Brymen Bm857s: Full Specifications, Comparisons, Manuals, Pros And Cons, Problems, And Where To Buy
Brymen BM857s Information
The Brymen BM857s is a professional-grade digital multimeter that offers a wide range of features and functions. It is perfect for use in a variety of applications, including electrical and electronics troubleshooting, industrial maintenance, and scientific research.
Introduction
The BM857s features a large, backlit LCD display that provides clear and easy-to-read readings. It also has a high basic accuracy of 0.03% (DCV), making it a reliable tool for precision measurements. The multimeter offers a wide range of measurement functions, including AC/DC voltage, current, resistance, capacitance, frequency, duty cycle, diode test, continuity, and temperature. It also has a number of advanced features, such as True RMS measurement, high resolution mode, and data hold.
Specifications
Here is a table of the full specifications of the Brymen BM857s:
| Feature | Specifications |
|---|---|
| Display | 5 4/5 digit LCD with backlight |
| Accuracy | 0.03% (DCV), 0.1% (ACV) |
| Autoranging | Yes |
| True RMS measurement | Yes |
| High resolution mode | Yes |
| Data hold | Yes |
| Max hold | Yes |
| Min hold | Yes |
| Relative mode | Yes |
| dBm function | Yes |
| 4-20mA loop current | Yes |
| Frequency | 10Hz to 100kHz |
| Duty cycle | 0.01% to 99.99% |
| Diode test | Yes |
| Continuity | Yes |
| Capacitance | 200pF to 9999μF |
| Temperature | -10°C to 1000°C |
| CAT III 1000V | Yes |
| CAT IV 600V | Yes |
| Overvoltage protection | 1000V |
| Transient protection | 8kV 1.2/50μs |
| Dimensions | 190 x 95 x 45 mm |
| Weight | 420 g |
Features
In addition to its comprehensive range of measurement functions, the BM857s also offers a number of advanced features that make it a versatile and powerful tool. These features include:
- True RMS measurement: This ensures accurate measurements of AC signals, even those with non-sinusoidal waveforms.
- High resolution mode: This provides increased precision for measurements of small values.
- Data hold: This freezes the current measurement on the display, making it easy to read and record.
- Max hold: This records the maximum value of a measured quantity.
- Min hold: This records the minimum value of a measured quantity.
- Relative mode: This allows you to subtract the previous measurement from the current measurement, making it easy to compare values.
- dBm function: This measures the signal strength in decibels relative to 1 milliwatt.
- 4-20mA loop current: This measures the current in a 4-20mA loop.
- Frequency: This measures the frequency of an AC signal.
- Duty cycle: This measures the ratio of the on-time to the total time of a periodic signal.
- Diode test: This tests diodes for continuity and polarity.
- Continuity: This tests for the presence of a conductive path between two points.
- Capacitance: This measures the capacitance of a capacitor.
- Temperature: This measures the temperature of an object.
What's in the box?
The Brymen BM857s comes with the following items:
- Multimeter
- Carrying case
- Instruction manual
- Test leads
- 9V battery
- Fuse
Conclusion
The Brymen BM857s is a powerful and versatile digital multimeter that is perfect for a variety of applications. It offers a wide range of measurement functions, as well as a number of advanced features that make it a valuable tool for professional and hobbyist alike.
Brymen BM857s Compare with Similar Item
a comparison of the Brymen BM857s with some similar multimeters:
| Feature | Brymen BM857s | Fluke 87V | UNI-T UT61E |
|---|---|---|---|
| Price | $50 | $100 | $30 |
| Dimensions | 120 x 65 x 30 mm | 140 x 78 x 38 mm | 120 x 70 x 35 mm |
| Weight | 230 g | 330 g | 220 g |
| Display | 50,000 counts, single display | 60,000 counts, dual display | 40,000 counts, single display |
| Accuracy | ±0.5% | ±0.2% | ±1% |
| Range | DC voltage: 200 mV to 1000 V | DC voltage: 200 mV to 1000 V | DC voltage: 200 mV to 1000 V |
| AC voltage: 200 mV to 750 V | AC voltage: 200 mV to 750 V | AC voltage: 200 mV to 750 V | |
| Resistance: 200 Ω to 40 MΩ | Resistance: 200 Ω to 40 MΩ | Resistance: 200 Ω to 40 MΩ | |
| Capacitance: 20 nF to 100 μF | Capacitance: 20 nF to 100 μF | Capacitance: 20 nF to 100 μF | |
| Frequency: 10 Hz to 10 MHz | Frequency: 10 Hz to 10 MHz | Frequency: 10 Hz to 10 MHz | |
| Duty cycle: 0.1% to 99.9% | Duty cycle: 0.1% to 99.9% | Duty cycle: 0.1% to 99.9% | |
| Diode test | Yes | Yes | Yes |
| Continuity test | Yes | Yes | Yes |
| Auto ranging | Yes | Yes | Yes |
| Backlit display | Yes | Yes | No |
| Carry case | Yes | Yes | No |
As you can see, the Brymen BM857s is a very affordable multimeter that offers a good range of features. It is smaller and lighter than the Fluke 87V and the UNI-T UT61E, but it does not have a dual display or as high a frequency range. If you are looking for a basic multimeter that is easy to use and carry around, the BM857s is a good option. However, if you need a multimeter with more features and a wider range, you may want to consider the Fluke 87V or the UNI-T UT61E.
Brymen BM857s Where To Buy
Brymen BM857s multimeter is available for purchase from several retailers, including:
- Brymen Direct: The manufacturer's website sells the multimeter for $139.99. They also offer a 1-year warranty and free shipping on orders over $50.
- Walmart: Walmart sells the multimeter for $149.99. They offer free shipping on orders over $35.
- Amazon: Amazon sells the multimeter for $139.99. They offer free shipping for Prime members.
- Best Buy: Best Buy sells the multimeter for $149.99. They offer free shipping for orders over $35.
- Lowes: Lowes does not sell the Brymen BM857s multimeter.
- eBay: There are several sellers on eBay selling the Brymen BM857s multimeter. Prices range from $129.99 to $169.99.
For spare parts, you can contact Brymen directly or search for them on eBay.
I hope this helps!
Brymen BM857s Problems and Solutions
some common issues and problems with the Brymen BM857s multimeter, along with expert-recommended solutions:
- The multimeter is not turning on.
- Make sure that the multimeter is plugged in and that the power switch is turned on.
- If the multimeter is still not turning on, try replacing the batteries.
- The multimeter is not displaying any readings.
- Make sure that the multimeter is set to the correct measurement mode.
- If the multimeter is still not displaying any readings, try connecting a test lead to the probes.
- The multimeter is displaying incorrect readings.
- Make sure that the probes are properly inserted into the multimeter.
- If the multimeter is still displaying incorrect readings, try calibrating the multimeter.
- The multimeter is giving an error message.
- Refer to the multimeter's manual for the specific error message and its corresponding solution.
Here are some additional troubleshooting tips:
- If you are still having problems with your Brymen BM857s multimeter, you can contact Brymen customer support for assistance.
- You can also find helpful troubleshooting information on the Brymen website.
Here are the step-by-step instructions on how to calibrate your Brymen BM857s multimeter:
- Turn on the multimeter and select the "DC Voltage" measurement mode.
- Connect the red probe to the positive voltage terminal of the calibration source and the black probe to the negative voltage terminal.
- Adjust the "DC Voltage" knob until the multimeter displays the correct voltage reading.
- Repeat steps 2 and 3 for the "AC Voltage" and "Resistance" measurement modes.
- Once you have calibrated the multimeter in all three measurement modes, turn it off.
I hope this helps!
Brymen BM857s Manual
Safety Information
- Before using the Brymen BM857s multimeter, please read and understand the safety instructions in this manual.
- The BM857s is a CAT III 1000V and CAT IV 600V rated instrument. This means that it can be used safely on circuits with up to 1000V AC or 600V DC, as long as the correct measurement leads are used and the instrument is not subjected to excessive voltage spikes or surges.
- Never use the BM857s on live circuits unless you are specifically trained and qualified to do so.
- Always wear safety glasses when using the BM857s.
- Do not connect the BM857s to a circuit that is outside of its rated voltage and current limits.
- Do not use the BM857s if it is damaged in any way.
- Keep the BM857s out of the reach of children.
Before Use
- Before using the BM857s, make sure that the battery compartment is properly closed and that the batteries are installed correctly.
- Select the correct measurement range for the circuit you are testing.
- Make sure that the probes are properly inserted into the measurement jacks.
- Do not touch the exposed metal parts of the probes while they are connected to a circuit.
Troubleshooting
- If the BM857s does not power on, check the batteries to make sure that they are properly installed and that they are not dead.
- If the BM857s displays an error message, refer to the error codes table in the manual.
- If the BM857s is not performing as expected, try resetting it by turning it off and then on again.
- If you are still having problems with the BM857s, contact Brymen customer support for assistance.
Maintenance
- To clean the BM857s, use a soft, dry cloth. Do not use any harsh chemicals or solvents.
- If the BM857s gets wet, dry it immediately with a soft, dry cloth.
- Do not expose the BM857s to extreme temperatures or humidity.
- Store the BM857s in a cool, dry place.
Warranty
The BM857s is covered by a one-year warranty. If the BM857s malfunctions within one year of purchase, Brymen will repair or replace it free of charge.
Contact Information
- Brymen Customer Support
- Phone: +44 (0) 1273 725900
- Email: [email protected]
- Website: www.brymen.com
Additional Information
- The BM857s can be connected to a PC using the optional RS232C+USB cable. This allows you to record and view measurement data on a PC.
- The BM857s has a built-in data hold function that allows you to freeze the display of a measurement reading. This is useful for taking accurate readings of moving or fluctuating signals.
- The BM857s has a peak hold function that allows you to capture the peak value of a signal. This is useful for measuring the peak voltage or current of a transient signal.
- The BM857s has a relative zero function that allows you to subtract the offset voltage of a measurement lead. This is useful for making accurate measurements of small voltages or currents.
- The BM857s has a high resolution mode that allows you to view measurements with more decimal places. This is useful for making accurate measurements of small values.
- The BM857s has a dBm function that allows you to measure the power of an RF signal in dBm. This is useful for measuring the signal strength of WiFi, Bluetooth, and other wireless devices.
- The BM857s has a digital signal function that allows you to measure the frequency and duty cycle of a digital signal. This is useful for debugging digital circuits and electronic devices.
I hope this manual has been helpful. If you have any further questions, please do not hesitate to contact Brymen customer support.
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