Hioki ST5520 Digital Insulation Testers

Description

The Hioki ST5520 is a high-speed digital insulation tester engineered for automated production lines and quality assurance testing of electronic components, battery packs, and electric vehicle systems. Featuring the fastest testing speed in its class, this instrument optimizes cycle times while ensuring measurement integrity through advanced contact check and short-circuit detection mechanisms.

Technical Specifications:
Manufacturer: Hioki E.E. Corporation
Model Number: ST5520
Measurement Voltage Range: 25 V to 1000 V DC
Voltage Setting Resolution: 1 V steps
Resistance Measurement Range: 0.002 MΩ to 9990 MΩ
Basic Accuracy: ±2% rdg. ±5 dgt.
Sampling Rate: Maximum 50 ms (Fast mode)
Contact Check Function: Prevents false PASS judgments due to probe disconnection
Short-Circuit Detection: 2-wire measurement system prevention
External Interface: External I/O, Analog Output, RS-232C
Power Supply: 100 V to 240 V AC, 50/60 Hz, 25 VA max
Dimensions: 215 mm W × 80 mm H × 166 mm D
Weight: 1.1 kg
Operating Temperature: 0 °C to 40 °C, 80% RH or less
Storage Temperature: -10 °C to 50 °C, 80% RH or less
Certifications: CE Mark, RoHS Compliant

Industrial Application:
In automated electric vehicle (EV) battery module assembly, ensuring insulation integrity between cells and the outer casing is critical. The Hioki ST5520 solves the bottleneck of slow insulation testing by delivering a 50 ms test cycle. Its integrated contact check function prevents defective modules with poor probe contact from being erroneously marked as PASS, eliminating field failures and maintaining high-throughput quality control.

Commercial Integration:
Original Engineering: This unit features Hioki’s proprietary high-speed discharge and measurement circuitry, ensuring authentic performance and long-term reliability.
Technical Compatibility: Seamlessly integrates with PLC-controlled automated testing lines via standard external I/O and RS-232C interfaces.
Lead Time: Standard stock availability ensures rapid dispatch to minimize production downtime.

Key Attributes
Accuracy Class: ±2%
Insulation Resistance: 20 MΩ
Measuring Range: 9.99 G Ohms
Testing Voltage: 25V TO 1000 V
Place of Origin: Japan
Model Number: ST5520
Brand Name: Hioki
Current Resolution: 1 mA
Dimensions: 46 * 28 * 21cm
Display Type: Digital Only
Operating Temperature: 0°C to 40°C
Speed Range: 30 ms/time
Time Resolution: 30ms
Measurement Range: 25 to 1,000 V
Accuracy: ±2% of reading ±5 digits
Display: LCD with 4-level backlight
Interface: RS-232C, external I/O
CE Compliant: Yes

Packaging and Delivery
Selling Units: Single item
Single package size: 40X39X17 cm
Single gross weight: 2.600 kg