MM-400A
8. Operation Screens
8-10
• POWER
Shows the mean power over the measurement interval.
• RESISTANCE
Shows the mean resistance over the measurement interval.
• WELD TIME
Shows the time from the detection of a current trigger to when the current
flow is determined to be terminated.
• WELD TIME TP
Used when measuring the capacitor-type welding current. Shows the time
from when the welding current begins to flow to when it reaches the
maximum value.
• WELD TIME TH
Used when measuring the capacitor-type welding current. Shows the time
from the welding current exceeds the maximum value to when it falls to half
the maximum value.
(Note) In WELD TIME TP and WELD TIME TH, measurement is made when
the time setting is SHORT ms-DC. Also, make measurement with the setting
of SET PULSE for MODE and 00 for PULSE No.
• FLOW TIME
Applied for DC only. Shows the time from the detection of a current trigger to
when the current flows is decreased to the 10% level of the measured
welding current. Note that the meaning of 10% differs depending on the
CALCULATION setting in the BASIC SETUP (3) screen. (Refer to Note 2.)
ORIGINAL: 10% of welding current peak value
ISO17657: 10% of welding current RMS
• DIST INITIAL
*1
Available only when any of ABSOLUTE1 to ABSOLUTE4 is selected for the
measurement mode. Measures and shows the displacement before welding.
Select CURRENT START or EXTERNAL INPUT for the timing setting of
displacement measurement INITIAL MEASUREMENT in the EXTEND
SETUP (2) screen.
• DIST PULSE1
*1
Measures and shows the displacement after the end of WELD1. Select
CURRENT START or DELAY TIME for MEAS AFTER PULSE in the
EXTEND SETUP (2) screen. When DELAY TIME is selected, the
displacement between the end of WELD1 and the elapse of the delay time is
measured and shown. When CURRENT START is selected, the
displacement just before the start of current flow of WELD2 is measured and
shown.
• DIST PULSE2
*1
Measures and shows the displacement after the end of WELD2. Select
CURRENT START or DELAY TIME for MEAS AFTER PULSE in the
EXTEND SETUP (2) screen. When DELAY TIME is selected, the
displacement between the end of WELD2 and the elapse of the delay time is
measured and shown. When CURRENT START is selected, the
displacement just before the start of current flow of WELD3 is measured and
shown.
(Note) COOL is required between WELD1 and WELD2 for measurement.
• DIST FINAL
*1
Measures and shows the final displacement after the end of current flow
(between the final current flow and the end of final delay time).
• DIST REAL TIME
*1
The MM-400A constantly measures and displays the displacement while
MEAS is selected. The MM-400A stops measurement when PROG is
selected. Measurement is made at intervals of twice a second. If you wish to
select FORCE REAL TIME for measurement, select REAL TIME for
TRIGGER the BASIC SETUP (1) screen.
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