The Western Instruments Junior Tri-Gauge VM Pit & Welding Gauge, Range +/-3mm (0.100in) N88L-2 is todays most versatile Lever Pit Gauge, with its Metric and dual Imperial Scales. Additionally, the Junior Tri-Gauge serves as a basic Weld Inspection Gauge for Undercut Depth, Weld Crown Height, a Porosity (diameter) Comparator, and both Metric and Imperial Rules. The Junior Tri-Gauge Pit Gauge is fitted with a Patented pointer Offset Correction for improved accuracy and repeatability. Lever Pit Gauges are intended to evaluate corrosion, and not as an absolute measuring tool.
Mechanical Lever Pit Gauge with Metric and Imperial Scales
Reading the Scale: The operator simply lines up the appropriate Pointer with the desired Scale. Specification or Jurisdiction normally governs the selection of the Scale to use
Measuring Corrosion (Depth): Extend the Lever to the maximum depth, so the Scale is also reading a maximum measure. Place the Contact Point into the Pit (or area of corrosion), and gently bring the Scale Plate Base of the Junior Tri-Gauge firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Offset Correction: The Contact Point of the Junior Tri-Gauge has been specially formed to be in-line with the contact surface of the Scale Plate Base. This Offset Correction, ensures error is reduced if the Junior Tri-Gauge is not normal to the surface of the workpiece
Measuring Weld Reinforcement (Height): Place the Lever to a neutral depth, so the Scale is also reading Zero. Place the Contact Point onto the top of the Weld Reinforcement, and gently bring the Scale Plate Base, of the Junior Tri-Gauge, firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Measuring weld Undercut: Weld Undercut measurement is identical to Pit Depth Measurement by simply extending the Lever to the maximum depth, so the Scale is also reading a maximum measure. Place the Contact Point into the Undercut, and gently bring the Scale Plate Base of the Junior Tri-Gauge firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Zero Offset: It is important for the Operator to know if the Junior Tri-Gauge's Lever Arm and Contact Point are zeroed to the Scale. When the Contact Point is in contact with a flat surface, the Scale should read zero. However if there is an offset (positive or negative), the operator must be mindful to add or subtract the appropriate amount of error, thus keeping the measurement accurate
The Junior Tri-Gauge is supplied with a Pocket Protector type Case and Instructions
Product Features
Mechanical Lever Pit Gauge with Metric and Imperial Scales
Reading the Scale: The operator simply lines up the appropriate Pointer with the desired Scale. Specification or Jurisdiction normally governs the selection of the Scale to use
Measuring Corrosion (Depth): Extend the Lever to the maximum depth, so the Scale is also reading a maximum measure. Place the Contact Point into the Pit (or area of corrosion), and gently bring the Scale Plate Base of the Junior Tri-Gauge firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Offset Correction: The Contact Point of the Junior Tri-Gauge has been specially formed to be in-line with the contact surface of the Scale Plate Base. This Offset Correction, ensures error is reduced if the Junior Tri-Gauge is not normal to the surface of the workpiece
Measuring Weld Reinforcement (Height): Place the Lever to a neutral depth, so the Scale is also reading Zero. Place the Contact Point onto the top of the Weld Reinforcement, and gently bring the Scale Plate Base, of the Junior Tri-Gauge, firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Measuring weld Undercut: Weld Undercut measurement is identical to Pit Depth Measurement by simply extending the Lever to the maximum depth, so the Scale is also reading a maximum measure. Place the Contact Point into the Undercut, and gently bring the Scale Plate Base of the Junior Tri-Gauge firmly against the surface of the workpiece. The Scale Window will come to rest at the appropriate depth measurement
Zero Offset: It is important for the Operator to know if the Junior Tri-Gauge's Lever Arm and Contact Point are zeroed to the Scale. When the Contact Point is in contact with a flat surface, the Scale should read zero. However if there is an offset (positive or negative), the operator must be mindful to add or subtract the appropriate amount of error, thus keeping the measurement accurate
