Table of Contents
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Table of Contents
Related Manuals for Tenmars TM-87
Summary of Contents for Tenmars TM-87
- Page 1 Autoranging True RMS Multimeter TM-87 / TM-88 User’s manual HB2TM8700000...
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Page 2: Table Of Contents
TM-87/TM-88 Contents: SAFETY PRECAUTIONS AND PROCEDURES ............2 1.1. Preliminary ......................2 1.2. During use ......................3 1.3. After use ........................3 1.4. Measuring (overvoltage) categories definitions .............3 GENERAL DESCRIPTION ...................4 2.1. Mean value and TRMS: definition................4 2.2. True root mean square value and crest factor: definition........4 PREPARATION FOR USE ...................5... -
Page 3: Safety Precautions And Procedures
TM-87/TM-88 1. SAFETY PRECAUTIONS AND PROCEDURES This meter is in compliance with safety Standards EN 61010-1 related to electronic measuring instruments. For your own safety and to avoid damaging the instrument follow the procedures described in this instruction manual and read carefully all notes preceded by this symbol .When taking measurements:... -
Page 4: During Use
TM-87/TM-88 1.2. DURING USE CAUTION An improper use may damage the instrument and/or its components or injure the operator. • When changing the range, first disconnect the test leads from the circuit under test in order to avoid any accident. -
Page 5: General Description
TM-87/TM-88 2. GENERAL DESCRIPTION This meter performs the below listed measurements: • DC and AC TRMS Voltage • DC and AC TRMS Current • Resistance and Continuity test • Frequency • Capacitance • Diode test All selectable by means of a 10 position rotary selector (including OFF position). Functions keys are also available (see chapter 4.2). -
Page 6: Preparation For Use
TM-87/TM-88 3. PREPARATION FOR USE 3.1. INITIAL This instrument was checked both mechanically and electrically prior to shipment. All possible cares and precautions were taken to let you receive the instrument in perfect conditions. Notwithstanding we suggest you to check it rapidly (eventual damages may have occurred during transport –... -
Page 7: Operating Instructions
TM-87/TM-88 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT - DESCRIPTION 4.1.1. Front panel LEGEND: 1. LCD 2. HOLD Key 3. PK/ REL Key 4. MX/ MN Key 5. R/SEL Key 6. Backlight 7. OFF position 8. DCV position 9. ACV position 10. Posizione Ω/... -
Page 8: Description Of Function Keys
TM-87/TM-88 4.2. DESCRIPTION OF FUNCTION KEYS When pressing a key, the corresponding symbol is displayed with a beep. To resume default state turn the selector on another function. 4.2.1. HOLD key By pressing HOLD key the measured value is frozen on the display where the symbol "HOLD"... -
Page 9: Backlight Key ( )
TM-87/TM-88 4.2.5. Backlight key ( By pressing key it’s possible to activate the backlight function on the display. The function automatically disabled itself after some seconds and is available on each position of the rotary selector. 4.2.6. Disable Auto Power OFF When the meter is to be used for long periods of time, the operator might want to disable the AutoPowerOFF function. -
Page 10: Measurements
TM-87/TM-88 4.3. MEASUREMENTS 4.3.1. DC Voltage measurement CAUTION The maximum input for DC voltage is 1000V. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 2: Using the meter for DC Voltage measurement 1. -
Page 11: Ac Voltage Measurement
TM-87/TM-88 4.3.2. AC Voltage measurement CAUTION The maximum input for AC voltage is 750Vrms. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 3: Using the instrument for AC Voltage measurement 1. Selecting the position V 2. -
Page 12: Dc Current Measurement
TM-87/TM-88 4.3.3. DC Current measurement CAUTION The maximum input for DC current is 10A. Do not attempt to measure higher currents to avoid electrical shocks or damages to the instrument. Fig. 4: Using the instrument for DC Current measurement 1. Power off the circuit under test. -
Page 13: Ac Current Measurement
TM-87/TM-88 4.3.4. AC Current measurement CAUTION The maximum input for DC current is 10A. Do not attempt to measure higher currents to avoid electrical shocks or damages to the instrument. Fig. 5: Using the instrument for AC Current measurement 1. Power off the circuit under test. -
Page 14: Resistance Measurement And Continuity Test
TM-87/TM-88 4.3.5. Resistance measurement and Continuity Test CAUTION Before taking resistance measurements on the circuit remove power from the circuit being tested and discharge all capacitors. Fig. 6: Using the instrument for Resistance measurement and Continuity test 1. Selecting the position Ω... -
Page 15: Diode Test
TM-87/TM-88 4.3.6. Diode test CAUTION Before taking diode test on remove power from the circuit being tested and discharge all capacitors. Fig. 7: Using the instrument for Diode test 1. Selecting the position 2. Insert the test leads into the jacks, the red plug into HzVΩµA jack, and black plug... -
Page 16: Capacitance Measurement
TM-87/TM-88 4.3.7. Capacitance measurement CAUTION Before taking capacitance measurements in circuit remove power from the circuit being tested and discharge all capacitors. Use the short test lead pair for measurement to reduce the stray capacitance. Before connecting the test capacitor observe the display, which may have a reading other than zero every time the range is changed. -
Page 17: Frequency Measurement
TM-87/TM-88 4.3.8. Frequency measurement CAUTION The maximum input for AC voltage is 750Vrms. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 9: Using the instrument for Frequency measurement 1. Selecting the position Hz. -
Page 18: Temperature Test (Only For Tm-88)
TM-87/TM-88 4.3.9. Temperature test (Only for TM-88) CAUTION The maximum input of AC voltage is 24Vrms DC voltage is 60V. Do not attempt to measure higher voltages to avoid electrical shocks or damages to the instrument. Fig. 10 : Using the instrument for Temperature test 1. -
Page 19: Maintenance
TM-87/TM-88 5. MAINTENANCE 5.1. GENERAL INFORMATION This is a precision instrument. To guarantee its performances be sure to use it according to these instructions and keep it stored on suitable environmental conditions Do not expose it to high temperatures or humidity or direct sunlight. Be sure to turn it off after use. If you expect not to use the instrument for a long period remove batteries to avoid leakages of battery liquid which could damage its inner components. -
Page 20: Fuse Replacement
TM-87/TM-88 5.3. FUSE REPLACEMENT CAUTION Before replacing fuses, disconnect test leads from any energized circuit to avoid electrical shock. LEGEND: 1. Turn meter disconnect the test leads from the input terminals. 2. Unscrew the four fixing screws of the back holster and remove it. -
Page 21: Technical Specifications
TM-87/TM-88 6. TECHNICAL SPECIFICATIONS 6.1. TECHNICAL FEATURES The accuracy is indicated as [% of reading + number of digits] at 23°C±5°C, < 80%HR DC Voltage Overload Range Resolution Accuracy Input impedance protection ±(0.5%rdg + 3dgt) 400.0mV 0.1mV 4.000V 0.001V 1000VDC ±(0.5%rdg + 2dgt) - Page 22 TM-87/TM-88 Diode Test Accuracy Test Open Overload Feature Resolution (0.4 ÷ 0.8V) current voltage protection ±(1.5%rdg + 5dgt) 10mV 1.5mA <3V 600Vrms Continuity Test Overload Feature Buzzer Open voltage protection 600Vrms about 1.3V <35Ω Frequency Range Resolution Accuracy Sensitivity Overload protection 4.000kHz...
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Page 23: Electrical Specifications
TM-87/TM-88 6.1.1. Electrical specifications Conversion: TRMS Measuring rate: 1.5 times per second Temperature coefficient: 0.15×(accuracy)/°C (<18°C and >28°C) NMRR Normal Mode Rejection Ratio: > 50dB for DC parameters and 50/60Hz CMRR Common Mode Rejection Ratio: >100dB from DC up to 60Hz on DCV >... -
Page 24: General Data
TM-87/TM-88 6.1.3. General data Mechanical characteristics Dimensions: 163(L) x 88(W) x 48(H)mm Weight (including batteries): approx. 400g Power supply Battery type: 1 x 9V battery NEDA1604, JIS006P, IEC6F22 Indication of low batteries: the symbol " " is displayed when batteries are low. -
Page 25: Service
TM-87/TM-88 7. SERVICE 7.1. WARRANTY CONDITIONS This instrument is guaranteed against material or production defects, in accordance with our general sales conditions. During the warranty period the manufacturer reserves the right to decide either to repair or replace the product. - Page 28 TENMARS ELECTRONICS CO., LTD 6F, 586, RUI GUANG ROAD, NEIHU, TAIPEI 114, TAIWAN. E-mail: service@tenmars.com http://www.tenmars.com...
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