Setting Event Trigger Input - M-system 47DAC Operating Manual

21. SETTING EVENT TRIGGER INPUT

External TIMING signals enable synchronous measurement, measurement of the MAX and MIN values and their deviation.
The timing to start or finish the measurement can be adjusted with the TIMING signals. This section describes event trig-
ger signals, modes and ON/OFF timing delay.
■ EVENT TRIGGER SIGNALS
All event trigger signals are negative logic (Table 1).
SIGNAL FUNCTION
TIMING Used for various timing hold functions.
S-TMR Startup timer Measuring starts in the pre-
determined time after detecting the signal
turning ON.
HOLD Reading measured signal stops and the last
measured value, MAX and MIN values and
output status are held when the signal is
turned ON.
RESET The MAX and MIN values and latching alarm
are reset when the signal is turned ON.
ZERO Forced Zero and Tare Adjustment are exter-
nally controlled when the signal is turned ON/
OFF.
NOTE
The negative logic (ON at low signal) is as shown in the figure on the right.
DESCRIPTION
• Invalid in the normal mode.
• Holds the measured value at the falling edge of the signal in the sam-
pling hold mode.
• Measures while the signal is ON and establishes the measured value at
the rising edge in the peak hold, valley (bottom) hold and peak-to-peak
hold modes.
No measuring for the preset startup timer period from the falling edge in all
modes (Table 2).
• Holds data value at the falling edge of the signal in the normal mode.
(Refer to 29. RETAINING MEASUREMENT STATUS.)
• Holds the TIMING signal status at the falling edge of the signal in all
other modes (Table 3).
• Resets measurement in all modes (Table 4).
• Resets MAX/MIN values and latching alarm. (Refer to 30. RESETTING
MAX/MIN VALUES AND LATCHING ALARM .)
Enables Forced Zero and Tare Adjustment in all modes, similar to the front
button control. (Refer to 26. FORCING THE PRESENT DISPLAY VALUE
TO ZERO.)
The forced zero lockout setting is disregarded.
47DAC OPERATING MANUAL EM-9518-B Rev.4
Negative logic
OFF (Hi)
ON (Lo)
OFF (Hi)
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