CLAMP-ON METERS THIS PUBLICATION SUPERSEDES NAVAIR 17-20AQ-32 DATED 1 OCTOBER 2009

Transcription

1 TECHNICAL MANUAL AQ-32 INSTRUMENT CALIBRATION PROCEDURE CLAMP-ON METERS THIS PUBLICATION SUPERSEDES DATED 1 OCTOBER 2009 DISTRIBUTION STATEMENT C. DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR CONTRACTORS TO PROTECT PUBLICATIONS REQUIRED FOR OFFICIAL USE OR FOR ADMINISTRATIVE OR OPERATIONAL PURPOSES ONLY. OTHER REQUESTS FOR THIS DOCUMENT SHALL BE REFERRED TO MEASUREMENT SCIENCE DEPARTMENT, CORONA DIVISION, NAVAL SURFACE WARFARE CENTER, P.O. BOX 5000, CORONA, CA AQ-32 DESTRUCTION NOTICE - FOR UNCLASSIFIED, LIMITED DOCUMENTS, DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENT. PUBLISHED BY DIRECTION OF COMMANDER NAVAL AIR SYSTEMS COMMAND 1 MAY 2012

2 LIST OF EFFECTIVE PAGES The purpose of this list is to identify the pages in this document affected by any technical content changes made since the previous release of the document. NOTE: On a revised page, with the exception of the Title, the A, and the i pages, the technical changes are indicated by a vertical line in the outer margin of the page. Page No. ** Revision* Page No. ** Revision* Title A 0 A-1 to A-5 0 i 0 B-1 to B to to to to to to to Page No. ** Revision* 71 0 *Zero in this column indicates an original page. R in this column indicates a revised page. **All pages not listed are blank pages. A

3 TABLE OF CONTENTS Section Page 1 Introduction and Description Equipment Requirements Preliminary Operations Calibration Process Alternating Voltage Test Direct Voltage Tests Alternating Current Test Direct Current Test Ohmmeter Test... 9 Navy Calibration Checklist Appendix A: Representative Test Instruments... A-1 Appendix B: Current Coils and Test Points... B-1 ILLUSTRATIONS Figure Page 1 Current Test Configuration Using a Current Shunt Test Configuration Using an Alternating Current Source with Current Transformer... 7 TABLES Table Page 1 Calibration Description Equipment Requirements... 2 i

4 SECTION 1 INTRODUCTION AND DESCRIPTION 1.1 This procedure describes the calibration of the Clamp-On Meters. The Clamp-On Meters may also have voltages/currents and resistance measuring capabilities that are covered by this procedure. Instruments that can be calibrated by this procedure include, but are not limited to, the items listed in Appendix A. The instrument being calibrated is referred to herein as the TI (Test Instrument). 1.2 All comments concerning this procedure should be directed to the Measurement Science Department, Corona Division, Naval Surface Warfare Center, P.O. Box 5000, Corona, CA This procedure includes tests of essential performance parameters only. Any malfunction noticed during calibration, whether specifically tested for or not, should be corrected. NOTE For AC current frequencies >400 Hz, the Weston 327 Type 2 transformer and Ammeter should not be used. The current shunt and digital multimeter (frequency range from 50 Hz to 1 khz) are intended as an alternate to the current transformer and ammeter (frequency range from 25 to 500 Hz). The Altec Lansing 1570BN was retained as a listed standard since the 1570BN will tolerate loads as small as 0.8. If the 1590E functions correctly, it is also acceptable (see Appendix B). There are also compliance voltage limitations of the 5700AAN and 5725A (or substitutes). The AC current waveform is sine wave. It is acceptable to change the test points for the higher value currents at frequencies of 400 Hz or greater due to compliance voltage limitations. Refer to Appendix B for expanded information. TI Characteristics Alternating voltage Direct voltage Alternating current Direct current Resistance Table 1. Calibration Description Performance Specifications Range: 0 to 1000 V ac Tolerance: ±1% iv or greater Range: 0 to 1000 V dc Tolerance: ±0.8% iv or greater Range: 0 to Hz, 0 to Hz Tolerance: ±1% iv or greater Range: 0 to 500 A Tolerance: ±2% iv or greater Range: 0 to 2000 Tolerance: ±1% iv or greater Test Method Voltage is applied, adjusted to the desired TI indication, and measured. Voltage is applied, adjusted to the desired TI indication, and measured. Comparison with a metered current source, if required, and using a multiturn coil as a current multiplier. Comparison with a metered current source, if required, and using a multiturn coil as a current multiplier. Measurement of a decade resistor. 1

5 SECTION 2 EQUIPMENT REQUIREMENTS NOTES Minimum use specifications are the principal parameters required for performance of the calibration, and are included to assist in the selection of alternate equipment, which may be used at the discretion of the using laboratory. Satisfactory performance of alternate items shall be verified prior to use. All applicable equipment must bear evidence of current calibration. The instruments utilized in this procedure were selected from those known to be available at Navy calibration facilities, and the listing by make or model number carries no implication of preference, recommendation, or approval for use by other agencies. It is recognized that equivalent equipment produced by other manufacturers may be capable of equally satisfactory performance in this procedure. Item Table 2. Equipment Requirements Minimum Use Specifications 2.1 Alternating voltage source Range: 0 to 1000 V ac Uncertainty: ±0.25% Frequency: 60 and 400 Hz 2.2 Direct voltage source Range: 0 to 1000 V dc Uncertainty: ±0.2% iv 2.3 Alternating current source Range: 0 to 10 A minimum Uncertainty: ±0.25% iv Frequency: 50, 60, 400 Hz, 1 khz 2.4 Direct current source Range: 0 to 10 A minimum Uncertainty: ±0.5% iv 2.5 Resistance standard Range: 0 to 2000 Uncertainty: ±0.25% iv 2.6 Current multiplying coil (may be locally fabricated or purchased) To fabricate current-multiplying coil with local supply wire, possible sizes and current ratings are: 14 gauge wire to 20A 10 gauge wire to 35A 8 gauge wire to 50A 4 gauge wire to 100A 2.7 Clamp To connect cables together with minimum resistance 2.8 Digital multimeter (DMM) Voltage range: 0 to 2 V ac Uncertainty: 0.25% iv Frequency range: 50 Hz to 1 khz 2.9 Current shunt Current range: 0 to 10 A minimum Uncertainty: 0.25% iv Frequency range: DC, 50 Hz, 60 Hz, 1 khz Calibration Equipment Fluke 5700AAN Fluke 5700AAN Fluke 5700AAN with 5725A; or Altec 1570BN with Weston and Weston 327 Type 2; or Hewlett-Packard 34401A with Electrical Instrument Service SR15 Fluke 5700AAN with 5725A Fluke 5700AAN; or QuadTech ; or GenRad 1433W Local supply for wire or Fluke 5500A/COIL (50 turn coil) Local supply Hewlett-Packard 34401A Electrical Instrument Service SR15 2

6 SECTION 3 PRELIMINARY OPERATIONS 3.1 Select the appropriate equipment for the measurement system to be used. 3.2 Set all auxiliary equipment controls for minimum output to avoid damage to the equipment and so that dangerous voltages will not be present on the output terminal when the power switches are turned on. 3.3 Connect all auxiliary equipment to the appropriate power source. 3.4 Turn all power switches on, and allow the equipment to warm up. 3.5 If a checklist for the TI is not provided, select the calibration points as follows (exceptions are allowed for alternating current): Select graduations on suitable alternating and direct voltage ranges as calibration points. If the TI has current capability, select three graduations on suitable alternating and direct current ranges as calibration points, ensuring that all test values are less than or equal to the current limits listed in Section If the scales are linear for voltage, current or resistance, the cardinal graduations may be used. If the scales are non-linear, select graduations at deflections of approximately one-third and two-thirds of fullscale, and at fullscale, ensuring that test points for current values are less than or equal to the current limits listed in Section Ensure that the TI meter is mechanically zeroed. 3.7 Ensure that the TI jaws are clean and free of foreign substance and that they close properly. 3

7 SECTION 4 CALIBRATION PROCESS WARNINGS THIS PROCEDURE INVOLVES VOLTAGES THAT ARE HAZARDOUS TO PERSONNEL. USE EXTREME CAUTION. THIS PROCEDURE INVOLVES CURRENTS THAT ARE HAZARDOUS TO PERSONNEL. USE EXTREME CAUTION. NOTE Unless otherwise specified, verify the results of each test and take corrective action whenever the test requirement is not met, before proceeding. 4.1 ALTERNATING VOLTAGE TEST Set the TI selector switch for alternating voltage measurement Set the alternating voltage source (item 2.1) controls for 60 or 400 Hz alternating voltage output as required for the TI If applicable, perform the alternating voltage source meter electrical zero adjustment For each alternating voltage calibration point selected, perform a measurement as follows: Connect the TI to the alternating voltage source using the appropriate terminals If applicable, set the TI range switch to the appropriate voltage range Set the alternating voltage source controls to the voltage value selected as the calibration point Adjust the alternating voltage source output controls for the required TI nominal value selected as the calibration point. NOTE If a meter calibrator having a percent error meter is being used and the error exceeds its range, adjust the calibrator controls for the exact calibration point and verify that the TI indication is within the tolerance limits Verify that the alternating voltage source indicates within the tolerance limits for the selected calibration point. WARNING REDUCE THE ALTERNATING VOLTAGE SOURCE OUTPUT TO MINIMUM BEFORE CHANGING TI CONNECTIONS OR SWITCHING TO A LOWER RANGE Adjust the alternating voltage source controls for minimum output Unless other measurements are to be performed, skip to step

8 4.2 DIRECT VOLTAGE TESTS Set the TI selector switch for direct voltage measurements Set the direct voltage source (item 2.2) controls for direct voltage output If applicable, perform the direct voltage source meter electrical zero adjustment. If applicable, perform DC zero adjustments on the TI Perform a measurement as follows for each direct voltage calibration point selected: Connect the TI to the direct voltage source using the appropriate terminals If applicable, set the TI range switch to the appropriate voltage range Set the direct voltage source controls to the voltage value selected as the calibration point Adjust the direct voltage source output controls for the required TI nominal value selected as the calibration point. NOTE If a meter calibrator having a percent error meter is being used and the error exceeds its range, adjust the calibrator controls for the exact calibration point and verify that the TI indication is within the tolerance limits Verify that the direct voltage source indicates within the tolerance limits for the selected calibration point. WARNING REDUCE THE DIRECT VOLTAGE SOURCE OUTPUT TO MINIMUM BEFORE CHANGING TI CONNECTIONS, OR SWITCHING TO A LOWER RANGE Adjust the direct voltage source controls for minimum output Unless other measurements are to be performed, skip to step ALTERNATING CURRENT TEST Set the TI selector switch for alternating current measurements. NOTE The technician is given the choice of 3 methods. The first method uses a single wire. The second method uses the Fluke 5500A/COIL (50 turn current coil). The third method allows the technician to construct a multiturn coil. After the wire (or coil) is chosen, the technician is told to size the current for the test points (the 50 turn coil or the constructed coil are current multipliers, the single wire is not). The 3 methods are equivalent. The calibration technician is free to use whatever method is convenient for the test point desired. 5

9 NOTES The technician may either construct a multi turn coil (see Appendix B) as item 2.6 or use the Fluke 5500A/COIL (a 50 turn coil listed as an accessory to the Fluke 5500A calibrator). It is recognized that there will be compliance voltage limitations when the 5700AAN and the 5725A are used as the current source. It is anticipated that the compliance voltage limitations will be more pronounced at the 400 Hz and higher frequencies for larger currents. For these reasons, the calibration technician is allowed to modify the current check points when compliance voltage is a problem. Refer to Appendix B for expanded instructions. The current shunt (item 2.9) and the digital multimeter (item 2.8) may be used in place of the 327 Type 2 current transformer and the ammeter. In Figure 2, the primary of the 327 Type 2 transformer is connected in series with the amplifier output and the coil. The shunt current terminals are to be connected in place of the primary terminals of the 327 Type 2 current transformer. The shunt output voltage terminals are to be connected to the voltage inputs of the multimeter. Set the multimeter to measure V ac. Figure 2 shows the configuration using the 327 Type 2 transformer and ammeter If applicable, perform the alternating current source (item 2.3) meter electrical zero adjustment. Connect the equipment, except the coil, as shown in Figure 1 or Figure For the TI, find the ac current ranges from Appendix A or the checklist, if it exists. NOTE If using Appendix A to find the test points, it is only necessary to use 3 test points for each current range at just one of the test frequencies used. For testing at the other frequencies, one test point on each range is sufficient. For testing at 50 Hz or 60 Hz, the 3 test points should be spread across each current range (suggested points are at 20 to 30% of range, 40 to 60% or range, and 90 to 100% of range). At 400 Hz or higher, the test point (or points) in each of the current ranges should be above 50% of the range if possible If compliance voltage problems occur (particularly with the 5700AAN and 5725A) when testing over 100 Hz, reduce the higher current test point magnitudes until the compliance voltage problem ceases. In this case, the SPECIAL CALIBRATION label is not necessary because the current ranges at the 60 Hz or 50 Hz frequencies were tested If the TI current test point (or range) is less than the output range of item 2.3 or item 2.4 standards, a single wire (through the center of the TI jaw area) may be used. If the TI current range is greater than the output range of item 2.3 or item 2.4 standards, a multiturn coil must be used. The multiturn coil may be either the Fluke 5500A/COIL or a coil constructed as described in Appendix B. 2.3 OR 2.4 CURRENT SOURCE 2.8 DMM 2.9 CURRENT SHUNT COIL TI JAWS MULTITURN COIL TI Figure 1. Current Test Configuration Using a Current Shunt 6

10 OSCILLATOR (200 CD) AMPLIFIER (1570 BN) CURRENT TRANSFORMER (327 TYPE 2) AC/DC AMMETER ( ) 2.3 ALTERNATING CURRENT SOURCE 100 A ± 50 A SEC 20 A 10 A NOTE THE WESTON 327 TYPE 2 CURRENT TRANSFORMER OUTPUT IS 5 A WITH MAXIMUM RATED INPUT AT ANY TAP. COIL TI Figure 2. Test Configuration Using an Alternating Current Source with Current Transformer Size the coil current, connect the coil or wire to the TI, and perform the TI calibration test points as follows: If a single wire is being used, then the wire current is the same as the current for the TI test points. Use the appropriate size of insulated wire (item 2.6) needed for the current used (through the single wire). Then connect the ends of the single wire as shown in Figure 1 or Figure 2. One end will be to the current source and the other end will be to the primary of the current transformer if Figure 2 is used. Test Configuration shown in Figure 1 is used if a current shunt is used as the standard. NOTE The current through the Fluke 5500A/COIL coil is not the same as the TI test value. Divide each TI test point current used by 50 to get each current through the 5500A/COIL If the Fluke 5500A/COIL is to be used, connect the primary of the Fluke 5500A/COIL to the current source If constructing a multiturn coil, read Appendix B. Connect the ends of the multiturn coil as shown in Figure 1 or Figure 2. The number of complete turns in the coil does not have to be the same for all the test points. Several coils with different numbers of turns may be used. Size the coil current for each test point For each TI alternating current calibration point (test point) selected, perform a measurement as follows: Set the TI range switch to the appropriate current range, and clamp the TI jaws around one side of the coil (or around the wire with the wire in the center area enclosed by the jaws) If the test configuration in Figure 2 is used, adjust the oscillator frequency controls to the frequency required for the TI. Set the oscillator amplitude controls for a 0.85 V indication on the amplifier panel meter (if the 1570BN is used). If the meter calibrator and amplifier are used, set the meter calibrator to the frequencies and amperages listed. 7

11 Adjust the current source or amplifier controls to obtain a TI indication at the calibration point Verify that the result is within the tolerance limits for the selected calibration point Adjust the current source controls for minimum output If the TI has AC current ranges that were not tested, indicate on an affixed SPECIAL CALIBRATION label, the current range not tested. For example, Not calibrated on 200 A ac range. 4.4 DIRECT CURRENT TEST CAUTION DO NOT APPLY DIRECT CURRENT TO THE WESTON 327 TYPE 2 TRANSFORMER Set the TI selector switch for direct current measurements If applicable, set the direct current source controls for direct current output If applicable, perform the direct current source meter electrical zero adjustment Select the equipment for the test method to be used For each direct current calibration point selected, perform a measurement as follows: If a direct current correction factor is marked on the TI, determine the corrected value for the current source by algebraically adding the direct current correction factor to the TI calibration point If the calibration point is within the range of the current source, use the appropriate size of insulated wire to make a single loop of wire, and connect the ends of the wire to the current source output terminals; if not within the range of the current source, connect the current multiplying coil to the current source output terminals. Observe the NOTE following NOTES To reduce hysteresis in the TI, press the TI trigger to open the jaws fully, and then release the trigger to allow the jaws to snap shut. Repeat this several times before each measurement. If the TI is produced by the Columbia Electric Mfg, demagnetize the jaws using an alternating current (10 amp max) with the equipment connected as shown in Figure 1 or Figure Set the TI range switch to the appropriate current range, and clamp the TI jaws around one side of the coil by allowing the TI jaws to snap shut Adjust the current source controls to obtain a TI indication at the calibration point Measure the output of the current source and multiply the value by the number of turns of wire in the coil. NOTE Some TIs are not capable of measuring direct current with the jaw position reversed. For TIs with this limitation, skip to step Without decreasing current, reverse the TI on the coil and allow the TI jaws to snap shut and repeat steps and Determine the average value for the two indications, and verify that the result is within the tolerance limits for the nominal or corrected nominal value. 8

12 Example: If the TI calibration point is 100 A dc and the TI correction factor is -2, the current source is adjusted for a TI indication of 100 A and the current source corrected nominal indication 98 A. The tolerance limits should be applied to the corrected nominal indication and not to the TI indication Adjust the current source controls for minimum output If the TI has ranges that were not tested at fullscale, indicate on an affixed SPECIAL CALIBRATION label, the highest current values tested. For example, Not calibrated above 600 A ac and/or 500 A dc If the TI was submitted with a resistance probe, perform Section 4.5. If no probe is supplied, skip to step and state in the SPECIAL CALIBRATION statement, The resistance function was not tested (NA the checklist steps). 4.5 OHMMETER TEST Perform a mid-scale measurement for each of the TI resistance ranges as follows: Set the TI controls to the appropriate resistance range Set the resistance standard (item 2.5) to the nominal value of the resistance to be measured Connect the TI test leads together, and zero the meter Connect the TI test leads to the applicable resistance standard and verify that the TI indication obtained is within tolerance Unless other instruments are to be tested, turn all power switches off, and disconnect the equipment If the TI has interchangeable scale range plug ins, or a resistance probe, affix a SPECIAL CALIBRATION label on the TI, and list the plug in units, or resistance probe by scale range and serial numbers, which can be used with the TI. Example: THIS INSTRUMENT TO BE USED ONLY WITH: SCALE RANGE 0-100, SN SCALE RANGE 0-200, SN SCALE RANGE 0-400, SN SCALE RANGE , SN RESISTANCE PROBE, SN NOTE Only those plug in units calibrated in the TI can be listed for use by the TI Affix a SPECIAL CALIBRATION label to each of the scale range plug in units calibrated with the TI. Example: THIS INSTRUMENT TO BE USED ONLY WITH: (mark TIs serial #) Unless other measurements are to be performed, turn all power switches to off or standby and disconnect the equipment from the TI. (10 blank) 9

13 TEST INST (S) Amprobe Instrument Co RS-3 Clamp-On Volt Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V rang 300 ±3% or 291 to V rang 600 ±3% or 582 to Alternating Current Test (A) (A) A range 6.00 ±3% or 5.82 to ±3.6% or 4.82 to ±4.5% or 3.82 to ±6% or 2.82 to ±9% or 1.82 to ±18% or 0.82 to A range ±3% or to A range 40.0 ±3% or 38.8 to A range 100 ±3% or 97 to A range 300 ±3% or 291 to Ohmmeter Test Zero meter -- ck ( ) NA ±1 Div on Voltage Scale 32 Page 1 of 1 (12 blank) 11

14 TEST INST (S) Amprobe Instrument ACDC600A Digital Clamp-On Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range to to to A range to Test frequency 400 Hz (A) (A) A range to to Direct Current Test A range (A) (A) to to to to to Page 1 of 1 (14 blank) 13

15 TEST INST (S) Amprobe Instrument ACDC620T True RMS Clamp-On Multimeter 4.1 Alternating Voltage Test V ac 60 Hz (V ac) (V ac) to to to to to to V ac 400 Hz (V ac) (V ac) to to to to to to Direct Voltage Voltage range 0 to 1000 V dc (V dc) (V dc) to to to to to to 1013 Page 1 of 3 15

16 TEST INST (S) Amprobe Instrument ACDC620T True RMS Clamp-On Multimeter 4.3 Alternating Current Test Alternating current range 0 to 60 Hz (A ac) (A ac) to to to to Alternating current range 0 to 400 Hz (A ac) (A ac) to to to to Alternating current range 60 Hz (A ac) (A ac) to to to to 1030 Alternating current range 400 Hz (A ac) (A ac) to to to to Direct Current Test Direct current range 0 to 400 A dc (A dc) (A dc) to to to to Page 2 of 3 16

17 TEST INST (S) Amprobe Instrument ACDC620T True RMS Clamp-On Multimeter Range 400 to 1000 A dc (A dc) (A dc) to to to to Ohmmeter Test Zero meter check -- ck ( ) NA Resistance range 400 ( ) ( ) to to to Resistance range to to to 1013 Page 3 of 3 (18 blank) 17

18 TEST INST(S) General Electric AK-1 Clamp-On Volt Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 600 ±3% or 582 to Alternating Current Test (A) (A) A range ±3% or to ±3.8% or to ±5% or 8.55 to ±7.5% or 5.55 to ±15% or 2.55 to A range 60.0 ±3% or 58.2 to A range ±3% or to A 60 Hz 600 ±3% or 582 to A 400 Hz 300 ±3% or 282 to 318 Page 1 of 1 (20 blank) 19

19 TEST INST(S) General Electric AK-4 and AAAA1 Clamp-On Volt Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 300 ±3% or 291 to ±3% or 727 to Alternating Current Test (A) A range 10.0 ±3% or 9.7 to ±3.8% or 7.7 to ±5% or 5.7 to ±7.5% or 3.7 to ±15% or 1.7 to A range 30.0 ±3% or 29.1 to ±3% or 97 to ±3% or 291 to A 60 Hz 600 ±3% or 576 to A 400 Hz 300 ±3% or 276 to 324 Page 1 of 1 (22 blank) 21

20 TEST INST(S) Weston Instruments 633 Type VA-1 or TYPE A-1 Clamp-On Volt Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 300 ±3% or 291 to ±3% or 582 to Alternating Current Test (A) (A) A range 10.0 ±3% or 9.7 to ±3.8% or 7.7 to ±5% or 5.7 to ±7.5% or 3.7 to ±15% or 1.7 to A range 25.0 ±3% or 24.2 to ±3% or 97 to ±3% or 242 to A 60 Hz 600 ±5% or 570 to A 400 Hz 300 ±10% or 270 to 330 Page 1 of 1 (24 blank) 23

21 TEST INST(S) Weston Instruments 749 Clamp-On Volt Ammeter 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test 60 Hz tests (V) (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 300 ±3% or 291 to ±3% or 582 to Alternating Current Test (A) (A) A range 6.00 ±3% or 5.82 to ±3.6% or 4.82 to ±4.5% or 3.82 to ±6% or 2.82 to ±9% or 1.82 to ±18% or 0.82 to A range ±3% or to ±3% or 29.1 to ±3% or 58.2 to ±3% or to ±3% or 291 to 309 Page 1 of 2 25

22 TEST INST(S) Weston Instruments 749 Clamp-On Volt Ammeter 4.1 Alternating Voltage Test 400 Hz tests (V) (V) V range 150 ±5% or to ±6% or to ±7.5% or 92.5 to ±10% or 67.5 to ±15% or 42.5 to ±30% or 17.5 to V range 300 ±5% or 285 to ±5% or 570 to Alternating Current Test (A) (A) A range 6.00 ±5% or 5.70 to ±6% or 4.70 to ±7.5% or 3.70 to ±10% or 2.70 to ±15% or 1.70 to ±30% or 0.70 to A range ±5% or to ±5% or 28.5 to ±5% or 57.0 to ±5% or to ±5% or 285 to 315 Page 2 of 2 26

23 TEST INST (S) Simpson Co 150, Amp-Clamp 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test if 0 to 2.5 V ac range used (A) (A) A range 5.00 ±3% or 4.85 to ±3% or 9.7 to ±3% or to ±3% or 48.5 to ±3% or 97 to ±3% or to Alternating Current Test if 0 to 3 V ac range used (A) (A) A range 6.00 ±3% or 5.82 to ±3% or to ±3% or 29.1 to ±3% or 58.2 to ±3% or to ±3% or 291 to 309 NOTE This TI can be used with Simpson volt-ohmmeter having a 0 to 2.5 V or 0 to 3 V range. If used on a volt-ohmmeter with a 2.5 V scale, range goes to 250 A; if used on 3 V scale, range goes to 300 A. Page 1 of 1 (28 blank) 27

24 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 3.7 Jaws clean -- ck ( ) NA NOTE: The 0-600/800/1000 ranges of Types C and D are calibrated AC or DC, not both. 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range 600 ±8.3% or 550 to ±10% or 450 to A range 600 ±6.7% or 560 to ±8% or 460 to ±10% or 360 to A range 600 ±5% or 570 to ±6% or 470 to ±7.5% or 370 to ±10% or 270 to ±15% or 170 to A 400 Hz 300 ±12% or 264 to Direct Current Test A range (A) (A) 500 ±5% fs A range (A) (A) 500 ±5% fs A range (A) (A) 500 ±5% fs Page 1 of 7 29

25 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 3.6 Adj mech zero -- ck ( ) NA 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range 500 ±2% or 490 to ±2.5% or 390 to ±3.33% or 290 to ±5.0% or 190 to 210 Test frequency 400 Hz (A) (A) A range 300 ±5% or 285 to ±7.5% or 185 to Direct Current Test A range (A) (A) 500 ±5% fs Alternating Current Test Test frequency 60 Hz (A) (A) A range 400 ±2% or 392 to ±2.67% or 292 to ±4% or 192 to 208 Test frequency 400 Hz (A) (A) A range 300 ±4% or 288 to ±6.0% or 188 to 212 Page 2 of 7 30

26 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 4.4 Direct Current Test A range (A) (A) 400 ±5% fs Alternating Current Test Test frequency 60 Hz (A) (A) A range 300 ±2% or 294 to ±2.4% or 244 to ±3% or 194 to ±4% or 144 to ±6% or 94 to 106 Test frequency 400 Hz (A) (A) A range 300 ±3% or 291 to ±3.6% or 241 to ±4.5% or 191 to ±6.0% or 141 to ±9.0% or 91 to 109 Test frequency 60 Hz (A) (A) A range 150 ±2% or 147 to ±2.5% or 117 to ±3.3% or 87 to ±5.0% or 57 to 63 Test frequency 400 Hz (A) (A) A range ±3% or to ±3.8% or to ±5.0% or 85.5 to ±7.0% or 55.5 to 63.5 Page 3 of 7 31

27 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 4.4 Direct Current Test A range (A) (A) 150 ±5% fs Alternating Current Test Test frequency 60 Hz (A) (A) A range 100 ±2% or 98 to ±2.5% or 78 to ±3.3% or 58 to ±5.0% or 38 to 42 Test frequency 400 Hz (A) (A) A range 100 ±3% or 97 to ±3.8% or 77 to ±5.0% or 57 to ±7.5% or 37 to Direct Current Test A range (A) (A) 300 ±5% fs Page 4 of 7 32

28 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range 200 ±2% or 196 to ±2.67% or 146 to ±4.0% or 96 to 104 Test frequency 400 Hz (A) (A) A range 200 ±3% or 194 to ±4% or 144 to ±6.0% or 94 to Direct Current Test A range (A) (A) 200 ±5% fs A range (A) (A) 100 ±5% fs Page 5 of 7 33

29 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range 75.0 ±2% or 73.5 to ±2.5% or 58.5 to ±3.75% or 38.5 to ±7.5% or 18.5 to 21.5 Test frequency 400 Hz (A) (A) A range 75.0 ±3% or 72.8 to ±3.8% or 57.8 to ±5.6% or 37.8 to ±11.3% or 17.8 to Direct Current Test A range (A) (A) 75 ±5% fs Page 6 of 7 34

30 TEST INST(S) Columbia Electric AX, D, and C AC/DC Clamp-On Ammeters 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test Test frequency 60 Hz (A) (A) A range 50 ±2% or 49 to ±2.5 % or 39 to ±3.3 % or 29 to ±5.0 % or 19 to 21 Test frequency 400 Hz (A) (A) A range 50.0 ±3% or 48.5 to ±3.8% or 38.5 to ±5.0 % or 28.5 to ±7.5 % or 18.5 to Direct Current Test A range (A) (A) 50 ±5% fs Page 7 of 7 (36 blank) 35

31 TEST INST(S) Military MH or and Columbia Electric DP Clamp-On Volt Ammeters 3.7 Jaws clean -- ck ( ) NA 4.4 Direct Current Test (A) (A) ±5% of fullscale A ranges to to to to A range to to to to A range to to to A range to to to 300 Page 1 of 1 (38 blank) 37

32 TEST INST(S) Amprobe Instrument RS-300 Clamp On Volt Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 300 ±3% or 291 to ±3% or 582 to Alternating Current Test (A) (A) A range 6.00 ±3% or 5.82 to ±3.6% or 4.82 to ±4.5% or 3.92 to ±6% or 2.82 to ±9% or 1.82 to ±18% or 0.82 to A range ±3% or to ±3% or 38.8 to ±3% or 97 to ±3% or 291 to 309 Page 1 of 1 (40 blank) 39

33 TEST INST(S) Weston Instruments 633 Type A-1 Clamp-On Ammeter 3.7 Jaws clean -- ck ( ) NA 4.3 Alternating Current Test (A) (A) A range 10.0 ±3% or 9.7 to ±3.8% or 7.7 to ±5% or 5.7 to ±7.5% or 3.7 to ±15% or 1.7 to A range ±3% or to ±3% or 48.5 to ±3% or 97 to ±3% or to A 60 Hz 500 ±3% or 485 to A 400 Hz 300 ±5% or 285 to 315 Page 1 of 1 (42 blank) 41

34 TEST INST(S) Pyramid Instrument 300 Clamp-On Volt Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range ±3% or to ±3.6% or to ±4.5% or 95.5 to ±6% or 70.5 to ±9% or 45.5 to ±18% or 20.5 to V range 300 ±3% or 291 to ±3% or 582 to Alternating Current Test (A) (A) A range 6.00 ±3% or 5.82 to ±3.6% or 4.82 to ±4.5% or 3.82 to ±6% or 2.82 to ±9% or 1.82 to ±18% or 0.82 to A range ±3% or to ±3.6% or to ±4.5% or 9.55 to ±6% or 7.05 to ±9% or 4.55 to ±18% or 2.05 to A range 30.0 ±3% or 29.1 to ±3% or 58.2 to ±3% or to ±3% or 291 to 309 Page 1 of 1 (44 blank) 43

35 TEST INST(S) Weston Instrument 633 Type A-2, 633 Type A Jaws clean -- ck ( ) NA 4.3 Alternating Current Test (A) (A) A range 100 ±3% or 97 to ±3.8% or 77 to ±5% or 57 to ±7.5% or 37 to ±15% or 17 to A range ±3% or to ±3% or 48.5 to ±3% or 97 to ±3% or to ±3% or 485 to 515 Page 1 of 1 (46 blank) 45

36 TEST INST(S) A.W. Sperry Instruments SPR-300 plus AC Volt Ohm Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test Test frequency: 60 Hz -- ck ( ) NA Ranges (V ac) (V ac) V ac to to to to to to V ac to to Alternating Current Test Test frequency: 60 Hz Ranges (A ac) (A ac) A ac to to to to to to A ac to to to to Ohmmeter Test Zero meter -- ck ( ) NA mid scale 25 ±3% of arc length or ±1/16 Page 1 of 1 (48 blank) 47

37 TEST INST(S) A.W. Sperry Instruments SPR-300 AC Volt Ohm Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test Test frequency 60 Hz -- ck ( ) NA Ranges (V ac) (V ac) V ac to to to to to to V ac to to Alternating Current Test Test frequency 60 Hz Ranges (A ac) (A ac) A ac to to to to to to A ac to to to to Ohmmeter Test Zero meter -- ck ( ) NA mid scale 25 ±3% of arc length or ±1/16 Page 1 of 1 (50 blank) 49

38 TEST INST(S) A.W. Sperry Instruments DSA-2007 Clamp-on Volt Ohm Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range 60 Hz to to to V range 60 Hz to V range 400 Hz to to to V range 400 Hz to Alternating Current Test (A) (A) A range 60 Hz to to to A range 60 Hz to A range 400 Hz to to to A range 400 Hz to Ohmmeter Test Zero meter -- ck ( ) NA ( ) ( ) range to to 193 Page 1 of 1 (52 blank) 51

39 TEST INST (S) Sperry Instruments DSA-2009 Volt-Ohm-Ammeter 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V) (V) V range 60 Hz to to to V range 60 Hz to V range 400 Hz to to to V range 400 Hz to Direct Voltage Voltage ranges (V dc) (V dc) Range 20 V dc to to Range 200 V dc to to to to Voltage range 200 to 1000 V dc (V dc) (V dc) to to to to Alternating Current Test (A) (A) A range 60 Hz to to to A range 60 Hz to to to 1018 Page 1 of 2 53

40 TEST INST (S) Sperry Instruments DSA-2009 Volt-Ohm-Ammeter (A) (A) A range 60 Hz to A range 400 Hz to to to A range 400 Hz to to to to to Direct Current Test Direct current range (A dc) (A dc) 0 to 200 A dc to to to to to 2000 A dc to to to to to Ohmmeter Test Zero meter check -- ck ( ) NA Resistance range 200 ( ) ( ) to to Resistance range to to to 1525 Page 2 of 2 54

41 TEST INST(S) Caterpillar 8T900 AC/DC Clamp-On Ammeter 4.3 Alternating Current Test 60 Hz (A ac) (A ac) A range to to to to to to to to Hz (A ac) (A ac) 500 A range to to to to to Direct Current Test Range (A dc) (A dc) A range to to to to to to 52 NOTE Add a SPECIAL CALIBRATION label stating, TI calibrated to Hz, Hz and 500 A dc. Page 1 of 1 (56 blank) 55

42 TEST INST(S) Universal Enterprises, DL90A or DL100 Digital Clamp-on Tester 3.7 Jaws clean -- ck ( ) NA 4.1 Alternating Voltage Test (V ac) (V ac) V range 60 Hz to to to to V range 400 Hz to Hz to Volt range 60 Hz to to to to Direct Voltage Test (mv dc) (mv dc) Millvolt range to to to to (V dc) (V dc) to to to to V range to to to to Page 1 of 2 57

43 TEST INST(S) Universal Enterprises, DL90A or DL100 Digital Clamp-on Tester 4.3 Alternating Current Test (A) (A) A range 60 Hz to to to to A range 400 Hz to Hz to Hz to to to to A range to to to to Ohmmeter Test ( ) ( ) range to to to to (k ) (k ) k range to to to to Page 2 of 2 58

44 TEST INST (S) Fluke, 36 Clamp-Meter 4.1 Alternating Voltage Test V ac 60 Hz (V ac) (V ac) to to to to V ac 400 Hz (V ac) (V ac) to to to to V ac 60 Hz (V ac) (V ac) to to to to V ac 400 Hz (V ac) (V ac) to to to to Direct Voltage Voltage range 0 to 200 V dc (V dc) (V dc) to to to to Voltage range 200 to 600 V dc (V dc) (V dc) to to to to 609 Page 1 of 3 59

45 TEST INST (S) Fluke, 36 Clamp-Meter 4.3 Alternating Current Test Alternating current range 0 to 60 Hz (A ac) (A ac) to to to to Alternating current range 0 to 400 Hz (A ac) (A ac) to to to to Alternating current range 0 to 60 Hz (A ac) (A ac) to to to to 615 Alternating current range 0 to 400 Hz (A ac) (A ac) to to to to Direct Current Test Direct current range 0 to 200 A dc (A dc) (A dc) to to to to Page 2 of 3 60

46 TEST INST (S) Fluke, 36 Clamp-Meter Range 0 to 600 A dc (A dc) (A dc) to to to to 616 Range 600 to 1000 A dc (A dc) (A dc) to to to Ohmmeter Test Zero meter check -- ck ( ) NA Resistance range 200 ( ) ( ) to to to Page 3 of 3 (62 blank) 61

47 TEST INST (S) Fluke 333 Clamp-On Ammeter PROCEDURE STEP FUNCTION TESTED NOMINAL MEASURED VALUES OUT FIRST RUN SECOND RUN OF CALIBRATION ERANCES 4.1 Alternating Voltage Test V ac 60 Hz (V ac) (V ac) to to to to to to to to Direct Voltage Voltage range 0 to 600 V dc (V dc) (V dc) to to to to to to to to Alternating Current Test Alternating current range 0 to 60 Hz TI Indication (A ac) (A ac) 25 A to A to A to A to Page 1 of 2 63

48 TEST INST (S) Fluke 333 Clamp-On Ammeter PROCEDURE STEP FUNCTION TESTED NOMINAL MEASURED VALUES OUT FIRST RUN SECOND RUN OF CALIBRATION ERANCES 4.3 Alternating Current Test Alternating current range 0 to 60 Hz TI Indication (A ac) (A ac) 300 A to A to Ohmmeter Test Zero meter check -- ck ( ) NA Resistance range 0 to 600 ( ) ( ) to to Page 2 of 2 64

49 TEST INST (S) Fluke 337 Clamp-On Ammeter 4.1 Alternating Voltage Test V ac 60 Hz (V ac) (V ac) to to to to to to to to V ac 400 Hz (V ac) (V ac) to to to to to to to to Direct Voltage Voltage range 0 to 600 V dc (V dc) (V dc) to to to to to to to to Page 1 of 3 65

50 TEST INST (S) Fluke 337 Clamp-On Ammeter 4.3 Alternating Current Test Alternating current range 0 to 60 Hz TI Indication (A ac) (A ac) 25 A to A to A to A to A to A to A to A to Alternating current range 0 to 400 Hz TI Indication (A ac) (A ac) 25 A to A to A to A to A to Direct Current Test Direct current range TI Indication (A dc) (A dc) 50 A to A to A to A to A to A to Page 2 of 3 66

51 TEST INST (S) Fluke 337 Clamp-On Ammeter 4.5 Ohmmeter Test Zero meter check -- ck ( ) NA Resistance range 0 to 600 ( ) ( ) to to Resistance range ( ) ( ) to to to to 6095 Page 3 of 3 (68 blank) 67

52 TEST INST (S) AEMC AC Current Probe Clamp On Ammeter 4.3 Alternating Current Test* to 1000 A 60 Hz (ma ac) (ma ac) 50 A 60 Hz to A 60 Hz to A 60 Hz to A 60 Hz to A 400 Hz to A 50 Hz to A 1000 Hz** to 51.0 * TI current output is to be used with item 2.8 (set to measure ac current). Current output from the TI is measured by item 2.8. ** The item 2.3 standards, the 327 Type 2 transformer, and the ammeter are not to be used for the 1 khz test, use either the shunts and DMM or the 5700AAN and 5725A instead. Page 1 of 1 (70 blank) 69

53 TEST INST (S) F. W. Bell CG-109A Clamp On Ammeter 4.3 Alternating Current Test * Alternating current range: 0 to 100 A 60 Hz (A ac) (V ac) (TI outputs V ac, fullscale is to V ac, use with DMM set to V ac) to to to 1000 A 60 Hz to (TI outputs V ac, fullscale is to V ac, use with DMM set to V ac) to to 100 A 400 Hz to (TI outputs V ac, fullscale is to V ac, use with DMM set to V ac) to to 1000 A 400 Hz to to 100 A 50 Hz to *Zero the TI before each measurement. Page 1 of 1 (72 blank) 71