Fluke 110 PLUS User manual

PN 4750658
December 2015
© 2015 Fluke Corporation. All rights reserved.
Specifications are subject to change without notice. All product names are trademarks of their respective companies.
110 PLUS and 115
True-rms Multimeters
Users Manual

LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for three years from the
date of purchase. This warranty does not cover fuses, disposable batteries, or damage from acci-
dent, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.
Resellers are not authorized to extend any other warranty on Fluke’s behalf. To obtain service
during the warranty period, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that Service Center with a description of the
problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS
FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the
exclusion or limitation of an implied warranty or of incidental or consequential damages, this limi-
tation of liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99

i
Table of Contents
Title Page
Introduction.................................................................................................. 3
Contacting Fluke ......................................................................................... 3
Unsafe Voltage............................................................................................ 3
Test Lead Alert............................................................................................ 3
Safety Information ....................................................................................... 4
Display ........................................................................................................ 7
Terminals..................................................................................................... 9
Rotary Switch Positions............................................................................... 10
Battery Saver(Sleep Mode) ..................................................................... 11
MIN MAX AVG Recording Mode ................................................................. 11
Display HOLD.............................................................................................. 11
Backlight...................................................................................................... 11
Manual and Autoranging ............................................................................. 11
Power-Up Options....................................................................................... 12
Making Basic Measurements ...................................................................... 13
Measuring Resistance ............................................................................. 13
Testing for Continuity............................................................................... 14

110 PLUS and 115
Users Manual
ii
Measuring AC and DC Voltage............................................................... 14
Using Auto Volts Selection (110 PLUS only) .......................................... 14
Measuring AC and DC Millivolts.............................................................. 15
Measuring AC or DC Current (115 only)................................................. 15
Measuring Current above 10 Amps ........................................................ 16
Measuring Capacitance (115 only) ......................................................... 17
Measuring Frequency (115 only) ............................................................ 17
Low Impedance Capacitance Measurements (115 only) ....................... 18
Testing Diodes (115 only)........................................................................... 18
Using the Bargraph..................................................................................... 19
Testing the Fuse (115 only)........................................................................ 19
Maintenance............................................................................................... 20
Replacing the Battery and Fuse.............................................................. 20
Cleaning.................................................................................................. 21
General Specifications................................................................................ 22

1
True-rms Multimeters
Introduction
The Fluke 110 PLUS and 115 are battery-powered, true-
rms multimeters (hereafter "the Meter" or the “Product”) with
a 6000-count display and a bar graph. This manual applies
to all models. All figures show the 115.
Contacting Fluke
To contact Fluke, call:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore [phone]
Anywhere in the world: [phone]
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement,
visit http://us.fluke.com/usen/support/manuals.
Unsafe Voltage
The hazardous voltage warning ( Y) shows on the display
when the Meter detects a voltage ≥30 V or a voltage
overload (OL) condition. When making frequency
measurements >1 kHz, the Ysymbol is unspecified.
Test Lead Alert
XW Warning
Personal injury or damage to the Meter can
occur if you attempt to make a measurement
with a lead in an incorrect terminal.
To remind you to check that the test leads are in the
correct terminals,  is briefly displayed and an audible
beep sounds when you move the rotary switch to or
from any A(Amps) position.

110 PLUS and 115
Users Manual
2
Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can
cause damage to the Product or the equipment under test.
XW Warning
To prevent possible electrical shock, fire, or personal injury:
•Read all safety information before you use the Product.
•Carefully read all instructions.
•Do not use the Product around explosive gas, vapor, or in damp or wet environments.
•Comply with local and national safety codes. Use personal protective equipment (approved rubber gloves,
face protection, and flame-resistant clothes) to prevent shock and arc blast injury where hazardous live
conductors are exposed.
•Examine the case before you use the Product. Look for cracks or missing plastic. Carefully look at the
insulation around the terminals.
•Do not use test leads if they are damaged. Examine the test leads for damaged insulation and measure a
known voltage.
•Limit operation to the specified measurement category, voltage, or amperage ratings.
•Use the correct terminals, function, and range for measurements.
•Do not touch voltages > 30 V ac rms, 42 V ac peak, or 60 V dc.
•Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of a
Product, probe, or accessory.
•Use Product-approved measurement category (CAT), voltage, and amperage rated accessories (probes,
test leads, and adapters) for all measurements.

True-rms Multimeters
Safety Information
3
•Do not apply more than the rated voltage, between the terminals or between each terminal and earth
ground.
•Remove all probes, test leads, and accessories that are not necessary for the measurement.
•Do not use in CAT III or CAT IV environments without the protective cap installed on test probe. The
protective cap decreases the exposed probe metal to <4 mm. This decreases the possibility of arc flash
from short circuits.
•Do not work alone.
•Measure a known voltage first to make sure that the Product operates correctly.
•Replace the batteries when the low battery indicator shows to prevent incorrect measurements.
•Remove the batteries if the Product is not used for an extended period of time, or if stored in temperatures
above 50 °C. If the batteries are not removed, battery leakage can damage the Product.
•Remove all probes, test leads, and accessories before the battery door is opened.
•The battery door must be closed and locked before you operate the Product.
•Do not use the Product if it operates incorrectly.
•Disable the Product if it is damaged.
•Use the Product only as specified, or the protection supplied by the Product can be compromised.
WCaution
Do not use the Auto Volts function to measure voltages in circuits that could be damaged by this function’s low
input impedance (≈3 kΩ) (110 PLUS only).

110 PLUS and 115
Users Manual
4
Symbols
XWARNING. HAZARDOUS VOLTAGE. Risk of
electric shock. WWARNING - RISK OF DANGER. Consult user documentation.
AC (Alternating Current) Fuse
DC (Direct Current) TDouble Insulated
Battery (Low battery when shown on the display.) Earth
PConforms to European Union directives. Both direct and alternating current
ÃConforms to relevant South Korean EMC Standards.
Measurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets
and similar points) of the low-voltage MAINS installation.
Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building’s
low-voltage MAINS installation.
Measurement Category IV is applicable to test and measuring circuits connected at the source of the building’s low-voltage
MAINS installation.
~This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard
this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in
the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not
dispose of this product as unsorted municipal waste.

True-rms Multimeters
Display
5
Display
9
6
15 16
10
11
12
7
5
4
3
2
1
14
13
8
edy02f.eps
No. Symbol Meaning Model
The Meter function is set to Continuity. 110 PLUS, 115
The Meter function is set to Diode Test 115
Input is a negative value. 110 PLUS, 115
YXHazardous voltage. Measured input voltage ≥30 V, or voltage overload
condition (OL). 110 PLUS, 115
Display hold enabled. Display freezes present reading. 110 PLUS, 115

110 PLUS and 115
Users Manual
6

 MIN MAX AVG mode enabled. Maximum, minimum, average or present reading displayed 110 PLUS, 115
LoZ The Meter is measuring voltage or capacitance with a low input impedance. 110 PLUS, 115
nµF mVµA
MkΩkHz Measurement units. 110 PLUS, 115
DC AC Direct current or alternating current 115
Battery low warning. 110 PLUS, 115
610000 mV Indicates the Meter’s range selection. 110 PLUS, 115
(Bar graph) Analog display. 110 PLUS, 115
Auto Volts
Auto
Manual
The Meter is in the Auto Volts function.
Autoranging. The Meter selects the range for best resolution.
Manual ranging. User sets the Meter’s range.
110 PLUS
110 PLUS, 115
110 PLUS, 115
Bar graph polarity 110 PLUS, 115
 WThe input is too large for the selected range. 110 PLUS, 115
 WTest lead alert. Briefly displayed whenever the Meter’s function switch is
rotated to or from any A position. 115

True-rms Multimeters
Terminals
7
Terminals
10 A
FUSED
COM V
A
1
2
3
edy01f.eps
No. Description Model
Input terminal for measuring ac and dc current to 10 A. 115
Common (return) terminal for all measurements. 110 PLUS, 115
Input terminal for measuring voltage, continuity, resistance, capacitance, frequency and
testing diodes. 110 PLUS, 115
Error Messages
 Battery must be replaced before the Meter will operate.
  Calibration required. Meter calibration is required before the Meter will operate.
  Internal error. The Meter must be repaired before it will operate.
-  Internal error. The Meter must be repaired before it will operate.

110 PLUS and 115
Users Manual
8
Rotary Switch Positions
Switch
Position Measurement Function Model
Automatically selects ac or dc volts based on the sensed input with a low impedance input. 110 PLUS

Hz (button)
AC voltage from 0.06 to 600 V. 110 PLUS, 115
Frequency from 5 Hz to 50 kHz. 115
DC voltage from 0.001 V to 600 V. 110 PLUS, 115
AC voltage from 6.0 to 600 mV, dc-coupled. DC voltage from 0.1 to 600 mV. 110 PLUS, 115
ΩOhms from 0.1 Ωto 40 MΩ. 110 PLUS, 115
Continuity beeper turns on at <20 Ωand turns off at >250 Ω. 110 PLUS, 115
Diode Test. Displays OL above 2.0 V. 115
Farads from 1 nF to 9999 μF. 115

Hz (button)
AC current from 0.1 A to 10 A (>10 to 20 A, 30 seconds on, 10 minutes off). >10.00 A display
flashes. >20 A, OL is displayed. DC-coupled.
Frequency from 45 Hz to 5 kHz. 115
DC current from 0.001 A to 10 A (>10 to 20 A, 30 seconds on, 10 minutes off). >10.00 A display
flashes. >20 A, OL is displayed. 115
Note: All ac functions and Auto-V LoZ are true-rms. AC voltage is ac-coupled. Auto-V LoZ, AC mV and AC amps are dc-coupled.

True-rms Multimeters
Battery Saver (Sleep Mode)
9
Battery Saver  (Sleep Mode)
The Meter automatically enters "Sleep mode" and blanks the
display if there is no function change, range change, or button
press for 20 minutes. Pressing any button or turning the rotary
switch awakens the Meter. To disable the Sleep mode, hold
down the button while turning the Meter on. The Sleep
mode is always disabled in the MIN MAX AVG mode.
MIN MAX AVG Recording Mode
The MIN MAX AVG recording mode captures the minimum and
maximum input values (ignoring overloads), and calculates a
running average of all readings. When a new high or low is
detected, the Meter beeps.
•Put the Meter in the desired measurement function and
range.
•Press to enter MIN MAX AVG mode.
•and MAX are displayed and the highest reading
detected since entering MIN MAX AVG is displayed.
•Press to step through the low (MIN), average (AVG),
and present readings.
•To pause MIN MAX AVG recording without erasing stored
values, press . is displayed.
•To resume MIN MAX AVG recording, press again.
•To exit and erase stored readings, press for at least
one second or turn the rotary switch.
Display HOLD
XW Warning
To avoid electric shock, when Display HOLD is
activated, be aware that the display will not
change when you apply a different voltage.
In the Display HOLD mode, the Meter freezes the display.
1. Press to activate Display HOLD. (is
displayed.)
2. To exit and return to normal operation, press or turn
the rotary switch.
Backlight
Press to toggle the backlight on and off. The backlight
automatically turns off after 40 seconds. To disable backlight
auto-off, hold down while turning the Meter on.
Manual and Autoranging
The Meter has both Manual and Autorange modes.
•In the Autorange mode, the Meter selects the range with the
best resolution.
•In the Manual Range mode, you override Autorange and
select the range yourself.

110 PLUS and 115
Users Manual
10
When you turn the Meter on, it defaults to Autorange and Auto
is displayed.
1. To enter the Manual Range mode, press . Manual is
displayed.
2. In the Manual Range mode, press to increment the
range. After the highest range, the Meter wraps to the lowest
range.
Note
You cannot manually change the range in the MIN
MAX AVG or Display HOLD modes.
If you press while in MIN MAX AVG or
Display Hold, the Meter beeps twice, indicating
an invalid operation and the range does not
change.
3. To exit Manual Range, press for at least 1 second or
turn the rotary switch. The Meter returns to Autorange and
Auto is displayed.
Power-Up Options
To select a Power-Up Option, hold down the button indicated in
the following table while turning the Meter on. Power-Up Options
are canceled when you turn the Meter off and when sleep mode
is activated.
Button Power-Up Options
Turns on all display segments.
Disables beeper.  is displayed when
enabled.
Enables low impedance capacitance measurements.  is displayed when
enabled. See page 14.
Disables automatic power-down ("Sleep
mode").  is displayed when enabled.
Disables auto backlight off.  is displayed
when enabled.

True-rms Multimeters
Making Basic Measurements
11
Making Basic Measurements
The figures on the following pages show how to make basic
measurements.
XW Warning
To prevent possible electrical shock, fire, or
personal injury:
•Disconnect power and discharge all high-
voltage capacitors before you measure
resistance, continuity, capacitance, or a
diode junction.
•Remove circuit power before you connect
the Product in the circuit when you
measure current. Connect the Product in
series with the circuit.
•Do not use the HOLD function to measure
unknown potentials. When HOLD is
turned on, the display does not change
when a different potential is measured.
When connecting the test leads to the circuit or device, connect
the common (COM) test lead before connecting the live lead;
when removing the test leads, remove the live lead before
removing the common test lead.
Measuring Resistance
edy04f.eps
XW Warning
To avoid electric shock, injury, or damage to
the Meter, disconnect circuit power and
discharge all high-voltage capacitors before
testing resistance, continuity, diodes, or
capacitance.

110 PLUS and 115
Users Manual
12
Testing for Continuity
edy06f.eps
Note
The continuity function works best as a fast,
convenient method to check for opens and shorts.
For maximum accuracy in making resistance
measurements, use the Meter’s resistance (e)
function.
Measuring AC and DC Voltage
Volts DCVolts AC
V
edy03f.eps
Using Auto Volts Selection (110 PLUS only)
With the function switch in the position, the Meter
automatically selects a dc or ac voltage measurement based on
the input applied between the V or + and COM jacks.
This function also sets the Meter’s input impedance to
approximately 3 kΩto reduce the possibility of false readings
due to ghost voltages.

True-rms Multimeters
Making Basic Measurements
13
Measuring AC and DC Millivolts
Millivolts DCMillivolts AC
DC
edy18f.eps
With the function switch in the position, the Meter
measures ac plus dc millivolts. Press to switch the Meter
to dc millivolts.
Measuring AC or DC Current (115 only)
XW Warning
To avoid personal injury or damage to the Meter:
•Never attempt to make an in-circuit current
measurement when the open-circuit potential to
earth is >600 V.
•Check the Meter's fuse before testing. (See
“Testing the Fuse”)
•Use the proper terminals, switch position, and
range for your measurement.
•Never place the probes in parallel with a circuit or
component when the leads are plugged into the A
(Amps) terminals.

110 PLUS and 115
Users Manual
14
A
1
2 3
edy08f.eps
Turn circuit power off, break the circuit, insert the Meter in series
with the circuit, and then turn circuit power on.
Measuring Current above 10 Amps
The millivolt and voltage function of the Meter can be used with
an optional mV/A output Current Probe to measure currents that
exceed the rating of the Meter. Make sure the Meter has the
correct function selected, AC or DC, for your current probe.
Refer to a Fluke catalog or contact your local Fluke
representative for compatible current clamps.
edy14f.eps

True-rms Multimeters
Making Basic Measurements
15
Measuring Capacitance (115 only)
edy05f.eps
Measuring Frequency (115 only)
XW Warning
To avoid electrical shock, disregard the bar
graph for frequencies >1 kHz. If the frequency
of the measured signal is >1 kHz, the bar
graph and are unspecified.
VoltAlert
AC Voltage Frequency AC Current Frequency
Hz
edy09f.eps

110 PLUS and 115
Users Manual
16
The Meter measures the frequency of a signal by counting the
number of times the signal crosses a trigger level each second.
The trigger level is 0 V, 0 A for all ranges.
Press to turn the frequency measurement function on and
off. Frequency works with ac functions only.
In frequency, the bar graph and range annunciator indicate the
ac voltage or current present.
Select progressively lower ranges using manual ranging for a
stable reading.
Low Impedance Capacitance Measurements
(115 only)
For making capacitance measurements on cables with ghost
voltage, hold while turning on the Meter to switch the
Meter into LoZ, (low input impedance) Capacitance mode. In
this mode, capacitance measurements will have a lower
accuracy and lower dynamic range. This setting is not saved
when the Meter is turned off or goes into sleep mode.
Testing Diodes (115 only)
Forward Bias
Single
Beep
Reverse Bias
Shorted
and
Open
Bad Diode Bad Diode
Good Diode Good Diode
edy07f.eps