BOSCH MMD 540H Hybrid Automotive Digital Multimeter
What makes this a ‘hybrid’ digital multimeter?
This meter has a CAT III (1000v) safety rating, the recommended safety rating for tools and accessories used on hybrid vehicle circuits. However, this meter is not an insulation tester.
Hybrid electric, plug-in hybrid and electric vehicles have high voltage components. Use this tool on these vehicles only if
- You are specially trained in high-voltage electrical system repair on hybrid electric, plug-in hybrid and electric vehicles.
- You have already read and are following the OEM manufacturer’s approved hybrid electric, plug-in hybrid and electric vehicle service. These procedures must be followed due to the high voltages in hybrid electric, plug-in hybrid and electric vehicles.
- You are using the CAT III / 1000V rated leads included with this kit.
- You are wearing proper protective gear, including Class 0 Type 1 electric service gloves that are free from defects/faults and that meet ASTM D120 standards and protect up to 1000 Volts AC / 1500 Volts DC.
The BOSCH MMD 540H Hybrid Digital Multimeter Features:
* CAT III (1000v) safety rating for hybrid vehicle circuits
* Peak, Min / Max readings as fast as 1 millisecond
* Higher amperage test ranges, up to 20 Amps
* Inductive RPM clamp for conventional and DIS ignition systems
* Fused diagnostic test leads for safe trouble shooting (up to 20 amps) at the circuit fuse location
* K-Type thermocouple for quick temperature measurement
* Large LCD display with bright backlighting and auto shutdown
* Rugged nylon case with handle for efficient storage
Included Accessories:
* Extra long test leads
* Inductive RPM clamp
* K-type thermocouple
* Fused diagnostic test leads for ATC and Mini
* 9 volt battery
* CD based, Tri-lingual users guide
* 1-year warranty
BOSCH MMD 540H General Specifications
The instrument complies with: IEC 1010-1 EN61010-1.
Insulation: Class2, Double insulation.
Overvoltage category: CATIII 1000V/CATIV 600V.
Display: 4000 counts LCD display with function indication. Polarity: Automatic, (-) negative polarity indication.
Overrange: “OL” mark indication.
Low battery indication: The “BAT” is displayed when the battery voltage drops below the operating level.
Measurement rate: 2 times per second, nominal.
Auto power off: Meter automatically shuts down after approx. 30 minutes of inactivity.
Operating environment: 0° C to 50° C (32° F to 122° F) at < 70 % relative humidity.
Storage temperature: -20° C to 60° C (-4° F to 140° F) at < 80 % relative humidity.
For inside use, max height: 2000m Pollution degree: 2
Power: One 9V battery , NEDA 1604, IEC 6F22.
Dimensions: 182 (H) x 82 (W) x55 (D) mm
Weight Approx.: 375g
BOSCH MMD 540H Electrical Specifications
| DC Voltage | |||
| Range | Resolution | Accuracy | |
| 400.0mV | 0.1mV | ±0.5% of rdg ±2 dgts | |
| 4.000V | 1mV | ±1.5% of rdg ±2 dgts | |
| 40.00V | 10mV | ||
| 400.0V | 100mV | ||
| 600V | 1V | ±1.8% of rdg ±2 dgts | |
| Input Impedance: 10MΩ | |||
| AC Voltage | |||
| Range | Resolution | Accuracy | |
| 4.000V | 1mV | ±1.0% of rdg ±3 dgts | |
| 40.00V | 10mV | ±1.5% of rdg ±3 dgts | |
| 400.0V | 100mV | ||
| 600V | 1V | ±2.0% of rdg ±4 dgts | |
| Input Impedance: 10MΩ. Frequency Range: 50 to 60Hz | |||
| RPM (Tachometer) | |||
| Range | Resolution | Accuracy | |
| RPM 4 | 600~4000 RPM | 1 RPM | |
| 1000~12000 RPM (X10 RPM) | 10 RPM | ||
| RPM 2/DIS | 300~4000 RPM | 1 RPM | ±2 % of rdg ±4 dgts |
| 1000~6000 RPM (X10 RPM) | 10 RPM | ||
| Effect Reading: >600 RPM | |||
| Dwell Angle | |||
| Cylinder | Range | Resolution | Accuracy |
| 4CYL | 0~90.0° | 0.1° | ±2.0% of rdg ±4 dgts |
| 5CYL | 0~72.0° | ||
| 6CYL | 0~60.0° | ||
| 8CYL | 0~45.0° | ||
| Resistance | |||
| Range | Resolution | Accuracy | |
| 400.0Ω | 0.1Ω | ±1.2% of rdg ±4 dgts | |
| 4.000kΩ | 1Ω | ±1.0% of rdg ±2 dgts | |
| 40.00kΩ | 10Ω | ±1.2% of rdg ±2 dgts | |
| Capacitance | |||
| Range | Resolution | Accuracy | |
| 4.000nF | 1pF | ±5.0% of rdg±50 dgts | |
| 40.00nF | 10pF | ±5.0% of rdg ±7 dgts | |
| 400.0nF | 0.1nF | ±3.0% of rdg ±5 dgts | |
| 4.000uF | 1nF | ||
| 40.00uF | 10nF | ||
| 400.0uF | 0.1uF | ||
| 4.000mF | 0.001mF | ±10% of rdg ±10 dgts | |
| 40.00mF | 10.00mF | ||
| Frequency | |||
| Range | Resolution | Sensitivity | Accuracy |
| 4.000kHz | 1Hz | >5V RMS | ±1.5% of rdg ±3 dgts |
| 40.00kHz | 10Hz | ||
| 400.0kHz | 100Hz | ||
| 40.00MHz | 1kHz | >10V RMS | ±2.0% of rdg ±4 dgts |
| Duty Cycle | |||
| Range | Resolution | Accuracy | |
| 0.1%~99.9% | 0.10% | ±2% of rdg ±2 dgts | |
| Pulse Width | |||
| Range | Resolution | Accuracy | |
| 1.0~ 20.0ms | 0.1ms | ±2% of rdg ±20 dgts | |
| Type-K Temperature | |||
| Range | Resolution | Accuracy | |
| -30° C~ 1000° C | 1° C | ±3% of rdg ±5° C/8° F (Meter only, probe accuracy not included) | |
| -22° F~1832° F | 1° F | ||
| Diode Test | |||
| Test current | Resolution | Accuracy | |
| 1.0mA typical | 1 mV | ±5% of rdg ±15 dgts | |
