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Related Manuals for RuoShui 921
Summary of Contents for RuoShui 921
- Page 1 921 OPERATING MANUAL DIGITAL MULTIMETER RuoShui 921...
- Page 2 921 OPERATING MANUAL WARNING To avoid electric shock or injuries or damage to the instrument please read the manual carefully before operation. Ⅰ . SAFETY RULES This meter meets the standard of IEC1010. Read it before operation. 1．Check the case of the meter and test leads before operation.
- Page 3 921 OPERATING MANUAL II.KEY FUNCTION 1.REL: press this key ,readings back to zero , enter into relative measurement ,LCD display “ ” symbol, press it again, out from the relative value measurement function .when at Hz range, can switch to frequency or duty cycle (0.1~99.9%) measurement mode.
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Page 4: Technical Data
921 OPERATING MANUAL 3-1-11. Accessories: instruction manual, gift box and battery 3-2 ． TECHNICAL DATA 3-2-1．Accuracy: ±（RDG×a% + digit）at (23±5)℃,<75%RH one year guarantee from production date 3-2-2.DCV RANGE ACCURACY RESOLUTION 400mV 0.1mV ±(0.5%+4) 10mV 400V 100mV 600V ±(1.0%+4) Input resistance:10MΩ... -
Page 5: Continuity Test
921 OPERATING MANUAL 400mV range: 250V RMS ＜10seconds(manual range only). Other ranges 600VRMS＜10seconds. Frequency response: Sine wave and triangular wave : (40~1000)Hz, other waveform:( 40~400)Hz Displaying: True RMS response 3-2-4. CONTINUITY TEST Overload protection: 250VRMS Warning: do not input voltage at this range. - Page 6 921 OPERATING MANUAL RANGE ACCURACY RESOLUTION 400Ω ±(0.8%+5) 0.1Ω 4kΩ 1Ω 40kΩ 10Ω ±(0.8%+4) 400kΩ 100Ω 4MΩ 1kΩ 40MΩ ±[1.2%+ 5] 10kΩ OCV: more than 400mV Overload protection: 250VRMS. NOTE: At 400Ω range, you should make the test leads short to measure the wire resistance, then, subtracts from the real measurement.
- Page 7 921 OPERATING MANUAL 3-2-8. Frequency(Hz/DUTY) Range Accuracy Resolution 100Hz 0.01Hz 1000Hz 0.1Hz 10kHz ±(0.5%+4) 100kHz 10Hz 1MHz 100Hz 10MHz 1kHz Input sensitivity: 3V Vp-p ( range 10MHz: more than 3.5V Vp-p) Overload protection: 250V DC/AC peak value. Ⅳ. OPERATION 4-1．DCV MEASUREMENT 4-1-1.
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Page 8: Acv Measurement
921 OPERATING MANUAL range. 2． Do not input voltage over DC 600V, or, the circuit might be damaged. 3． Be careful when measuring high voltage circuit. 4-2 ． ACV MEASUREMENT 4-2-1. Set the knob to a proper “V” range. 4-2-2. The default mode of this meter is auto range , LCD display“... - Page 9 921 OPERATING MANUAL Do not input any voltage at this range . 4-4 ． DIODE MEASUREMENT 4-4-1.Set the knob to “” range 4-4-2.Positive measurement: connect the red test lead to the anode terminal and the black one to the cathode terminal of the diode under tested.
- Page 10 921 OPERATING MANUAL no idea of the measured resistance range beforehand, should set the range knob to a higher one. 2． If resistance is over selected range value, “OL” displays, should set the knob to a higher range. When measuring value is over 1MΩ, the reading will take a few seconds...
- Page 11 921 OPERATING MANUAL 5． Release the capacitor completely before measuring. 6． The input reading stability is over 15 seconds at 2000 μF 4-7.FREQUENCY MEASUREMENT 4-7-1.Set the range knob to “Hz/DUTY” ,connect the test lead to the circuit under tested .
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Page 12: Troubleshooting
921 OPERATING MANUAL high temperature, high humidity, combustible, explosive and strong magnetic place. 3. Wipe the case with a damp cloth and detergent, do not use abrasives and alcohol. 4. If do not operate for a long time, should take out the battery to avoid leakage. - Page 13 921 OPERATING MANUAL The content of this manual is regarded as correct, error or omits Pls. contact with factory. We hereby will not be responsible for the accident and damage caused by improper operation. The function stated for this User Manual cannot be the reason of special usage.
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