1. 1. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Erichsen Wuppertal Hydraulic Force Gauges CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE
2. 2. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Aviation (aircraft load monitoring) Heavy industrial paper textile mills (paper / textile tension) Monitor drill / milling machine loads Field service tasks to verify presses Mining Steel mills Cable manufacturing Tractors / trailers (pulling load monitoring) Industries Using Hydraulic Force Gauges
3. 3. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Terminology - Erichsen Hydraulic Force Gauges Dynamometer: A dynamometer is a device for measuring force, torque or power. Hydraulic Force Transducer: A transducer is a device that converts one form of energy to another form of energy. Hydraulic Force Gauge: A hydraulic force gauge is a small measuring instrument used across all industries to measure the force during a push or pull test. Early hydraulic dynamometer with dead-weight torque measurement Image: Wikipedia
4. 4. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Hydraulic Theory The hydraulic force gauge uses the principles of hydraulic force transmission. The force applied to a piston is converted into hydraulic pressure which forces a curved flat tube (Bourdon Tube) to Un Bend moving the pointer to the measured force. Hydraulic force gauges are per design intended for static or near static applications. Static is where the force to be measured F" remains steady for at least 1 second. Continuous rapid changes in force can destroy the pressure gauge, but the gauge may be protected with a special throttle (Hydraulic Choke) against rapid increasing / decreasing loads. How the Hydraulic Force Gauge Works
5. 5. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Hydraulic Theory PistonManometer Connector ORing Cylinder Inside the Hydraulic Force Gauge
6. 6. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Hydraulic Theory Inside the Manometer LOW FORCE (Thinner tube walls, low pressure) HIGH FORCE (Thicker tube walls, high pressure) Image: Wonkeedonkeetools
7. 7. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Pressure = Force (Mass x Acceleration) Area Image: Lestoilesroses.net Hydraulic Theory Hydraulic Force Transmission Force (smaller) Small piston Distance moved Liquid that cannot be compressed Large piston Distance moved Force (greater)
8. 8. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE PISTON FORCE Hydraulic Transmission Principal Animation
9. 9. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE 329 338 332 343 Capacity Range (N/kN) Min - Max 250N - 630 kN 400N - 63kN 1kN - 1000kN 1kN - 2500kN Accuracy = 2% = 2% = 1.5% = 2% Manometer Size in MM 63 / 100 (400 & 630kN) 63 100 100 Maximum Pointer (63MM only) Integrated Flat Compression Swivel Ball Swivel Compression Tension (Through Hole MM) (24, 40, 68, 120) Base Diameter / Piston Diameter (MM) 75/34, 90/55, 145/113 70/58 65/40, 110/66, 175/103 85/70, 120/108, 190/172, 300/278 Threaded Mounting Holes 2 (180 Deg) 2 (180 Deg) 2 (180 Deg) 3 (120 Deg) Specifications Comparison Table
10. 10. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Compact design low profile and versatile Used for occasional spot checks, structure setting and field service work rather than continuous loading Compensation on surfaces that are not straight Standard with a max. reading pointer (63mm gauge) Load Range; 250N (56Lbs) to 630kN (140,000Lbs) Accuracy: = 2% of full scale Digital manometer option; Accuracy; 0.25% of FS, IP65, Batt>1000h High pressure hose and capillary tube options Features Erichsen Force Gauge 329
11. 11. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Compact design with alignment ball Used for occasional spot checks as well as integrated in a permanent installation Durable, robust construction suitable for rough operating conditions on machines and installations. Especially suited for large surfaces. Ball feature for easy alignment of your load Standard with a max. reading pointer Load Range; 400N (90Lbs) to 63kN (14,000Lbs) Accuracy: = 2% of Full Scale High pressure hose and capillary tube options Features Erichsen Force Gauge 338
12. 12. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Precise 100mm manometer Durable, robust construction suitable for rough operating conditions on permanent machines and installations Manometer with Zero Point adjustment Load Range; 1kN (220Lbs) to 1000kN = 1MN (220,000Lbs) Accuracy: = 1.5% of Full Scale High pressure hose and capillary tube options Features Erichsen Force Gauge 332
13. 13. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Designed for tension and compression applications Suitable for continuous load measurements of axial forces as; anchoring systems, bearing forces on lathes, boring machines, extrusion presses etc. Load Range; 1kN (220Lbs) to 2500kN = 2.5MN (560,000Lbs) Accuracy: = 2% of Full Scale Digital manometer option; Accuracy; 0.25% of FS, IP65, Batt>1000h High pressure hose and capillary tube options Features Erichsen Force Gauge 343
14. 14. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Standard A Version Optional B Version Treaded mounting holes are optional on the 343 model Optional Flexible or Capillary Tube (all models) Manometer Compression Piston Manometer Specifications Dimensions 343
15. 15. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Application Notes
16. 16. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE The Erichsen force gauges are made out of stainless steel and hermetically sealed into a closed circuit filled with hydraulic oil. Mechanical limits are integrated into the Erichsen force gauge to minimize overload conditions. These gauges should not exceed load capacities. Immune to ESD (Electro Static Discharge) and transient voltages unlike their electronic counterparts. Operate in harsh conditions where traditional load cells wont operate. A Hydraulic Choke may be ordered to minimize load fluctuations (Note; this will not protect from overload conditions). Optional version may be ordered with Semi Rigid Stainless Tubing or Flexible Capillary Tubing. This allows the manometer to be mounted remotely from the load source. For example; in hazardous environments, tight spaces or when the load application is remote from the user. Standard traceable certificate comes with every Erichsen force gauge.17025 optional certificate is available. An optional digital manometer is available on 329 and 343 models. Optional scales available for all Erichsen force gauges; kgf, or Lbf (N is standard). Features
17. 17. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE FAQs Do all the Erichsen hydraulic force gauges have maximum pointers? Only the gauges with the standard 63mm manometer have maximum pointers. What is the 6mm Extension Connection Tube? This is a straight semi-rigid tube to extend the manometer away the gauge base, available in 50, 100, 150, 200, 300mm lengths. What is the load rating speed? Not less than 1 second to reach Full Load Capacity. What precautions should I take if I need to monitor fluctuating loads? Assure that the loads measured fluctuate between 10 to 80% of full scale. Assure that nominal loads are reached in not less than 1 second. We recommend using the optional Hydraulic Choke.
18. 18. CLEAR VISION SOUND STRATEGIES SOLID PERFORMANCE Learn more about the Erichsen hydraulic force gauges on www.ametektest.com