WELD UNIT METER CERTIFICATION PROCEDURE

1. Voltage readings shall be taken at the output studs of unit under test. Voltage readings shall be

taken at open circuit

A. Voltmeter Certification

voltage with the Fluke 45.

2. Verify that welder voltmeter reading is within + or - 10% of standard meter reading. (If

adjustment is required, see

Technical manual for each make and model.)

3. Take readings at 10 volt intervals from min to max open circuit voltage.

4. Record data on a Calibration Data Sheet

1. Put certified shunt in series with Miller Load Bank #043329 and the output of unit under test.

B. Ammeter Certification

2. Monitor output of shunt with Fluke 45.

3. Verify that welder ammeter reading is within + or - 10% of standard meter reading. (If

adjustment is required, see technical manual for each make and model.

4. Take readings at 100 amp intervals from 100 amps to max amperage output of unit under test.

5. Record data on a Certification Calibration Data Sheet

1. Fill out Certificate of Calibration form.

C. Certificate

2. Fill out a Certification sticker. Place sticker on front panel of unit under test.

3. Customer receives the original Certificate of Calibration.

4. File a copy of the Certificate, along with a copy of the order inquiry, and all of the completed

data sheets.

Example

CALIBRATION DATA SHEET

Make: Miller

Model: CP-302

Serial Number: HH0123456

METER: Current X (AC DC X ) or Voltage

RANGE: Low High Not Applicable (N/A) X

Settings %Error Actual Measurement Measurement %Error

SCALE Primary Standard WELDING MACHINE METER

N/A N/A 289.7 300 -3.4

N/A N/A 194.4 200 -2.8

N/A N/A 101.6 100 +1.6

Technician Name

Date

Signed:

Date:

Example

Certificate Of Calibration

Miller Model No. CP-302

Miller Part No. 654321

Serial No. HH0123456

P.O. No. MW636

Certificate No. 1

(Your company Name Here) does hereby certify the above instrument was calibrated

against standards maintained by (Your company Name Here) and meets or exceeds

specifications.The accuracy of these standards is directly traceable to the National Institute of

Standards and Technology.

Calibration Date:

Temperature:

Humidity:

Certified By:

Recommended

Recalibration Date:

Technician Name

Date

Applicable N.I.S.T. standards & dates

Fluke 45

S/N 000000 Cal. 10/1/99

T & M Shunt

S/N 00000 Cal. 10/1/99

Your Company Logo Here

WIRE FEED METER CERTIFICATION PROCEDURE

A. Inch Per Minute (IPM) Meter Certification

1. Disengage drive rolls so wire will not feed. Actuate the drive rolls by pressing the “jog” switch.

2. Use a digital tachometer to determine the RPM of the drive roll.

3. Take readings at 200 IPM intervals from 700 to 100 IPM.

4. Multiply the RPM by the nominal circumference of the drive roll (5.128) to determine Inches Per

Minute.

5. Verify that the IPM Meter is within +/- 5% of the primary standard meter reading. If

adjustment is required, see the Technical Manual.

6. Record data on a Calibration Data Sheet

B. Certificate

1. Fill out Certificate of Calibration form

2. Fill out a Certification sticker. Place sticker on front panel of unit under test.

3. Customer receives the original Certificate of Calibration.

4. File a copy of the Certificate, along with a copy of the order inquiry, and all of the completed

data sheets.

CALIBRATION DATA SHEET

Example

Make: Model:Miller S-62 Feeder

Serial Number: HJ234567

METER: Current (AC DC )

Voltage (AC DC )

IPM X

RPM Measurement Multiplier* IPM IPM % Error

Primary Standard Wire Feed Meter (under test)

135 5.128 692.3 700 1.1

96 5.128 492.3 500 1.5

58 5.128 297.4 300 0.9

19 5.128 97.4 100 2.6

*Nominal circumference of drive roll.

Signed: Technician

Date:

Example

Certificate of Calibration

Miller Model No. S-62 Feeder

Miller Part No. 765432

Serial No. HJ234567

P.O. No. MW636

Certificate No. 1

(Your company Name Here) does hereby certify the above instrument was calibrated

against standards maintained by (Your company Name Here) and meets or exceeds

specifications.The accuracy of these standards is directly traceable to the National Institute of

Standards and Technology.

Calibration Date:

Temperature:

Humidity:

Certified By:

Recommended

Recalibration Date:

1/12/2001

72°F

49% R.H.

Joe Technician

1/12/2002

Applicable N.I.S.T. standards & dates

Extech Contact/Photo Tachometer

S/N 000000 Cal. 10/1/00

Your Company Logo Here