LS Series Tonnage Monitor

LS Series signature based tonnage monitor

LS Series Signature Based Tonnage Monitor

The PressWatch LS (Load Signature) Series is one of the most advanced and complete production monitors on the market today. The LS Series provides tonnage and signature features that help ensure press, die and part protection.

The operator interface is a computer screen that provides color signatures to be displayed right at the press. Enveloping and Critical Curve monitoring (CCM) are part of the standard signature software.

We also provide a solution if you are interested in combining die protection and programmable limit switches (PLS) with your LS Series tonnage monitor.


SlimWare Tonnage Screen

Tonnage Alarm

SlimWare Tonnage Screen Alarmed


SlimWare Siganture Screen


SlimWare Setpoints Screen


  Standard Option
Two or four channel display, plus total  
Six or eight channel display, plus total  
Independent left/right, high/low limits  
Signatures for each press corner & total  
Critical Curve monitoring (CCM)  
Signature enveloping  
Five signature zones for enveloping  
Percent of benchmark setpoints  
Percent of capacity setpoints  
Shows reverse load or snap-through  
Stroke, part, good part & batch
Can view count left in batch  
Low alarms may be disabled  
Automatic Zero Balance  
Shows die/job summary information  
Target tonnage die storage, up to 200
Three password levels  
Shows strokes per minute  
Can bypass an individual corner  
Flash card for memory & data transfer  
Two or four sensor inputs  
Analog output jacks  
RS-485/232 serial port  
Door Lock  
Counterbalance control  
Shut-height indicator  


No. Of Channels Two or Four
Sensor Inputs Full bridge strain gauge sensors
120 to 1000 ohms
Up to (8) 350 ohm sensors
Sensor Excitation Built-in 10VDC @ 500mA max (Short circuit protected)
Balance Range +/- 1mV/V of offset
Gain Range 100 to 11,000x (digitally controlled)
Analog Output 1.25VDC at 2.5VDC Press Capacity
Accuracy +/- 1% of full scale max
Non-linearity +/- .1% of full scale max
Flat DC to 1KHz
Display 4 digit display
Resolution 1024 count
SPM 400 SPM resolver
Trigger Resolver
Thershold Probe N/A
Resolver Interface Yes, 5000Hz rotor resolver
Shutdown Relay 10A @ 250VAC & 30VDC
N.O. and N.C. Contacts
Power Req. 70 Watts max, 85-132VAC @ 50-60Hz OR
170-264VAC @ 50-60Hz

  Width Height Depth
Dimensions 12.5 " 14.5 " 6.8 "


Name Format Link
User Manual PDF


Type Name Description Link
Standard Product PM Kit PM Kit includes strain gauge
  sensors, cables and mounting
Standard Product Resolver Precise crank-angle position
Standard Product PressNet Networking software that
  provides detailed production
  and tonnage information
Standard Product TT-Graph Signature analysis program that
  generates tonnage signatures
  and provides a simple approach
  for analyzing the signatures
Service Installation On-site product installation


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