Calibration Segment Arm – FAQ & User Guide

Quick Answer

A Mountz Calibration Segment Arm is used with a hanger and calibrated weights to apply a known torque load to a torque analyzer or torque sensor. The segment arm attaches to the input drive of the analyzer or sensor, while calibrated weights are suspended from the arm. Mountz offers segment arms in 10, 12, 24, and 48-inch lengths with different input drive sizes and maximum weight capacities.

What Is a Calibration Segment Arm Used For?

Calibration Segment Arms are engineered for calibrating torque analyzers and torque sensors.

Mountz identifies torque calibration equipment as a means of calibrating torque testers and sensors and supporting traceability to National or International Standards such as NIST and ISO.

How Does a Segment Arm Work?

A segment arm is used with calibrated weights to create a known torque load based on force and distance.

Torque = Force × Distance

For calibration, the segment arm attaches to the input drive of the torque analyzer or sensor. A hanger is suspended from the arm, and calibrated weights are added to create the required torque load.

The amount of weight required depends on the torque range of the analyzer or sensor and the length of the segment arm.

Dead Weight Calibration Setup

Mountz identifies three components of a dead weight test set:

Segment Arm or Calibration Wheel
Hanger
Weights

Weights are placed on the hanger, which is suspended from the Segment Arm. Mountz specifies that the total weight includes both the hanger and the weights.

Available Models

Model	Item #	Max Weight	Tolerance	Input Drive	Tool Length
S-10	061106	25 lbs.	±0.005	1/4" M/Sq.	10"
S-10	060094	75 lbs.	±0.005	3/8" M/Sq.	10"
S-10	060056	100 lbs.	±0.005	1/2" M/Sq.	10"
S-12	060052	75 lbs.	±0.006	3/8" M/Sq.	12"
S-12	060093	100 lbs.	±0.006	1/2" M/Sq.	12"
S-24	060091	125 lbs.	±0.012	1/2" M/Sq.	24"
S-24	060053	250 lbs.	±0.012	3/4" M/Sq.	24"
S-48	060090	125 lbs.	±0.024	3/4" M/Sq.	48"
S-48	060054	250 lbs.	±0.024	1" M/Sq.	48"

Selecting a Segment Arm

When selecting a Segment Arm, consider:

Torque range of the analyzer or sensor
Segment arm length
Maximum weight capacity
Input drive size
Required calibration load

Mountz states that the amount of weight required is determined by the maximum torque range of the analyzer or sensor being calibrated and the length of the Segment Arm.

Compatible Calibration Equipment

Calibration Hangers

A hanger is suspended from the Segment Arm and holds the weights used to create the calibration load.

Calibration Weights

Mountz offers calibrated weights for use with Segment Arms and Calibration Wheels. The hanger weight must be included when determining the total applied weight.