OPERATOR’S INSTRUCTION MANUAL DIGITAL MULTIMETER
SAFETY INFORMATION This multimeter has been designed according to IEC -1010 concerning electronic measuring instruments with an overvoltage category (CATⅡ) and pollution 2. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition. Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary, they must be replaced with the type specified in this manual.
DURING USE • Never exceed the protection limit values indicated in specifications for each range of measurement. • When the meter is linked to measurement circuit, do not touch unused terminals. • Never use the meter to measure voltages that might exceed 600V above earth ground in category Ⅱ installations. • When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
FRONT PANEL -3-
FRONT PANEL DESCRIPTION Display 3 1/2 digit, 7 segment, 15mm high LCD. Back light (only for MAS830L) When this button is pushed, the Back light of display is on. After about 5 seconds, the Back light is self-off. The Back light is on again, just push this button once. Rotary switch This switch is used to select functions and desired ranges as well as to turn on/off the meter. “VWmA” jack Plug in connector for red (positive) test lead for voltage, resistance and current (except 10A) measurements.
Storage temperature :-10℃ to 50℃. Low battery indication Size Weight :“ ”appears on the display :138mm×69mm×31mm : Approx.170g. DC VOLTAGE Range Resolution Accuracy 200mV 100µV ±0.5% of rdg ± 2 digits 2V 1mV ±0.5% of rdg ± 2 digits 20V 10mV ±0.5% of rdg ± 2 digits 200V 100mV ±0.5% of rdg ± 2 digits 600V 1V ±0.8% of rdg ± 2 digits Overload Protection: 250V rms. For 200mV range and 600V dc or rms. ac for other ranges. DC CURRENT Range Resolution Accuracy 200µA 0.
Overload Protection: 250V dc or rms. ac. RESISTANCE Range Resolution Accuracy 200W 0.1W ±0.8% of rdg ± 3 digits 2kW 1W ±0.8% of rdg ± 2 digits 20kW 10W ±0.8% of rdg ± 2 digits 200kW 100W ±0.8% of rdg ± 2 digits 2MW 1kW ±1.0% of rdg ± 2 digits Maximum Open Circuit Voltage: 3.2V Overload Protection: 250V dc or rms. ac for all ranges. TRANSISTOR hFE TEST (0-1000) Range Test Range Test Current NPN & PNP 0-1000 Ib=10µA Test Voltage Vce=3V OPERATING INSTRUCTIONS DC VOLTAGE MEASUREMENT 1.
AC VOLTAGE MEASUREMENT 1. Connect the red test lead to “V.W. mA” jack and the black test lead to the “COM” jack. 2. Set the rotary switch at desired ACV position. 3. Connect test leads across the source or load being measured. 4. Read voltage value on the LCD display. RESISTANCE MEASUREMENT 1. Connect the red test lead to “V. W. mA” jack and black test lead to the “COM” jack. (The polarity of red lead is positive “+”.) 2. Set the rotary switch at desired ”W” range position. 3.
NOTE: To avoid electrical shock, remove test leads from measurement circuits before testing a transistor. AUDIBLE CONTINUITY TEST 1. Connect red test lead to “V.W.mA”, black test lead to “COM”. 2. Set range switch to “ ” position. 3. Connect test leads to two points of circuit to be tested. If continuity exists, built-in buzzer will sound. BATTERY & FUSE REPLACEMENT If “ ”appears on display, it indicates that the battery should be replaced.
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