Related Manuals for Raytech Micro Junior 2
Summary of Contents for Raytech Micro Junior 2
- Page 1 INSTRUCTION MANUAL ENGLISH Micro Junior 2 MICRO JUNIOR 2 RAYTECH AG , OBEREBENESTRASSE 11, CH-5620 BREMGARTEN, SWITZERLAND...
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Page 2: Table Of Contents
8.1 Battery check........................15 8.2 Li-Ion Charger........................15 8.2.1 Precautions......................15 8.2.2 Features........................15 8.2.3 Charging Instructions....................16 8.2.4 Explanation of Charging Function................16 8.3 Limitations of Resistance Testing..................17 8.4 Transformer windings......................17 8.5 Low Resistance Testing.....................17 Page 2 of 44 90081-2.11 Micro Junior 2... - Page 3 12.3 X10A / x1A (Forward / Reverse test)................35 12.3.1 Single........................35 12.3.2 Auto........................36 12.4 Print..........................36 12.5 Store..........................37 13 Measurement Parameters Appendix....................40 A Troubleshooting B System Upgrades C Contacts D Index Page 3 of 44 90081-2.11 Micro Junior 2...
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Page 4: Warranty Conditions
1 Warranty Conditions Raytech AG Switzerland shall at their option and expense, repair or replace any part or parts that prove to be defective within the warranty limitation period- irrespective of the operating time of the test equipment provided that the cause of the defect occurred prior to the time at which the risk was passed. -
Page 5: Arbitration
Exclusive remedies provided herein are the customer’s sole and exclusive remedies. Raytech Switzerland shall not be liable for any damages resulting from the use of this equipment whether direct, indirect, special, incidental, or consequential damages, or whether based on contract, tort, or any other legal theory. -
Page 6: Safety Precautions
Failure to comply with these precautions and other specific warnings violates the safety standards of design, manufacture, and intended use. Raytech assumes no liability for the operation and use of this equipment. -
Page 7: Before Applying Power
Read this manual carefully before operating the system. The Micro Junior 2 is line operated. It operates within a wide range of power input from 100Vac to 250Vac and The system is designed to be used with either 50Hz or 60Hz Do not vary the input power source voltage level when a variable AC power source is connected. -
Page 8: Unpacking
Test Lead Power Current 2x3m Test Lead Potential 2x3m Cable Bag Power Cord, Charger User Manual If any of the above items are missing or damaged, contact your local representative or Raytech AG Switzerland immediately. 3.1 Optional Items Temperature Probe Kelvin Probe Set (MJO-201) -
Page 9: Technical Specifactions
4 Technical Specifactions The Micro Junior 2 is specially designed for fast and easy field measurement with the well known high precision and quality of Raytech. Type Micro Junior 2 Size L: 410 mm (16.1”) W: 337 mm (13.3”) H: 178 mm (7”) Weight 6.3 kg (13.88 lbs.) -
Page 10: Quick Start Guide
5.1 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 marked &... -
Page 11: Single
The instrument will halt the measuring process if excessive interference is detected. If a warning message,”Rx Too High” is displayed, Or if ”+++.+” is displayed, Then return to the “SET UP” screen and select the next higher resistance range. Page 11 of 44 90081-2.11 Micro Junior 2... -
Page 12: Cross Current Measurements (Forward / Reverse)
5.5 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 13: Introduction
10 A without frequent recharging 6.4 Operation The Micro Junior 2 applies a preset current level, selected by the user. The results of the test are displayed within a few seconds automatically. The results are reported on the easy to read liquid crystal display. -
Page 14: Advantages & Features
Runs for more than 5 hours continuous at 10 A – Complete automatic calibration system – Heavy duty protection circuitry – Internal Panel Mount Printer – External connection Port & RS232 (serial) Interface – 2 Year standard warranty Page 14 of 44 90081-2.11 Micro Junior 2... -
Page 15: System Details
The Battery indicator will give a good indication of the battery charge. A full Charge will allow the Micro Junior 2 to operate continuously for 5 Hours at 10- ampere output or (typically) a month of daily usage. Recharge the batteries at any time. The system can be operated while charger is plugged into the mains power (100 to 250 VAC 50 / 60 Hz, automatic ranging). -
Page 16: Charging Instructions
8.2.3 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 connections. 8.2.4 Explanation of Charging Function The External Charger works in three different modes. An LED-indicator with three different colors shows the mode that the charger is in. -
Page 17: Limitations Of 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 Junior 2 utilizes a 4 wire measuring technique. The Two connections on the front plate marked &... -
Page 18: Front Panel Description
Turning the switch to the “OFF” position turns off the instrument. The switch defaults to the “Automatic off” position and will automatically turn off after being idle for a certain period. Page 18 of 44 90081-2.11 Micro Junior 2... - Page 19 Connect the earth cable here. External This port is used for an external connection to the 50A/50V Transformer Winding Resistance Power Supply Option: WR50- This port can also be used with an optional temperature probe. Page 19 of 44 90081-2.11 Micro Junior 2...
- Page 20 + I : Positive Current Connection + P : Positive Potential Connection - P : Negative Potential Connection - I : Negative Current Connection Interface Serial RS232 Computer and External Printer Connection. Page 20 of 44 90081-2.11 Micro Junior 2...
- Page 21 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. Page 21 of 44 90081-2.11 Micro Junior 2...
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Page 22: Typical Display Screens
Setup Interval Test Setup Contrast Setup Printer 10A Range Test X 10A Range Reverse Test 10A Range Auto Test Further details of these menus and screens are located on the following pages. Page 22 of 44 90081-2.11 Micro Junior 2... -
Page 23: Operation Menu
See chapter 5 Quick Start Guide on page 10 10.1 Menu Structure Micro Junior 2 menu structured as shown in the figure below. Page 23 of 44 90081-2.11 Micro Junior 2... -
Page 24: Main Menu
Move the rotary knob to scroll through stored tests. If you want to print a measurement, you must select it in this menu item. Now Press the rotary knob and you get to the previous menu. Page 24 of 44 90081-2.11 Micro Junior 2... -
Page 25: Print
“Setup”.Press the rotary knob. This screen will appear. • Firmware (FW) • Serial Number (SN) • Flash Boot Loader (FBL) • More: "Temperature Correction" and"Length Correction" Page 25 of 44 90081-2.11 Micro Junior 2... -
Page 26: Clock
You are now able to adjust the Number of Tests. Use the rotary knob. Once the desired number is reached, press the rotary knob to select “OK”. The minimum number of tests are 2, maximum of tests 2000. Page 26 of 44 90081-2.11 Micro Junior 2... -
Page 27: Contrast
9 Pin RS 232 connector. Use the rotary knob, turn clockwise or counter-clockwise to select the desired port. By pressing the rotary knob, the setting is confirmed and you get back to the previous menu. Page 27 of 44 90081-2.11 Micro Junior 2... -
Page 28: Temperature Correction
11.3.5 Temperature Correction Temp: The Micro Junior 2 can, fully automatic, correct the measured values regarding the temperature. To activate temperature correction, press the rotary knob while “Temp” is highlighted. This screen will appear. Use the rotary knob, turn clockwise or counter-clockwise to select the desired Material. - Page 29 To deactivate the temperature correction go to the Temp Menu. Use the rotary knob, turn clockwise or counter-clockwise to select NoCorr. By pressing the rotary knob, the setting is confirmed. Page 29 of 44 90081-2.11 Micro Junior 2...
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Page 30: Length Correction (Specific Resistance)
11.3.6 Length Correction (specific Resistance) /m:The Micro Junior 2 can, fully automatic, correct the measured values regarding the length. To activate length correction, press the rotary knob while “/m” is highlighted. This screen will appear. Use the rotary knob, turn clockwise or counter-clockwise to select the desired Unit. -
Page 31: Testing Screen Description
12 Testing Screen Description 12.1 Range Selection When the Micro Junior 2 is first powered on the following "Range Selection" screen will appear. Test selections are initially made by turning the rotary knob to the desired selection of current or resistance range then pressing the rotary knob to begin that sequence. -
Page 32: Testing
In the continuous test mode, the test set will measure until the user selects and presses “Stop”. The test system has an output of current that runs continuously while the resistance measurements are being taken. Page 32 of 44 90081-2.11 Micro Junior 2... -
Page 33: Auto
The system prompts the operator to “Make Contact ” to the device under test. The system automatically detects when the contact is made to the device under test and begins the measurement sequence. Page 33 of 44 90081-2.11 Micro Junior 2... -
Page 34: Inter
The "Timer" feature is typically used with the transformer Winding Resistance option: WR50-A1. This feature allows the operator to record the time required to prepare a heated transformer winding (or any heated device) for cooling curve measurements. Page 34 of 44 90081-2.11 Micro Junior 2... -
Page 35: X10A / X1A (Forward / Reverse Test)
“Store” : allows to save a reading into a memory location (Archive). • “Print” : allows to go to the print screen. • “Mode”: Select another test mode. • “Setup” : allows to go to the Range Selection screen. Page 35 of 44 90081-2.11 Micro Junior 2... -
Page 36: Auto
“Print” is selected: • “Header” allows to Print a Header. • “Data” allows to Print the data. • “FF” allows to Form Feed the paper. • “Stop” returns to the Test screen. Page 36 of 44 90081-2.11 Micro Junior 2... -
Page 37: Store
This screen will appear. In this example the data was saved to memory location 12. Press “Print” to print test results. Press “Mode” to access other testing modes. Press “Setup” to go back to the Range Selection screen Page 37 of 44 90081-2.11 Micro Junior 2... -
Page 38: Measurement Parameters
0.1% Rdg 0.1 5 Digits or 1 mA 4 Digits k ... 400 k 1% Rdg F/R = automatic Forward / Reverse current measurement Resistance Range 0.0 to 400k Page 38 of 44 90081-2.11 Micro Junior 2... - Page 39 Appendix Micro Junior 2 MICRO JUNIOR 2 Page 39 of 44 90081-&90998-1.00 Raytech Vorlage Manual.ott2.11 Micro Junior 2...
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Page 40: Appendix
A.5 The display Blacklight goes out frequently...............41 A.6 The test set Turns off more frequently................42 A.7 The test set displays +++.+ but current is flowing.............42 A.8 Erratic or erroneous readings...................42 B System Upgrades C Contacts D Index Page 40 of 44 90081-2.11 Micro Junior 2... -
Page 41: A Troubleshooting
A Troubleshooting 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 42 If problems or questions do arise please contact your nearest Dealer or our service support group in the Switzerland under www.Raytech.ch The Micro Junior 2 is designed to be trouble free. If problems or questions do arise please contact our service support group. Page 42 of 44...
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Page 43: B System Upgrades
System firmware upgrades are available at no charge from the web site www.raytech.ch. This firmware is downloaded to a Windows based computer and then can be used to upgrade the Flash EPROM in the Micro Junior 2 via the RS232 link. For further details or assistance please contact our support group. -
Page 44: C Contacts
5620 Bremgarten 5620 Bremgarten Phone:+41 56 648 6010 Phone:+41 56 648 6010 Fax: +41 56 648 6011 Fax: +41 56 648 6011 Mail: welcome@raytech.ch Mail: welcome@raytech.ch Web: www.raytech.ch Web: www.raytech.ch Release Date: 2019-04 Page 44 of 44 90081-2.11 Micro Junior 2...