NJU9214 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJU9214 Datasheet PDF : 28 Pages
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NJU9214
About 10ms pulse width signal shown in below table is outputted from RD1 to RD4. This pulse controls the
Latching Relay Driving.
FUNCTION · RANGE
Relay
RD1
RD2
RD3
RD4
Ω, , , CAP
SW1
DCmA, ACmA
SW2
DC400mV, ADP
SW3
AC400mV
Set
SW4
Set
Ω,
SW5
ACA
SW6
ACmA, ACA, ACV, FRQ, rpm
SW7
Ω, , , CAP
SW1
DCmA, ACmA
SW2
DC400mA, ADP
SW3
AC400mV
Reset
SW4
Reset
Ω,
SW5
ACA
SW6
ACmA, ACA, ACV, FRQ, rpm
SW7
( 4 ) Attached functions ( Functions with KI1 to KI5 are available by only lock type switches. )
(4-1) Data Hold : HOLD
The hold or release of all display data is performed alternately by KI1 terminal input.
However, A/D conversion is operating even though in the HOLD status, therefore the buzzer sounds at the
over-range and the continuity test.
In the auto-range operation, changing of range is available.
(4-2) Relative Measurement : REL
The relative measurement is selected when the switch connecting to KI2 terminal is pressed. In this mode,
the value of difference between the present and the just before value is displayed.
In case of the auto-range, the range is held at the just before range.
However, the bargraph displays the absolute value, not the relative value.
And the over-range also occurs from the absolute value of input. When the KI2 is pressed over than 1 second,
the relative mode is released.
(4-3) Min. / Max. Hold : MIN / MAX
When the switch connecting to terminal KI3 is pressed, the mode is circulated as follows ;
MIN Value Hold → MAX Value Hold → HOLD Release
The bargraph always displays the input value.
(4-4) Data Memory : MEN
When the switch connecting to terminal KI4 is pressed, all of display data is stored into the memory.
The stored data can be read out and displayed on LCD by pressing the READ key connecting to terminal KI5,
and [MEM] mark blinks during this mode.
This mode is released by pressing the READ key connecting to terminal KI5.
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