Digital Multimeter Users Manual Read this manual thoroughly before use 3085A
WARRANTY This instrument is warranted to be free from defects in material and workmanship for a period of one year. Any instrument found defective within one year from the delivery date and returned to the factory with transportation charges prepaid, will be repaired, adjusted, or replaced at no charge to the original purchaser. This warranty does not cover expandable items such as battery and fuse.
SAFETY INFORMATION This meter has been designed according to IEC 61010 concerning electronic measuring instruments with a measurement category ( CAT II 600V ) and pollution degree 2. Warning To avoid possible electric shock or personal injury, follow these guidelines: Do not use the meter if it is damaged. Before you use the meter, inspect the case. Pay particular attention to the insulation surrounding the connectors. Inspect the test leads for damaged insulation or exposed metal.
Use caution when working with voltage above 30V ac rms, 42V peak, or 60V dc. Such voltages pose a shock hazard. When using the probes, keep your fingers behind the finger guards on the probes. When making connections, connect the black test lead before you connect the red test lead. When you disconnect test leads, disconnect the red test lead first. Remove the test leads from the circuit ( or object ) under test before you open the back cover or the case.
Do not make current measurement on any circuit which contains voltage higher than 600V. Remaining endangerment: When a test lead is connected to dangerous live potential, it is to be noted that this potential can occur at the other test lead. CAT II- Measurement Category II is for measurements performed on circuits directly connected to low voltage installation. Examples are measurements on household appliances, portable tools and similar equipments.
Before turning the rotary switch to change function, remove the test leads from any circuit under test. Symbols Alternating Current Direct Current DC or AC Caution, risk of danger, refer to the operating manual before use. Caution, risk of electric shock. Earth ( ground ) Terminal Conforms to European Union directives The equipment is protected throughout by double insulation or reinforced insulation.
FRONT PANEL 2 3 1 4 5 6 7 Figure 1 1. Test Leads 2. NCV Sensor An sensor used in non-contact ac voltage detection. It is located at the mark " NCV " which is just beside the LCD display. 3.
4. " HOLD " key Used to enter or exit Data Hold mode. 5. " FUNC " key Used to switch between: DC current and AC current measurement functions. DC voltage and AC voltage measurement functions. Resistance, diode, continuity and capacitance test functions. 6. LED Indicator This LED indicator lights when the built-in buzzer sounds. 7. Rotary Switch Used to select desired function as well as to turn on or off the meter. To save battery charge, set this switch in the " OFF " position when the meter is not in use.
direction to lock the meter. To unfold the meter, use the reverse procedure.
Explanations: 1. ...... The meter is in Data Hold mode. 2. ...... Continuity test function is selected. 3. ...... Diode test function is selected. 4. ...... The battery is low and must be replaced immediately. 5. ...... Autorange mode is selected. 6. ...... DC 7. ...... Negative sign 8. ......
9.
Sampling Rate: About 3 times/sec Low Battery Indication: " " shown on the display Battery: 1.5V battery, AAA or equivalent, 1 piece Operating Environment: Temperature: 0°C to 40°C Relative Humidity: < 75% Temperature Coefficient: 0.
Accuracy specifications take the form of: ±([% of Reading]+[number of Least Significant Digits]) DC Voltage Range Resolution Accuracy 400mV 0.1mV ± (0.8% + 5) 4V 0.001V ± (0.5% + 5) 40V 0.01V 400V 0.1V 600V 1V Overrange Indication [1] ± (0.8% + 5) Input Impedance: 10M Max. Allowable Input Voltage: 600V dc Note: When the test leads are open, the display may show a reading other than zero. This is normal and will not affect measurements.
AC Voltage Range Resolution 4V 0.001V 40V 0.01V 400V 0.1V 600V 1V Accuracy ± (1.0% + 5) Overrange Indication [1] Input Impedance: 10M Max. Allowable Input Voltage: 600V ac rms Frequency Range: 40Hz to 400Hz Response: Average, calibrated in rms of sine wave Note: When the test leads are open, the display may show a reading other than zero. This is normal and will not affect measurements. When the voltage being measured is more than 600V, the built-in buzzer will sound.
Overload Protection: 500mA/250V Fast fuse Max. Allowable Input Current: 400mA When the current being measured is more than 410.0mA, " OL " will be shown on the display. AC Current Range Resolution Accuracy 40mA 400mA 0.01mA 0.1mA ± (1.5% + 5) Overrange Indication Overload Protection: 500mA/250V Fast fuse Max. Allowable Input Current: 400mA Frequency Range: 40Hz to 400Hz Response: Average, calibrated in rms of sine wave When the current being measured is more than 410.
Resistance Range Resolution 400 4k 40k 0.1 0.001k 0.01k 400k 0.1k 4M 40M 0.001M 0.01M Overrange Indication Accuracy ± (1.2% + 5) ± (1.0% + 5) [1] ± (1.2% + 5) ± (1.5% + 5) Open Circuit Voltage: About 1V When the resistance being measured is more than 41M , " OL " will be shown on the display. Frequency Range 4.000Hz 40.00Hz 400.0Hz 4.000kHz 40.00kHz 400.0kHz 4.000MHz Resolution 0.001Hz 0.01Hz 0.1Hz 0.001kHz 0.01kHz 0.1kHz 0.001MHz Input Voltage: 1V rms - 20V rms 15 Accuracy ± (1.
Capacitance Range Resolution Accuracy 4nF 40nF 400nF 4µF 40µF 400µF 4mF 0.001nF 0.01nF 0.1nF 0.001µF 0.01µF 0.1µF 0.001mF ± (5.0% + 20) ± (3.5% + 5) ± (5.0% + 10) Diode and Continuity Test Range Description The approx. forward voltage drop of the diode will be displayed. Remark Open Circuit Voltage: about 2.2V The built-in buzzer will sound if the resistance is less than about 50 . If the resistance is between 50 and 100 , the buzzer may or may not sound.
OPERATING INSTRUCTION Data Hold Mode To hold the present reading on the display, press the " HOLD " key. The meter enters Data Hold mode, and the symbol " " appears on the display as an indicator. To exit the Data Hold mode, press this key again. " " disappears. Measuring DC or AC Voltage 1. Set the rotary switch in the position. 2. If you want to measure DC voltage, press the " FUNC " key until " " appears on the display.
Note: To avoid electric shock to you or damage to the meter, do not apply a voltage higher than 600V between the terminals. Measuring DC or AC Current 1. Set the rotary switch in the position. 2. If you want to measure DC current, press the " FUNC " key until " " appears on the display. If you want to measure AC current, press the " FUNC " key until " " appears on the display. 3. Turn off power to the circuit to be tested, and then discharge all capacitors. 4.
Measuring Resistance 1. Set the rotary switch in the position. 2. Press the " FUNC " key until there are no symbols " " and " " and capacitance measurement unit on the display. 3. Connect the test leads across the resistor to be tested. 4. Wait until the reading is stable, then read the reading on the display. Note: 1. For measurements > 1M , the meter may take a few seconds to stabilize reading. This is normal for high resistance measurements. 2.
4. If the resistance is less than about 50 , the built-in buzzer will sound. Note: Before test, disconnect all power to the circuit to be tested and discharge all capacitors thoroughly. Diode Test 1. Set the rotary switch in the position. 2. Press the " FUNC " key until the symbol " " appears on the display. 3. Connect the red test lead to the anode of the diode to be tested and the black test lead to the cathode of the diode. 4. The display shows the approximate forward voltage drop of the diode.
3. If the display shows a value other than zero, this value must be subtracted from the subsequent measurements to get more accurate readings. 4. Connect the test leads across the capacitor to be tested. 5. Wait until the reading is stable, then read the reading on the display. Note: 1. Before measurement, make sure that the capacitor to be tested has been discharged thoroughly. 2. For high capacitance measurements, it may take about 30 secs for the meter to complete measurement and stabilize reading.
Note: 1. The voltage of input signal should be between 1V rms and 20V rms. The higher the frequency of input signal, the higher the required input voltage. 2. The frequency of input signal must be more than 1Hz. Non-Contact AC Voltage Detection 1. Set the rotary switch in NCV position. The display shows " EF " ( refer to Figure 4 ). 2. Move the meter NCV sensor located at the " NCV " mark just beside the LCD display ( see Figure 1 ) close to the object to be tested.
Figure 4 Figure 5 Note: 1. Detection Range: 90V - 600V Frequency Response: 50Hz/60Hz 2. The meter's electric field intensity indication is affected by the magnitude of the ac voltage of the conductor under test, the distance between the meter and the conductor, the insulation of the conductor, and etc. 3. Because of the meter's detection limit, a line ( or conductor) under test may be electrically live even if the meter does not indicate presence of electric field. 4.
it will turn off automatically and go into Sleep mode. To arouse the meter from Sleep, just press a key or turn the rotary switch. To disable the automatic power-off feature, turn the rotary switch from the " OFF " position to other switch setting while holding down the " FUNC " key. MAINTENANCE Warning Except replacing battery and fuse, never attempt to repair or service the meter. Store the meter in a dry place when not in use. Don't store it in an environment with intense electromagnetic field.
and battery and/or review this manual to verify proper use of the meter. Battery and Fuse Replacement Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the low battery indicator ( ) appears. To prevent damage, electric shock or personal injury, use only replacement fuse specified. Before opening the back cover or the case, turn off the meter and remove the test leads from any circuit under test.
To replace the fuse, remove the screws on the back cover and open the back cover. Replace the blown fuse with a new fuse of the same ratings. Reinstall the back cover and the screws. The meter uses one fuse: 500mA/250V fuse, Ø5X20mm ACCESSORIES Manual: 1 copy NOTE 1. This manual is subject to change without notice. 2. Our company will not take the other responsibilities for any loss. 3. The contents of this manual can not be used as the reason to use the meter for any special application.
DISPOSAL OF THIS ARTICLE Dear Customer, If you at some point intend to dispose of this article, then please keep in mind that many of its components consist of valuable materials, which can be recycled. Please do not discharge it in the garbage bin, but check with your local council for recycling facilities in your area.
