V 1.3 

10 

2018/08/03 

ES289

20000 Counts Manual DMM

1.5.

Capacitance Measurement

The following table summarizes the eight ranges of capacitance measurement mode.

Configuration

1

Full Scale Range

Relative Resistor

Measurement Period

C1

3

20.000nF

Ratio to C2

0.35 sec

C2

2

200.00nF

CAL

0.35 sec

C3

2.0000uF

Ratio to C2

0.35 sec

C4

20.000uF

Ratio to C2

0.7 sec (max)

C5

200.00uF

Internal matching

0.7 sec (max)

C6

2.0000mF

Internal matching

3.5 sec(max)

C7

20.000mF

Internal matching

7 sec(max)

C8

200.00mF

Internal matching

35 sec(max)

Note:

1. In order to obtain an accurate reading, a capacitor must be discharged before measurement begins. The chip has

a built-in discharge mode to automatically discharge the capacitor. In discharge mode, the main-display shows

dIS.C. Discharging through the chip is quite slow. We recommend users to discharge the capacitor with some

other apparatus.

2. The C2 range is calibrated in calibration scheme.

3. The C1 range residual offset could be compensated by the small capacitors near to OVH pin.

1.6.

Continuity Check

Continuity check shares the same configuration with 200.00Ω manual resistance measurement

mode and has buzzer output to indicate continuity. The buzzer generates 2KHz beep and ALARM

(pin 40) drive high output (V+ level) whenever the reading is less than 30Ω. The ES289 built in a

high speed short detection circuit and the detection period could be less than 10ms.

1.7.

Diode Measurement

Diode measurement mode shares the same configuration with 2.0000V manual voltage

measurement mode and has buzzer output to indicate continuity. The buzzer generates a 2KHz sound

and ALARM (pin 40) drive high output (V+ level) whenever the reading is less than 30mV. The

source output voltage is the same as V+ terminal. If the test circuit is open or the voltage drop

between the two ports of the diode under test is larger than 2V or 2.8V (depends on DIOV pin level),

the LCD panel will show “OL”.

DIOV(pin46)

DGND/Floating

V-

OL

2.000V

2.800V