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Summary of Contents for Raytech Micro Junior 2
- Page 1 RAYTECH USA, Inc. 118 S. 2 Street Perkasie, PA 18944 USA Tel. 888 4 THE SPY Tel. 267 404 2676 Fax. 267 404 2685 10 Amp Digital Micro-Ohm Meter Model: Micro Junior 2 Instruction Manual Ver. 1.04...
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Page 2: Table Of Contents
RAYTECH USA, Inc. Table of Contents 0 – 1 Section Page Table of Contents 0 – 1 Safety Precautions 1 – 0 Uncrating Procedure 2 – 0 Introduction 3 – 0 Technical Specifications 4 – 0 Front Panel Description 5 – 0 Front Panel Descript. -
Page 3: Safety Precautions
BEFORE APPLYING POWER Read this manual carefully before operating the system. The Micro Junior 2 is battery operated. The battery pack is charged via an external power supply which can handle input voltage from 100 to 240 vac 50/60Hz (auto-sense). - Page 4 RAYTECH Toll free service & support telephone: 1 888 4 THE SPY (888 484 3779) 1. The Micro Junior 2 Fieldcase is a waterproof design that may incorporate a pressure relief valve. This valve should be slightly open when encountering atmospheric changes; i.e... Airplane Travel, High altitudes, etc...
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Page 5: Introduction
INTRODUCTION 3 – 0 Raytech Digital Micro ohm meter, Micro Junior 2 was designed for high degree of accuracy for the measurement of very low resistance. This technology was then packaged into a portable test system for use by apparatus manufacturers, rebuild shops, and electrical maintenance crews. -
Page 6: Technical Specifications
• Internal Panel Mount Printer • External connection Port & RS232 (serial) Interface • 5 Year standard warranty MICRO JUNIOR 2 OPTIONAL ITEMS: Part No - MJ 01 – Kelvin clip set Part No - MJ 02 – Custom clamping devices (user specified) Part No - MJ 04 –... -
Page 7: Front Panel Description
This port is used for an external connection to the 50A/50V Transformer Winding Resistance Power Supply Option: WR50-1A. This port can also be used with an optional temperature probe TP 02. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... -
Page 8: Front Panel Descript. Cont. 5 - 1
This panel mount printer allows the user to print out stored results or current results. The single button on the printer is for Form-Feed. To tear paper, pull paper towards the front of the instrument against the serrated cutting edge. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... -
Page 9: Range Selection
PRINTER 10A RANGE x 10A RANGE 10A RANGE PRETEST REVERSE TEST AUTO. TEST Further details of these menus and screens are located on the following pages. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... - Page 10 * If you do not wish to erase the stored results, position the pointer with the rotary knob to highlight “STOP” and press the rotary knob to cease this action. * Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent...
- Page 11 You are now able to adjust the Year, Month, Day, Hour, and Minute. Using the rotary knob, turn clockwise or counter-clockwise to change the highlighted number. Press the rotary knob to proceed to the next number. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent...
- Page 12 While “LCD” is highlighted, press the digipot. The following screen will appear: You are now able to adjust the contrast. Using the digipot, turn clockwise or counter-clockwise to adjust the brightness or darkness of the screen. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent...
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Page 13: Testing Screen Descriptions
For the descriptions of the various adjustments and options for testing, this manual will use the 10A and x10A Ranges as examples on the following pages. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... -
Page 14: Single Mode
“Print” : allows the user to go to the print screen. “Auto” : allows a test to be made then automatically saves it in memory. “Setup” allows the user to go to the Range Selection screen. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... -
Page 15: Auto Mode (Automatic)
The Timer feature is typically used with the transformer Winding Resistance option: WR50-1A. This feature allows the operator to record the time required to prepare a heated transformer winding (or any heated device) for cooling curve measurements. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... - Page 16 This mode operates identical to all other test Ranges. For explanation: see ”AUTO mode “page 15. Press stop with the rotary knob. The test will stop. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent...
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Page 17: Print Command
In this example the data was saved to memory location 63. Press “Setup” to go back to the Range Selection screen, Press “Print” to print test results, or Press “Mode” to access other testing modes. Raytech USA, Inc. All rights reserved. No portion may be reproduced without written consent... -
Page 18: System Details
• Built in timer for prolonged charging Charging Instructions 1. Connect the charger to the Micro Junior 2 before it is connected to the mains outlet. 2. When charging is complete, disconnect from the mains before removing Micro-Jr connections. Explanation of Charging Function The charger works in three different modes. -
Page 19: Limitations Of Testing
7 – 5 Low Resistance Testing: The Micro Junior 2 is an extremely useful device for checking Switch Contacts, SF6 Switchgear, Busbars, Splices, Joints, Fuses, Breaker contacts, Railbonds, and Low inductive windings. The Micro Jr. utilizes a 4 wire measuring technique. The Two (2) connections on the front plate marked &... -
Page 20: Getting Started Quickly
8 – 1 OPERATION: This section describes a typical, step by step, operation of the Micro Junior 2 Open the top protection lid of the case and attach the test leads to the test set. The Two (2) connections on the front plate make &... -
Page 21: Cross Current Measurements
8 – 2 Cross Current measurements (Forward / Reverse): The Micro Junior 2 was designed to allow measurements with the current flow in a forward direction and then in a reverse direction. The current flow through the device under test is reversed (or crossed) automatically during a testing sequence in Ranges x10 A and x1 A. -
Page 22: Troubleshooting
General 9 – 0 At powering on, the Micro Junior 2 internal calibration and check sequence is performed. Upon completion of the check sequence the test set will proceed to the “Range Selection“ Screen. Should there be any problem with the test set an error message will appear. -
Page 23: Warranty
Raytech USA, for system evaluation and upgrades. Failure to do so will void the additional extended warranty.
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