ES51961

3 3/4 MANU DMM Features •3 3/4 digits manual and bargraph display •Multiple function system •Logic probe, logic high level 4.0V, 2.4V, 1.5V selectable, 20 MHz •Analog to digital converter •Frequency counter (400 MHz) •OP amplifier •Full scale range change by ×2, ×10, ×20, ÷ 5, ÷ 10 •Peak hold, catch the PMAX and PMIN ( 4.0V) and the buzzer turn on. The above panel means now is logic unknown (the input between 0.8V~2.4V) and once the LOGIC level change to high (>2.4V), the buzzer will turn on. 9 2006/1/24 3 3/4 MANU DMM ES51961 The above panel means now is logic high (the input > 1.5V) and once the LOGIC level change to low ( 2 sec "PM A X " active " PM IN " activ e m ax . p eak value m in. p eak v alu e 1 p u sh < 1 sec (* 1): p ush R A N G E > 1 sec *2: Under the RESET (semiauto) or PEAK mode, if press PEAK > 2 sec, the PEAK function will enter to calibration mode, the LCD will show "CAL." and the internal buffer will remember the internal OP offset voltage then back to the manual mode. Whenever the PEAK function is enabled again, the reading value will minus the offset voltage, the purpose is to get the real peak reading. *3: Under PEAK mode, the bargraph always show current value. *4, *5: Please see page 16 note 3. (5) RANGE: The ranges of voltage, frequency and logic modes is selected by RANGE pin. The following are the operation flow chart of them. Voltage mode: RESET (Semiauto) 1 push < 1 sec 1 push > 1 sec MANU 1 push < 1 sec (change OR's state) Frequence mode: RESET (Automatic) 1 push < 1 sec 1 push > 1 sec MANU 1 push < 1 sec (change measuring range) Logic mode: default (4.0V) 1 push can change the logic high reference voltage between 4.0, 2.4 and 1.5V. 14 2006/1/24 3 3/4 MANU DMM MP ES51961 The default state is H (0V). When MP="H", if turn MAX/MIN or PEAK on, OR and range keep original state. If MP=”L”, whether the original state of OR is “H” or “L”, if active MAX/MIN or PEAK, the OR’s state will be set to “H”. OR This pin is used to set/indicate the measured ranges. The criterion of OR pin changing are: (1) if under continuity, frequency, logic or diode mode, the OR is always L. (2) under volt1~volt4 mode and MP="L", if MAX/MIN or PEAK active, the OR="H". (3) except situation (1), (2) (i.e. volt1~volt4 mode and MP=”H”), if turning HOLD, MAX/MIN, REL, PEAK on, the system will enter into manual mode and OR keep its original state. (4) except situation (1)~(3), under semiauto mode, if (FC1,FC2,FC3)=(1,1,1) and D10 on, then (i) OR "H", if high resolution ≥2000 counts (ii)OR keeps its original state, if 380≤ high resolution