Two and Four Channel Tonnage Monitor

Picture of 2CH Tonnage Monitor

Select the Tonnage Alarming Method for your Application



Trend Tonnage Alarming

Invented by Helm over 25 years ago, tonnage monitor trend alarming allows you to establish the quality window that the process must operate within. Limits are selectable from 5% to 45%, in 5% increments. Once the forming process begins, the Trend alarms are automatically set above and below the sample benchmark value. Machine shutdown is activated if the forming force varies outside the tonnage monitoring range.

Adaptive Learn:

Adaptive Learn Alarming

Changes in material thickness, hardness or temper are quickly detected with this tonnage alarming method. Upper and lower limits are continuously adjusted during the production run based on the average tonnage developed over the last 100 machine strokes. Adaptive learn alarming is ideal for high speed forming operations and guarantees precision tonnage control.

Area Under the Curve:

Area Under the CurveUtilizing Helm signature analysis techniques, this alarming method continuously monitors the energy curve developed while each part is formed. If any area of the forming tonnage signature changes, machine stop is initiated. Area under the curve tonnage monitoring does not require a resolver or other external timing device. Applications include presses performing deep draw or stretch forming operations and machines using nitrogen die cylinders.


Applications & Features ↑Top↑


  • Punch Presses
  • Forging Machines
  • Transfer Presses
  • High Speed Stamping
  • Assembly Operations
  • Link Drive Presses
  • In-Die Force Monitoring
  • Thread Rolling



  • Two Channel, Strain Gage Input
  • 24 Volt DC or 110 Volt AC Power Input
  • Three selectable tonnage alarming methods:
    1. High-Low Trend
    2. Adaptive
    3.Area Under the Curve
  • Built-In Press Capacity Alarms
  • Ethernet Communication Cort -optional
  • Small Rugged Enclosure
  • Backed by Over 45 Years of Experience
Specifications ↑Top↑
  • Number of Channels – Two or Four
  • Power Requirements – 24 volts DC or 110 volt AC
  • Sensor Inputs – Two or Four Helm Strain Gage sensors
  • Operating Range – Single stroke to 1000 strokes per minute
  • Output Relays – Two independently wired relays for capacity and selected alarm functions. Each relay rated at 24 VDC, 1/2 Amp. 110 VAC system supplied with two 24-volt dry contact relays.
  • A to D Sample Rate – 100 microseconds
  • Display Resolution – Up to .1% full scale
  • Overall Accuracy – 1% full scale
  • Bracket Mount
  • Flange Mount
Networking Options ↑Top↑
  • Tonnage Values
  • Alarm History
  • Current and Stored Tonnage Signatures
  • SPC Charts
  • Mariner AD – for quick interface with laptops
  • Ethernet-Firstmate Module – for connecting to your plantwide network
  • Web-View Module – for browser based access on your LAN or the Internet
Ordering Information ↑Top↑
System Options 2 CH Model 4 CH Model
12V System w/ Mounting Bracket RLG-2 RLG-4
24V System w/ Flange Enclosure RLG-2FL RLG-4FL
110V System w/ Mounting Bracket RLG-2AC RLG-4AC


Sensor Kits 2 CH Model 4 CH Model
Drill/Tap Installation L2-DB L4-DB
Weld/Pad Installation l2-WB L4-WB