MM-380A Portable Weld Checker

The hand-held MM-380 is designed to provide quick, precise and comprehensive measurements of the welding process. The MM-380 utilizes a weld through sensor measures current, voltage and force simultaneously between the electrodes. The 5” color display provides precise graphical displays of waveform time and amplitude, in addition to numeric peak and average values. Measurement setup, waveform analysis and menu navigation is very straightforward, and achieved using a rotary encoder. Waveforms and data can be output through an optional in printer or via COM port for screen capture and data collection.

The MM-380A uses either the MA770 or the MA771 weld thru sensors:

Features and Benefits

  • Measures weld current, voltage, time and force
  • Weld thru Sensor
  • Easy to read 5″ Screen and s Menu navigation
  • Intuitive Waveform graphic analysis of data
  • External Printer and RS232 output


Sample MM-380A Screens

Drop Down Menu Navigation
Weld Force and Current Timing Graph

Weld Current, Voltage, Resistance Graph
Zoom of Current and Voltage Graph

Weld History Display


Miyachi MM-380A Portable Weld Tester Specifications

  • Current Range: 0.010 to 200.0kA
  • Force Ranges (MM-370A-00-01 Only):

    • MA-770A-01: 55 to 1102 lbf (25 – 500 kgf)
    • MA-771A-01: 110 to 2204 lbf
    • MA-520: 1.10 to 22.04 lbf (0.50 to 10.00 kgf)
    • MA-521: 11.0 to 220.4 lbf
    • MA-522: 110 to 2204 lbf (50 to 1000 kgf)
  • Voltage Range: 0.30 to 20.0 Volts
  • Current Measurement Time:

    • AC Current: 0.5 to 600.0 cycles at 60 Hz, 1 to 2000 ms
    • DC Current: 0.5 to 120.0 cycles at 60 Hz, 1 to 2000 ms
  • Force Measurement Time: 1 to 6000 ms
  • Measurement Mode Voltage/Current: Arithmetic Mean RMS or Maximum (Peak)
  • Data Output: RS-232 and Optional External Printer
  • Number of Schedules: 127
  • Dimensions – H x W x D: 9.9″ x 5.5″ x 2.2″ (252mm x 140 mm x 56mm) Dimensions are excluding protrusions.
  • Weight: 2 lbs (0.9 kg)
  • AC Power Adapter Requirements: 100-240 VAC, 50/60 Hz
  • Weight: 1.1 lb (500g)
  • Dimensions: 6.7in x 2.9in x 1.2in (170mm x 75mm x 30mm)
  • Battery Operation Time: Approximately two hours with one battery or four hours with two batteries. 1 Battery Included standard with the unit.

For further information, please contact T. J. Snow. We will be glad to help you select the weld checker for your needs and budget.

Optional Accessories:
External Printer

Optional Accessories: Coils

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