Fluke 1526 User Manual
September 2000 Rev.2, 2/03
© 2000-2003 Fluke Corporation. All rights reserved. Printed in USA
All product names are trademarks of their respective companies.
®
1520
MegOhmMeter
Users Manual
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
i
ii
List of Tables
Table Title Page
1. Key and Switch Descriptions..................................................................... 6
2. Display Descri ption ................................................................................... 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
ii
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 bl ack, 1.5 m
• 2 test probes, red and bl ack
• 2 alligator clips, red and black
• Hand strap
• Carrying case
• CD ROM (Not Pictured)
1
Fluke 1520
Users Manual
Figure 1. Shipment Content
acf02f.eps
2
MegOhmMeter
Safety Information and Symbols
Safety Information and Symbols
A Caution identifi es conditions and actions that may damage the Meter. A WWarning
identifies conditions and actions that pose hazard(s) to the user. International symbols on
the Meter and in the manual ar e explained below.
Y
W
T
M
P
CAT III
Risk of electric shock
See manual
Equipment protected by double or
reinforced Insulation
Battery Recycling information
Conforms to CSA C22.2 No 1010.1-92 +
Amendment 2 1997, UL 3111 and
ANSI/ISA SP82.01 1994
Conforms to EU directives
OVERVOLTAGE (Installation) CATEGORY
refers to the level of Impulse Withstand Voltage protection provided. Equipment of
OVERVOLTAGE CATEGORY
meter and primary over-current protection equipment.
,,,
is equipment in fixed installations (e.g., electricity
J
I
D
VDE
t
,,,
, Pollution Degree 2 per IEC1010-1
Earth
Fuse
AC or DC
Conforms to VDE
EN61010 (Pending)
Conforms to UL 3111.1
3
Fluke 1520
Users Manual
W
Safety Information
Use of instrument in a manner not specified by the manufact urer may impair
safety features/protection provided by the equipment. Read the following safety
information caref ully before using or servici ng 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 abo ve 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 t ransient currents.
• Verify operation prior to measuring hazardous voltages (voltages above 30 V
ac rms, 42 V ac peak and 60 V dc).
4
MegOhmMeter
Safety Information and Symbols
W
Safety Information (cont.)
• Place test leads in pr oper input terminals.
• Disconnect the live t est lead before disconnect ing the neutral test lead.
• Do not use the Meter if the battery indicator (G ) shows a battery empty
condition.
• Use only Fluke recommend ed 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 l eads from power sources and from the Meter before
changing the batteri es or fuse.
• Do not use the Meter in a wet environment.
• Use only Fluke specifi ed test leads.
5
Fluke 1520
Users Manual
Key functions
Table 1. Key and Switch Descriptions
Rotary switch
To select a measurement function.
6
T
L
Used for the Insulation Resistance and Low Resistance test functi ons.
Press and hold this button until the main reading is stable.
Locks the test in Insulation Resistance or Low Resistance function.
To lock: press and hold TEST, then press LOCK and simultaneously release
both buttons. The icon
• Insulation Resistance- this mode continuously applies the test voltage
to the circuit to be tested. The beeper sounds every 2 seconds to
remind you that you are in the Lock mode.
• Low Resistance- this mode continuously applies the test current to the
circuit to be tested.
To unlock: press LOCK or TEST again.
V LOCK appears on the display.
N
Z
C
MegOhmMeter
Key functions
Table 1 (continued)
Resistance Beeper function
Turns the Beeper function ON and OFF. When ON, the R icon appears on
the display and the Meter beeps at short circuit.
Low Resistance function
Turns the test lead resistance compensation ON.
The X icon appears on the display. To compensate, touch the probe tips
together, then press and hold ZERO until the Meter beeps. The main display
indicates 0.00.
Backlight button
Turns the display backlight ON and OFF.
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Fluke 1520
Users Manual
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 Insulati on Resistance or Low
Resistance function.
4 Beeper symbol shows if beeper function is turned on in Resistance functi on.
5 Zero symbol is on if test leads are zeroed out.
6 Main reading display for all functions.
7 Analog bar graph displays resistance on a logarithmic scale and voltage on a linear
scale. The value always tracks the main reading.
8 High voltage warning symbol flashes if voltage ≥ 30 V ac or dc is present on the probes.
9
Battery life indicator. Displays briefly when the Meter is first switched to a function.
Displays the amount of battery voltage left in increment s of 25 %.
10 Lock symbol is on if the TEST mode is locked in Insulation or Low Resistance functions.
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