Sefram BK390B Digital Multimeter User Manual

Sefram BK390B Digital Multimeter

Specifications

• Model: BK390B
• Safety: Double insulation, CAT III
• Power Source: Battery
• Bluetooth Connectivity

Product Usage Instructions

Safety Guidelines

Before use, please read the safety instructions provided in the manual carefully.

Functionality

The BK390B multimeter offers various functions for measuring AC/DC voltages and currents, dB measurements, Peak-Hold mode, diode testing, Auto-Hold function, Data Logger, and more.

Measurement Steps

1. To measure AC/DC voltages:
   • Select the desired function using the yellow function button.
   • Choose the range using the RANGE button.
   • For Peak-Hold mode in AC or DC measurements, press A-HOLD.
   • To record maximum/minimum values, use the appropriate buttons and cancel with CANCEL.
2. To measure currents:
   • Use the yellow function button to select the current measurement.
   • Choose the range accordingly.
3. To perform diode testing, follow the instructions provided in the manual to avoid damaging the device.

Maintenance

• Regularly clean the multimeter to ensure accurate readings.
• Replace batteries and fuses as needed following the guidelines provided in the manual.

Additional Features

The BK390B offers features like Relative mode, a Data Logger for recording measurements, IR Communications via Bluetooth, and a Buzzer setup for customization.

FAQ:

Q: What should I do if I encounter error messages like ProbE or FUSE?

• A: For FUSE errors, replace the fuse as instructed in the manual.
• For other errors like ProbE, contact customer support for assistance.

Q: How do I use the Auto-Hold function?

• A: Press A-HOLD during measurements to freeze and display the current value.
• Press again to resume recording or cancel with CANCEL.

Q: How can I measure AC+DC values?

• A: Select the appropriate function and range for AC+DC measurements using the provided buttons on the multimeter.

Safety Information

Understand and follow operating instructions carefully. Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired.

WARNING

• This identifies hazardous conditions and actions that could cause BODILY HARM or DEATH. To avoid possible danger, follow the below guidelines.
• Use the meter only as specified in this manual or the protection by the meter might be impaired.
• Never operate the meter with the cover removed or the case open.
• To avoid false readings that can lead to electric shock and injury, replace the battery as soon as low battery indicator.
• Use caution with voltages above 30VAC rms, 42VAC peak, or ±30VDC. These voltages pose a shock hazard.
• When using test leads or probes, keep your fingers behind the finger guards.
• Remove the test lead from the meter before opening the battery door or meter case.
• Always use proper terminals, switch positions, and range for measurements.
• Do not apply more than the rated voltage, as marked on the meter, between terminals or between any terminal and earth ground.
• Do not use the High-Frequency Rejection (Low Pass Filter) option to verify the presence of hazardous voltages.
• Voltages greater than what is indicated may be present.
• First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then select the filter function.
• To avoid possible electric shock or personal injury, never attempt an in-circuit current measurement where the open circuit potential to earth is greater than 1000V.
• Replace the fuse as soon as the indicator (FUSE) appears.
• Only replace the blown fuse with the proper rating as specified in this manual.
• Do not use the meter around explosive gas, vapor, or dust.
• To reduce the risk of fire or electric shock do not expose this product to rain or moisture.
• Do not attempt a current measurement when the open voltage is above the fuse protection rating.
• Suspected open voltage can be checked with the voltage function.
• Never attempt a voltage measurement with the test lead inserted into the A input terminal.

CAUTION

• This identifies conditions and actions that could DAMAGE the meter or equipment under test. To avoid possible damage, follow the below guidelines.
• Disconnect the test leads from the test points before changing the position of the function rotary switch.
• Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance.
• Always use proper terminals, switch positions, and range for measurements.
• Do not use the LoZ mode to measure voltages in circuits that could be damaged by this mode’s low impedance.
• Replace the fuse as soon as the indicator (FUSE) appears.
• Never connect a source of voltage with the function rotary switch in resistance, diode, continuity, and capacitance position.
• Never set the meter in current function to measure the voltage of a power supply circuit in equipment that could result in damage to the meter and the equipment under test.

Electrical Symbols

The Meter Description

Front panel illustration:

1. Auto backlight sense point
2. 40,000 count dual display
3. Push buttons
4. Rotary switch
5. Input terminal for voltage, frequency, resistance, continuity, diode, capacitance, and temperature measurements.
6. Return terminal for all measurements.
7. Input terminal for 0 to 400mA current measurements.
8. Input terminal for 0 to 10A current measurements.

Push Buttons

Function (Yellow)| Select measurement function.
RANGE| Select measurement range. Press > 1 sec to enter auto range mode.
HFR| Enable/Disable the High Frequency Reject mode in the AC measurements.
Bluetooth| Enable/Disable the Bluetooth mode.
A-HOLD| Enable/Disable the Auto-Hold mode.
P-HOLD| Enable the Peak-Hold mode in the AC or DC measurements. In this mode, press the button to select Peak-Hold MAX or MIN. Press > 1 sec to disable the Peak-Hold mode.
ENTER| Enter the menu function in the pointer position.
CANCEL| Cancel the current menu function.
°C / °F| Select degrees Celsius or degrees Fahrenheit.

Power On Options

When turning the power on, press the function button to execute the below options.

Power On Options

ENTER| Display the firmware version.
A HOLD| Display all LCD segments.

Making Basic Measurements

WARNING

• When connecting the test leads to the DUT (Device Under Test), connect the common test lead before connecting the live lead.
• When removing the test leads, remove the test live lead before removing the common test lead.
• The following sections describe how to take measurements with the meter.

Measuring AC and DC Voltage

• This meter have true rms readings, which are accurate for distorted sine waves and other waveforms (with no DC offset) such as square waves, triangle waves, and staircase waves.
• The ranges of measuring voltage are 40mV, 400mV, 4V, 40V, 400V and 1000V. To select the mV range, turn the rotary switch to the mV position.
• For best accuracy when measuring the DCmV, touch the probe tips together and read the DC offset. If necessary, you can use the relative (Δ) mode to automatically subtract this value.

Make dB measurement

• The meter is capable of displaying voltage as a dB value, either relative to 1 milliwatt (dBm), or a reference voltage of 1 volt (dB).
• A dBm measurement must use a reference impedance (600Ω) to calculate a dB value based on 1 milliwatt. A dB measurement uses a 1-volt reference voltage to compare the present measurement against. Define as below:
• To use the dB or dBm function, turn the rotary switch to ACV or ACmV position.
• Then move the blinking cursor of the menu to the dB or dBm position, and press the ENTER button to enter the function.
• Press the CANCEL button to exit the function.

Measuring Voltage in LoZ Mode

• Do not use the LoZ mode to measure voltages in circuits that could be damaged by this mode’s low impedance.
• To eliminate ghost voltages, the meter’s LoZ mode presents a low impedance across the leads to obtain a more accurate measurement. The ranges of measuring LoZ voltage are 400V and 1000V.
• In this mode, the meter will automatically measure the input signal which is AC or DC, and determine the range.
• To use the LoZ mode, turn the rotary switch to the LoZ position.

Measuring AC and DC Current

WARNING

• Always use proper terminals, switch positions, and range for measurements.
• To avoid possible electric shock or personal injury, never attempt an in-circuit current measurement where the open circuit potential to earth is greater than 1000V.
• Only replace the blown fuse with the proper rating as specified in this manual.
• Replace the fuse as soon as the indicator (FUSE) appears.
• To measure current, you must break the circuit under test, then place the meter in series with the circuit.
• The ranges of measuring current are 40mA, 400mA, 4A and 10A. AC is displayed as an rms value. Insert the black lead into the COM terminal.
• For currents less than 400 mA, insert the red lead into the mA terminal. For currents above 400 mA, insert the red lead into the A terminal.
• You can press the function (yellow) button to select the current measurement function.

Measuring Frequency

• The meter measures the frequency of a voltage or current signal by counting the number of times the signal crosses a threshold level each second.
• This function only can be operated in AC voltage and current measurements. The ranges of measuring frequency are 400Hz, 4kHz, 40kHz and 100kHz.
• If a reading shows as 0 Hz or is unstable, the input signal may be below or near the trigger level. The detail of the frequency trigger level refers to the electrical specifications.
• To use the frequency function, press the function (yellow) button to select the measurement function.

Make High-Frequency Rejection Measurement

• Do not use the High-Frequency Rejection (Low Pass Filter) option to verify the presence of hazardous voltages.
• Voltages greater than what is indicated may be present. First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then select the filter function.
• The High-Frequency Rejection mode equips a low pass filter in the AC measurements. The cut-off frequency (-3dB point) of the low pass filter is 800Hz.
• To use the HFR mode, press the HFR button to equip a low pass filter in the AC measurements.

Make Peak-Hold Measurement

• The Peak-Hold mode records wave peak maximum and minimum input values. The response time of Peak-Hold is 10us.
• To use the Peak-Hold mode, press the P-HOLD button to enable the Peak-Hold mode in the AC or DC measurements. In this mode, press the P-HOLD button to select the peak MAX or MIN value. Press > 1 sec to disable the Peak-Hold mode.
• For square waves, use the peak-hold mode in the DC measurements.

Make AC+DC Measurement

• When the input signal is AC and DC combinations: AC over DC or DC over AC, the meter is capable of displaying one AC+DC (rms) value combined.

Define as below:

• To use the AC+DC function, turn the rotary switch stop in DCV, DCmV, or A position, then press the function (yellow) button to select the measurement function.

Measuring Resistance

• To avoid possible damage to the meter or to the equipment under test, disconnect the circuit power and discharge all high-voltage capacitors before measuring resistance.
• The ranges of measuring resistance are 400Ω, 4kΩ, 40kΩ, 400kΩ, 4MΩ, and 40MΩ.
• The test leads may be added 0.1Ω to 0.2Ω of the error to resistance measurements. To test the leads, touch the probe tips together and read the resistance of the leads.
• For best accuracy, you can use the relative (Δ) mode to automatically subtract this value.
• High-resistance (>10MΩ) readings are susceptible to electrical noise. To smooth out most noisy readings, enter the MAX/MIN recording mode; then step to the average (AVG) reading.

Continuity Check

CAUTION

To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high voltage capacitors before testing continuity.

• The continuity check features a buzzer that sounds as long as a circuit is complete. The buzzer allows you to do quick continuity checks without watching the display.
• When measuring resistance is less than the threshold, the buzzer sounds. You can set up the threshold in setup mode.
• The continuity threshold is default 30Ω.
• To use continuity check, turn the rotary switch to the resistance position, then press the function (yellow) button to select measuring mode.

Testing Diodes

To avoid possible damage to the meter or to the equipment under test, disconnect the circuit power and discharge all high-voltage capacitors before testing diodes.

• Use the diode test to check diodes, transistors, silicon-controlled rectifiers (SCRs), and other semiconductor devices.
• This function tests a semiconductor junction by sending a current through the junction and then measuring the junction’s voltage drop. A good silicon junction drops between 0.5V and 0.8V.
• For forward-bias readings on any semiconductor component, place the red test lead on the component’s positive terminal and place the black lead on the component’s negative terminal.
• In a circuit, a good diode should still produce a forward-bias reading of 0.5V to 0.8V.
• For reverse-bias readings on any semiconductor component, the meter still can be measured. In a circuit, a good diode should still produce a reverse bias reading of -0.5V to -0.8V.
• The display shows “OL” if the diode is open or short.
• To use the diode test, turn the rotary switch to the resistance position, then press the function (yellow) button to select the measuring mode.

Measuring Capacitance

• To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high- voltage capacitors before measuring capacitance.
• Use the dc voltage function to confirm that the capacitor is discharged.
• The ranges of measuring capacitance are 40nF, 400nF, 4uF, 40uF, 400uF, 4mF and 40mF.
• To improve the accuracy of measurements less than 1000nF, you can use the relative (Δ) mode to subtract the residual capacitance of the leads.
• To use capacitance measurement, turn the rotary switch to the resistance position, then press the function (yellow) button to select the measuring mode.

Measuring Temperature

• The meter measures the temperature of a K-type thermocouple. You can press the function (yellow) button to choose degrees Celsius (°C) or degrees Fahrenheit (°F).
• Display ranges are -200°C to +1200°C and -328°F to +2192°F. Readings outside of these ranges show “OL” on the display. When there is no thermocouple connected, the display also shows “OL”.
• To use temperature measurement, turn the rotary switch to the temperature position, then press the function (yellow) button to select the measuring mode.

Auto-Hold

• When measuring, you can press the A-HOLD button to start the Auto-Hold mode. In this mode, the meter holds the reading and shows it on the secondary display.
• If the difference between the new reading and the hold reading is bigger than 5d (3¾-digit mode), and the new reading is also stable, then the meter automatically holds a new reading on the secondary display.
• When the reading is smaller than the Auto-Hold limit, or the reading is OL, the Auto-Hold mode is not working.

• To exit Auto-Hold mode, press the A-HOLD button again. If you don’t want to use the Auto-Hold mode, you can disable it in the setup mode.
• When Auto-Hold mode is disabled, the hold mode does not update any new reading.

Maximum / Minimum Record

• When measuring, you can record the maximum, minimum, and average values of reading.
• To use maximum/minimum record mode, move the blink cursor of the menu to MAX, MIN or AVG position, and press the ENTER button to enter mode. In this mode, the meter records each data to compare the maximum and minimum values. Also, the meter calculates the average reading.
• You can move the blink cursor of the menu to MAX, MIN, or AVG position, and press the ENTER button to select the result on the secondary display.
• When maximum/minimum record mode running, if you want to pause recording, press the A-HOLD button. Press again to continue.
• To exit maximum/minimum record mode, press the CANCEL button.

Relative

• When measuring, you can use the relative (Δ) mode to subtract the offset.
• To use relative (Δ) mode, move the blink cursor of the menu to Δ position, and press the ENTER button to enter mode. In this mode, the meter records the presently reading as a reference and shows it on the secondary display.
• The relative (Δ) mode subtracts reference from each reading and shows the result on the main display.
• In relative (Δ) mode, the minimum range is the relative (Δ) range.
• For example: The ranges of measuring resistance are 400Ω, 4kΩ, 40kΩ, 400kΩ, 4MΩ, and 40MΩ. If you use the relative (Δ) the mode in the 4kΩ range, then the minimum range is the 4kΩ range.
• You can use a range is 4kΩ to 40MΩ, but cannot change to 400Ω.
• To exit relative (Δ) mode, press the CANCEL button.

Relative %

• When measuring, you can use the relative (%) mode to calculate the relative percent value. The relative percent value is defined as below: Relative % = [(Reading – Ref) ÷ Ref] × 100.0%+
• To use relative (%) mode, move the blink cursor of the menu to the % position, and press the ENTER button to enter mode.
• In this mode, the meter records the presently reading as a reference and shows it on the secondary display. The relative (%) mode calculates the relative percent value from each reading and shows the result on the main display.
• To exit relative (%) mode, press the CANCEL button.

Memory Save / Load

• When measuring, you can save the reading to memory and load it from memory. The meter can store a maximum of 1000 data in memory. The recorded data amount is shown on the secondary display.
• To use memory save / load mode, move the blink cursor of the menu to the MEM position, and press the ENTER button to enter mode.

In this mode, you can operate the below options:

Memory Options

A-SAVE| You can operate the Auto-Save mode to automatically save new readings. When you use the probes to measure a new reading, the meter will automatically save it. In some cases, the Auto-Save mode will not work. For example, the reading is smaller than the limit (refer to Auto-Hold), or the reading is OL. Press the ENTER button to start Auto-Save mode, and press the CANCEL button to exit.
SAVE| Press the ENTER button to save a new reading to memory.
LOAD| You can press the ENTER button to review data from memory. Press the UP or DOWN button to select data. Press the CANCEL button to return.
CLR| Press the ENTER button to clear all data from memory.
MAX| Press the ENTER button to review the maximum data from memory.
MIN| Press the ENTER button to review the minimum data from memory.

To exit memory save / load mode, press the CANCEL button.

Data Logger

• You can record a lot of reading to memory in a long time, then analyze and plot a graph. The meter can store a maximum of 40,000 data in memory.
• The recorded data amount is shown on the secondary display.
• The record rate can be set from 1 sec and 600 sec. The error of the timer is less than 3 seconds per hour.
• To use the data logger, move the blinking cursor of the menu to the LOG position, and press the ENTER button to enter mode.

In this mode, you can operate the below options:

Data Logger Options

SAVE| Press the ENTER button to start the data logger. The logger automatically records at regular intervals. You can press ENTER button to pause the data logger and press again to continue. To stop the data logger, press the CANCEL button to return.
LOAD| You can press the ENTER button to review data from memory. Press the UP or DOWN button to select data. Press the CANCEL button to return.
CLR| Press the ENTER button to clear all data from memory.
RATE| You can set up the record rate of the logger. Press the UP or DOWN button to select the rate. Press the CANCEL button to return.
MAX| Press the ENTER button to review the maximum data from memory.
MIN| Press the ENTER button to review the minimum data from memory.

To exit the data logger, press the CANCEL button.

Auto Power Off

• If you don’t operate the rotary switch or buttons for a specified time, the meter will turn off automatically to save the power of the batteries. The default APO timer is 10 minutes. In setup mode, you can change the APO timer.

Backlight

• The backlight is automatically turned on in a dark environment. The backlight mode is default auto. In setup mode, you can set the backlight mode.

Buzzer

• The meter equips a 2kHz tone buzzer. Valid button press: Beep once. And invalid button press: Beep twice. In setup mode, you can turn on or off the buzzer. But the buzzer in the continuity check cannot be turned off.

Display Resolution

• This meter has two display resolutions: normal resolution (3¾-digit mode) and high resolution (4¾-digit mode).
• The normal resolution is set to default. You can set up the resolution in setup mode.

Setup

• To use meter setup mode, move the blink cursor of the menu to the SETUP position, and press the ENTER button to enter the function.
• Press the UP or DOWN button to select the item; press the LEFT or RIGHT to select options.
• When you complete the setup, press the  CANCEL button to exit setup mode.

Setup Options

APO| APO timer: 1min to 30min, or OFF
b.Lit| Backlight mode: Auto, ON or OFF
bEEP| Buzzer ON or OFF
A.Hold| Auto-Hold mode ON or OFF
Continue| Continuity threshold: 10Ω to 50Ω
diGit| Display digit: Lo or Hi
TEMP| Temperature default unit: °C or °F
RESET| Press ENTER to reset all setup options.

IR Communications

• You can use the IR (infrared) communication link and WinDMM software to transfer the real-time data of the meter to the PC.
• In addition, the meter allows the user to log into internal memory and connect to the computer later for download.
• For detailed information, refer to the WinDMM Installation Guide or the online help.

Bluetooth

• The meter uses low-power Bluetooth v4.0 wireless technology to transfer real-time data. You can use the RF communication to link to Android or iOS devices.
• The RF communication range: Open air up to 10 m

Maintenance

• Verify the meter’s operation by measuring a known voltage. If in doubt, have the meter serviced. Do not attempt to repair this meter. It contains no user-serviceable parts.
• Repair or servicing should only be performed by qualified personnel. To maintain the best accuracy, calibrate the meter once a year.

Cleaning

• Periodically wipe the case with a dry cloth and detergent. Do not use abrasives or solvents.

Replace Batteries & Fuse

• Remove the test lead from the meter before opening the battery door or meter case.
• Replace the fuse as soon as the indicator (FUSE) appears.
• Only replace the blown fuse with the proper rating as specified in this manual.
• Battery Type : 4 x 1.5V IEC LR6 or size AA
• Fuse1 Type : 440mA, 1000V IR 10kA
• Fuse Fuse2 Type : 11A, 1000V IR 20kA Fuse
• When the battery low indication shows on the display, replace the batteries soon.
• To save the power of batteries, you can disable the backlight and buzzer in setup mode.

General Specifications

• MAX Voltage between any Terminal and Earth Ground: 1000Vrms
• Fuse Protection for mA inputs: 440mA, 1000V IR 10kA Fuse
• Fuse Protection for A inputs: 11A, 1000V IR 20kA Fuse Display: 4,000/40,000 counts, over range to 110%.
• Over Range Indication: OL
• Measuring Rate: 10 samples per second
• Power Requirements : 4 x 1.5V IEC LR6 or size AA
• Battery Life: 50 hours typical with alkaline (with backlight off).
• Operating Ambient : -10°C to 30°C (< 85% RH),
  • 30°C to 40°C (< 75% RH),
  • 40°C to 50°C (< 45% RH)
• Storage Temperature:
  • -20°C to 60°C, 0% RH to 80% RH (batteries not fitted)
• Temperature Coefficient:
  • 0.1 x (Specified Accuracy) / °C, < 18°C or > 28°C
• Operating Altitude: 6561.7ft (2000m)
• Calibration Cycle: 1 time per year.
• Weight: 465g including battery.
• Dimensions (H x W x L): 52 x 83 x 188 (mm) with holster.
• RF Communications: 2.4 GHz ISM Band, open-air 10m
• Safety: Complies with EN 61010-1 CAT IV 600V, CAT III 1000V

• EMC: EN 61326-1
• Pollution Degree: 2
• Shock Vibration: Per MIL-PRF-28800F for a Class 2 instrument
• Drop Protection: 5ft (1.5m)
• Indoor Use

Electrical Specifications

• Accuracy is ± (% of reading + number of digits) at 18°C to 28°C (< 80% RH)
• For specifications in the 4¾-digit mode, multiply the number of digits by 10.
• For the best measurements, with relative (Δ) mode to compensate for offsets.

Voltage

400.0mV [1]

4.000V

40.00V

400.0V [1]

1000V [2]

| Sine Wave: 0.5%+2d for 40Hz to 70Hz [3] 1.5%+4d for 70Hz to 1kHz [3] 3.0%+4d for 1kHz to 5kHz [3] 5.0%+20d for 5kHz to 100kHz [4][5]
DC| 40.00mV| 0.03%+3d
400.0mV

4.000V

40.00V

400.0V

1000V

| 0.03%+1d
AutoV LoZ| 400.0V

1000V

| 2.0%+4d for ACV 40Hz to 1kHz 2.0%+4d for DCV
[1]  The bandwidth is 40Hz to 5kHz [2]  The bandwidth is 40Hz to 1kHz [3] Below 10% of the range, add 2d to accuracy. [4]  Below 10% of the range, add 10d to accuracy. < 50kHz. [5]  Below 10% of the range, add 20d to accuracy. > 50kHz.

• Input Impedance : 10MΩ, < 100pF
• LoZ Input Impedance: 3kΩ
• Bandwidth : 40Hz to 100kHz
• Minimum Resolution : 10uV
• CMRR / NMRR (Common / Normal Mode Rejection Ratio): VAC: CMRR > 60dB at DC, 50Hz / 60Hz
• VDC : CMRR > 100dB at DC, 50Hz / 60Hz  NMRR > 50dB at DC, 50Hz / 60Hz

Current

400.0mA

4.000A [1]

10.00A [1][2]

| Sine Wave: 0.8%+2d for 40Hz to 70Hz [3] 2.0%+4d for 70Hz to 1kHz [3] 2.0%+4d for 1kHz to 10kHz [4]
DC| 40.00mA

400.0mA

4.000A

| 0.2%+1d
10.00A [2]| 0.2%+2d
[1]  The bandwidth is 40Hz to 1kHz [2]  When > 10A, accuracy is unspecified, and the maximum measuring time is 30 sec. [3]  Below 10% of the range, add 2d to accuracy. [4]  Below 10% of the range, add 10d to accuracy.

• Input Impedance: < 2Ω at mA inputs, < 0.1Ω at A inputs. Bandwidth : 40Hz to 10kHz
• Minimum Resolution: 10uA
• Maximum Measuring Time:   1 minute at A inputs, 10 minutes at mA inputs.
• Rest time is 20 minutes minimum.

AC and DC Additional Specifications

[1] For square waves, the accuracy is unspecified.

• The Cut-Off Frequency of HFR: 800Hz (-3dB point) Attenuation Characteristic of HFR: Approx. -24dB

AC Conversion Type:

• The AC conversion type is ac-coupled, true rms responding, calibrated to the sine wave input.
• For non-sine wave add the following Crest Factor corrections:
• For the Crest Factor of 1.4 to 2.0, add 1.0% to AC accuracy.
• For a Crest Factor of 2.0 to 2.5, add 2.5% to AC accuracy.
• For a Crest Factor of 2.5 to 3.0, add 4.0% to AC accuracy.

Frequency Counter

Minimum Sensed Frequency: 5Hz

Frequency Counter Sensitivity

Resistance

• Maximum Open Circuit Voltage: Approx. 2.5V
• Maximum Short Test Current: Approx. 0.1mA

Continuity Check

• Maximum Open Circuit Voltage: Approx. 2.5V
• Maximum Short Test Current: Approx. 0.1mA
• Continuity Threshold: Adjustable 10 to 50 Ω, default 30Ω. Continuity
• Indicator: 2kHz Tone Buzzer

Testing Diodes

• Maximum Open Circuit Voltage: Approx. ±2.5V
• Maximum Short Test Current: Approx. ±1mA

Capacitance

Temperature

[1]  Does not include the error of the thermocouple probe. [2]  Accuracy specification assumes ambient temperature stable to ± 1°C. For ambient temperature changes of

± 2°C, rated accuracy applies after 1 hour.

Limited Warranty

• This meter is warranted to the original purchaser against defects in material and workmanship for 2 years from the date of purchase.
• During this warranty period, the Manufacturer will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction.
• This warranty does not cover Carlos fuses, disposable batteries, or damage from abuse, neglect, accident, unauthorized repair, alteration, contamination, or abnormal conditions of operation or handling.
• Any implied warranties arising out of the sale of this product, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited to the above.
• The manufacturer shall not be liable for loss of use of the instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim or claims for such damage, expense, or economic loss.
• Some states or countries’ laws vary, so the above limitations or exclusions may not apply to you.
• SEFRAM
• SEFRAM Instruments SAS 32, Rue Edouard MARTEL F42100 – SAINT ETIENNE
• France
• Tel : +33 (0)4 77 59 01 01 Fax : +33 (0)4 77 57 23 23
• E-mail :[email protected]
• Web :www.sefram.fr

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