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Introduction
Important Safety Information
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Think Safety | |
Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly.
Improper operation, lubrication, maintenance, or repair of this product can be dangerous and could result in injury or death.
Do not operate or perform any lubrication, maintenance, or repair on this product until you have read and understood the operation, lubrication, maintenance, and repair information.
Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.
The hazards are identified by the Safety Alert Symbol and followed by a Signal Word such as "DANGER","WARNING", or "CAUTION". The Safety Alert "WARNING" label is shown below.
A non-exhaustive list of operations that may cause product damage are identified by "NOTICE" labels on the product and in this publication.
Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are therefore, not all inclusive. If a tool, procedure, work method, or operating technique that is not recommended by Caterpillar is used, the operator must be sure that the procedures are safe. The operator must also be sure that the product will not be damaged or made unsafe by any unspecified procedures.
The information, specifications, and illustrations in this publication are based on information that was available at the time that the publication was written. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete and most current information before you start any job.
When replacement parts are required for this product, Caterpillar recommends using Cat replacement parts or parts with equivalent specifications including, but not limited to physical dimensions, type, strength, and material.
Literature Information
This manual contains safety information, operation instructions and maintenance information and should be stored with the tool group.
Some photographs or illustrations in this publication may show details that can be different from your service tool. Guards and covers might have been removed for illustrative purposes.
Continuing improvement and advancement of product design might have caused changes to your service tool, which are not included in this publication.
Whenever a question arises regarding your service tool or this publication, consult Dealer Service Tools (DST) for the latest available information.
Safety Section
The Safety Section lists basic safety precautions.
Read and understand the basic precautions listed in the Safety Section before operating or performing maintenance and repair on this service tool.
General Information Section
The General Information Section describes tooling functions and features. This section provides useful information on individual parts, additional tooling, and resources.
Operation Section
The Operation Section is a reference for the new operator and a refresher for the experienced operator.
Photographs and illustrations guide the operator through correct procedures for using the tool group.
Operating techniques outlined in this publication are basic. Skill and techniques develop as the operator gains knowledge of the service tool and tool capabilities.
Maintenance Section
The Maintenance Section is a guide to tool inspection, cleaning, storage, and tool disposal.
Safety Section
Safety Icon Nomenclature
Personal Protection/Important Information
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Personal Protection/Important Information | |
Hazard Avoidance
| Crushing Hazard (foot) |
| Crushing Hazard (hand) |
| Pinch Point |
General Information Section
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| NOTICE |
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This instrument has no user serviceable parts inside. All servicing must be done by qualified technicians only. |
Introduction
Purpose
This manual contains information necessary to familiarize the HVOF (High Velocity Oxygen Fuel) Spray Identification Tool Operator with operation and functions of the HVOF Identification Tool. The purpose of this manual is to provide the operator with a functional understanding of the operation of the HVOF Identification Tool.
Functional Description
The HVOF Identification Tool is designed to sort between HVOF and chromium coatings using eddy current principles. Operation is simple and straightforward with a minimum of controls.
The unit operates at a fixed frequency of approximately 130 kHz, which is ideal for this sorting application.
The general-purpose probe supplied with the tool is spring loaded for constant contact pressure. The "V" cut show enables the probe to be held perpendicular on curved surfaces.
Balance:
A single-turn potentiometer. This control is used to move the meter pointer to the desired position on the scale.
Sensitivity:
A single-turn potentiometer used to set the instrument's overall sensitivity. Maximum sensitivity is obtained with this control fully up.
Probe:
A BNC receptacle for connecting probes to the instrument.
Power:
This is the main power switch. It controls the application of battery power to the internal circuitry. Replace with a 9V battery, 1U-9534.
Specifications
| Instrument Dimensions | 8.9 cm (3.5 in) x 18 cm (7.1 in) x 4.8 cm (1.0 in) |
| Weight | Handheld unit: 0.0 kg (.8 lb.) Including carrying case: 1.0 kg (2.2 lb.) |
| Operating Frequency | 130 kHz fixed |
| Battery Requirements | 1U-9534 9V Alkaline |
| Battery Life | Approximately 4 hours |
| Readout | 6.4 cm (2.5 in) wide rectangular meter. |
| Operating Temperature | 0° to 120° F at 85% RH |
Basic Description
The HVOF Identification Tool is a portable, battery operated, fixed frequency eddy current instrument designed specifically to sort between HVOF and chromium coatings.
The general-purpose probe supplied with the instrument is designed to make the readings reliable and repeatable.
Performance Features
The HVOF Identification Tool offers state-of-the-art design in simplicity of operation and ease of use. Fully derated circuitry provides for reliability and long maintenance-free service. The instrument is housed in a high impact resistant ABS enclosure designed for continuous operation under most environmental conditions.
All controls needed for the normal use of the instrument are located on the front panel. These include the POWER switch, BALANCE, and SENSITIVITY controls. The PROBE connector is BNC, the most common in the industry today.
The battery compartment, located in the rear of the instrument, houses the 9 V alkaline battery which powers the unit.
Operation Instructions
General Operation
The HVOF Identification Tool utilizes the eddy current principle, wherein induced currents are affected by changes in test part characteristics and homogeneity. Variations in material conductivity, permeability, or physical characteristics cause impedance changes in the test probe attached to the bridge circuit. This impedance change causes the bridge to become unbalanced and the resultant amplified unbalanced voltage is indicated by a change in the position of the pointer on the front panel meter.
Tool Set-Up
- Connect the 396-9343 Probe to the tool Probe connector.
- Turn on the power switch.
- Set the BALANCE control at mid-range, and the SENSITIVITY control to the lowest setting (down).
- Place the probe on the surface of the supplied HVOF half ring (396-9344) and adjust the BALANCE control so that the meter pointer is in the red band of the scale.
- Lift the probe off the HVOF half ring, and the meter goes off scale to the right of the red band. Now place the probe back onto the HVOF half ring and verify that the meter needle returns to the red band as in the previous step. This step verifies readings on HVOF. The probe can now be placed on an unknown material. If the test material is chromium, the meter needle will deflect to the far left side of the scale. If the material is HVOF material, the meter needle will deflect to the far right (red band) side of the scale.
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Probe on surface of HVOF | |
Test Block
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Probe 396-9343 | |
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Test Block | |
An HVOF plated half ring is provided with the instrument. This ring is provided as a means that whereby occasional checks may be made on instrument sensitivity, probe condition, etc.
Maintenance
General
The HVOF Identification Tool is built and designed to give long reliable service, however as with all electronic equipment, care should be taken that the instrument is not subject to shock from rough handling which may cause mechanical damage. The probe that is designed for use with the HVOF Identification Tool will provide a reasonable service life. After extended use, wear on the device will become apparent and replacement may eventually become necessary. Probe failure will generally be caused by an open-circuit coil, indicated by the panel meter needle pinned below the chrome mark, or a shorted coil, indicated by the meter needle pinned beyond the HVOF mark.
Technical Service
This instrument has been aligned and calibrated by skilled electronic technicians using unique calibration standards. Proper circuit linearization cannot be accomplished without these standards. It is recommended that all servicing be done by an experienced technician.
Additional Contact Information
For additional product support questions concerning this tool, contact the Dealer Service Tools Hotline at:
USA: 800-542-8665, Option 1
International: 1-309-578-7372
E-mail: dealerservicetool_hotline@cat.com
Note: Continuing improvement and advancement of product design can mean some photographs or illustrations in this publication will show details that are different from your service tool.