Fluke 1520 User manual

September 2000 Rev.2, 2/03
©2000-2003Fluke Corporation. All rights reserved.Printedin USA
All product names are trademarks of their respective companies.
®
1520
MegOhmMeter
Users Manual

i
Table of Contents
Title Page
Unpacking the Meter......................................................................................... 1
Safety Information and Symbols....................................................................... 3
Key functions.................................................................................................... 6
Display.......................................................................................................... 8
Using the Meter ................................................................................................ 10
Connecting to the Circuit Under Test............................................................ 10
Auto-Shut-Off................................................................................................ 12
Measuring Insulation Resistance .................................................................. 12
Measuring Low Resistance........................................................................... 16
Measuring Resistance................................................................................... 18
Measuring Voltage........................................................................................ 18
Checking the Battery..................................................................................... 19
Maintaining the Meter....................................................................................... 20
Cleaning........................................................................................................ 20
Replacing and Disposing of the Batteries...................................................... 21
Testing and Replacing the Fuse.................................................................... 24
Replacement Parts and Optional Accessories.................................................. 27
Principle of Measurement for Resistance.......................................................... 28
Service Centers................................................................................................ 28
Specifications.................................................................................................... 29

ii

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 ..................................................................................... 2
2. Display...................................................................................................... 9
3. Connecting to the Circuit Under Test ........................................................ 11
4. Display Example ....................................................................................... 19
5. Replacing the Batteries............................................................................. 23
6. Replacing the Fuse................................................................................... 26

1
Fluke 1520
Unpacking the Meter
The Fluke Model 1520 MegOhmMeter (hereafter, “the meter”) is a handheld instrument
designed 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 probes, red and black
•2 alligator clips, red and black
•Hand strap
•Carrying case
•CD ROM (Not Pictured)

Fluke 1520
Users Manual
2
acf02f.eps
Figure 1. Shipment Content

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 on
the Meter and in the manual are explained below.
YRisk of electric shock JEarth
WSee manual IFuse
TEquipment protected by double or
reinforced Insulation DAC or DC
MBattery Recycling information
Conforms to CSA C22.2 No 1010.1-92 +
Amendment 2 1997, UL 3111 and
ANSI/ISA SP82.01 1994 VDE Conforms to VDE
EN61010 (Pending)
PConforms to EU directives tConforms to UL 3111.1
CAT III
OVERVOLTAGE (Installation) CATEGORY ,,, , Pollution Degree 2 per IEC1010-1
refers to the level of Impulse Withstand Voltage protection provided. Equipment of
OVERVOLTAGE CATEGORY
,,, is equipment in fixed installations (e.g., electricity
meter and primary over-current protection equipment.

Fluke 1520
Users Manual
4
W
Safety Information
Use of instrument in a manner not specified by the manufacturer may impair
safety features/protection provided by the equipment. Read the following safety
information carefully before using or servicing the instrument. To avoid electric
shock or fire, do the following:
•Avoid working alone.
•Inspect the test leads for damaged insulation or exposed metal. Check test
lead continuity. Damaged leads must be replaced. Do not use the Meter if it
looks damaged.
•Be careful when working above 30 V ac rms, 42 V ac peak and
60 V dc. Such voltages pose a shock hazard.
•When using the probes, keep your fingers away from probe contacts. Keep
your fingers behind the finger guards on the probes.
•Measurements can be adversely affected by impedances of additional
operating circuits connected in parallel or by transient currents.
•Verify operation prior to measuring hazardous voltages (voltages above 30 V
ac rms, 42 V ac peak and 60 V dc).

MegOhmMeter
Safety Information and Symbols
5
W
Safety Information (cont.)
•Place test leads in proper input terminals.
•Disconnect the live test lead before disconnecting the neutral test lead.
•Do not use the Meter if the battery indicator (
G
) shows a battery empty
condition.
•Use only Fluke recommended batteries and fuse.
•Do not use the Meter with any parts or cover removed.
•Do not use the Meter around explosive gas, vapor or dust.
•Disconnect the test leads from power sources and from the Meter before
changing the batteries or fuse.
•Do not use the Meter in a wet environment.
•Use only Fluke specified test leads.