The HK235F Voltage and Insulation Resistance Tester is configured for maintenance tasks where checking conductor voltage is only the first step. In addition to measuring up to 1000V DC and 750V AC, it provides insulation-testing outputs of 250V, 500V and 1000V.
Its insulation measurement capacity reaches 2000MΩ at the listed 250V and 500V ranges, while a 1mA load current supports insulation checks on cables, motors, windings and electrical equipment. Low-resistance ranges of 20Ω, 200Ω and 2000Ω allow the same instrument to investigate conductor and connection conditions.
The HK235F uses a 2000-count display and True RMS measurement. Data hold, a backlight, flashlight and automatic ranging support everyday inspection work, while its IP65 enclosure is designed for challenging field environments.
Key Features
- Combines voltage testing with insulation-resistance measurement.
- Selectable insulation test voltages of 250V, 500V and 1000V.
- Insulation resistance capacity up to 2000MΩ.
- 20Ω, 200Ω and 2000Ω low-resistance ranges.
- AC voltage measurement up to 750V.
- DC voltage measurement up to 1000V.
- True RMS technology for AC testing.
- Data hold for easier result recording.
- Backlit display and built-in work light.
- Automatic ranging and automatic power-off.
- IP65 enclosure with CAT IV 600V classification.
- Suitable for cable, motor and equipment insulation checks.
Technical Specifications
| Specification | HK235F |
|---|---|
| Instrument Type | Voltage and insulation resistance tester |
| Measurement Technology | True RMS |
| Display Count | 2000 counts |
| DC Voltage | Up to 1000V |
| AC Voltage | Up to 750V |
| Frequency Response | Up to 1000Hz |
| Continuity Buzzer | Supported |
| Low-Resistance Ranges | 20Ω / 200Ω / 2000Ω |
| Insulation Resistance at 250V | Up to 2000MΩ |
| Insulation Resistance at 500V | Up to 2000MΩ |
| Insulation Test Voltages | 250V / 500V / 1000V |
| Load Current | 1mA |
| Data Hold | Supported |
| LCD Backlight | Supported |
| Flashlight | Supported |
| Low-Battery Indication | Supported |
| Automatic Range Selection | Supported |
| Automatic Power-Off | Supported |
| Display Area | 24 × 17.4mm |
| Protection Degree | IP65 |
| Overvoltage Category | CAT III 1000V / CAT IV 600V |
| Certifications Listed | VDE, GS and CE |
| Battery | Listed as “AAA 3.7V × 2” in the source sheet |
| Dimensions | 250 × 83.5 × 45mm |
| Weight | Approximately 355g |
Application Scenarios
- Insulation testing of electrical cables
- Preventive maintenance for motors and windings
- Checking insulation after equipment repair
- Evaluating wiring before system energization
- Locating insulation deterioration in field equipment
- Low-resistance conductor and connection checks
- Maintenance of pumps, generators and industrial machinery
FAQ
What insulation test voltages are available?
The HK235F provides 250V, 500V and 1000V insulation test outputs.
Can the HK235F replace a regular multimeter?
It covers voltage, continuity and selected resistance tests, but it does not list the full range of current, capacitance and frequency functions normally found in a general-purpose multimeter.
Is insulation testing safe on energized equipment?
No. Insulation resistance tests should be performed only on isolated and de-energized circuits after following the required discharge and lockout procedures.
HK235 Series Selection Guide
The supplied document provides detailed specifications for HK235C, HK235E, HK235G and HK235F. It does not include verified specifications for HK235A or HK235B, so their capabilities should not be inferred from the model names alone.
| Model | Best Choice For | Key Differentiator |
|---|---|---|
| HK235C | General electrical installation work | LED/LCD voltage indication, continuity, phase sequence and RCD testing up to 1000V |
| HK235E | Higher-voltage DC applications | Extends DC voltage testing and LED indication to 1500V |
| HK235G | Multifunction troubleshooting | NCV, LoZ, resistance, capacitance, frequency, duty cycle and MAX/MIN |
| HK235F | Insulation maintenance | 250V, 500V and 1000V insulation tests up to 2000MΩ |
| HK235A | Specifications not supplied | Request the HK235A datasheet before comparison |
| HK235B | Specifications not supplied | Request the HK235B datasheet before comparison |
How to Choose
- Choose HK235C for routine voltage, continuity, polarity, phase-order and RCD checks.
- Choose HK235E when the system may reach 1500V DC.
- Choose HK235G when diagnostic versatility is more important than RCD testing or stepped high-voltage LED indication.
- Choose HK235F for insulation resistance testing on cables, motors and electrical equipment.
- Do not publish a feature comparison for HK235A or HK235B until their official parameter sheets are available.
