AEMC instruments 6240 User manual
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1.4.1 Accessories and Replacement Parts............................6
4.3.1 Measurement Readings..............................................17
4.3.2 Connections and Readings.........................................17
4.3.3 Test Lead Connection .................................................18
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4.9.1 Erasing Selected Measurements................................23
4.9.2 Erasing All Measurements ..........................................23
6.1.1 Voltage Present ..........................................................27
6.1.2 Overrange ...................................................................28
6.1.3 Noisy Measurement....................................................28
6.1.4 Overheating ................................................................28
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These safety warnings are provided to ensure the safety of
personnel and proper operation of the instrument.
• This instrument is protected from accidental voltages of
not more than 50V with respect to earth in measurement
Category III.
• Do not attempt to perform any tests with this instrument
until you have read the user manual.
• Tests are to be carried out on de-energized circuits only!
Never connect the unit to a live circuit.
• Make sure that none of the input terminals are connected
and that the switch is set to OFF before plugging in the AC
power to recharge the battery of the instrument.
• Make sure the internal battery is fully charged prior to
testing. If the instrument has been left unused for several
months, recharge the battery.
• If the case needs cleaning, do not use any alcohol or oil
based cleaners. Preferably use soapy water with a damp
cloth or sponge. Do not immerse the 6240 micro-ohmmeter
in water.
• Use connection accessories of which the overvoltage
category and the service voltage are greater than or equal
to those of the measuring instrument (50V CAT III). Use
only accessories that comply with safety standards (IEC
61010).
• The test leads and measuring wires must be in good
condition and should be replaced if there is any evidence
of deterioration (insulation split, burnt, etc.).
or the factory.
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CAT IV: For measurements performed at the primary electrical supply
(<1000V) such as on primary overcurrent protection devices,
ripple control units, or meters.
CAT III: For measurements performed in the building installation at
installation and circuit breakers.
CAT II: For measurements performed on circuits directly connected to
on household appliances or portable tools.
Upon receiving your shipment, make sure that the contents are consistent
with the packing list. Notify your distributor of any missing items. If the equip-
notify your distributor at once, giving a detailed description of any damage.
Save the damaged packing container to substantiate your claim.
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Micro-ohmmeter Model 6240 ............................................ Cat. #2129.80
Includes extra large tool bag, set of two 10ft Kelvin clips (10A - Hippo), set of two 10ft Kelvin
probes (1A - Spring Loaded), optical USB cable, US 115V power cord, two spare fuses
(12.5A), NiMH rechargeable battery pack, and USB stick supplied with product user manual
and DataView® software.
Kelvin clips (10A - Hippo), 10 ft color-coded leads
with spade lug terminations................................................. Cat. #1017.84
Kelvin clips (10A - Hippo), 20 ft color-coded leads
with spade lug terminations................................................. Cat. #2118.70
Kelvin Probes (1A - Spring Loaded), 10 ft with 4mm banana
plug termination (includes set of 5 fork terminals) ............... Cat. #2118.73
Kelvin Probes (1A - Spring Loaded), 20 ft with 4mm banana
plug termination (includes set of 5 fork terminals) ............... Cat. #2118.74
Kelvin Probes Pistol Grip 10 ft (10A) Spring Loaded........... Cat. #2118.75
Kelvin Probes Pistol Grip 20 ft (10A) Spring Loaded........... Cat. #2118.76
Kelvin Probes 10 ft (10A) Spring Loaded ........................... Cat. #2118.77
Kelvin Probes 20 ft (10A) Spring Loaded ............................ Cat. #2118.78
Kelvin Clips 10 ft (1-10A)..................................................... Cat. #2118.79
Kelvin Clips 20 ft (1-10A)..................................................... Cat. #2118.80
Thermo-Hygrometer Model CA846 ..................................... Cat. #2121.24
Optical USB Cable............................................................... Cat. #2135.41
Battery – Replacement NiMH 6V 9000mAH
for Model 6240..................................................................... Cat. #2129.91
............................. Cat. #2129.92
.............................................. Cat. #2133.73
Inverter – 12VDC to 120VAC 200 Watt for vehicle use......... Cat. #2135.43
115V Power Cord US .......................................................... Cat. #5000.14
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The Micro-ohmmeter Model 6240 is used to perform low resistance
to 400
currents from 10mA to 10A.
-
ration, which eliminates test lead resistance for a measurement accuracy
pack with a built-in recharger (110/220V).
the value of resistance, current or voltage test, polarity and battery
charge.
For operator safety and instrument protection, the micro-ohmmeter is
fuse protected at the inputs. One fuse, accessible from the front panel,
protects against stored energy in inductive loads.
Enhanced internal circuitry protects against possible inductive kickback
A built-in thermal switch protects the micro-ohmmeter against overheating
on the 10A range when in continuous use.
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Some of the more popular and most frequent uses of the micro-ohmmeter
are in applications for:
• Checking metallic coating resistance, especially in aeronautics
• Ground connections and continuity measurement
• Resistance measurements on motors and small transformers
• Contact resistance measurements on breakers and switches
• Component measurement
• Electrical cable resistance measurement
• Mechanical bond tests
• Wire to terminal connections
• Aircraft and rail bonds
• Measures from 5µ to 400
• Test current selection from 10mA to 10A
• Manual temperature compensation (with DataView software)
• Front panel polarity reverse function
• Stores up to 99 test results
• Operator safety by automatic discharge of residual charge on
the equipment under test
• Auto store of multiple test results
• Internal, rechargeable batteries conduct up to 850, 10A tests
• A built-in battery pack recharger recharges the batteries by
connecting to the AC line (110V-230V, 50/60Hz) using a
standard line cord
• 4-Wire measurement with automatic compensation of
undesirable voltages and lead resistance
• Large multi-function backlit display
• Direct display of the measurement with units, range and test
current
• Rugged, sealed case
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Figure 2-1
1. Kelvin input terminals
2. AC line recharging receptacle
4. Large multi-line backlit liquid crystal display (see § 2.6)
5. Optical interface connector for connection to a computer
6. Range selection switch
7. Start/Stop button
8. Program / function buttons (see § 2.5)
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