Aemc micro-ohmmeter model 5600 manual

A built-in thermal switch prevents the micro-ohmmeter against overheating on the 10A range when in continuous use. The AEMC micro-ohmmeter is housed in a sealed, safety yellow field case with carrying handle and a lid that may be removed during testing if desired. Quote Add-Ons. Tech Support With Every Rental.

Worldwide Delivery. Documents Datasheet. Applications Contact resistance of breakers and switches Wire to terminal connections Winding resistance of motors and transformers Resistance on electric motors Aircraft and rail bonds Grounding connections Battery strap measurements. Do not forget to unplug the two leads that connect the power supply board in the bottom of the case to the boards, which are mounted in the chassis.

Be sure to note the polarity when reconnecting the leads. Detachable Cover The cover hinges are fitted with spring-loaded clips, which allow the cover to be removed.

To detach the cover from the Model , open the lid to a horizontal position and apply downward pressure to the hinge side of the cover while gripping it firmly see Fig.

To re-attach the cover, position the cover in a horizontal position and fit the hinges into the respective housing. Apply strong rear-to-front pressure to the cover until it snaps into place. The instrument includes a V supply cord, which provides the charging voltage for the rechargeable battery.

To change the charging voltage, disassemble the unit as previously noted. A V supply cord not supplied is required for V operation.

When the flashing stops, the instrument no longer has sufficient power to perform any further tests. Recharge the batteries. This indicating light will remain on as long as the instrument is connected to AC supply. If the measured resistance is very high in relation to the range.

Switching to a higher range will extinguish the light. If the current output is zero, due to an open circuit or blown fuse. The other ranges may still be used during this condition. Warning When using 20 ft spring loaded Kelvin lead Cat.

Measured values are good. Connections and Reading Clean all surfaces before connecting test leads. Verify a solid connection between test leads and the sample. The range selection may be changed while the instrument remains energized. Read the displayed resistance value directly.

The use of a Kelvin connection eliminates test lead resistance, as shown in Figure 5. These currents can be present due to a variety of reasons including chemical or thermal EMF in samples made of dissimilar metals. You can eliminate the effects of this by reversing the direction of current flow inverter switch, see Figure 6 and using the average of forward and reverse readings.

A minus sign will appear in the display when the switch is in the reverse position. Disregard this sign when calculating the average values. The presence of AC interference in the sample under test may cause the measured value on the display to fluctuate. This interference may become more noticeable in the presence of strong electric fields. The effects of this interference may be reduced by twisting the leads together. On inductive loads e. On very large samples such as utility transformers, 10 to 15 minutes charging time may be necessary.

For additional safety, the transformer terminals should be jumpered together before the instrument is disconnected. One terminal of the sample should be grounded for safety! Make connections to the transformer as shown in Figure 7. On larger transformers, the measurement stabilization time will increase. Make contact with each segment on the motor commutator.

Allow approximately two seconds for the display to stabilize. F1 Figure 8 - 15 - Micro-Ohmmeter Model Battery Strap Measurements Proper battery strap resistance measurements will help ensure proper voltage output. The resistance on battery strap connections should be measured using the Kelvin probes see Figure 9. Measurements must be made with the system power turned off.

The average resistance of all the intercell connections should be determined by totaling the individual resistances and dividing by the number of connectors.

See the manufacturer's specifications for typical resistance values. If the instrument has been left unused for several months, recharge the battery.