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47DT OPERATING MANUAL EM-9508-B Rev.7
24. 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.
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EVENT TRIGGER SIGNALS
All event trigger signals are negative logic (Table 1).
SIGNAL
FUNCTION
DESCRIPTION
TIMING
Used for various timing hold functions.
• 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.
S-TMR
Startup timer Measuring starts in the pre-
determined time after detecting the signal
turning ON.
No measuring for the preset startup timer period from the falling edge in all
modes (Table 2).
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.
• Holds data value at the falling edge of the signal in the normal mode.
(Refer to 31. RETAINING MEASUREMENT STATUS.)
• Holds the TIMING signal status at the falling edge of the signal in all
other modes (Table 3).
RESET
The MAX and MIN values and latching alarm
are reset when the signal is turned ON.
• Resets measurement in all modes (Table 4).
• Resets MAX/MIN values and latching alarm. (Refer to 32. RESETTING
MAX/MIN VALUES AND LATCHING ALARM .)
• When a burnout is detected while RESET signal is ON, the main display
shows “B.ERR,” however, the alarm and analog outputs are reset (do not
change).
ZERO
----
Not to be used
NOTE
The negative logic (ON at low signal) is as shown in the figure on the right.
Negative logic
OFF (Hi)
OFF (Hi)
ON (Lo)
