Uni-T UT171A [8/20] Measuring ac dc voltage see figure 3
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Uni-T UT171A [8/20] Measuring ac dc voltage see figure 3

Uni-T UT171A [8/20] Measuring ac dc voltage see figure 3

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UT171A B C Instructions Hz Setup button of frequency duty ratio direction selection setting Hz dick to make frequency duty ratio switch applicable to V l Hz only Setup long press the button to enter system setting menu Main displayer setting item and auxiliary displayer setting parameters Setting items include brt BRIGHTNESS for backlight Usb USB for communication on off bEEp IX Measuring Operation Instructions First of all please check the built in battery When the instrument is on in case of low battery it will display the symbol of a on the LCD indicating that it is necessary to replace battery or charge in time before KEY BEEP for buzzer switch on off ALO ALO TIME for automatic light off APO APO TIME for using When instrument detects low power in battery it will force itself to enter sleep mode Besides it is automatic power supply off RTC DATE for Date setting UT171C only RTC TIME for Time setting also necessary to notice the symbol of A beside probe socket which warns you of not exceeding the UT171C only DEL FORMAT MEM for memory formatting Short press the or button to select indicated figure for voltage or current under test so as to ensure measuring safety setting item Short press HOLD button to exit setting menu In the setting items alter parameters of setting items through RANGE button or MAXMIN button In the setting item of format memory if parameter displayed on the auxiliary displayer is YES operation of memory formatting will be executed by short pressing SELECT button and all the data saved will be cleared Caution after setting parameters are altered it is necessary to short press HOLD button or turn the knob to any gear non OFF gear location to exit the function of setting menu It is not allowed to turn to OFF gear without exiting setting menu so as to prevent loss of setting data UT171A B C Instructions SELECT V F C button of selection measurement on voltage or current to frequency conversion SELECT dick to select function applicable to complex function only V F C in AC voltage mode long press the button for 2 seconds or more and LCD will display V F C It will be allowed to enter the mode of V F C measurement for stable measurement on voltage to frequency conversion Long press the button for 2 seconds or more again and it will be allowed to exit the mode of V F C measurement SELECT dn mV gear long press the button to enter or exit the function of temperature measurement only applicable to UT171B C SELECT in mA gear long press the button to enter or exit 4 20mA only applicable to UT171B C 1 Measuring AC DC voltage see Figure 3 AC measuring displayed value is true virtual value During in circuit measurement press Hz button to select the mode of measurement on frequency duty ratio for auxiliary displayer In the DC voltage function gear press SELECT button to select mode of AC DC measurement press HZ button and auxiliary displayer will display AC DC HZ values orderly and AC DC value will be displayed on main displayer In low resistance LoZ in AC gear auxiliary displayer displays Hz or duty ratio press Hz button to switch A Caution Input impedance of instrument is higher which is about 10MQ The load will cause error in measurement in high impedance circuit Mostly if circuit impedance is lower than 10k error can be ignored 0 1 or lower Do not input voltage higher than 1 OOOVrms It is accessible to measure higher voltage However it is likely to damage the instrument In measuring of high voltage it is necessary to prevent electric shock hazard in particular To test the known voltage before use to confirm the product function is correct SELECT in uAgear long press the button to enter or exit square wave function UT171C only 11 12

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