Atec AEMC-6240-6250 - Manual (Page 2)

2 www.aemc.com Technical Assistance (800) 343-1391
The 10A Micro-Ohmmeter Model 6250 is a rugged, low resistance tester designed for plant
maintenance, quality control in manufacturing and field use. Utilizing a four-lead Kelvin
method of testing, the Model 6250 is one of the more accurate Micro-Ohmmeters available,
with results up to 0.05% high accuracy.
Resistance measurements are automatically calculated and displayed, taking into account
the measurement value, ambient temperature, reference temperature and metal temperature
coefficient. Sample temperature can be manually entered by the operator or directly
measured by the Model 6250 with an external RTD temperature probe.
The Model 6250 is uniquely designed to conduct tests on both resistive and inductive
material, with operator selection directly from the front panel. Three test modes are available
and automatically employed based on this selection:
Resistive materials (i.e. ground bonding, coatings, contact resistances) are tested with an
instantaneous test. Simply press the test button – the reading is taken and the test is
concluded.
Inductive materials (i.e. coils, transformers, motor windings) are tested with a continuous
test. The test is started and stopped by the operator at the push of a button.
Auto test mode is designed for multiple test points on resistive and/or low inductance
material. The test is started at the press of a button. As the operator moves the probe from
one point to another, the test is stopped, the results are displayed and a new test is started
when the test probes again make contact – no need to press the test button! Residual
voltage is measured between tests to ensure proper results. This test mode continues until
the operator presses the button to conclude the testing.
The large, easy-to-read display shows the resistance measurement, ambient and reference
temperatures, metal type and test method, as well as alarm conditions and memory
utilization, all in real time. Previously stored test results can easily be called up for review on
the display or sent directly to a printer or remote terminal.
Two programmable alarm set points are available. Each can be either active high or low and
will sound an alarm when tripped, further adding to the ease of use by permitting quick Pass/
Fail measurements. External trigger operation is available through the communication port
allowing the test to be conducted from a remote location.
The list of features and functions goes on and on. The Model 6250 will be a valuable asset
for your bond testing, coil and contact testing as well as coatings and connector or any other
low resistance testing application.
FEATURES
► Measure from 0.0001mΩ
(0.1μΩ resolution) to 2500.0Ω
► Test current selection of 1mA, 10mA,
100mA, 1A and 10A
► RTD temperature probe to check
tested sample (optional)
► Selectable metal types
► Automatic and manual temperature
correction
► EMF levels measured and eliminated
in measurement
► Two programmable alarm set points
► Stores up to 1500 test results
► Selectable Inductive or Resistive test modes
► Automatic multiple test mode (multiple tests
without pressing the test button)
► Large multi-line electroluminescent display
► Local or remote test setup and control
► Direct printout
► Internal rechargeable batteries –
conduct up to 5000 10A tests
► Rugged, double insulated
waterproof case
APPLICATIONS
► Aerospace metallic coating
resistance measurement
► Winding resistance measurement of motors
and transformers
► Bonding verification on earth/ground systems
► Weld joint integrity verification
► Contact resistance measurement of breakers
and switchgear
► Aircraft and rail bonding checks
► Wire to terminal connections and
resistance checks
► Battery strap resistance checks
► Cable joint and bus bar connection checks
► Mechanical bond tests
Model 6240 Model 6250
Low Resistance, High Accuracy
Model 6250