AEMC 6292 Use and care manual

v1 – 03/2015
SERVICE/CALIBRATION MANUAL
Micro-Ohmmeter
AEMC®Model 6292
(Cat. #2129.83)
This document is confidential property of Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments and may not be reproduced without permission.
AEMC®Instruments retains the right to make changes to specifications herein at any time, without notice.

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
TABLE OF CONTENTS
1. Functional Test ..................................................................................................................................... 3
2. Calibration Check ................................................................................................................................. 4
Requirements................................................................................................................................... 4
3. Calibration ............................................................................................................................................. 5
Requirements................................................................................................................................... 5
Entering Calibration Mode................................................................................................................ 5
Commands....................................................................................................................................... 6
Calibration Procedure....................................................................................................................... 7
4. Firmware Update................................................................................................................................... 8
Requirements................................................................................................................................... 8
Firmware Update Procedure ............................................................................................................ 8
5. USB Interface Update ......................................................................................................................... 11
Requirements................................................................................................................................. 11
USB Interface Update Procedure................................................................................................... 11
Repair and Calibration.............................................................................................................................. 12
Technical and Sales Assistance .............................................................................................................. 12
Limited Warranty....................................................................................................................................... 13
Warranty Repairs....................................................................................................................................... 13
v1 - 03/15 - 2 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
1. Functional Test
It is advisable to test all the items listed in the following table.
CHECKLIST
ITEM
S TAT U S
Ok / Not Ok
USB Interface
Firmware Updating (BootLoader)
Rotary switch: (Turn right, turn left, pull)
Keyboard:
•Test all switches
•Check LEDs of CAPS LOCK and NUM LOCK Keys
Real Time Clock:
•Adjust hour and date through menu
•Check if clock is running (after some minutes)
LCD Backlight (try by menu)
LCD Contrast (try by menu)
Generation of 200A and resistance measurement
Grounding loop (Test using the auxiliary clamp in the two senses/ways )
Memory:
•Save a test result
•Recall a test saved
•Erase the memory
Fan:
•On mode
•Auto mode
Check the high voltage detection on the output bornes (using 30VAC)
Safety generation cutting by Overheating
Calibration
Power supply voltage and frequency (presented on main screen of calibration)
Serial number (check in System Info menu)
v1 - 03/15 - 3 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
2. Calibration Check
Requirements
•One set of standard test cables
•Shunt 100mVx200A (50μΩ)
•Shunt 166mVx100A (166.6μΩ)
•Shunt 200mVx200A (1000μΩ)
•Shunt 5Vx10A (500mΩ)
Check the different values from the chart below:
FUNCTION
TESTED
RANGE STANDARD
VALUE
TOLERANCE
MIN MAX
200A 2000 µΩ50.0 µΩ49.5 µΩ50.5 µΩ
100 µΩ99.0 µΩ101.0 µΩ
1000 µΩ990.0 µΩ1010.0 µΩ
100A 2000 µΩ50 µΩ49.5 µΩ50.5 µΩ
100 µΩ99.0 µΩ101.0 µΩ
166.6 µΩ165.0 µΩ168.3 µΩ
1000 µΩ990.0 µΩ1010.0 µΩ
10A 500 mΩ495.0 mΩ505.0 mΩ
Accuracy: 1% of reading
If one of the values is not correct, follow the calibration procedure in the next section.
v1 - 03/15 - 4 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
3. Calibration
Requirements
•Computer with USB2.0 or higher
•USB drivers installed (installed with Dataview software)
•HyperTerminal (or other terminal emulation program)
•One set of standard test cables
•Shunt 200mVx200A (1000μΩ)
•Shunt 5Vx10A (500mΩ)
Entering Calibration Mode
1. Connect the USB cable from the computer to the powered off AEMC 6292.
2. Launch HyperTerminal.
3. Configure HyperTerminal Com Port as shown below (same as Control Panel > Device Manager).
◦57600 bps, 8 bits, No Parity, No Flow Control
4. Start the connection in HyperTerminal.
5. Press and hold the STOP key.
6. Power on the instrument, while pressing the STOP key.
7. When the auto tests complete, release the STOP key.
8. The following screen will be displayed.
ADJUST MODE
v1 - 03/15 - 5 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
9. In the HyperTerminal window, a Password will be requested. Type the character 'k' (lowercase).
10. The following screen will be displayed.
•The first line indicates the equipment has entered calibration mode.
•The second line shows the test setup, which is irrelevant because in calibration mode the AEMC
6292 will always work manually for an unlimited amount of time.
•The third line is important to show the equipment is recognizing the main power supply frequency. This
way it will be able to select the appropriate filter to work.
Commands
Character
Function
r
Shows the resistance operating range and it’s status.
d
Fine adjustment of resistance value down.
D
Adjustment of resistance value down.
u
Fine adjustment of resistance value up.
U
Adjustment of resistance value up.
s
Saves the last adjustment.
Adjust mode
Normal (200A
– 120s)
V=220V f=60Hz
09/03/13 04:27 PM
v1 - 03/15 - 6 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
Calibration Procedure
Warning: In calibration mode, the test duration is unlimited. To avoid overheating, finish the
adjustment as fast as possible.
1. Put the AEMC 6292 in calibration mode (see previous procedure).
2. Setup the AEMC 6292 to perform a test using the 1000μΩ shunt.
3. Press the START key to initiate the test.
4. Type the character 'r' through HyperTerminal to see the operating range.
5. Using the current adjust knob, increase the current to 200A, wait a few seconds for the resistance value to
become stable and perform the adjustment sending the appropriate command through HyperTerminal.
6. After reaching the target value, save the adjustment type the character 's'.
7. Stop the test.
8. Setup the AEMC 6292 to perform a test using the 500mΩ shunt.
9. Repeat the same steps to calibrate the second range of resistance, but use 10A instead of 200A;
v1 - 03/15 - 7 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
4. Firmware Update
Requirements
•Computer with USB2.0 or higher
•USB drivers installed
•HyperTerminal (or other terminal emulation program)
Firmware Update Procedure
1. Connect the USB cable from computer to the powered off AEMC 6292.
2. Launch HyperTerminal.
3. Configure HyperTerminal Com Port as shown below (same as Control Panel > Device Manager).
◦57600 bps, 8 bits, No parity, No Flow Control
4. Press and hold the ZERO and TWO keys.
5. Power on the instrument, while pressing the ZERO and TWO keys.
6. The following screen will be displayed.
FIRMWARE UPDATE!
v1 - 03/15 - 8 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
7. In HyperTerminal, press the button “Call” (represented by a yellow phone) to start the connection.
8. If the connection was made successfully, the 'S' character will be displayed sequentially in HyperTerminal
screen.
9. In the main menu, choose Transfer > Send File.
10. Select the new firmware file.
11. In the same window, choose the Xmodem protocol.
v1 - 03/15 - 9 -

MODEL 6292 SERVICE/CALIBRATION MANUAL CAT.# 2129.83
12. Press Send to start firmware update. The following window will be displayed:
13. At the end of the firmware update, the window above will automatically be closed and the application will
start in the equipment.
v1 - 03/15 - 10 -