The BK Precision manual provides detailed instructions for setting up and operating the 114B Analog Multimeter, including safety precautions to prevent electrical shock and guidelines for accurate measurements. It also offers troubleshooting tips, such as ensuring batteries are in good condition and adjusting the mechanical zero screw for precise readings.
Manual Overview
The BK Precision 114B Analog Multimeter manual provides detailed guidance on troubleshooting, error diagnostics, calibration, and board-level adjustments. For troubleshooting, the manual emphasizes safety precautions, such as ensuring equipment is powered off before testing and using isolation transformers for “hot chassis” equipment. Error diagnostics involve understanding the multimeter’s range and sensitivity specifications for DC volts, AC volts, and resistance measurements. Calibration and adjustments are achieved by ensuring the meter pointer is at zero when leads are removed and using the mechanical zero screw if necessary. The manual provides board-level guidance by detailing the use of the function/range selector and polarity switch to choose the correct measurement settings. It also highlights the importance of using the scale mirror to avoid parallax errors and recommends selecting the next lower range for more accurate readings. The manual stresses the importance of using the correct test leads and accessories to ensure accurate measurements and safe operation.
Quick Issues Covered
- Diagnose power-up failures with specific voltage range checks.
- Error codes for incorrect range settings on multimeter.
- Schematics aid in circuit tracing for component-level diagnostics.
Overview
BK Precision’s product is an analog multimeter designed for measuring various electrical parameters such as voltage, current, resistance, and transistor gain. The manual covers safety precautions, specifications, and operating instructions for the multimeter. It emphasizes the importance of safety when handling electrical equipment, particularly in high voltage environments. The manual also provides detailed specifications for different measurement ranges and accuracy, as well as general care and operating tips for the multimeter.
Specifications
- DC VOLTS
- Ranges: 0-300mV, 3V, 12V, 30V, 120V, 300V, 1200V
- Sensitivity: 20,000 ohms per volt
- Accuracy: + 3% of full scale
- AC VOLTS
- Ranges: 0-12V, 120V, 300V, 1200V
- Sensitivity: 9,000 ohms per volt
- Accuracy@50/60Hz: + 4% of full scale
- Frequency Response: (+1 dB) 72V range: 40 Hz to 100 kHz
- 120V range: 40 Hz to 10 kHz
- 300V range: 40 Hz to 5 kHz
- 1200V range: 40 Hz to 1 kHz
- DC CURRENT
- Ranges: 0-50µA, 3mA, 30mA, 300mA, 12A
- Accuracy: + 3% of full scale
- Burden Voltage: Less than 600 mV
- RESISTANCE
- Ranges: RX1, 0 to 2 kohms, mid scale 20 ohms
- RX10, 0 to 20 kohms, mid scale 200 ohms
- RX1k, 0 to 2 Mohms, midscale 20 kohms
- RX10k, 0 to 20 Mohms, midscale 200 kohms
- Accuracy: + 3% of full scale
- Maximum Open Circuit Voltage: RX1, 10, X1k ranges: 3V
- RX10k range: 9V
- Maximum Short Circuit Current: RX4 range: 150 mA
- RX10 range: 15 mA
- RX1k range: 150 µA
- RX10k range: 100 µA
- dB MEASUREMENT (dB scale)
- Ranges: -10 dB to +23 dB on 12V AC range
- +10 dB to 43 dB on 120V AC range
- +18 dB to 51 dB on 300V AC range
- +30 dB to +63 dB on 1200V AC range
- 0 dB Reference: 1 mW across 600 ohms
- BATTERY TEST (good – bad scale)
- Range: 1.5V range for battery test only
- Load: 7.5 ohms
- Battery Drain: 200mA
- TRANSISTOR LEAKAGE TEST (Iceo scale)
- Ranges: 0 to 150 µA on RX1k range
- 0 to 15 mA on RX10 range
- 0 to 150 mA on RX1 range
- Accuracy: + 5% of scale arc
- Maximum Applied Voltage: 3V, voltage measured on LV scale
- TRANSISTOR GAIN MEASUREMENT
- Range: 0 to 1,000 measured on hre scale with 10 range switch set to RX10
- Accuracy: + 3% of scale arc
- Test Leads: Special, supplied
- GENERAL SPECIFICATIONS
- Movement: Jeweled pivots, 50 µA full scale
- Scale Length: 3-1/2 inches, mirrored scale
- Polarity: + or -, polarity reversal switch
- Power Source: Batteries: Two 1.5V AA and one 9V
Controls & Indicators
The front-panel controls and indicators include a scale mirror to eliminate parallax errors, measurement scales for resistance, DC volts, DC amperes, AC volts, battery condition, transistor gain, transistor leakage, and decibels. There is a function/range selector, a rotary switch to select measurement range and function, and a DC+, DC- (polarity) switch.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
An electrical shock causing 10 mA of current to pass through the heart can stop most human heartbeats. Voltage as low as 35 volts DC or AC rms should be considered dangerous and hazardous since it can produce a lethal current under certain conditions. Higher currents are even more dangerous. Observe the following safety precautions:
– Never apply input voltages greater than those listed in the “SPECIFICATIONS” section. Personal injury or damage to the instrument may occur.
– This meter is not recommended for high voltage industrial use; for example, not for measurements of 440 V AC or 600 V AC industrial power mains. The unit is intended for use with low energy circuits to 750 V AC or 1000 V DC or high energy circuits to 250 V DC or AC. Accidental misuse by connection across a high voltage, high energy power source when the meter is set up for mA measurement may be very hazardous.
– Turn equipment off before making test connections in high voltage circuits.
– Discharge high voltage capacitors after removing power.
– When making voltage or current measurements in high voltage equipment, never touch equipment, meter, or test leads while power is applied.
– If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However, remember that high voltage may appear at unexpected points in defective equipment.
– Be careful to avoid touching a high voltage point. Remember that AC line voltage may be present in equipment under test (for example, at on-off switch, fuses, transformer, etc.), any time the equipment is connected to an AC outlet, even if it is turned off.
– When removing the cover for servicing or battery replacement, remove test leads and make sure that the input is disconnected from any high voltage.
– Use the time-proven “one hand in the pocket” technique while handling an instrument probe. Be particularly careful to avoid contacting a nearby metal object that could provide a good ground return path.
– Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface on which to place equipment; make certain such surfaces are not damp or wet.
– When testing AC powered equipment, remember that AC line voltage is usually present on some power input circuits such as on-off switches, fuses, power transformers, etc., any time the equipment is connected to an AC outlet. This is true even if the equipment is turned off.
– Some equipment with a two-wire AC power cord, including some with a polarized power plug, is the “hot chassis” type. This includes most recent television receivers and audio equipment. A plastic or wooden cabinet insulates the chassis to protect the customer. When the cabinet is removed for servicing, a serious shock hazard exists if the chassis is touched. To make measurements in “hot chassis” equipment, always connect an isolation transformer between the AC outlet and the equipment under test. The BK Precision Model TR-110 or 1604 Isolation Transformer, or Model 1653 or 1655 AC Power Supply is suitable for most applications. To be on the safe side, treat all two-wire AC powered equipment as “hot chassis” unless you are sure it has an isolated or earth ground chassis.
– On instruments or any equipment with a three-wire AC power plug, only use a 3-wire outlet. This is a safety feature to keep the housing or other exposed elements at earth ground.
– Never work alone. Someone should be nearby to render aid if necessary.
Download MANUAL Manual (PDF – 426.5 KB)
Bk-precision-114b-instruction manual: assists technicians in troubleshooting and calibrating the Bk-precision 114b model. File size: 426.5 KB.
- Brand: Bk-precision-114b-instruction
- Model: MANUAL
- Type: Manual
- File size: 426.5 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Bk-precision-114b-instruction MANUAL Overview
The Bk-precision-114b is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. This device allows users to measure voltage, current, resistance, and continuity with high precision, making it an essential tool for troubleshooting electrical circuits, testing components, and performing routine maintenance on electronic equipment.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD for clear readings in various lighting conditions
- Auto and Manual Ranging for flexible measurement options
- Data Hold Function to freeze readings for easier analysis
- Overload Protection to safeguard the device and user
- Battery Powered with low battery indicator
- Compact and lightweight design for portability
Basic Usage and Operation Tips
Before using the Bk-precision-114b, ensure the device is powered on and the test leads are properly connected. Select the appropriate measurement mode using the rotary switch. For voltage and current measurements, connect the test leads in parallel or series with the circuit respectively. Always start with the highest range to prevent damage, then adjust to a lower range for more precise readings. Use the data hold button to freeze the display when needed. After use, turn off the device to conserve battery life.
Troubleshooting and Maintenance
If the device displays erratic readings or no readings at all, check the test leads for damage or loose connections. Replace the batteries if the low battery indicator appears. Clean the device regularly with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. If the multimeter fails to function properly after these steps, consult the detailed manual for further diagnostics or contact customer support.
Safety Reminder
Always observe proper safety precautions when working with electrical equipment. Never exceed the maximum input limits specified in the manual. Avoid measuring live circuits with damaged test leads or if the device casing is compromised. Use caution to prevent electric shock or injury, and always disconnect power sources before performing maintenance on electrical systems.