Page 1: ...ET3240 4 Benchtop Digital Multimeter ET3255 5 Benchtop Digital Multimeter User s Manual Hangzhou Zhongchuang Electronics Co Ltd...
Page 2: ...function 4 1 Voltage measurement 4 1 1 DC Voltage measurement 4 1 2 AC voltage measurement 4 2 Current measurement _ 42 1 DC eurrent measurement 4 2 2 AC current measurement 4 3 Resistance measurement...
Page 3: ...libration 8 1 DC voltage calibration 8 2 AC voltage calibration 8 3 DC current calibration 84 AC current calibration 8 5 Resistance calibration 8 6 Capacitance calibration 9 Communication Interface 10...
Page 4: ...to cause damage to the instrument or endanger the safety When measuring you must select the correct measurement function and he measurement range Before the function range is switched disconnect the...
Page 5: ...h devices and circuits ument for overload protection can easily exceed he limit of thus ms Environment related notes This instrument complies with the requirements on marking under WEEE Directive 2002...
Page 6: ...X B MAX MIN Average dBB dBm Rel Limits Compare Statistics a IX Temperature Thermocouple K N R S T B F I WRe325 WRe526 Thenmal resistance PT 100 PTS0 Cul00 Cu50 Built in hermocouple cold junction tempe...
Page 7: ...1 the regional description see Table 3 2 2 3 ete al 2 00000 100 0 Figure 3 1 Front panel diagram Description fl Measurement ternimal of multimeter 2 Display screen 3 Basic measurement function keys 4...
Page 8: ...key 2 wire 4 wire resistance measurement key Capacitance measurement key Frequency period measurement key Diode on oll measurement key 3 4 4 Mathmatic function keys Statics key In the voltage DC volt...
Page 9: ...mode press the key to change the trigger made to auto trigger TRIG an Single trigger key Press the key to change the multimeter measurement mode to single trigger Each time the key is pressed the mete...
Page 10: ...st function switch The temperature measurement function key combination Press the key combination to turn on the temperature measurement function Depending on the type of temperature sensor used press...
Page 11: ...it 2 After the voltage up to 1000 VDC is measured it is better to wait for about 2 minutes and then conduct the low voltage measurement with the resolution rate 1 to 10 uV 3 After using the A input te...
Page 12: ...ropriate range or select the auto range CML mode by pressing _ 70 press the left right arrow key to select the appropriate me urement speed 4 Start the measurement AUTO IRL 1 00000 1 OOOk Hz AUTO 2V A...
Page 13: ...sents the ratio of the current measured value to the full scale valuc 2 Choose different test terminals according to the measurement level See Figure 4 6 for current of 200mA and below and connect the...
Page 14: ...ight arrow key to select the appropriate measurement speed 4 Start the measurement mor mon ej Figure 4 9 Wiring method for low current Figure 4 10 Wiring method for high current measurement measuremen...
Page 15: ...in Figure 4 13 2 Connect the red and black test leads to the corresponding input terminals as shown in Figure d 14 3 Press the up down arrow key to manually select the appropriate range or select the...
Page 16: ...igure 4 18 3 Press the up down arrow key to manually select the appropriate range or select the auto range cht mode by pressing AT A Start the measurement PERIOD WAN SAANE ERE 1 00000 Local en wi Figu...
Page 17: ...than 2KO display readings 2 When the measured value is lower than the set short circuit resistance value the buzzer sounds The short circuit resistance value defaults to 300 3 The short circuit resis...
Page 18: ...acitor 4 7 Duty cycle measurement En 1 Press wi to select the duty cycle measurement function The measurement interface is shown in Figure 4 25 2 Connect the red and black test leads to the correspond...
Page 19: ...ere Y is the value displayed in the secondary display arca M isa monomial coefficient B s a constant 2 In the interface shown in Figure 5 2 press the Enter key to call up the M value modification show...
Page 20: ...ified Figure 5 7 dBm reference resistance modified interface interface Note 1 dBm 10 log10 Vauca Ree 0 001 where Vaca is the measured value displayed in the main display area n the case ofamillivolt r...
Page 21: ...upper limit setting interface press the Enter key to call up the lower limit setting interface The up down left right arrow key can be used to modify the lower limit value DCy WO NGTOTRE 0 80000 de 0...
Page 22: ...save function Figure 5 14 Data readback function Note 1 The save function saves the function name trigger mode range mode display range sampling rate measured value etc under the measurement function...
Page 23: ...perature measurement measurement 6 System settings mur Press _ 5 to enter the system setting interface as shown in Figure 6 IL In this interface you can view the instrument model serial number version...
Page 24: ...ble 7 1 _DC Volage range indicators Note 1 Full range overload protection 1000V Except DCV 1000V range all other ranges are 120 overragne 2 200mV range and 2V range input impedance IGO other ranges in...
Page 25: ...O 20MO 0 1 10 0 0001MO 200MO H5 20 0 001MO Table 7 5 Resistance range indicators For range below 200MO the open circuit voltage ts about 3V 7 6 Capacitance 7 7 Frequency Accuracy u 2 15 0 5 __ __ 00OU...
Page 26: ...n 5 0 95 0 3 20 0 001 Table 7 10 Duty cycle measurement indicator 7 1 Temperature The range and error ofthe temperature measurement depends on the temperature sensor used The temperature display accur...
Page 27: ...splay range in DC voltage measurement is 200mV so the calibration start range is 200mV afler a remote instruction 200mV calibration steps 1 Enter OmV according to the prompt of zone 3 in Figure 8 1 Pr...
Page 28: ...o FLASH You can press any of the basic function keys to exat the calibration function or you can choose to continue calibrating he next range 200V calibration steps 1 Enter OV according to the prompt...
Page 29: ...calibration when the range is switched from 200mA to 2A to ensure that the multimeter and personal safety please promptly adjust the input terminal wiring 8 4 AC current calibration Please refer to t...
Page 30: ...en the calibration is completed and the next range isswitched the calibration data for that range has been saved and the calibration procedure can be exited at any time 8 6 Capacitance calibration Ple...
Page 31: ...are installation and use See the Operating Instructions in the software CD attached 11 Maintenance and upkeep 11 1 General maintenance and repair Multimeter is a precision measuring instrument please...
Page 32: ...chuang Electronics Co Ltd Adress NO 3 Kangle Road Gongshu District Hangzhou _ Postcode 310015 Telephone 0571 56861333 Fax 0571 56861355 Website hitp www enheader com http wwweasttester com QQ 28537057...
