Flir Extech 380580 Meter User Manual PDF

USER Manual

Model 380580 Battery Powered Milliohm Meter

Additional User Manual translations available at www.extech.com

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Introduction Congratulations on your purchase of Extechs Model 380580 Battery Powered Milliohm Meter. This device offers five resistance ranges with resolution as low as 0.1m . The 4-wire Kelvin clip connection ensures optimum accuracy. Typical applications include transformer, motor coil, and PC Board resistance measurements. This professional meter, with proper care, will provide years of safe reliable service.

Meter Description

1. Current Terminals

2. Potential Measurement Terminals

3. LCD Display

4. Start/Stop Test Button

5. Range Select/Power Switch

6. LED Error Lights

No Test/Over Temperature

RP Voltage Regulation

RC Current Regulation

7. Current/Range Table

Leads

Current Leads- Banana plug to alligator clip

C1- Green

C2- Blue Voltage Potential Leads- Banana plug to alligator clip P1- Red

P2- Black

Kelvin Clips- Banana Plugs (2) to Kelvin Clip

Red (P1) Green (C1)

Black (P2) and Blue (C2)

Measurement Considerations

1. Do not apply voltage to the meter input terminals. Meter damage may result.

2. Always insure that the circuit to be measured is switched OFF, isolated and completely de-energized before connecting the test leads.

3. If the Over Temperature LED (NO TEST) indicator is lit, allow the instrument to cool down before proceeding further.

4. The RC led indicates when the test current falls out of regulation. Selecting a higher range may eliminate the condition.

5. The RP led indicates when the voltage on the device under test is too high. Selecting a lower range may eliminate the condition.

6. If either the RC or RP led is on, the measurement may be in error.

7. The current terminals are fuse protected.

8. Keep the potential test leads as short as possible. Long leads may introduce noise.

9. When using the four separate alligator clip leads always place the current leads outside the potential leads.

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Preliminary Checks

Current Regulation Check

1. Connect the current leads C1 and C2 to the meter.

2. Set the function switch to the 200.0m range.

3. Momentarily press the TEST RP button. The meter will intermittently beep and RC will light

4. Short the current leads C1 to C2.

5. The RC LED should go off, indicating that the meter is operating correctly.

6. Momentarily press the TEST RP button to stop the test

7. The meter will return to NO TEST status.

Voltage Measurement check

1. With the current test leads C1 and C2 shorted, connect and short the potential (voltage) leads P1 and P2.

2. Set the Function switch to the 200.0m position. The NO TEST status LED will light.

3. Momentarily press the TEST RP button. (the meter will intermittently beep)

4. The display should indicate 00.0

5. Momentarily press the TEST RP button to stop the test.

The NO TEST status LED will light.

6. Remove the shorts from P1 and P2, and C1 and C2 and

7. Short the test leads P1 to C1 and P2 to C2

8. The RP LED as well as the NO TEST status LED should light indicating an over-voltage or over-range

9. Turn the rotary selector switch to OFF

Polarity check

1. Short the test leads P1 to C2 and P2 to C1 together.

2. Set the Function switch to the 200.0m position.

3. The -1 negative indicator should appear in the display.

Operation check

Use the Kelvin clips for this test

1. Short the all the leads (P1, P2 ,C2,C1) together. The P1, P2 ,C2,C1 order is important.

2. Set the Function switch to the 200.0m position. The NO TEST status LED will light.

3. Momentarily press the TEST RP button. (the meter will intermittently beep

4. The display should indicate near 00.0 (+/-0.2m) depending on the test clip connections and both RP and RC LEDs should remain off.

5. Momentarily press the TEST RP button to stop the test.

Note: These tests can be performed on any range.

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Measurement Procedure 1. Select the desired measuring range on the meter. If the resistance of the device is unknown, start

with the highest range and work downward.

2. Clip the test leads onto the device under test. Note: When using the 4-wire/4 alligator clip test leads, it is recommended that the current test leads be outside of the potential test leads (as shown in the diagram below).

3. For a short test duration of 10 seconds, press the TEST RP button for less than 2 seconds. This EnerSave feature can be used to conserve battery power.

4. For a long test duration of 60 seconds, press the TEST RP button for more than 3 seconds.

5. During the test, the meter will intermittently beep. At the end of the test or if the test is stopped, HOLD will appear and the last reading will be frozen on the display.

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Measurement Principles The test current flows through the resistance from the Current+ (C+) terminal to the Current - (C-) terminal. The P+ and P- (POTENTIAL) terminals measure the voltage drop across the device under test only, thus eliminating the lead and contact resistances. The meter displays the resistance based on the test current and the measured voltage; refer to the equation below:

Rx = Vx / Is

Where: Vx is the voltage drop across the device under test; Is is the test current; Rx is the resistance of the device under test.

Thermal Effects

Temperature can have a significant effect on the performance of milliohmeter due to the temperature coefficient of the resistance under test and thermal EMFs across dissimilar conductors. Most conductors have a large temperature coefficient of resistance For example: 0.4%/C for copper. A copper conductor that has a resistance of 10.00m ohm at 20C will increase to 10.40m ohm at 30C. This should be considered. A current going through a resistance will also elevate the temperature so duration of the test can also change the resistance.

How long can the Test leads be on the 380580 Milli-Ohm meter

The total loop resistance in the current leads (C1 and C2), which is made up from the Current Test leads plus the resistor under test, cannot exceed the maximum range resistance. Example: if the meter is set to the 200 Ohm range, the total loop resistance, Test leads plus the resistor under test, cannot exceed 200 Ohms. The Length of the cables does not affect the accuracy as this is a 4-wire measurement. The meter does not need to be zeroed. The longer the leads the higher the resistance in the loop. The test lead resistance can be managed by adjusting the length or the gauge of the wire.

C+

C-

P+

P-

Current Volts

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Note: If the Rp light comes on, the resistance it too high. Change the range or use larger gauge wire or shorten the length of the current test leads. If the Rc light comes on, the loop resistance is too high, as the current is not regulating or the current source fuse is blown. Change the range or use larger gauge wire or shorten the length of the current test leads. Note: To eliminate any stray electrical noise from affecting the measurement, Twist the P1 and P2 cables together all the way from the instrument to the resistor under test.

REPLACING THE FUSES

There are three fuses:

Power Supply Fuse 500mA/250V (5x20mm) fast blow

1. The power supply fuse is in the battery compartment.

2. Remove the two screws to open the battery compartment.

3. Always use a fuse of the proper size and value.

Current Circuit Fuse 500mA/250V (5x20mm) fast blow (F2)

1. Fuse protection for the current terminals.

2. If the fuse is blown, the RC LED will stay on.

3. The fuse is located under the printed circuit board.

4. There are 4 mounting screws that have to be removed.

5. Two screws are located under the black feet on the bottom of the unit.

6. The other two screws are in the battery compartment.

7. Remove the battery compartment door and the batteries to access these screws.

8. Always use a fuse of the proper size and value.

Potential Circuit Fuse 500mA/250V (5x20mm) fast blow (F1)

1. Fuse protection for the potential terminals.

2. If the fuse is blown, the RP LED will stay on.

3. The fuse is located under the printed circuit board.

4. There are 4 mounting screws that must be removed.

5. Two screws are located under the black feet on the bottom of the unit.

6. The other two screws are in the battery compartment.

7. Remove the battery compartment door and the batteries to access these screws.

8. Always use a fuse of the proper size and value.

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BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover.

1. Turn power off and disconnect the test leads from the meter.

2. Open the rear battery cover by removing two screws (B) using a slotted head screwdriver.

3. Insert the batteries into battery holder, observing the correct polarity.

4. Put the battery cover back in place. Secure with the screws. You, as the end user, are legally bound (Battery ordinance) to return all used batteries and accumulators; disposal in the household garbage is prohibited!

You can hand over your used batteries / accumulators at collection points in your community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle.

Specifications General Specifications

Display 1.0" (25 mm) LCD (1999 counts)

Measurement terminals 4-Terminal Kelvin type

Measurement Range Five ranges (see listing below)

Sampling Time Approximately 3 times per second

Over input indication Indication of "1 - - -"

Operating Temperature 5F to 131F (-15C to 55C)

Operating Humidity <80% RH

Power Supply 8 x 1.5V AA Batteries (Approx. 10hrs continuous use)

Weight 3.3 lbs (1.5kg)

Dimensions 9.8x7.5x4.3" (250x190x110 mm) with cover

Fuses 3 fuses all are 500mA/250V (5x20mm) fast blow

Range Specifications

Range

Resolution

Test Current

Accuracy (%reading )

Open Circuit Voltage

200.0m 0.1m 100mA 0.5% + 2 digits 4.2V

2000m 1m 100mA 0.5% + 2 digits 4.2V

20.00 0.01 10mA 0.5% + 2 digits 4.2V

200.0 0.1 10mA 0.5% + 2 digits 4.3V

2000 1 1mA 0.5% + 2 digits 4.4V

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International Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present

9. Double insulation

Two-year Warranty Teledyne FLIR warrants this Extech brand instrument to be free of defects in parts and workmanship for two years from date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty text please visit: http://www.extech.com/support/warranties.

Calibration and Repair Services

Teledyne FLIR offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to-date product information: www.extech.com.

Contact Customer Support

Customer Support Telephone List: https://support.flir.com/contact

Calibration, Repair, and Returns: repair@extech.com

Technical Support: https://support.flir.com