Instructions A622 100 Amp AC/DC Current Probe 070-8883-03 Revision A www.tektronix.
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Warranty 2 Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Contacting Tektronix Phone 1-800-833-9200* Address Tektronix, Inc. Department or name (if known) 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA Web site www.tektronix.com Sales support 1-800-833-9200, select option 1* Service sup- 1-800-833-9200, select option 2* port Technical support www.tektronix.com/support 1-800-833-9200, select option 3* 6:00 a.m. - 5:00 p.m. Pacific Standard Time * This phone number is toll free in North America.
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Connect and Disconnect Properly. Connect the probe output to the measurement instrument before connecting the probe to the circuit under test.
General Safety Summary Safety Terms and Symbols Terms in This Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking.
Getting Started The A622 current probe (Figure 1) enables a general purpose oscilloscope to display AC and DC current signals up to 100 amps Peak (70 A RMS). The A622 current probe can also make AC and DC measurements with a multimeter by using the BNC-to-banana plug adapter that is available as a recommended accessory. See page 17 for ordering information.
Getting Started Table 1 highlights the controls and indicators on the A622 current probe. Table 1: A622 controls and indicators Control/Indicator Description Current flow symbol. The arrow show the probe’s polarity convention for measuring current flowing from positive to negative. ZERO Zero adjustment. Rotate to adjust the probe output to zero when there is no current present. It may also be used to offset a DC signal component.
Operating Basics Before using the probe, the batteries must be installed. See the battery installation instructions on page 7. WARNING. Do not clamp the probe onto circuits with voltages greater than 600 VAC. Personal injury or damage to the probe may result. Always connect the probe to the instrument before clamping onto the circuit under test. 1. Connect the probe BNC connector to the oscilloscope input. Start by setting the oscilloscope channel vertical coupling to DC volts, the vertical deflection to 0.
Operating Basics Handles To load Jaws From source Figure 2: Connecting the A622 current probe 5. Adjust the probe and channel as necessary to get a clear view of the signal. Set the channel to DC volts to see both the AC and DC currents; set the channel to AC to see the AC current only. The current drawn by some devices looks much different than that of others. While the RMS current may be low, the momentary peaks may be quite high.
Operating Basics Resistive load Motor controller Figure 3: Typical current waveforms If you are using the A622 current probe with a multimeter, connect the probe with the recommended BNC-to-banana adapter. Connect the black lead to the meter COM, and the red lead to the VΩ input. To measure only AC current, set the meter to measure AC volts. To measure DC current, set the meter to measure DC volts. Note the current convention arrow on the probe to get the proper polarity reading.
Operating Basics Figure 4: Increasing the sensitivity 6 A622 Instructions
Maintenance Use the information in this section to properly maintain the operation of your A622 AC/DC Current Probe. Battery Notes The A622 current probe uses a single 9 V battery. Refer to page 9 for a detailed battery description. As the battery in the A622 current probe is drained, significant gain errors may occur. The green LED will continue to light until a low battery voltage of 6.5 V is reached. If probe gain errors are detected, replace the battery with a fresh one. Battery Installation 1.
Maintenance Battery Screw Figure 5: A622 battery compartment Cleaning To clean the probe body, use a soft cloth dampened in a solution of mild detergent and water. To clean the core, open the jaw and clean the exposed core surfaces with a cotton swap dampened with isopropyl alcohol (isopropanol). Lubricate the jaws mating surfaces with a light oil. Do not clean with solvents or abrasives. Do not immerse the probe.
Specifications These characteristics apply to an A622 AC/DC Current Probe installed on a Tektronix TDS 220 oscilloscope. The oscilloscope must be warmed up for at least 20 minutes and be in an environment within the limits in Table 5.
Specifications Table 3: Voltage and current ratings Maximum working current (A) Rating Range 10 mV/A Range 100 mV/A Maximum working voltage (V) Maximum floating voltage (V) DC 1001 10 600 600 DC + peak AC 1001 10 600 600 AC peak 100 10 600 600 AC peak-peak 200 20 1200 -- RMS CAT III 70.7 7.07 600 600 RMS CAT II 70.7 7.07 600 600 RMS CAT I 70.7 7.07 600 600 1 See Figure 7 for frequency derating Table 4: Physical Characteristics Dimensions 231 mm x 36 mm x 67 mm (9.
Specifications Table 5: Environmental Characteristics Temperature Working 0°C to +50°C (+32° to +122°F) Storage --20°C to +80°C (--4° to +176°F) Humidity 0° C to 40° C, 95% humidity 40° C to 50° C, 45% humidity Pollution Degree 2 0 100 mV/A range -1 10 mV/A range -2 Gain in dB -3 -4 -5 100 1k 10 k 100 k 1M Frequency (Hz) Figure 6: Gain versus frequency at 1 A peak, typical A622 Instructions 11
Specifications 160A 112A 140A 98A 120A 84A Peak 100A current 80A 70A 60A 42A 40A 28A 20A 14A 56A 0A RMS current 0A 10 100 1k 10 k 100 k Frequency (Hz) Figure 7: Maximum current versus frequency 12 A622 Instructions
Specifications 0 -2 -4 -6 Uncertainty % -8 Typical - 10 - 12 - 14 Specification - 16 0 20 40 60 80 100 Amperes (A) Figure 8: DC signal linearity in the 10 mV/A range, typical A622 Instructions 13
Specifications 0 - 10 - 50 Phase in degrees 10 mV/A range - 100 100 mV/A range - 150 100 1k 10 k 100 k Frequency (Hz) Figure 9: Phase versus frequency at 1 A peak, typical Table 6: Certifications and compliances EC Declaration of Conformity -- Low Voltage Compliance was demonstrated to the following specification as listed in the Official Journal of the European Union: Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC EN 61010-1/A2:1995 Safety requirements for electrical equipment for mea
Specifications Table 6: Certifications and compliances (cont.) U.S. Nationally Recognized Testing Laboratory Listing UL3111-1 Electrical Measuring and Test Equipment UL3111-2-032 Particular requirements for hand-held current clamps for electrical measurement and test equipment. Additional Compliance IEC61010-1/A2:1995 Safety requirements for electrical equipment for measurement, control, and laboratory use.
Specifications Table 6: Certifications and compliances (cont.) Pollution Degree A measure of the contaminates that could occur in the environment around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are rated. Pollution Degree 1 No pollution or only dry, nonconductive pollution occurs.
Replaceable Parts The A622 AC/DC Current Probe is shipped with the following items: H These instructions Tektronix part number 070-8883-XX H One 9V battery Tektronix part number 146-0017-00 ANSI/NEDA number 1604A IEC number 6LR61 Recommended accessory for use with DMM’s: H One BNC to banana plug adapter Tektronix part number 012-1450-00 The A622 does not have any user repairable assemblies. If you should have trouble with your probe, contact your local Tektronix Service Center or representative for help.
18 A622 Instructions
