C-Face Hollow Flanged Reaction Torque Transducers
Model #CF2700V
Series CF2700V Torque Sensors provide static and dynamic torque feedback from a motor or its’ load. The device whose torque is being sensed must have a mounting meeting NEMA C-Face standards or a suitable adapter. They are strain gage based sensors and will measure torque whether the shaft is rotating or stationary. Characterized by high stiffness and very low deflection and they are bidirectional. Since they measure the reaction torque, the torque path should be through the sensor only.
Model Number | NEMA Motor Frame Size |
CF2756V | 56C, 143TC, 145TC |
CF2782V | 182TC, 184TC, 213TC, 215TC, 254TC, 256TC |
CF2784V | 284TC |
Simple, Low Cost Installation
The sensor fits between a C-Face motor and load. When the load shaft is female, use the optional coupling shaft. When the load shaft is male, use a conventional double-flex coupling. Nothing else is needed for mechanical installation.
CF2700V Torquemeters
The CF2700V Torquemeter outputs a zero to ±10 volt analog of torque. It uses a 5-wire connection; signal, signal common, remote cal, +power and power return. Power input is a single, unregulated, fused and reverse polarity protected dc supply. If needed, Himmelstein’s Series 700 Instruments provide power, engineering unit display, classify torque, capture max/mins, interface a PC and much more. Specify the Model 703 for a CF2700V.
Product Feature Summary
- Static and dynamic response for motor or load torque
- NIST traceable, NVLAP* accredited, dead weight calibration
- Full bidirectional operation
- No bearings or rotating parts
- Simple, low cost installation
- Robust strain gage sensor handles overloads of 5 times rated capacity
- Very high stiffness and very low torsional deflection
- 0 to ±10 Volt output
- DC to 1,000 Hertz bandwidth
- NIST* traceable calibration circuitry; remote on CF2700V
- Single, unregulated supply; fused with reverse polarity protection
- No slip rings, brushes, optical paths, or radio transmitters
- Long, maintenance-free life
- Compatible with plc and pc controllers, and data acquisition systems
- Standard models for NEMA 56C thru 286TC motor frames
General Specifications
| Standard Code N | Enhanced Code C | |
Nonlinearity (end point method, % of Range) | ≤±0.2 | ≤±0.1 |
Hysteresis (% of Range) | ≤±0.2 | ≤±0.1 |
Nonrepeatability (% of Range) | ≤±0.1 | ≤±0.05 |
Combined Error (Nonlinearity, hysteresis and nonrepeatability, % of Range) | ≤±0.25 | ≤±0.1 |
Typical Thrust Crosstalk1 (lbf-in) | ≤±2% of Thrust in lbs | ≤±1% of Thrust in lbs |
Typical Bending Crosstalk (lbf-in) | ≤±2% of Bending in lbf-in | ≤±1% of Bending in lbf-in |
Calibration Error (% of Range at 75 deg. F, NIST traceable) | ≤±0.1 | ≤±0.05 |
| Calibration Circuit Actuation | Remote, connect Cal line to Common. | |
Temperature Effect On Zero (% of Range per deg. F) | ≤±0.006 | ≤±0.002 |
Temperature Effect On Span (% of Reading per deg. F) | ≤±0.006 | ≤±0.002 |
Compensated Temperature Range | +75 to +175 deg. F (+23.9 to +79.4 deg. C) | |
Useable Temperature Range | -25 to +185 deg. F (-31.7 to +85 deg. C) | |
Storage Temperature Range | -65 to +200 deg. F (-53.9 to +93.3 deg. C) | |
Output Signal | 0 to ±10 Volts (Load Resistance => 10kohm Source Resistance < 1ohm) | |
Output Signal Polarity (for CCW torque through the torquemeter, polarity changes when torque is CW) | Positive | |
| Measurement Bandwidth3 | dc to 1000 Hertz | |
| Supply Voltage4 (fused and reverse polarity protected) | 15 to 26 Volts, dc, unregulated | |
| Supply Current4 | 80mA, max | |
| Power Supply Effect | < 0.01% of Range/Volt | |
| Zero Control and Span Control Ranges | Each are ±10% of Sensor Full Scale, nominal | |
| Connector Pinouts | A = +Power, B = Power Return, C = N/C, D = Signal Common, E = Signal, F = Remote Cal | |