1. Introduction
The SNAKOL SK-505B is a versatile 2-in-1 digital megohmmeter and multimeter designed for electrical professionals and enthusiasts. It combines the functions of an insulation resistance tester with a full-featured digital multimeter, offering high-precision measurements for various electrical parameters. This manual provides essential information for the safe and effective use of your device.
Figure 1: SNAKOL SK-505B Digital Multimeter and Megohmmeter
2. Safety Information
Please read and understand all safety information before operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always ensure the device is in good working condition before use.
- Do not use the device if it appears damaged or if the test leads are frayed.
- Observe all local and national safety codes.
- Avoid working alone.
- Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Always disconnect power to the circuit under test before making connections or changing functions.
- Keep fingers behind the finger guards on the test probes during measurements.
- Do not operate the device in explosive atmospheres or in the presence of flammable gases or dust.
- Ensure the battery compartment is securely closed before operation.
3. Product Overview
The SK-505B is equipped with a large backlit display, a rotary dial for function selection, and dedicated buttons for testing, data retention, and backlight control. It features a durable silicone protective case and a back bracket for convenient hands-free operation.
3.1 Key Features
- Insulation Resistance Measurement: Rated voltage up to 2500V, measuring range up to 50GΩ. Includes Polarization Index (PI) and Absorption Ratio (DAR) functions.
- Multimeter Functions: Measures AC/DC Voltage, Resistance, Capacitance, Diode, and features an On-Off Buzzer.
- Auto Ranging: Simplifies operation by automatically selecting the correct measurement range.
- Data Hold: Locks the displayed measurement value for easy reading.
- Backlit Display: Ensures readability in low-light conditions.
- Automatic Shutdown: Conserves battery life.
- Rechargeable Battery: Powered by 14500-3.7V*2 lithium batteries.
- Protective Case: Soft silicone case provides drop protection.
3.2 Component Identification
Figure 2: SK-505B Product Detailed Parameter Information
- Silicone Protective Case: Provides protection against drops and impacts.
- Backlit Display: Digital display for measurement readings.
- PI/DAR Insulation Resistance Polarization Index and Absorption Ratio Bonds: Indicators for advanced insulation tests.
- Insulation Resistance Test Area: Section of the rotary dial for insulation resistance functions.
- Rotary Dial: Used to select measurement functions.
- LINE Input: Connects to the line terminal of the insulation resistance object.
- EARTH Input: Connects to the ground terminal of the insulation resistance object.
- Measuring Time of Insulation Resistance and Selection of Multimeter Functions: Buttons for specific test parameters.
- Short press data lock Long press screen backlight: Button for Data Hold and Backlight control.
- Beeping Indicator: Provides audible alerts.
- Multimeter Function Area: Section of the rotary dial for standard multimeter functions.
- Multimeter Function Port: Input jack for multimeter measurements (e.g., VΩHz).
- Multimeter Common Port (COM): Common input jack for all measurements.
4. Specifications
The following tables detail the technical specifications of the SNAKOL SK-505B.
4.1 General Specifications
| Parameter | Value |
|---|---|
| Display Type | Digital Display |
| Operating Mode | Auto Range |
| Sampling Rate | 2 times/second |
| Battery | 14500-3.7V*2 Lithium Battery (Included) |
| Weight | Approx. 380g |
| Dimensions | 189*89*55mm |
| Automatic Shutdown | Yes |
| Data Retention | Yes |
| Backlight | Yes |
4.2 Measurement Ranges and Accuracy
| Functionality | Range | Accuracy | Power of Resolution |
|---|---|---|---|
| DC Voltage | 6V~1500V | ± (1%+5) | 1V |
| AC Voltage | 6V~1500V | ± (2%+5) | 1V |
| Resistance | 0.1Ω~60MΩ | ± (1%+5) | 0.1Ω~0.01MΩ |
| Capacitance | 0.001nF~100mF | ± (3%+5) | 0.001nF~0.01mF |
| Diode | ✓ | Auto Ranging | ✓ |
| On-Off Buzzer | ✓ |
4.3 Insulation Resistance Measurement Details
| Rated Voltage | Measurement Range | Measurement Accuracy |
|---|---|---|
| 50V | 0.05MΩ~1GΩ | ± (5%+5) |
| 100V | 0.1MΩ~2GΩ | ± (5%+5) |
| 250V | 0.25MΩ~5GΩ | 0.25MΩ~399.9MΩ: ± (3%+5) 0.4GΩ~2GΩ: ± (5%+5) |
| 500V | 0.5MΩ~10GΩ | 0.4GΩ~2GΩ: ± (5%+5) 2.001G~20GΩ: ± (10%+5) |
| 1000V | 1MΩ~20GΩ | 0.4GΩ~2GΩ: ± (5%+5) 2.001G~20GΩ: ± (10%+5) |
| 2500V | 5MΩ~50GΩ | ± (10%+5) |
| Rated Voltage | Display Range (Auto Range) | Power of Resolution |
|---|---|---|
| 50V | 4M/40M/400M/1GΩ | 0.001M~0.001GΩ |
| 100V | 4M/40M/400M/2GΩ | 0.001M~0.001GΩ |
| 250V | 4M/40M/400M/4G/5GΩ | 0.001M~0.01GΩ |
| 500V | 4M/40M/400M/4G/10GΩ | 0.001M~0.01GΩ |
| 1000V | 4M/40M/400M/4G/20GΩ | 0.001M~0.01GΩ |
| 2500V | 4M/40M/400M/4G/50GΩ | 0.01M~0.1GΩ |
| Rated Voltage | Open Circuit Voltage Tolerance Range | Drop Resistance Value | Short-Circuit Current | Note |
|---|---|---|---|---|
| 50V | 90%~110% of rated voltage | 0.05MΩ | ≥1mA | Beep alarm when less than 0.3MΩ |
| 100V | 90%~110% of rated voltage | 0.1MΩ | ≥1mA | Beep alarm when less than 0.6MΩ |
| 250V | 90%~110% of rated voltage | 0.25MΩ | ≥1mA | Beep alarm when less than 1MΩ |
| 500V | 90%~110% of rated voltage | 0.5MΩ | ≥1mA | Beep alarm when less than 2MΩ |
| 1000V | 90%~110% of rated voltage | 1MΩ | ≥1mA | Beep alarm when less than 4MΩ |
| 2500V | 90%~110% of rated voltage | 2.5MΩ | ≥1mA | Beep alarm when less than 10MΩ |
5. Setup
5.1 Package Contents
Before starting, please verify that all items are present in the package:
- SNAKOL SK-505B Multimeter
- Color Box
- Canvas Bag
- User Manual (this document)
- Certificate of Conformity
- Crocodile Clips * 3
- Charging Socket
- Red Meter Pen * 2
- Black Meter Pen * 1
Figure 3: Standard Equipment Included
5.2 Battery Installation and Charging
The SK-505B uses two 14500-3.7V lithium batteries. Ensure they are properly installed and charged before first use.
- Open the battery compartment cover on the back of the multimeter.
- Insert the two 14500-3.7V lithium batteries, observing correct polarity.
- Close the battery compartment cover securely.
- To charge the batteries, remove them from the multimeter and place them in the provided charging socket. Connect the charging socket to a suitable power source.
Figure 4: Lithium Battery Charging
6. Operating Instructions
6.1 Power On/Off and Backlight
To power on the device, rotate the dial from 'OFF' to any desired measurement function. The device will automatically power off after a period of inactivity to save battery. To manually turn off, rotate the dial to 'OFF'.
To control the backlight: A long press (2 seconds) of the 'HOLD' button will switch the backlight on or off.
6.2 Data Retention (HOLD Function)
During a measurement, a short press of the 'HOLD' button will lock the current data result on the display. Press the 'HOLD' button again briefly to resume normal measurement mode.
6.3 Insulation Resistance Measurement
1. Rotate the rotary dial to the 'Insulation Test V.Sel' section and select the desired test voltage (e.g., 50V, 100V, 250V, 500V, 1000V, 2500V).
2. Connect the red test lead to the 'LINE' input and the black test lead to the 'EARTH' input.
3. Connect the test leads to the object whose insulation resistance you wish to measure.
4. Press the 'TEST' button to initiate the measurement. The display will show the insulation resistance value.
5. Use the 'PI/DAR' and 'TIME' buttons to select Polarization Index, Absorption Ratio, or set measurement timing if required for advanced tests.
Figure 5: Insulation Resistance Measurement Setup
6.4 AC/DC Voltage Measurement
1. Rotate the rotary dial to the 'V~' (AC Voltage) or 'V=' (DC Voltage) position within the multimeter function area.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads to the circuit or component where you want to measure voltage.
Figure 6: AC/DC Voltage Measurement Setup
6.5 Resistance Measurement
1. Rotate the rotary dial to the 'Ω' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads across the component to measure its resistance. Ensure the component is de-energized before measurement.
Figure 7: Resistance Measurement Setup
6.6 Capacitance Measurement
1. Rotate the rotary dial to the '╂' (Capacitance) position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads across the capacitor. Note: Can be used with alligator clips for measurement.
Figure 8: Capacitance Measurement Setup
6.7 Diode Test and Continuity Buzzer
1. Rotate the rotary dial to the '╂' (Diode) or ')))' (Buzzer) position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. For diode test, connect the leads across the diode. For continuity, connect the leads across the circuit. The buzzer will sound if continuity is detected.
Figure 9: Diode Measurement Setup
7. Maintenance
7.1 Cleaning
Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Keep the test leads clean and dry.
7.2 Battery Care
- Always remove batteries if the device is not going to be used for an extended period.
- Charge batteries fully before storage and periodically during storage to maintain their lifespan.
- Dispose of old batteries according to local regulations.
7.3 Protective Case
The silicone protective case is designed to absorb shocks. Ensure it is properly fitted around the multimeter for maximum protection.
Figure 10: Soft Silicone Protective Case
8. Troubleshooting
- Device does not power on: Check battery installation and ensure batteries are charged.
- Inaccurate readings: Ensure test leads are properly connected and not damaged. Verify the correct function is selected on the rotary dial.
- Display is dim or unreadable: Activate the backlight by long-pressing the 'HOLD' button. If still dim, charge or replace batteries.
- No continuity beep: Ensure the device is in continuity mode and the circuit is de-energized.
- Insulation test alarm sounds prematurely: Refer to the 'Measurement Terminal Characteristics' table in the specifications section for alarm thresholds based on rated voltage.
9. User Tips
- Hands-Free Operation: Utilize the built-in back bracket for convenient hands-free use during measurements.
- Clear Readings: The large backlit screen and data retention feature are excellent for taking readings in challenging environments or when you need to record a value.
- Versatility: Remember that this device combines a megohmmeter and a multimeter. Familiarize yourself with both sets of functions to maximize its utility in various electrical tasks.
- Battery Management: Keep the spare set of 14500 batteries charged, especially for prolonged use or critical insulation tests.
10. Warranty and Support
SNAKOL products are manufactured to high-quality standards. For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official SNAKOL website.
