NJU9214FG1 New Japan Radio Co., Ltd., NJU9214FG1 Datasheet - Page 5

• Manufacturer Part Number: NJU9214FG1
• Description: 4 3/4 DIGIT Single Chip Digital Multimeter LSI
• Manufacturer: New Japan Radio Co., Ltd.

(1) Measurement function
Each measurement functions shown below is available with the NJU9214.
A/D converter.
the external RMS/DC converter. This DC voltage is supplied into A/D converter.
Therefore 10M and peripheral circuits require some protection like shields and so on for stable display.
( 10M , 10k , 1k
0.4mA ( 4,000V
and the temperature of the reference resistor.
ranges because the value of resister as the attenuator is changed by the temperature.
(1-1)
FUNCTION DESCRIPTION
The divided voltages which are output from each resistance R1 to R5 shown in following table are supplied to
In the AC measurement, after the dividing voltage, these output voltages are converted to DC Voltages with
10M resistor for input terminal may be easy to be affected by noises.
The resistors for attenuating should be selected with a flat temperature characteristic. Especially, the resistors
After measuring at 400V, 4,000V ranges, sometimes the uncorrect value is shown on the display at 4V, 40V
1 400mV range ( AC / DC ) is selected in only manual range.
2 4mA-4000mA range has Auto / Manual – 2 range and Manual – 4 range mode, each mode
3 ADP is applied for °C, hfe and other measurement
Voltage ( DCV, ACV ) measurements
DC/AC Voltage
DC/AC Current
DC/AC Current
Resistance ( )
Frequency ( f )
Capacitance( C )
Tacho (rpm)
Diode (
Continuity(
A D P
needs its own application circuit.
MEASUREMENT
FUNCTION
10M
) for 400V, 4000V ranges should be selected carefully. For example, when 4,000V is input,
)
)
R1(400mV)
R2(4V)
R3(40V)
R4(400V)
R5(4000V)
) flow through 10M , and the resistor consumes power of 1.6W ( 4,000V
RANGE
400mV to 4000V
4mA to 4000mA
40A
400 to 40M
100Hz to 1000kHz
4nF to 400μF
6000rpm to 600Krpm
RANGE
DIVISION RATE
100k
10k
1M / 10M
1k
/ 10M
/ 10M
1
/ 10M
Auto : 4-range / Manual : 5-range
Auto Manual -2 range/ Manual -4 range
Fixed
Auto : 6 - range / Manual : 6 - range
Auto : 5 - range
Auto : 6 - range / Manual : 6 - range
Auto : 3 - range
Fixed
Fixed
Fixed
Auto/Manual
NJU9214
1
2
3
0.4mA )