Maintenance Performance Test Verify the probe accuracy by measuring a 25 kV dc 0.25% 80K-40 voltage source. When used with a compatible dc voltmeter, the probe should measure the source with 1% accuracy. No calibration adjustments are provided. High Voltage Probe Cleaning Instruction Sheet Use a soft cloth dampened in distilled water to clean the 80K-40. Never use solvents or abrasive cleaners. Make sure the 80K-40 is Introduction dry before reuse. The Model 80K-40 is a high voltage accessory probe designed to extend the voltage measuring capability of an ac/dc voltmeter up LIMITED WARRANTY & LIMITATION OF LIABILITY to 40,000 volts Overvoltage Category I. This means the probe can Each Fluke product is warranted to be free from defects in material and only be used to make measurements on energy limited circuits workmanship under normal use and service. The warranty period is one within equipment. Examples include high voltage within year and begins on the date of shipment. Parts, product repairs and televisions or photo copy machines. DO NOT use this probe to services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and measure high voltages on power distribution systems. The probe does not apply to fuses, disposable batteries or to any product which, in is a precision 1000:1 voltage divider formed by two matched Flukes opinion, has been misused, altered, neglected or damaged by resistors. The unusually high input impedance offered by these accident or abnormal conditions of operation or handling. Fluke warrants resistors minimizes circuit loading and thereby, optimizes that software will operate substantially in accordance with its functional measurement accuracy. A special plastic body houses the divider specifications for 90 days and that it has been properly recorded on non- and provides the user with isolation and protection from the defective media. Fluke does not warrant that software will be error free or voltage being measured. operate without interruption. Fluke authorized resellers shall extend this warranty on new and unused Specifications products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is The 80K-40 will achieve rated accuracy when used with a available if product is purchased through a Fluke authorized sales outlet voltmeter (ac or dc) having an input impedance of 10 M 1.0%.* or Buyer has paid the applicable international price. Fluke reserves the Specifications for the probe are as follows: right to invoice Buyer for importation costs of repair/replacement parts Voltage Range: 1 kV to 40 kV dc or peak ac, 28 kV rms ac when product purchased in one country is submitted for repair in another country. Input Resistance: 1000 M Flukes warranty obligation is limited, at Flukes option, to refund of the Division Ratio: 1000: 1 (1000X attenuator) purchase price, free of charge repair, or replacement of a defective Accuracy DC: product which is returned to a Fluke authorized service center within the warranty period. 20 kV to 35 kV: 1% at 20C to 30C add 1% at 10C To obtain warranty service, contact your nearest Fluke authorized service <20C and >30C to 45C. (For total measurement accuracy center or send the product, with a description of the difficulty, postage and add accuracy specification of voltmeter being used.) insurance prepaid (FOB Destination), to the nearest Fluke authorized 0 kV to <20 kV and >35 kV to 40 kV: 2%. service center. Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation Accuracy AC: 60 Hz, 5%. prepaid (FOB Destination). If Fluke determines that the failure was Safety: Meets IEC 1010-2-031:1993, Type B, 40 kV dc or, peak caused by misuse, alteration, accident or abnormal condition of operation ac, 28 kV rms ac, Overvoltage Category I (voltages derived from or handling, Fluke will provide an estimate of repair costs and obtain limited energy transformer). authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be * The input impedance of Autoranging Fluke handheld digital billed for the repair and return transportation charges (FOB Shipping multimeters varies as a function of range. The only range that Point). deviates significantly from 10 M is the 3V (Models 21, 23, 25, THIS WARRANTY IS BUYERS SOLE AND EXCLUSIVE REMEDY AND 27, 70, 73, 75, 77) or 4V (Models 10, 11, 12, 29, 79, 83, 85, 86, IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, 87, 88) range where the impedance is 11.11 M. To enhance the INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF measurement accuracy when using this range, apply a correction MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. factor of 0.99, i.e. multiply the displayed reading by .99. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, This probe is intended for low energy applications such as CRT INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF and similar circuits. Above 2000 meters altitude, and up to 5000 WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY meters, derate linearly the working voltage from 40 kV peak to 28 OTHER THEORY. kV peak, and derate linearly the transient overvoltage from 80 kV Since some countries or states do not allow limitation of the term of an peak to 57 kV peak. Transient overvoltage refers to micro-second implied warranty, or exclusion or limitation of incidental or consequential duration impulses caused by lightning or load switching. See damages, the limitations and exclusions of this warranty may not apply to International Electrotechnical Commission Publication 664-1980, every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of competent jurisdiction, such holding will not Clause 3.9 Table II, and Appendix A. affect the validity or enforceability of any other provision. Fluke Corporation Fluke Europe B.V. Measurement Considerations P.O. Box 9090 P.O. Box 1186 Before attempting to use the 80K-40, the following paragraphs Everett, WA 98206-9090 5602 BD Eindhoven should be read and understood. Particular attention should be U.S.A. The Netherlands given to Operator Safety. PN 481978 January 1978, Rev.9, 3/97 5/94 1978, 1996, 1997 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.Circuit Loading Operator SafetyW The 80K-40 represents a 1000 M load to the circuit being Indicates the operator must refer to an explanation in this measured, or 1 A per 1 kV. Table 1 shows the circuit loading manual. and input/output characteristics of the probe over its Indicates terminals at which lethal voltages may exist. measurement range. Warning Table 1. 80K-40 Circuit Loading and Input/Output Characteristics To avoid damage or electric shock: Input Voltage Loading Current Output Voltage Use within ratings and under dry (no condensation) conditions. 10V 10 nA 10 mV 100V 100 nA 100 mV The 80K-40 user should be familiar with, and exercise, all possible high voltage safety 1 kV 1A 1V practices. 10 kV 10 A 10V 20 kV 20 A 20V When making a measurement, never make body contact with the probe tip or the red portion of the 30 kV 30 A 30V probe. Always hold the probe by its black handle. 40 kV 40 A 40V Before making a measurement, make sure that Operation the tab side of the output connector is connected to the voltmeters low input terminal. Use the following procedure to operate the 80K-40: The clip lead must be attached to earth ground. 1. Select and energize a compatible voltmeter. 2. Equip the voltmeter with a suitable shunt, if required. Voltmeter Compatibility Accuracy of the meter is not included in the accuracy of the 3. Select an appropriate voltage range (1 volt reading per 1000 probe, and must be added to the probe accuracy to determine volt input. See Table 1). system accuracy. 4. Connect the probes output leads to the voltmeter input The 80K-40 is mechanically compatible with any ac or dc terminals. voltmeter or multimeter capable of accepting a standard spaced, 5. Connect the probes clip lead to ground. See OPERATOR 0.75 (19mm) double, banana plug, having standard, .160 (4mm) SAFETY. plugs. 6. Connect probe tip to circuit being measured and observe The 80K-40 probe is electrically compatible with any ac or dc voltmeter reading. Apply correction factor to reading when voltmeter or multimeter that has an input impedance of 10 M necessary. 1%. Voltmeters or multimeters with other input impedances require the use of an external shunt or a correction factor to obtain an accurate measurement. Higher impedance voltmeters Theory Of Operation or multimeters should be equipped with a shunt, and lower The 80K-40 High Voltage probe, is designed to extend the impedance voltmeters or multimeters should be assigned voltage measurement range of an ac/dc voltmeter up to 40,000 correction factors. Applicable formulas follow: volts. Electrically, the probe is a passive attenuator as shown in a. The following formula is used to determine the value of an Figure 1. Its high input impedance (1000 M), as well as its external shunt resistor (meter impedance >10 M): accuracy and stability characteristics are achieved through the use of special thick film resistors. When the probe is connected to Rm x 10 a voltmeter with a 10 M input resistance the probe becomes an Rs = Rm - 10 accurate 1000:1 divider. Notice that the divider depends upon a ground lead to complete the low side of the circuit path. Where: Rs = Shunt resistance in M Therefore, this connection must always be secure before Rm = Voltmeter input impedance in M (>10 M) attempting a voltage measurement. Otherwise, instrument Example: If RM = 20 M, damage or a shock hazard will result. 20 x 10 200 Rs = = =2.0M 80K-40 DC Voltmeter 20 10- 10 Probe Tip b. Use the following formula to calculate a correction factor (meter impedance <10 M): HI 10M Replacement Resistor Kit 1.11 + Rm PN 939335 Cf = LO 1.11 x Rm Where: Cf=Correctionfactor (multiplier for meter reading) Ground Rm = Voltmeter input impedance in M Lead Example: If Rm = 1 M, 1.11 + 1 2.11 Figure 1. 80K-40 Simplified Circuit Diagram Cf = = =1.901 1.11 x 1 1.11 Therefore: A meter reading of 0.526 volts represents an input of: 0.526 x 1.901 = 1 or 1 kV.