ASTM-D-1422 Electronic Textile Digital Yarn Twist Tester
Determining optimum twist is critical for yarn physical characteristics. Yarns with low twist counts produce increased softness for knitting and warmth, while higher twist counts provide additional tensile strength. However, maximum tensile strength decreases if the twist angle exceeds the desired amount.
The SBT331A Electronic Digital Twist Tester meets international standards for measuring both untwist/retwist and direct rotational counting methods, offering advanced technology that is easy to use and cost-effective.
Designed to determine yarn twist in single or plied yarns using quadrant type with auto stop & reverse for conventional or untwist/retwist methods.
- ASTM D1422 - Standard Test Method for Twist in Single Spun Yarns by the Untwist-Retwist Method
- ASTM D1423 - Standard Test Method for Twist in Yarns by Direct-Counting
- ISO 2061 - Textiles - Determination of twist in yarns - Direct counting method
- BS 2085 - Method of test for determination of twist in yarns, direct counting method
- DIN 53832 - Testing of textiles - Determination of the twist of single and plied yarns
- Select the appropriate method/mode
- Clamp yarn between two clamps
- Select 'S' or 'Z' key based on twist direction
- Set stopper at approximately 50% of expected elongation
- Press 'START' key to initiate motor
- Motor untwists yarn while LCD display counts twists
- Latest microprocessor-based equipment for twist per inch/cm measurement
- Specialized for single yarn, double yarn & open-end yarns
- Special sensor for zero setting
- Tensioning device for proper yarn tension during testing
- Fully programmable unit
- User-friendly control panel with operator guidance
- Smooth precision-engineered auto mechanism
- 1 to 50gms weights for proper tension application
- Digital control panel with 16-character, 4-line LCD display
| Parameter | Specification |
|---|---|
| Test Methods | Single untwist-retwist, Double untwist-retwist, Direct counting, Multiple untwist-retwist |
| Measuring Twist Range | 1~9999.9 twist |
| Clamp Distance | 1-50 cm (0.5-20 inch) |
| Yarn Test Length | 25, 50, 100, 200, 250, 500 mm |
| Untwist Elongation Range | Maximum 20mm |
| Rotating Speed of Gripper | 1500 r/min, 800 r/min, slow inching speed |
| Elongation Indicator | 0-60 mm |
| Pre-tension | 0 - 160 cN |
| Display | Back-light LCD |
| Output | RS232 serial port for data output and printer output |
| Dimensions | 1080 x 275 x 216 mm |
| Power Supply | 220V, 50Hz or 110V, 60Hz |
| Weight | 30 Kg |
- Main Unit: 01 No.
- Tension Weight Kit (0.5cN, 1cN, 5cN, 10cN, each): 01 No.
- Tension Weight Kit (2cN, 20cN, 50cN, each): 02 Nos.
- Tension Weight Balancing Pan unit: 01 Set
- Weight Box for keeping tension weight: 01 No.
- 500mm fixed caliper: 01 No.
- Pointing Needle: 01 No.
- Power Cord: 01 No.
- User's Manual: 01 No.
- Inspection & Conformance Certificate: 01 No.
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