Subscribe to Our Youtube Channel
Related Manuals for AEMC instruments 6255
Summary of Contents for AEMC instruments 6255
- Page 1 User Manual ENGLISH Micro-Ohmmeter Model 6255 MICRO-OHMMETERS 1.800.561.8187 information@itm.com www. .com...
- Page 2 Copyright Chauvin Arnoux , Inc. d.b.a. AEMC Instruments. All rights reserved. © ® ® No part of this documentation may be reproduced in any form or by any means (including electronic storage and retrieval or translation into any other language) without prior agreement and written consent from Chauvin Arnoux , Inc., as governed by United States and International copyright laws.
-
Page 3: Statement Of Compliance
For recalibration, please use our calibration services. Refer to our repair and calibration section at www.aemc.com/calibration. Serial #: Catalog #: 2129.84 Model #: 6255 Please fill in the appropriate date as indicated: Date Received: Date Calibration Due: Chauvin Arnoux , Inc. ®... -
Page 4: Table Of Contents
TABLE OF CONTENTS 1. INTRODUCTION...............7 1.1 INTERNATIONAL ELECTRICAL SYMBOLS ......... 7 1.2 DEFINITION OF MEASUREMENT CATEGORIES (CAT) ... 7 1.3 PRECAUTIONS FOR USE ............8 1.4 BATTERY HANDLING ..............8 1.5 RECEIVING YOUR SHIPMENT ............. 9 1.6 ORDERING INFORMATION ............9 1.6.1 Accessories .................. - Page 5 4.2.9 Selecting the Metal Type (nEtA) ..........24 4.2.10 Programming the Alpha Value (ALPH) ........24 4.2.11 Selecting Temperature Units (dEg) ..........24 4.2.12 Setting Alarm Set Point, Direction and Buzzer Level (ALAr) .... 25 4.2.13 Setting the Display Timeout (LlgH) ..........25 4.2.14 Clearing the Memory (nEn) ............
- Page 6 8. APPLICATION EXAMPLES ..........45 8.1 MEASURING WINDING RESISTANCE OF MOTORS AND TRANSFORMERS ................45 8.2 MEASURING RESISTANCE ON ELECTRIC MOTORS .... 45 8.3 BATTERY STRAP MEASUREMENTS ........46 9. MAINTENANCE ..............47 9.1 WARNING ..................47 9.2 CLEANING ..................47 9.3 CHARGING THE BATTERY ............47 9.4 BATTERY AND FUSE REPLACEMENT ........
-
Page 7: Introduction
Example: hardwired equipment in fixed installation and circuit breakers. CAT II: Corresponds to measurements performed on circuits directly connected to the electrical distribution system. Example: measurements on household appliances and portable tools. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 8: Precautions For Use
NOTE: The instrument cannot be used while the battery is charging. NOTE: At least 5 charge/discharge cycles will be necessary for your battery to recover 95 % of its capacity. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 9: Receiving Your Shipment
1.6 ORDERING INFORMATION Micro-Ohmmeter Model 6255 ............Cat. #2129.84 Includes extra-large tool bag, set of two 10 ft (3 m) Kelvin clips (10 A - Hippo), set of two 10 ft (3 m) Kelvin Probes (1 A - Spring Loaded), RS-232 DB9 F/F... -
Page 10: Replacement Parts
Extra-large Classic Tool Bag .............Cat. #2133.73 Battery Pack - Replacement NiMH 6 V 9000 mAH for Models 6240, 6250 and 6255 ............Cat. #2129.91 Fuse, set of 3, 16 A/250 V, 1 1/4 x 1/4 in (6.3 x 32 mm) fast blow ..Cat. #2129.98 Fuse, set of 10, 2 A/250 V, 3/4 x 3/16 in (5 x 20 mm) fast blow ..Cat. -
Page 11: Features
0.05 % with a maximum resolution of 0.1 μΩ over seven ranges from 5 mΩ to 2.5 kΩ. The Model 6255 is packaged in a sealed case. It provides a rating of IP64 with cover closed (IP53 with cover open) and locking metal measuring terminals. -
Page 12: Key Features
■ Direct display of the measurement with its units, range, measurement mode, and (if activated) temperature compensation. ■ Measurement can be initiated from the front panel or remotely through the 9-pin communication port ■ Rugged, sealed case Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 13: Control Features
Kelvin input terminals AC line recharging receptacle Large multi-line backlit liquid crystal display RTD temperature input Communication / remote operation port Range selection switch Test, Start/Stop button Eight program / function buttons Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 14: Button Functions
▲ and ► buttons. The , and ALARM buttons can be used. Turns the display backlight ON or OFF. Activates or deactivates the buzzer and adjusts the sound level. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 15: Display Symbols
TEST Second position locator for data stored in memory Temperature displayed in either degrees Centigrade or ºC / ºF Fahrenheit PRINT Printing current test result or tests stored in memory Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... - Page 16 2500 milliohm, 1 Amp test range selected 250mΩ 10A 250 milliohm, 10 Amp test range selected 25mΩ 10A 25 milliohm, 10 Amp test range selected 5mΩ 10A 5 milliohm, 10 Amp test range selected Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com...
-
Page 17: Specifications
± 20 % (45 to 400) Hz line voltage Auto-Power Off: when battery voltage <5.0 V Low Battery Indication: The symbol is displayed when the battery needs to be charged. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 18: Mechanical
EN 55022, class B EN 61000-3-2 EN 61000-3-3 Immunity: EN 61000-4-2 electrostatic discharges EN 61000-4-3 radiated fields EN 61000-4-5 shock EN 61000-4-6 conducted disturbances EN 61000-4-11 voltage drops EN 61000-4-4 bursts Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 19: Operation
9. Store the test result in memory by pressing the MEM button at the conclusion of a test. The next available location will be presented on the top line of the display. To use this location, press the MEM button a second time. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 20: Instrument Configuration (Set-Up Mode)
– dEgF – dEgC ALAr – Alarm 1 – Alarm 2 LlgH – t=OFF – t=1 – t=5 – t=10 nEn – dEL – dEL O – Y – n Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 21: Program The 9-Pin Interface Port (Rs)
■ VT100: Activates an RS-232 link between a display terminal and the Model 6255. When activated, the icon will appear on the display. ■ Print: Activates the RS-232 link between a printer and the Model 6255 for direct printing of test results. When activated, the icon will appear on the display. -
Page 22: Setting The Buzzer Level (Buzz)
5. Press the ► button to validate the selection and return to the top level of the Language set-up menu. 6. To proceed to the next programming variable, press the ▲ button. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 23: Setting The Value For The Reference Temperature (Tref)
8. Use the ▲ button to change the leading digit. The minus (-) symbol can also be programmed in this location. 9. When the desired value is reached, press the ► button to move the next digit to the right. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 24: Selecting The Metal Type (Neta)
2. Press the ▲ button until dEg appears on the top line of the display. 3. Press the ► button to enter the degree units sub-menu. 4. Use the ▲ button to toggle through the choices of Fahrenheit (dEgF) or Centigrade (dEgC). Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 25: Setting Alarm Set Point, Direction And Buzzer Level (Alar)
1, 5 or 10 minutes. 1. Turn the rotary switch to the SET-UP position. 2. Press the ▲ button until LlgH appears on the top line of the display. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 26: Clearing The Memory (Nen)
Only objects with data stored in them can be accessed. To return to the beginning of the SET-UP menu, press the ▲ button when nEn is on the top line of the display. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 27: Operating Procedure
The range selection may be changed while the instrument is on. A diagram of the measurement system is shown in Figure 4-2. The Model 6255 generates a current (I) from the internal voltage source (V). A voltmeter measures... -
Page 28: Test Lead Connection
On very large samples such as utility transformers, (10 to 15) minutes charging time may be necessary. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 29: Stand-By (St By) State
4.3.5 Stand-by (ST BY) State This is the position that the Model 6255 returns to at the end of a measurement cycle after: ■ the operator presses the START/STOP button during a test ■ any changes to the position of the rotary switch ■... -
Page 30: Measurement Modes
R = (V ) / I is displayed. 7. All subsequent measurements comprise only a Vn measurement as V remains in memory. The timing sequence for measurement is shown in Figure 4-5. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 31: Resistance Measurement Mode ( )
NOTE: After ending the measurement, with the current turned off, the Model 6255 will discharge the device under test as long as the test leads are connected to the device. OPER STBY 100ms 640ms 120ms 1200ms Figure 4-5 C = connection check 0 = residual voltage measurement (stored) 1,2,3…n = successive voltage measurements across the resistor terminals... - Page 32 ) / I is displayed or error message Err 07 is displayed, if an over range condition occurs. The Model 6255 then returns to the Stand-by state at the end of the measurement. The instrument is ready to perform another measurement.
-
Page 33: Low Inductive Resistance Automatic Triggering Measurement Mode
Its purpose is to compensate the measured or resistance value at the ambient temperature (whether measured or programmed), to the resistance value that it should have at a reference temperature. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. - Page 34 The following table provides the temperature coefficients of the more common metals and alloys. The alpha values for copper and aluminum are pre-programmed into the Model 6255. Others may be programmed by selecting Other Metals and then programming in the alpha constant from the table or other sources. Material Element / Alloy alpha per º...
- Page 35 A 100 Ω platinum RTD can be connected to the front panel of the Model 6255 to perform compensated measurements. The temperature sensor and extension cable assembly, listed in the Accessories section, are recommended. The three pin temperature compensation port is located to the left of the interface port and is configured as shown in Figure 4-7.
-
Page 36: Activating The Compensation Function
Temperature level measured by the temperature sensor if the temperature sensor is activated but is incorrectly connected or not connected at all Measured temperature is out of range (14 to 131) °F (-10 to 55) °C) Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 37: Activating Alarms
These values and direction parameters are programmable. See Setting Alarm Set Point, Direction and Buzzer Levels (§ 4.2.12). The buzzer will sound when Alarm 1 and/or Alarm 2 threshold values are reached. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 38: Memory / Printing
■ Number of the object and test that correspond to the memory location ■ Active range and current level during the measurement ■ Measurement value with any compensation used ■ Alarm icon for any active alarms that occurred during the measurement Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. - Page 39 Measurement Temperature 23.2 C Reference Temperature 20.0 C Resistance Value (T 1294.6 Ohm Resistance Value (T 1287.2 Ohm COMMENTS : ........................Next test date : ___/___/___ Figure 5-1 Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com...
-
Page 40: Cables And Printers Used With The Interface Port
The main connection pins used are shown in Figures 5-3 and 5-4 respectively. Connection to a PC or Terminal: Male Connector Female Connector Printer end Printer end 6255 end Grid Figure 5-3 Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... - Page 41 Direct Printer Connection: Male Connector Female Connector Printer end Printer end Grid Figure 5-4 Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com...
-
Page 42: Dataview ® Software
Click Exit to close. The DataView folder appears on your computer desktop. 7. Open the DataView folder on your desktop. This displays a list of icons for the Control Panel(s) installed with DataView. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 43: Micro-Ohmmeter Control Panel
■ Communication Rate: The serial transfer rate for communicating with the instrument. The Model 6255 defaults to communication rate 9600. ■ Instrument Model: The type of micro-ohmmeter instrument with which your PC is communicating. After you make your selections, click OK to make the connection or Cancel to exit the dialog without establishing communication. -
Page 44: Troubleshooting
7. TROUBLESHOOTING The Model 6255 incorporates internal diagnostics and will inform the operator of any condition needing attention through the use of error messages. The available messages are described below. 7.1 FAULT INDICATORS Err 1 Low battery level Err 2... -
Page 45: Application Examples
8. APPLICATION EXAMPLES The proper procedures for using the Model 6255 in some specific applications are described in this section. 8.1 MEASURING WINDING RESISTANCE OF MOTORS AND TRANSFORMERS WARNING: Prior to and after testing a transformer winding, the energy stored in the magnetic field must be dissipated by shorting the transformer terminals. -
Page 46: Battery Strap Measurements
Each individual cell resistance should not exceed the average by more than 10 %. See the manufacturer’s specifications for typical resistance values. Battery Battery Figure 8-3 Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. .com... -
Page 47: Maintenance
CHARGING THE BATTERY The Model 6255 should be fully charged before using it for the first time. This may take up to 6 hours for a completely discharged battery. If the instrument is in Standby mode and the battery symbol is flashing (or <<Err01>>>... -
Page 48: Charging Indicators
■ Fuse F2, is 0.2 x 0.79 in (5.0 x 20 mm) fast acting, 2 A/250 V, protecting the battery charger power supply board. Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www. -
Page 49: Repair And Calibration
9.6 TECHNICAL ASSISTANCE If you are experiencing any technical problems or require any assistance with the proper operation or application of your instrument, please call, e-mail or fax our technical support team Micro-Ohmmeter Model 6255 - User Manual 1.800.561.8187 information@itm.com www.
Need help?
Do you have a question about the 6255 and is the answer not in the manual?
Questions and answers