16.2 External I/O
289
13
Chapter 16 External Control
16
External control signals can be applied to start and stop measurement, and to print and save data.
The factory-default settings are to [Start], [Stop], and [Print].
1. Connect the cables for the corresponding external input signals to START/
EXT.IN1
, STOP/EXT.IN2, PRINT/EXT.IN3, and GND terminals.
See: "16.1 Connecting External Control Terminals" ( p.288)
2. Move the cursor to the Press the SYSTEM key to open the Environment sheet,
and move the cursor to [START/EXT IN1], [STOP/EXT IN2], or [PRINT/EXT
IN3].
3. Select the operation performed by the instrument in response to external signal input.
4. Short circuit the terminal and GND, or input a HIGH level (3.0 to 5.0 V) or LOW
level (0 to 0.8 V) pulse wave or rectangular wave to the terminal.
Control with the LOW level of the input waveform.
16.2 External I/O
16.2.1 External Input (START/EXT.IN1) (STOP/EXT.IN2)
(PRINT/EXT.IN3)
Signal Input Procedure
Start Start measurement. (Is not affected by [START Action] ( p.257))
Stop
Stop measurement. (Operations after measurement, such as numerical calcula-
tions and automatic saving will be carried out)
Start/Stop
Start measurement on LOW level, and stop measurement on HIGH level.
Abort
Stop measurement immediately. (Operations after measurement, such as nu-
merical calculations and automatic saving will not be carried out)
Print
Same operation as PRINT key (Not valid during Selective Printing ( p.93))
Save
Save to the media specified for the SAVE key, according to the specified condi-
tions. (Not valid during Selective Saving (
p.74))
Pen Up/Down
A LOW level signals 'pen-down' operation and a HIGH level signals 'pen-up' op-
eration (for X-Y recording).
• For STOP operation, follow [STOP Action] ( p.257).
• External input is not available when the HELP screen or a dialog window is
being displayed.
Voltage range HIGH level: 3.0 to 5.0 V , LOW level: 0 to 0.8 V
Pulse width HIGH level: 20 ms or greater, LOW level: 30 ms or greater
Maximum input
voltage
-0.5 to 7 V
START/EXT.IN1
STOP/EXT.IN2
PRINT/EXT.IN3
470 Ω
GND
2200 pF
5 V
3.3 kΩ
HIGH
3.0 to 5.0 V
LOW
0 to 0.8 V
30 ms or greater
20 ms or
greater
5 V
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