Table of Contents
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ITEM 98674
DIGITAL MULTIMETER
OPERATION MANUAL
DIGITAL MULTIMETER
CONTENTS
1.
SAFETY INFORMATION
1.1
PRELIMINARY
1.2
DOS AND DON'TS
1.3
SYMBOLS
1.4
MAINTENANCE
2.
DESCRIPTION
2.1
NAMES OF PARTS
2.2
SWITCH, BUTTONS AND INPUT JACKS
2.3
LIQUID-CRYSTAL DISPLAY (LCD)
3.
SPECIFICATIONS
3.1
GENERAL SPECIFICATIONS
3.2
TECHNICAL SPECIFICATIONS
4.
OPERATION INSTRUCTION
4.1
MISCONNECTION ALARM
4.2
HOLDING READINGS
4.3
SWITCHING FUNCTIONS
4.4
SWITCHING RANGES
4.5
SWITCHING BETWEEN FREQUENCY/DUTY
4.6
SWITCHING TO RELATIVE MEASUREMENT
4.7
BACK LIGHT
4.8
AUTO POWER OFF
4.9
PREPARING FOR MEASUREMENT
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Related Manuals for CEN-TECH ITEM 98674
Summary of Contents for CEN-TECH ITEM 98674
- Page 1 DIGITAL MULTIMETER CONTENTS CONTENTS SAFETY INFORMATION …1 PRELIMINARY …1 DOS AND DON’TS …2 ITEM 98674 SYMBOLS …3 DIGITAL MULTIMETER MAINTENANCE …4 DESCRIPTION …6 NAMES OF PARTS …7 SWITCH, BUTTONS AND INPUT JACKS …8 LIQUID-CRYSTAL DISPLAY (LCD) …10 SPECIFICATIONS …12 GENERAL SPECIFICATIONS …12...
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Page 2: Table Of Contents
DIGITAL MULTIMETER DIGITAL MULTIMETER CONTENTS SAFETY INFORMATION NTS 4.10 MEASURING DC VOLTAGE …29 1. SAFETY INFORMATION 4.11 MEASURING AC VOLTAGE …30 WARNING 4.12 MEASURING FREQUENCY …31 BE EXTREMELY CAREFUL WHEN USING THIS METER. Improper use of this device can result in 4.13 MEASURING DUTY …32... -
Page 3: Symbols
DIGITAL MULTIMETER DIGITAL MULTIMETER SAFETY INFORMATION NT SAFETY INFORMATION NTS 1.1.2 When the meter is delivered, check whether it has 1.2.7 Do not connect the meter to any voltage source while the rotary selector is in the current, resistance, been damaged in transit. capacitance, diode, continuity range. - Page 4 DIGITAL MULTIMETER DIGITAL MULTIMETER SAFETY INFORMATION NTS SAFETY INFORMATION NTS - double insulation （ P rotection class ） 1.4.5 Use damp cloth and mild detergent to clean the meter; do not use abrasives or solvents. CAT II - overvoltage (installation) category II, pollution degree 2 per IEC1010-1, referring to the level of 1.4.6 Turn the rotary selector to OFF position to switch off impulse withstand voltage protection provided.
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Page 5: Description
DIGITAL MULTIMETER DIGITAL MULTIMETER DESCRIPTION NTS SAFETY INFORMATION NTS 2. DESCRIPTION measuring ambient humidity and temperature, as well as temperature of objects. - This meter is a portable professional measuring instrument with large LCD to show three lines of - The digital multimeter can perform measurements of readings, as well as back light for easily reading. -
Page 6: Switch, Buttons And Input Jacks
DIGITAL MULTIMETER DIGITAL MULTIMETER SAFETY INFORMATION NTS SAFETY INFORMATION NTS SELECT Button - for switching among measuring functions RANGE Button - for switching between auto and manual ranges. Hz/DUTY Button - for switching between Hz and duty measurement. REL Button - for switching to relative measurement. -
Page 7: Liquid-Crystal Display (Lcd)
DIGITAL MULTIMETER DIGITAL MULTIMETER SAFETY INFORMATION NTS SAFETY INFORMATION NTS Humidity Sensor ~ AC Alternating Current - for measuring humidity. Direct Current Light Sensor AC or DC (alternating current or direct current) - for measuring luminance. Diode Microphone Continuity buzzer - for measuring sound level (dB). -
Page 8: Specifications
DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS SPECIFICATION NTS 3. SPECIFICATIONS 3.1.18 Operating temperature: 0 ℃ to 40 ℃ （ 3 2 F to 104 F ） Calibration is required once a year, to be carried out at a 3.1.19 Storage temperature: -10 ℃... - Page 9 DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS SPECIFICATION NTS 3.2.2 AC Voltage 3.2.3 DC Current Range Resolution Accuracy Range Resolution Accuracy 400mV 0.1mV 400 A 0.1 A (0.8% of reading + 3 digits) 4000 A 10mV 40mA 10 A （ 1 .2% of reading + 3 digits ）...
- Page 10 DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS SPECIFICATION NTS 3.2.4 AC Current 3.2.5 Resistance Range Resolution Accuracy Range Resolution Accuracy 400 A 0.1 A 4000 A (1.2% of reading + 2 digits) 40mA 10 A （ 1 .5% of reading + 5 digits ）...
- Page 11 DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS SPECIFICATION NTS 3.2.7 Frequency - Max. input current: mA jack （ A ranges ） : 4mA, Range Resolution Accuracy mA jack （ m A ranges ） : 400mA, 9.999Hz 0.001Hz 2 .0% of reading + 5 digits （...
- Page 12 DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS SPECIFICATION NTS Input Impedance: 10M 3.2.10 Temperature Max. Input Voltage: 1000V DC or 750V rms AC 3.2.10.1 Temperature （ o n sensor, thermoresistor NTC and temperature display ） - By A, mA or A range: Frequency response: 0 ~ 40kHz Range Resolution...
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Page 13: Misconnection Alarm
DIGITAL MULTIMETER DIGITAL MULTIMETER SPECIFICATION NTS OPERATING INSTRUCTION 3.2.12 Luminance （ L ux ） 4. OPERATING INSTRUCTION Range Resolution Accuracy 4.1 MISCONNECTION ALARM Lux (4000) 1 Lux （ 5 .0% of reading + 10 digits ） The input jacks of the meter are equipped with sound and at color temp. -
Page 14: Holding Readings
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION At the same time, the lights at the “10A” and “COM” to the lowest level when the highest level is reached. jacks will flash to remind the user to plug in the test ）... -
Page 15: Back Light
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION ） T he meter will enter the manual range mode after the again to switch off the back light. “REL” button is pressed. REL mode is not available ） T he back light will go off automatically after 10 for Hz/Duty range because it is an automatic range. -
Page 16: Measuring Dc Voltage
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION ） Turn the rotary selector or press any of the 4.10 MEASURING DC VOLTAGE “HOLD/B.L”, “SELECT”, “RANGE”, “Hz/DUTY” or WARNING “REL” button to resume operation of the meter under Beware of electrocution. auto the power off mode. -
Page 17: Measuring Ac Voltage
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION 2) Under the manual range mode, when only ‘OL’ or ‘-OL’ NOTE: is shown on the LCD, it means the measurement has 1) At small voltage range, unsteady readings may appear exceeded the range. A higher range should be before the test leads contact the circuit. -
Page 18: Measuring Duty
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION 4.14.4 Connect the test leads to the circuit for measurement. 4.13 MEASURING DUTY 4.14.5 Take the reading on the main indicator of the LCD. 4.13.1 Plug the black test lead into the COM jack and the The polarity symbol denotes the polarity of the end red test lead into the Hz jack. -
Page 19: Measuring Resistance
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION test lead into the 10A jack. 4.16 MEASURING RESISTANCE 4.15.2 Set the rotary selector to the A range position. WARNING 4.15.3 Press the "SELECT" button to switch to AC Beware of Electrocution. measurement. -
Page 20: Measuring Capacitance
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION 4.17 MEASURING CAPACITANCE 4.18.3 Press the "SELECT" button to switch to test. 4.18.4 Connect the red test lead to the anode and the black WARNING test lead to the cathode of the diode for testing. Beware of Electrocution. -
Page 21: Measuring Relative Humidity
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION 4.21 MEASURING TEMPERATURE 4.19.6 Read the resistance on the main indicator of the LCD. (WITH THERMO-RESISTOR) NOTE: 4.21.1 This function is used for measuring the ambient If the test leads are open or the resistance of the circuit is temperature around the meter. -
Page 22: Measuring Temperature
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION 4.22 MEASURING TEMPERATURE 4.23 MEASURING SOUND LEVEL (dB) (WITH THERMOCOUPLE) WARNING WARNING To avoid damage to the meter, do not connect the input plug to any electric signal. Beware of electrocution. To avoid electrical shock, do not connect the 4.23.1 Turn the rotary selector to the dB range position. - Page 23 DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION OPERATING INSTRUCTION NOTE: clerical work 700 ~ 1,500 ） W hen only ‘OL’ appears on the LCD, it means typing 1000 ~ 2,000 over-range and a higher range should be selected. Factory S pectral sensitivity characteristic: ）...
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Page 24: Maintenance
DIGITAL MULTIMETER DIGITAL MULTIMETER OPERATING INSTRUCTION MAINTENANCE Appendix: 5. MAINTENANCE Conversion between luminance and light intensity: E = I / r 5.1 REPLACING THE BATTERIES where E --- luminance, unit: Lux ； WARNING I --- intensity of light source, unit: cd ；... -
Page 25: Replacing Test Leads
DIGITAL MULTIMETER DIGITAL MULTIMETER MAINTENANCE MAINTENANCE 5.2.4 Put the battery cover back and fix it again to its 5.3 REPLACING TEST LEADS original form. WARNING WARNING The replacement must be test leads in good To avoid electric shock, make sure that the test leads working condition with the same or equivalent have been clearly move away from the circuit under rating: 1000V 10A. -
Page 26: Accessories
DIGITAL MULTIMETER ACCESSORIES 6. ACCESSORIES 1) Test leads: electric rating: 1000V 10A 1 pair (set) 2) Thermocouple (K type TP01) 1 set 3) Operation Manual 1 copy - 48 -... - Page 27 HYS005958...
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Questions and answers
how many Megaohms internal impedance does it have
The internal impedance of the CEN-TECH ITEM 98674 is 10 Megaohms (10MΩ).
This answer is automatically generated
Testing For Parasitic Draw
On "Frequency" measurement (Hz), what is the usable range of frequency, and allowable or effective amplitude range for the input signal to be measured? (Cen-Tech multimeter P98674)
The usable frequency range for input signals measured by the CEN-TECH multimeter ITEM 98674 is 0 to 200kHz. The allowable amplitude (input voltage) range for frequency measurement is 0.5V to 10V rms AC, with higher input voltage allowed at higher frequencies.
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