Free Digital Multimeter Calibration Procedure 131e5q
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Free Digital Multimeter Calibration Procedure
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Digital Multimeter Calibration Purpose The purpose of this procedure is to provide instruction for the calibration of digital multimeters (DMM).
Calibration Control Email: * Name: *
Scope
Company: *
All multimeters (multirange instruments used to measure voltage, current, and
Day Phone:
resistance) are to be verified in calibration no less than once per year.
Sign In & Software
Procedure Preliminary Instructions and Notes 1. Read this entire procedure before beginning the calibration. 2. Calibration shall be performed in an environment that conforms to Manufacturer Specifications.
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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3. The digital multimeter will hereafter be referred to as the Instrument Under Test (IUT). 4. that the IUT is clean. 5. Visually examine the IUT for any condition that could cause errors in the calibration. 6. If any of the requirements cannot be met, refer to the applicable manufacturer manual. 7. If a malfunction occurs or a defect is observed while calibration is in progress, the calibration shall be discontinued and necessary corrective action taken; if corrective action affects a measurement function previously calibrated, the function shall be recalibrated before the remainder of the procedure implemented.
Reference Material Applicable Manufacturers Manual or Brochures.
Specifications The specifications of the IUT are determined by the applicable manufacturer's documentation. If the manufacturer's documentation is not available, then the specifications identified in this procedure are used.
Equipment Required The Standards listed below should be selected on the basis of their higher accuracy level when compared to the unit under test. Equivalent Standards must be equal to or better
than the MinimumUseSpecification. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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Free Digital Multimeter Calibration Procedure
MinimumUseSpecifications for Standards listed are 1/4 the accuracy required by the IUT. Rotek Model 2500 Calibrator or equivalent Diode Test Fixture Test Leads Continuity Test Fixture Capacitance Test Fixture Thermometer Hydrometer
SetUp Turn all power on (calibrator and the unit to be calibrated). Allow the instruments to stabilize for approximately 5 minutes. Conduct the tests in an ambient temperature of 25 ± 5C and a relative humidity of less than 80%. Note: If the IUT has an automatic ranging feature, then the function being checked (i.e. voltage, current, or resistance) must be verified in the variable range mode as well.
Battery Replacement Replace the battery in the IUT and make sure the battery s are not dirty.
Detailed Procedure DISPLAY AND SWITCH TEST http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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Turn the IUT on and that all LCD segments are working and not dim. that the selector switch(s) is/are working properly. Make sure the Low Battery indicator is not showing. RESISTANCE CHECK
Connect the calibrator between the V/ohm and common input terminals of the IUT. Use the following chart to the resistance values. Step
Range
Input
Display
1
200 ohm
Short
00.0 to 00.5
2
2 k ohm
Short
0.000 to 0.001
3
2 k ohm
1 k ohm
.998 to 1.002
4
20 k ohm
10 k ohm
9,98 to 10.02
5
200 k ohm
100 k ohm
99.8 to 100.2
6
2000 k ohm
1 M ohm
998 to 1002
7
2000 M ohm
Open
0.10 to 00.0
CONTINUITY TEST
1. Select the continuity check function on the calibrator. 2. Connect the test leads to the V/ohm and common terminals of the IUT. 3. Momentarily short the test leads together and observe that the tone sounds. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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4. Connect the test leads to the continuity test fixture between the 100 ohm test points. No tone should be heard indicating nonterminating connection. 5. Connect the test leads to the continuity test fixture between the 50 ohm set up. The test tone should indicate continuity between the test points. DC VOLTAGE TEST
1. Use the calibrator to supply the correct DC voltage listed below. 2. Set the calibrator for a zero volt input. 3. Connect the calibrator output to the V/ohm and common input terminals of the IUT. Note: Connect the ground/common/low side of the Rotek 2500 to the common on the IUT.
4. With reference to the table below, select the IUT voltage range and set the calibrator output to the corresponding IUT input voltage. Test per the following chart and that the display falls within the limits given. Step
Range
Input
Display
1
200mV
190mV
189.7 to 190.3
2
200mV 190mV 189.7 to 190.3
3
2V
0.0V
0.001 to 0.001
4
2V
1.9V
1.897 to 1.903
5
20V
19V
18.97 to 19.03
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6
200V
100V
99.84 to 100.16
7
1000V
400V
399.3 to 400.6
AC VOLTAGE TEST
Use the calibrator to supply the correct AC voltage in the following test: 1. Set the calibrator to 60 Hz. 2. Connect the calibrator output to the V/ohm and common input terminals of the IUT. Connect the ground/common/low side of the calibrator to common on the IUT. 3. With reference to the table below, select the IUT voltage range given in step 1 and set the calibrator output to the corresponding IUT input voltage. that the display reading is within the limits shown. Step
Range
Input
1
200mV 100mV
Display 99.0 to 101.0
2
2V
1V
0.990 to 1.010
3
20V
10V
9.90
4
200V
100V
99.0 to 100.1
5
750V
400V
294 to 406
DC CURRENT TEST
Use the calibrator to supply the correct DC current listed in the table below: http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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1. Set the output of the calibrator to zero mA. 2. Connect the output of the calibrator to the lowest current terminal (typically 200 mA) and common input terminal on the IUT. Note: Do not exceed the maximum current rating of the meter. Only test for values the meter is capable of reading. 3. With reference to the table below, select the IUT current range and set the calibration output to provide the corresponding IUT input current. that the display reading is within the limits shown. Step
Range
Input
Display
1
200?A
190?A
189.7 to 192.3
2
2mA
1.9mA
1.897 to 1.923
3
20mA
19mA
18.97 to 19.23
4
200mA 190mA 189.7 to 192.3
4. Disconnect the calibrator and change the current terminal on the IUT to the highest setting (typically 10 A) leaving the common input terminal connected. 5. Use the following table to that the meter is functioning within the specified parameters. Step Range Input
Display
1
10A
1A
0.98 to 1.02
2
10A
5A
4.90 to 5.10
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3
10A
9A
8.82 to 9.18
AC CURRENT TEST
Use the calibrator to supply the correct AC current listed in the table below: 1. Use the following table to that the meter is functioning within the specified parameters. 2. Set the output of the calibrator to zero mA. 3. Connect the output of the calibrator to the low current input terminal (typically 200 mA) and the common terminal of the unit under test. Note: Do not exceed the maximum current rating of the meter. Only test for values the meter is capable of reading. 4. With reference to the table below, select the IUT current range and set the calibrator output to provide the corresponding IUT input current. that the display reading is within the limits shown. Step
Range
Input
Display
1
200?A
190?A
18.27 to 19.28
2
2mA
1.9mA
1.872 to 1.928
3
20mA
19mA
18.72 to 19.28
4
200mA 190mA 187.2 to 192.8
5. Disconnect the calibrator and change the current terminal on the IUT to the highest http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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setting (typically 10 A) leaving the common input terminal connected. 6. Use the following table to that the meter is functioning within the specified parameters. Step Range Input
Display
1
10A
1A
0.97 to 1.03
2
10A
5A
4.87 to 5.13
3
10A
9A
8.77 to 9.23
LOGIC TEST
Use this procedure to test weather the logic function is indicating the correct state. 1. Set the IUT to the logic test mode and insert the test leads into the V/ohm and common terminals. 2. Short the leads together and that the meter indicates a low logic state. 3. Set the calibrator to 0.400 VDC and connect the meter to the output terminals. that the meter indicates a low logic state. 4. Set the calibrator to 3.500 VDC and that the IUT indicates a high logic state. FREQUENCY TEST
1. Connect an oscilloscope to a function generator to measure AC sine waves. 2. Set the function generator to output 10 VAC and use the oscilloscope to set the frequencies from the following table. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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3. Connect the IUT leads to the V/ohm and common terminals on the IUT and to the ground and output of the function generator. 4. the meter is displaying proper results from the table. Step Range
Input
Display
1
Hz
60 Hz @ 10V
59.4 to 60.6
2
Hz
1 kHz @ 10V
.990 to 1.010k
3
Hz
1 MHz @ 10V .990 to 1.010M
CAPACITANCE TEST
1. Set the IUT to measure capacitance, insert the test leads into the V/ohm and common test terminals. 2. Connect the meter to the capacitance test fixture and use the following table to determine the ability of the IUT. Step
Range
Input
Display
1
Capacitance
10 micro F
9.85 to 10.15
2
Capacitance
1 micro F
.985 to 1.015
3
Capacitance 100 micro F 98.5 to 101.5
DIODE TEST
1. Set the IUT to the diode check function and connect the test leads to the V/ohm http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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and common terminals. 2. Connect the test leads to the diode test fixture and follow the steps in the proceeding table to diode test operation. Step
Range
Setup
Polarity
Display
Tone
1
Diode Check
Short
N/A
.000 to .001
Yes
2
Diode Check
Si
Forward .800 to .600
Yes
3
Diode Check
Si
Reverse
No
4
Diode Check
Ge
Forward .300 to .500
Yes
5
Diode Check
Ge
Reverse
No
1.
1.
Note: Some meters are not designed to emit a tone.
Reason for Reissue Revision A First Release
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Copyright © 1992 to 2016 Ape Software all rights reserved | Home |
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
Privacy Policy
Phone: 5594406052
12/12
Free Digital Multimeter Calibration Procedure
sign in | | us | cart phone: 5594406052 site search pay your invoice or quote online
Home
Calibration Control
Get Help
Procedures
site home | calibration procedures | digital multimeter
Digital Multimeter Calibration Purpose The purpose of this procedure is to provide instruction for the calibration of digital multimeters (DMM).
Calibration Control Email: * Name: *
Scope
Company: *
All multimeters (multirange instruments used to measure voltage, current, and
Day Phone:
resistance) are to be verified in calibration no less than once per year.
Sign In & Software
Procedure Preliminary Instructions and Notes 1. Read this entire procedure before beginning the calibration. 2. Calibration shall be performed in an environment that conforms to Manufacturer Specifications.
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
1/12
23/01/2016
Free Digital Multimeter Calibration Procedure
3. The digital multimeter will hereafter be referred to as the Instrument Under Test (IUT). 4. that the IUT is clean. 5. Visually examine the IUT for any condition that could cause errors in the calibration. 6. If any of the requirements cannot be met, refer to the applicable manufacturer manual. 7. If a malfunction occurs or a defect is observed while calibration is in progress, the calibration shall be discontinued and necessary corrective action taken; if corrective action affects a measurement function previously calibrated, the function shall be recalibrated before the remainder of the procedure implemented.
Reference Material Applicable Manufacturers Manual or Brochures.
Specifications The specifications of the IUT are determined by the applicable manufacturer's documentation. If the manufacturer's documentation is not available, then the specifications identified in this procedure are used.
Equipment Required The Standards listed below should be selected on the basis of their higher accuracy level when compared to the unit under test. Equivalent Standards must be equal to or better
than the MinimumUseSpecification. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
2/12
23/01/2016
Free Digital Multimeter Calibration Procedure
MinimumUseSpecifications for Standards listed are 1/4 the accuracy required by the IUT. Rotek Model 2500 Calibrator or equivalent Diode Test Fixture Test Leads Continuity Test Fixture Capacitance Test Fixture Thermometer Hydrometer
SetUp Turn all power on (calibrator and the unit to be calibrated). Allow the instruments to stabilize for approximately 5 minutes. Conduct the tests in an ambient temperature of 25 ± 5C and a relative humidity of less than 80%. Note: If the IUT has an automatic ranging feature, then the function being checked (i.e. voltage, current, or resistance) must be verified in the variable range mode as well.
Battery Replacement Replace the battery in the IUT and make sure the battery s are not dirty.
Detailed Procedure DISPLAY AND SWITCH TEST http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
3/12
23/01/2016
Free Digital Multimeter Calibration Procedure
Turn the IUT on and that all LCD segments are working and not dim. that the selector switch(s) is/are working properly. Make sure the Low Battery indicator is not showing. RESISTANCE CHECK
Connect the calibrator between the V/ohm and common input terminals of the IUT. Use the following chart to the resistance values. Step
Range
Input
Display
1
200 ohm
Short
00.0 to 00.5
2
2 k ohm
Short
0.000 to 0.001
3
2 k ohm
1 k ohm
.998 to 1.002
4
20 k ohm
10 k ohm
9,98 to 10.02
5
200 k ohm
100 k ohm
99.8 to 100.2
6
2000 k ohm
1 M ohm
998 to 1002
7
2000 M ohm
Open
0.10 to 00.0
CONTINUITY TEST
1. Select the continuity check function on the calibrator. 2. Connect the test leads to the V/ohm and common terminals of the IUT. 3. Momentarily short the test leads together and observe that the tone sounds. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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4. Connect the test leads to the continuity test fixture between the 100 ohm test points. No tone should be heard indicating nonterminating connection. 5. Connect the test leads to the continuity test fixture between the 50 ohm set up. The test tone should indicate continuity between the test points. DC VOLTAGE TEST
1. Use the calibrator to supply the correct DC voltage listed below. 2. Set the calibrator for a zero volt input. 3. Connect the calibrator output to the V/ohm and common input terminals of the IUT. Note: Connect the ground/common/low side of the Rotek 2500 to the common on the IUT.
4. With reference to the table below, select the IUT voltage range and set the calibrator output to the corresponding IUT input voltage. Test per the following chart and that the display falls within the limits given. Step
Range
Input
Display
1
200mV
190mV
189.7 to 190.3
2
200mV 190mV 189.7 to 190.3
3
2V
0.0V
0.001 to 0.001
4
2V
1.9V
1.897 to 1.903
5
20V
19V
18.97 to 19.03
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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6
200V
100V
99.84 to 100.16
7
1000V
400V
399.3 to 400.6
AC VOLTAGE TEST
Use the calibrator to supply the correct AC voltage in the following test: 1. Set the calibrator to 60 Hz. 2. Connect the calibrator output to the V/ohm and common input terminals of the IUT. Connect the ground/common/low side of the calibrator to common on the IUT. 3. With reference to the table below, select the IUT voltage range given in step 1 and set the calibrator output to the corresponding IUT input voltage. that the display reading is within the limits shown. Step
Range
Input
1
200mV 100mV
Display 99.0 to 101.0
2
2V
1V
0.990 to 1.010
3
20V
10V
9.90
4
200V
100V
99.0 to 100.1
5
750V
400V
294 to 406
DC CURRENT TEST
Use the calibrator to supply the correct DC current listed in the table below: http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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1. Set the output of the calibrator to zero mA. 2. Connect the output of the calibrator to the lowest current terminal (typically 200 mA) and common input terminal on the IUT. Note: Do not exceed the maximum current rating of the meter. Only test for values the meter is capable of reading. 3. With reference to the table below, select the IUT current range and set the calibration output to provide the corresponding IUT input current. that the display reading is within the limits shown. Step
Range
Input
Display
1
200?A
190?A
189.7 to 192.3
2
2mA
1.9mA
1.897 to 1.923
3
20mA
19mA
18.97 to 19.23
4
200mA 190mA 189.7 to 192.3
4. Disconnect the calibrator and change the current terminal on the IUT to the highest setting (typically 10 A) leaving the common input terminal connected. 5. Use the following table to that the meter is functioning within the specified parameters. Step Range Input
Display
1
10A
1A
0.98 to 1.02
2
10A
5A
4.90 to 5.10
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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Free Digital Multimeter Calibration Procedure
3
10A
9A
8.82 to 9.18
AC CURRENT TEST
Use the calibrator to supply the correct AC current listed in the table below: 1. Use the following table to that the meter is functioning within the specified parameters. 2. Set the output of the calibrator to zero mA. 3. Connect the output of the calibrator to the low current input terminal (typically 200 mA) and the common terminal of the unit under test. Note: Do not exceed the maximum current rating of the meter. Only test for values the meter is capable of reading. 4. With reference to the table below, select the IUT current range and set the calibrator output to provide the corresponding IUT input current. that the display reading is within the limits shown. Step
Range
Input
Display
1
200?A
190?A
18.27 to 19.28
2
2mA
1.9mA
1.872 to 1.928
3
20mA
19mA
18.72 to 19.28
4
200mA 190mA 187.2 to 192.8
5. Disconnect the calibrator and change the current terminal on the IUT to the highest http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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Free Digital Multimeter Calibration Procedure
setting (typically 10 A) leaving the common input terminal connected. 6. Use the following table to that the meter is functioning within the specified parameters. Step Range Input
Display
1
10A
1A
0.97 to 1.03
2
10A
5A
4.87 to 5.13
3
10A
9A
8.77 to 9.23
LOGIC TEST
Use this procedure to test weather the logic function is indicating the correct state. 1. Set the IUT to the logic test mode and insert the test leads into the V/ohm and common terminals. 2. Short the leads together and that the meter indicates a low logic state. 3. Set the calibrator to 0.400 VDC and connect the meter to the output terminals. that the meter indicates a low logic state. 4. Set the calibrator to 3.500 VDC and that the IUT indicates a high logic state. FREQUENCY TEST
1. Connect an oscilloscope to a function generator to measure AC sine waves. 2. Set the function generator to output 10 VAC and use the oscilloscope to set the frequencies from the following table. http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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3. Connect the IUT leads to the V/ohm and common terminals on the IUT and to the ground and output of the function generator. 4. the meter is displaying proper results from the table. Step Range
Input
Display
1
Hz
60 Hz @ 10V
59.4 to 60.6
2
Hz
1 kHz @ 10V
.990 to 1.010k
3
Hz
1 MHz @ 10V .990 to 1.010M
CAPACITANCE TEST
1. Set the IUT to measure capacitance, insert the test leads into the V/ohm and common test terminals. 2. Connect the meter to the capacitance test fixture and use the following table to determine the ability of the IUT. Step
Range
Input
Display
1
Capacitance
10 micro F
9.85 to 10.15
2
Capacitance
1 micro F
.985 to 1.015
3
Capacitance 100 micro F 98.5 to 101.5
DIODE TEST
1. Set the IUT to the diode check function and connect the test leads to the V/ohm http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
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Free Digital Multimeter Calibration Procedure
and common terminals. 2. Connect the test leads to the diode test fixture and follow the steps in the proceeding table to diode test operation. Step
Range
Setup
Polarity
Display
Tone
1
Diode Check
Short
N/A
.000 to .001
Yes
2
Diode Check
Si
Forward .800 to .600
Yes
3
Diode Check
Si
Reverse
No
4
Diode Check
Ge
Forward .300 to .500
Yes
5
Diode Check
Ge
Reverse
No
1.
1.
Note: Some meters are not designed to emit a tone.
Reason for Reissue Revision A First Release
Software
Software
Get Help
Forum
About
Us
Calibration Control
Printers
Help Pages & Videos
Forum Home
About Us
Us
Scanner
Remote
Calibration Control
Our Customers
Email Sales
Version History
Minimum Requirements
Online Meeting
Important Links
Feature List
PDF Brochure
OnSite Services
Site Map
Desktop
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
11/12
23/01/2016
Free Digital Multimeter Calibration Procedure
Pricing
PDF Manual
Multi Setup
Copyright © 1992 to 2016 Ape Software all rights reserved | Home |
http://www.apesoftware.com/calibrationprocedures/digitalmultimeter.aspx
Privacy Policy
Phone: 5594406052
12/12
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