MM-370A Portable or Machine Mountable Weld Monitor

The machine mountable MM-370A monitor can measure current, voltage, force and displacement simultaneously. The 5″ color display provides precise graphical waveforms of each parameter. With the capability to overlay multiple waveforms on a single screen the monitor can also be used to understand and optimize as well as monitor the weld. The limits and I/O can be programmed for each parameters with various output conditions.

The MM-370A uses either the MA770 or the MA771 weld thru sensors:

Features and Benefits

  • Weld Through Sensor Measures weld current, voltage, time, force, and displacement at the tips
  • Set Limits for all Parameters so that you know if one
  • Easy to read 5″ Screen and simple Menu navigation
  • Comprehensive machine I/O
  • Intuitive Waveform graphic analysis of data
  • Built in Printer and available RS232/485 output


Sample MM-370A Screens

Drop Down Menu Navigation
Weld Force and Current Timing Graph

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

Setup Limits for Alarms
Overlay Multiple Weld Waveforms

Weld History Display


Miyachi MM-370A 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: Built-in printer and RS-232/RS-485 port
  • Number of Schedules: 127
  • Dimensions – H x W x D: 10.6″ x 6.8″ x 11.4″ (269mm x 172 mm x 290mm) Dimensions are excluding protrusions.
  • Weight: 11 lbs (5 kg)
  • AC Power Requirements: 100-240 VAC, 50/60 Hz, 0.7 Amps

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:
Displacement Sensor

Optional Accessories: Coils

This Item Replaces

  • MM-326B
  • MM-336A
  • MM-356A
  • You might also be interested in: