh environments.
Specific details are provided for each technology: RF operates in the 433 MHz band with a range of up to 1–2 km; Zigbee uses the 2.4 GHz band with self‑organizing mesh networking; GSM/GPRS enables long‑distance communication via cellular networks and can be integrated through a GPRS DTU module. This manual is written in Chinese.
Covers: Overview · Significance of Wireless Transmission in Weighing Systems · Ordinary RF Wireless Transmission · Zigbee Wireless Transmission · GSM/GPRS Wireless Transmission · GPRS DTU Connection Method
Yaohua XK3190-A27E Weighing Indicator User Manual
The XK3190-A27E is a weighing indicator designed for industrial scales. It offers analog input, optional RS232 serial output, and a scoreboard interface, with a display range of -99999 to 999999 and selectable scale divisions.
The manual covers installation of the load‑cell connection, wiring of the serial and scoreboard interfaces, key functions such as ZERO, TARE, and data accumulation, as well as maintenance, battery charging, and warranty information.
Covers: Technical Parameter · Installation and Connection · Loadcell Connection · Serial Communication Interface and Scoreboard · Operation Instruction · Calibration Description
Yaohua DY XXSXXX-1W DC-DC Converter Technical Manual
The DY XXSXXX-1W series is an isolated fixed‑output DC‑DC converter offering small size, high efficiency, high isolation voltage, and low cost. It is suited for digital signal processing circuits and analog circuits with modest voltage‑stability requirements, especially in distributed power‑supply systems.
The manual lists key electrical characteristics such as 1000 VDC insulation strength, 1 W full‑load output power, selectable output voltages from 3.3 V to 30 V, and typical efficiencies of 80 % (minimum 70‑75 %). It also includes operating notes on load conditions, short‑circuit protection, ripple control, and guidelines for parallel operation of multiple converters. This manual is written in Chinese.
Covers: General Characteristics · Input Characteristics · Output Characteristics · Typical Characteristics Curve · Package Dimensions · Operating Notes
Yaohua DY XXDXX-3W DC-DC Converter Technical Manual
The DY XXDXX-3W series from Yaohua are isolated, fixed‑voltage DC‑DC converters with small size, high efficiency, high isolation voltage and low cost. They are suited for digital signal processing circuits, low‑precision analog circuits, distributed power systems and low‑power applications.
The manual provides electrical parameters, recommended load conditions, protection guidelines, and design tips such as ripple reduction, parallel operation, and polarity protection. It also includes recommended LC filter values for various input and output voltage options. This manual is written in Chinese.
Covers: General Features · Input Characteristics · Output Characteristics · Recommended Load Conditions · Protection and Safety Notes · Ripple and Noise Management
Latest yaohua manuals
Yaohua XK-3190 RF Wireless Module Product Overview
Product Leaflet 4 pages · 185 KB · ZHAn overview of the XK-3190 wireless module, covering RF, Zigbee and GPRS transmission options for weighing systems.
Yaohua XK3190-A27E Weighing Indicator User Manual
User Manual 13 pages · 5.1 MB · ENThe Yaohua XK3190-A27E weighing indicator user manual provides technical specifications, installation, operation, and maintenance instructions.
Yaohua DY XXSXXX-1W DC-DC Converter Technical Manual
User Manual 3 pages · 212 KB · ZHThe Yaohua DY XXSXXX-1W DC-DC converter technical manual provides specifications, operating guidelines, and safety notes for the 1 W isolated fixed‑output…
Yaohua DY XXDXX-3W DC-DC Converter Technical Manual
Datasheet 3 pages · 358 KB · ZHTechnical manual for Yaohua DY XXDXX-3W series DC-DC converters, covering specifications, input/output characteristics and usage notes.
Yaohua KDY XXDXXXX-2W Service Manual
Service Manual 4 pages · 336 KB · ZHTechnical manual for Yaohua KDY XXDXXXX-2W isolated wide‑voltage input regulated power supply, covering features, specifications, and safety notes.
yaohua WDY XXSXX-1W series products service Guide
Service Manual 3 pages · 378 KB · ZHTechnical manual for Yaohua WDYXXSX-1W series DC‑DC converters covering specifications, operation, and safety guidelines.
Yaohua KDY XXSXX-2W Series Service Manual
Service Manual 4 pages · 418 KB · ZHService manual for the Yaohua KDY XXSXX-2W series covering specifications, safety notes, and wiring guidelines.
yaohua DY XXSXX-W5 series products service manual
Service Manual 3 pages · 335 KB · ZHThe Yaohua DY XXSXXX-W5 service manual provides specifications, electrical characteristics, dimensions, and usage guidelines for the isolated DC‑DC…
Yaohua DY XXDXX-W1/W2/W5 Series Service Manual
Service Manual 3 pages · 318 KB · ZHTechnical service manual for Yaohua DY XXDXX-W1/W2/W5 series DC-DC converters, covering specifications, operating guidelines, and safety notes.
Yaohua WDY XXSXX-1W Series DC-DC Converter Service Manual
Service Manual 3 pages · 395 KB · ZHTechnical manual for Yaohua WDY XXSXX-1W DC-DC converters covering specifications, features, and usage notes.
yaohua GDY XXSXX-W5 series products service manual
Service Manual 3 pages · 318 KB · ZHTechnical manual for Yaohua GDY-XXS-W5 series DC‑DC converters with specifications, usage notes and safety precautions.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Datasheet
Ratings, dimensions and ordering codes, for selection and design work.
Service Manual
Disassembly, diagnostics and part numbers, for repair.
Questions answered in yaohua manuals
What wireless technologies are compared for the XK-3190 module?
The document compares ordinary RF, Zigbee and GSM/GPRS wireless transmission methods.
What is the typical transmission distance of the RF mode?
The RF mode can reach a distance of about 1 to 2 km under clear conditions.
What load condition is recommended for optimal performance?
For long‑term use, keep the load between 30 % and 80 % of full load; if the circuit is often idle, add a constant load of about 20 %.
How can ripple be reduced for noise‑sensitive applications?
Add an output filter capacitor not exceeding 10 µF, or insert an inductor with a small capacitor; refer to the table for suitable component values.
Does the module have short‑circuit protection?
Yes, the output stage includes self‑recovering short‑circuit protection.
Can multiple modules be paralleled for higher current?
Parallel operation is not recommended for this module.