Page 3 - Table of Contents; Title
i Table of Contents Title Page Unpacking the Meter ......................................................................................... 1Safety Information and Symbols ....................................................................... 3Key functions ...........................................
Page 4 - ii
Page 5 - List of Tables
ii List of Tables Table Title Page 1. Key and Switch Descriptions ..................................................................... 6 2. Display Description ................................................................................... 8 List of Figures Figure Title Page 1. Shipment Content...
Page 6 - Unpacking the Meter; The MegOhmMeter includes the following items, see Figure 1:
1 Fluke 1520 Unpacking the Meter The Fluke Model 1520 MegOhmMeter (hereafter, “the meter”) is a handheld instrumentdesigned primarily to make resistance/insulation resistance measurements. The MegOhmMeter includes the following items, see Figure 1: • 2 test leads, red and black, 1.5 m • 2 test probe...
Page 7 - Figure 1. Shipment Content
Fluke 1520Users Manual 2 acf02f.eps Figure 1. Shipment Content
Page 8 - MegOhmMeter; Safety Information and Symbols; Warning; CAT III
MegOhmMeter Safety Information and Symbols 3 Safety Information and Symbols A Caution identifies conditions and actions that may damage the Meter. A W Warning identifies conditions and actions that pose hazard(s) to the user. International symbols onthe Meter and in the manual are explained below. Y...
Page 9 - Safety Information
Fluke 1520Users Manual 4 W Safety Information Use of instrument in a manner not specified by the manufacturer may impairsafety features/protection provided by the equipment. Read the following safetyinformation carefully before using or servicing the instrument. To avoid electricshock or fire, do th...
Page 11 - Key functions; Table 1. Key and Switch Descriptions
Fluke 1520Users Manual 6 Key functions Table 1. Key and Switch Descriptions Rotary switchTo select a measurement function. T Used for the Insulation Resistance and Low Resistance test functions.Press and hold this button until the main reading is stable. L Locks the test in Insulation Resistance or ...
Page 12 - icon appears on
MegOhmMeter Key functions 7 Table 1 (continued) N Resistance Beeper functionTurns the Beeper function ON and OFF. When ON, the R icon appears on the display and the Meter beeps at short circuit. Z Low Resistance functionTurns the test lead resistance compensation ON. The X icon appears on the displa...
Page 13 - Display; Table 2 and Figure 2 describe the display.
Fluke 1520Users Manual 8 Display Table 2 and Figure 2 describe the display. Table 2. Display Description 1 Voltage applied to the probes in Insulation Resistance function. 2 Low Resistance/Resistance function indicator. 3 Resistance reading held from the last measurement in Insulation Resistance or ...
Page 15 - Using the Meter; Connecting to the Circuit Under Test; Figure 3 shows the proper connections.
Fluke 1520Users Manual 10 Using the Meter Connecting to the Circuit Under Test Figure 3 shows the proper connections. W Warning To prevent electric shock when performing resistance tests, remove allpower from the circuit to be measured. W Warning To prevent electric shock, first connect the test lea...
Page 17 - Measuring Insulation Resistance
Fluke 1520Users Manual 12 Auto-Shut-Off The Meter automatically turns off after 15 minutes of non-use. In Lo Ohms mode, the meterturns off after 5 minutes of non-use. To turn the meter back on, turn the rotary switch toOFF, then to the desired function. Measuring Insulation Resistance W Warning • Me...
Page 18 - Note
MegOhmMeter Using the Meter 13 To measure insulation resistance, do the following: 1. Select the test voltage. 2. Connect the probes to the circuit to be measured.The meter automatically detects if the circuit is energized, and displays the detected voltage. W Warning A repetitive beep and the flash...
Page 19 - If the 250V range is selected, the display reads >1000 M
Fluke 1520Users Manual 14 The Meter beeps when the reading is stable. The upper right display shows the sameresistance reading as the main display. When resistance is higher than the maximum display range, the meter reacts asfollows: • If the 250V range is selected, the display reads >1000 M Ω . ...
Page 20 - Using the LOCK Function to Measure Insulation Resistance; To use the LOCK function:; Press LOCK or TEST to disengage the lock function.
MegOhmMeter Using the Meter 15 Using the LOCK Function to Measure Insulation Resistance The LOCK function holds the test voltage on the probes. Use LOCK to make long durationmeasurements without having to push and hold the TEST button. To use the LOCK function: 1. Press the TEST button, then press t...
Page 21 - Measuring Low Resistance; To measure low resistance:; is
Fluke 1520Users Manual 16 Measuring Low Resistance To measure low resistance: 1. Zero out the test lead resistance (see Table 1). 2. Connect the probes to the circuit to be measured.If voltage is present on the probes, the voltage is displayed. W Warning A repetitive beep and the flashing high volta...
Page 22 - Using the LOCK Function to Measure Resistance; You can now probe the desired test locations in succession.; Caution
MegOhmMeter Using the Meter 17 5. Exchange the red (+) and black (-) probes on the circuit and repeat steps 3 and 4 toreverse the polarity of the test current. The reading should be the same as theprevious. This test is useful to detect corroded connections, which can cause differentreadings for bot...
Page 23 - Measuring Resistance; If the resistance is approximately 30; Measuring Voltage; Connect the probes to the circuit to be measured.
Fluke 1520Users Manual 18 Measuring Resistance 1. Connect the probes to the circuit to be measured.Measure voltage first to ensure that no hazardous voltage ispresent, then switch to Ohms. 2. If the resistance is approximately 30 Ω or less, the Meter beeps. To turn off the beeper, press the beeper b...
Page 24 - Checking the Battery; Figure 4. Display Example
MegOhmMeter Using the Meter 19 Checking the Battery This function tests the battery under simulated load perEN61557. Disconnect all test leads from any circuit. acf09f.eps Full Empty Empty 100% - Full 0% - acf13f.eps Figure 4. Display Example
Page 25 - Maintaining the Meter; Cleaning; Clean only with soap and water. Remove any residue afterwards.
Fluke 1520Users Manual 20 Maintaining the Meter This section provides basic maintenance information, including fuse and batteryreplacement instructions. Caution Do not attempt to repair or service your Meter unless you are qualified to doso and have the relevant calibration, performance test, and se...
Page 26 - Replacing and Disposing of the Batteries; Turn the rotary switch to the OFF position.
MegOhmMeter Maintaining the Meter 21 Replacing and Disposing of the Batteries W Warning To avoid electric shock, disconnect the test leads from the inputs beforeopening the Meter for battery replacement. To avoid false readings, which could lead to possible electric shock orpersonal injury, replace ...
Page 29 - Testing and Replacing the Fuse; Before replacing the fuse, test it as described in the next section.; Testing the Fuse; Use the following procedure to test the internal fuse of the Meter.
Fluke 1520Users Manual 24 Testing and Replacing the Fuse W Warning To avoid electric shock, disconnect the test leads from the inputs beforeopening the Meter for fuse replacement. To prevent personal injury or damage to the Meter, install ONLY Flukespecified fuse identified in the “Replacement Parts...
Page 31 - Figure 6. Replacing the Fuse
Fluke 1520Users Manual 26 acf11f.eps Figure 6. Replacing the Fuse
Page 32 - Replacement Parts and Optional Accessories; Replacement Part
MegOhmMeter Replacement Parts and Optional Accessories 27 Replacement Parts and Optional Accessories Replacement Part Part Number Battery 1.5 V Alkaline Size C 423582 Test Lead set 669058 Test Probe, 1 kV, lantern tip, red 803459 Test Probe, 1 kV, lantern tip, black 803467 Alligator Clip, red 803434...
Page 33 - or call Fluke using any of the phone numbers listed below:
Fluke 1520Users Manual 28 Principle of Measurement for Resistance The Meter measures resistance by inducing a current in the circuit under test, measuringthe resultant potential across the circuit, and then calculating the resistance of the circuit.The resistance is then established by performing th...
Page 34 - Specifications; Environmental
MegOhmMeter Specifications 29 Specifications Environmental Operating Temperature -10 ° C to +50 ° C Storage Temperature -40 ° C to +70 ° C Temperature Coefficient 0.10 x (specified accuracy)/ ° C (< 18 ° C or > 28 ° C) Relative Humidity:Non condensing (< 10 ° C) 90 % RH (10 ° C to 30 ° C) 7...
Page 37 - Lo
Fluke 1520Users Manual 32 Test Voltages 250 V, 500 V, 1000 V Accuracy +20 %, -0 % Nominal Current 1 mA Number of measurements 5,000 Circuitry Protection test inhibited if ≥ 30 V ac or dc at inputs Lo Ω Display Range 40.00 Ω Measurement Range 0.10 Ω to 40.00 Ω Accuracy 2 % + 2 counts Resolution 0.01 ...
Page 39 - Limited Warranty & Limitation of Liability
Fluke 1520Users Manual 34 Limited Warranty & Limitation of Liability Each Fluke product is warranted to be free from defects in material and workmanship under normal useand service. The warranty period is three years and begins on the date of shipment. Parts, productrepairs and services are warr...
