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Available Options
  • Enhanced Performance - Code C
  • Optical Speed Pickup - Code O
  • Magnetic Speed Pickup - Code Z

Dual Range Bearingless Digital Torque Transducers

Model # 88700V Series

High Capacity Dual Range Digital Torque Transducers will accurately measure low running and high load torque without the cost and inconvenience of swapping two or more conventional torque sensors.  Available high ranges from 300,000 to 4,000,000 lbf-in (33.9 to 452 kNm) and low ranges from 60,000 to 800,000 lbf-in (6.78 to 90.4 kNm).  They are offered in two performance grades, standard ±0.1%, and enhanced ±0.05% combined non-linearity  and hysteresis of each range full scale. 

Important applications include measuring torque when the ratio of peak torque to average torque is high. In this situation, a conventional torquemeter must be oversized to avoid damage – a process which greatly reduces accuracy. Conditions that create high peak to average ratios include starting, stopping or reversing inertial loads, torsional oscillations, and diesel and single cylinder engine/compressor drives. Additionally, when peak torques are unknown, an MCRT® 88700V reduces the risk of damage from unexpected or accidental torque spikes.

These Dual Range Torquemeters have high accuracy in real-world applications, not just in the cal lab. They have the industry’s highest Overrange ratings, which avoids clipping real-world torque peaks and driveline torsionsals. Without sufficient Overrange, clipped torques will produce large measurement errors.

Each range is calibrated CW and CCW in our accredited laboratory and documented by a NVLAP approved calibration certificate certifying NIST traceability and documenting our laboratory operation and our quality management system meets ISO/IEC 17025-2005. A bi-directional rotor shunt calibration verifies the entire CW and CCW data chains. It may be invoked from switches, I/O lines or your computer.

General Specifications

  Standard Code N Performance Enhanced Code C Performance
  High Range Low Range High Range Low Range

Combined Nonlinearity and Hysteresis (end point method, % of Range)

≤±0.10

≤±0.05

Nonrepeatability(% of Range)

≤±0.05 ≤±0.07

≤±0.020

≤±0.05

Temperature Effects:

   

Zero (% of Range/deg. F.)

≤±0.001 ≤±0.005

≤±0.0006

≤±0.003

Span (% of Rdg./deg. F.)

≤±0.002

≤±0.001

Compensated Range

+75 to +175 deg. F.

Minimum Usable Range

-25 to +185 deg. F

Storage Range -65 to +225 deg. F.

Rotor to Stator Maximum Misalignment (inches)

Axial: ±04, Radial: 0.3, with or without Code O Optical Pickup If Code Z magnetic pickup is used, radial alignment must be held within ±0.020 and axial alignment within ±0.040.

Analog Torque Output:

 

 

Clockwise (CW)

+10.000 volts or +5.000 volts, user selectable

Counterclockwise (CCW)

-10.000 voltsor -5.000 volts, user selectable

Minimum Load

≥10 kΩ Resistive, ≤0.05 μF capacitive
Frequency Modulated Output

10±5 kHz, 20±10 kHz or 40±20 kHz; software changeable

Constant Delay Signal Filters Field selectable from 1 to 1,000 Hz in ten 1-2-5 steps plus 3 kHz using furnished software
Overrange³

≥ 150% of High Range and &ge% 300% of Low Range except Analog Output is linited to ±15V.

System Response Torque is sampled at 21 kHz. Analog output bandwidth is 3 kHz, reducible by filtering.
System Resolution High Range: ≥0.01% on all outputs. Internal data resolution is 24bits. Low Range: ≥0.025% of range (≥0.005% of High Range) on all outputs.
Supply Voltage5 (Volts dc) 10 to 26 at 6 Watts