36
Digital I/O: FAIL Out (Pin 6) and LOW Limit FAIL Out (Pin 8) are
activated.
Pass
If the 2
nd
display shows Pass, the
result is staying between the High
and the Low limit.
Digital I/O: PASS Out (Pin 5) is activated.
Deactivate Compare
measurement
To cancel the Compare measurement, press the Shift
key followed by the HOLD (Comp) key, or simply
activate another measurement.
6-3. Application: External trigger
Background
The DL-2052 uses the internal trigger by default, for example to count the
frequency and the period. Using an external trigger allows customized triggering
condition.
Signal connection
Connect the external trigger signal to the Digital I/O port located on the rear panel.
1 2 3 4 5
6 7 8 9
FAIL Out
HIGH Limit FAIL Out
LOW Limit FAIL Out
EOM Out
VCC Out
NC
Digital (Chassis) Ground
External Trigger In
PASS Out
Pin4
External Trigger Input pin.
TTL level, Active High, Pulse width > 25us
1. Activate external
trigger
Press the Shift key followed by the TRIG key. The
EXT indicator appears on the display.
2. Start trigger
Press the TRIG key to start triggering manually. The
indicator turns On.
Reading indicator
The reading indicator
stays On before triggering. After triggering, the indicator
flashes according to the external signal trigger timing.
Exit external trigger
Press the Shift key followed by the TRIG key. The
EXT indicator disappears and the trigger goes back to
internal mode.
