¶ Handheld Multimeters
This page will provide details and instructions on using handheld multimeters in the electronics lab.
¶ EEVBlog Brymen BM235 TrueRMS Autoranging Multimeter
¶ Features/Specs
- Display: 3-5/6 digits 6,000 counts
- Update Rate: 5 per second nominal
- Operating Temperature: -10oC to 45oC
- Relative Humidity: Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50% relative humidity at 45oC
- Altitude: Operating below 2000m
- Storage Temperature: -20oC ~ 60oC, < 80% R.H. (with battery removed)
- Temperature Coefficient: Nominal 0.15 x (specified accuracy)/ oC @ (-10oC ~ 18oC or 28oC ~ 45oC), or otherwise specified
- Sensing: True RMS sensing
- Safety: Certified per IEC/UL/EN61010-1 Ed. 3.0, IEC/UL/EN61010-2-030 Ed. 1.0, IEC/UL/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and the corresponding CAN/CSA-C22.2 regulations to Measurement Categories: CAT II 1000V, CAT III 600V and CAT IV 300V AC & DC
- Transient Protection: 6.0kV (1.2/50s surge)
- Overload Protection: A & mA: 0.4A/1000V DC/AC rms, IR 30kA, F fuse or better A: 11A/1000V DC/AC rms, IR 20kA, F fuse or better V & AutoV: 1100V DC/AC rms mV, Ohm & others: 1000V DC/AC rms
- Low Battery: Below approx. 2.5V
- Power Supply: 1.5V AAA Size battery X 2
- Power Consumption (typical): 3.2mA APO
- Consumption (typical): 10A APO
- Timing: Idle for 30 minutes
- Dimension: 161*80*50mm L*W*H (With Holster)
- Weight: Approx. 334 gm (With Holster) 18
- Special Features:
- AutoV (LoZ) ;
- AutoV automatically selects measurement function of DCV or ACV based, on their input levels via the test leads. The input also provides a low ramp-up impedance (LoZ) to drain ghost voltages*
- VFD;
- VFD-ACV and the associated Hz are equipped with digital low-pass filter (DSP), and are capable of handling VFD (Variable Frequency Drives) signals for fundamental V & Hz readings. It also improves ACV and Hz reading stability when being used in most noisy electrical environments
- BeepLit Continuity;
- BeepLit Continuity function is having improved convenience for checking wiring connections and operation of switches. A continuous beep tone together with flashing display backlight indicate a complete wire. Such audible and visible indications improve continuity readabilities in noisy working environments.
- Autoranging MAX/MIN/AVG Record;
- Backlighted LCD;
- Auto-ranging Relative Zero mode;
- Display Hold;
- EF-Detection (NCV);
- Non-Contact EF-Detection: An antenna is located along the top-left end of the meter, which detects electric field surrounding energized live conductors. It is ideal for tracing live wiring connections, locating wiring breakages and to distinguish between live and earth connections.
- Probe-Contact EF-Detection: For more precise indication of live wires, such as distinguishing between Live and Ground connections, use direct contact testing with one single test-probe via the input terminal COM or V. The COM terminal (Black) has the best sensitivity
- BeepJack™ on AmA/A terminals
- AutoV (LoZ) ;
- Accessories: Test lead pair; Batteries installed; User’s manual; BKP60 banana plug type-K thermocouple
¶ Measuring Temperature
The meter includes a K type thermocouple that can be used to monitor/measure temperature. It ranges from -20 to 250C (-4F to 482F). Make sure to plug the thermocouple into the correct jacks (COM and the one marked with a thermometer).
¶ Manual
¶ Safety:
DO:
- Return the meter and related leads/equipment to the electronics workbench
- Turn the meter to the off position when not in use.
DON'T:
- Use the ohm meter function on a live circuit
- Use the meter on circuits with over 1000V AC/DC
- Leave the meter in a wet environment/outside