Key facts
- Manuals
- 2
- Languages
- ZH
- Last added
- 2026-09-29
Featured Top Instrument manuals

TOP Instrument YYD-1 Stem Strength Tester User Manual
The YYD-1 stem strength tester is designed for agricultural research, allowing measurement of stem strength in crops such as corn, sorghum, and tobacco to evaluate lodging resistance. It connects to a computer for data analysis, stores up to 896 test values, and displays parameters like displacement and pressure.
The manual describes the instrument’s features, technical specifications, button functions, and step‑by‑step testing procedures. It also covers printing, synchronization, and troubleshooting for overload or freeze conditions, ensuring reliable operation in field and laboratory settings. This manual is written in Chinese.
Covers: Purpose · Features · Technical Specifications · Button Descriptions · Additional Function Descriptions · Testing Procedure

Top Instrument LDS-1H Computer Quick Moisture Meter User Manual
This manual explains how to operate the LDS-1H computer quick moisture meter, a handheld device for determining moisture content in tea leaves and various non‑metallic granular agricultural products such as rice, wheat, corn, soybeans and rapeseed. It covers safety checks, battery installation, and the main functions of the instrument.
The document is organized into sections on pre‑use checks, measurement preparation, moisture measurement steps, error correction, calibration procedures, restoring factory settings, status indicators, technical specifications, and routine maintenance. Each section provides step‑by‑step instructions and notes on interpreting the display. This manual is written in Chinese.
Covers: Pre‑use Notice · Measurement Preparation · Moisture Measurement · Error Correction · Calibration · Restore Factory Calibration Data
Latest Top Instrument manuals
TOP Instrument YYD-1 Stem Strength Tester User Manual
User Manual 7 pages · 258 KB · ZHThe TOP Instrument YYD-1 measures stem strength of crops, offering computer connection, data storage, and multiple testing functions.
Top Instrument LDS-1H Computer Quick Moisture Meter User Manual
User Manual 6 pages · 280 KB · ZHThe Top Instrument LDS-1H Computer Quick Moisture Meter User Manual provides setup, measurement, calibration, error correction, and maintenance instructions…
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in Top Instrument manuals
What is the maximum load the instrument can measure?
The maximum load is 500 N, with automatic unit conversion.
How long does the battery run continuously?
The battery provides continuous operation for 6 to 8 hours.
How can I restore the factory calibration settings?
Press and hold the “确定” key, then press the “▽” key, release both; the display will flash several times indicating that the default factory parameters have been restored.
From: Top Instrument LDS-1H Computer Quick Moisture Meter User Manual
What does the red indicator light on the display mean?
The red indicator in the upper‑left corner signals low battery voltage; replace the batteries promptly.
From: Top Instrument LDS-1H Computer Quick Moisture Meter User Manual
