NJU9214 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU9214

4•3/4 DIGIT SINGLE CHIP DIGITAL MULTIMETER LSI

Japan Radio Corporation  

NJU9214

(2-2-2) Range setting ( Push type switch : KMS = " L ", RMS = " X " )

The range setting shown in below table is available with the " RANGE " switch.

When the switch is pressed once, the range is changed from auto to manual, and it’s range is held.

Then, the range is changed in every time by the switch operation. When the switch is pressed over

than 1 second, the range always returns to Auto-range is possible from any range statuses.

1push(>1sec)

Measurement Mode

Auto

Manual

Range up

Range Control

1push(<1sec) 1push(<1sec)

DCV

ACV

D C mA

A C mA

Resistance ( Ω )

Continuity ( )

R1 to R5

R1 to R5

R2 to R3

R2 to R3

R1 to R6

→HOLD

Ri→Ri+1

(R5→R1)

(R5→R1)

(R3→R2)

(R3→R2)

(R6→R1)

400mV to 4000V

400mV to 4000V

40mA to 400mA

40mA to 400mA

400Ω to 40MΩ

Diode ( )

ADP

FIXED

DCA

ACA

Frequency ( f )

Tacho ( rpm )

Capacitance ( C )

R1 to R5

R1 to R3

R1 to R6

→HOLD

Auto – range

Ri→Ri+1 (R6→R1)

100Hz to 999.9kHz

6000rpm to 600krpm

4nF to 400uF

( NOTE ) Frequency measurement and Tacho are always set to the auto-range.

Default

Range

4V

4V

40mA

40mA

400Ω

400Ω

4V

400mV

40A

40A

100Hz

6000rpm

4nF

Ranges of continuity test (

), diode check (

), ADP, DCA and ACA measurements are

always fixed to their default ranges.

Just after power-on operation or changing mode, their ranges are set to the default range.

In the ADP measurement, 3 units are displayed by setting of RC1 to RC3 terminals.

The R1 to R6 of above range control table are set a range corresponding to below table.

RANGE DCV

ACV

DCmA

ACmA

Ω

f

R1

400mV 400mA

–

–

∗400Ω

∗100Hz

R2

∗4V

∗4V

∗40mA

∗40mA

4kΩ

1000Hz

R3

40V

40V

400mA

400mA

40kΩ

10kHz

R4

400V

400V

–

–

400kΩ

100kHz

R5

4000V

4000V

–

–

4000kΩ 1000kHz

R6

–

–

–

–

40MΩ

–

( NOTE ) The " ∗ " mark means the default range.

rpm

∗6000

60000

600k

–

–

–

C

∗4nF

40nF

400nF

4uF

40uF

400uF

Changing to DC400mV range or AC400mV range is available by only manual operation. Auto-range operation

cannot change to these ranges.

When the auto-range is switched in DC400mV or AC400mV range, measurement is continued in the 400mV

range. When overflow occurs in 400mV of the auto-range, its range changes to 4V range automatically.

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