Fluke ScopeMeter 125 User manual

®
Fluke 125
Industrial ScopeMeter
Getting Started
GB
Dec 2006
© 2006 Fluke Corporation, All rights reserved. Printed in The Netherlands
All product names are trademarks of their respective companies.

Contents of the Fluke 125 Test Tool Kit
(2x)
(2x)
(3x)
19
3
2
4
5
6
7
8
10
11
14
12
13
15
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8
Figure 1. Fluke 125 Test Tool Kit

1
Getting Started
Introduction
This Getting Started Manual provides basic information
on the Fluke 125 ScopeMeter Test Tool. For complete
operating instructions, refer to the Users Manual on the
accompanying CD-ROM
Contacting a Service Center
To locate a Fluke authorized service center, visit us on
the World Wide Web at: www.fluke.com
or call Fluke using any of the phone numbers listed
below:
[phone] in the U.S.A and Canada
[phone] in Europe
[phone] from other countries.
Safety Information: Read First
The Fluke 125 ScopeMeter Test Tool (hereafter referred
to as “Test Tool”) complies with:
•ANSI/ISA-82.02.01
•EN/IEC 61010-1: 2001 600 V Measurement
Category III, Pollution Degree 2
•CAN/CSA-C22.2 No.61010-1-04 (including
CCSAUS approval)
Use the Test Tool only as specified in the Users Manual.
Otherwise, the protection provided by the Test Tool might
be impaired.
A Warning identifies conditions and actions that pose
hazard(s) to the user. A Caution identifies conditions and
actions that may damage the Test Tool.

Fluke 125
Getting Started
2
Warning
To avoid electrical shock or fire:
•Use only the power supply, Model PM8907
(Battery Charger / Power Adapter).
•Before use check that the selected/indicated
voltage range on the PM8907 matches the
local line power voltage and frequency.
•For the PM8907/808 universal Battery
Charger/Power Adapter use only line cords
that comply with the local safety regulations.
Note
To accommodate connection to various line power
sockets, the PM8907/808 universal Battery Charger /
Power Adapter is equipped with a male plug that must
be connected to a line cord appropriate for local use.
Since the adapter is isolated, the line cord does not
need to be equipped with a terminal for connection to
protective ground. Since line cords with a protective
grounding terminal are more commonly available you
might consider using these anyhow.
The 230V rating of the PM8907/808 is not for use in
North America. A line plug adapter complying with the
applicable National Requirements may be provided to
alter the blade configurations for a specific country.
Warning
To avoid electrical shock or fire if a Test Tool
input is connected to more than 42 V peak (30
Vrms) or on circuits of more than 4800 VA:
•Use only insulated voltage probes, test leads
and adapters supplied with the Test Tool, or
indicated as suitable for the Fluke 125 Test
Tool.
•Before use, inspect voltage probes, test leads
and accessories for mechanical damage and
replace when damaged.
•Remove all probes, test leads and
accessories that are not in use.
•Always connect the battery charger first to
the ac outlet before connecting it to the Test
Tool.
•Do not apply input voltages above the rating
of the instrument. Use caution when using 1:1
test leads because the probe tip voltage will
be directly transmitted to the Test Tool.
•Do not use exposed metal BNC or banana
plug connectors.
•Do not insert metal objects into connectors.
•Always use the Test Tool only in the manner
specified.

Getting Started
Preparing for Use
3
Max. Input Voltages
Input A and B directly ...............................600 V CAT III
Input A and B via BB120 ..........................300 V CAT III
Input A and B via STL120.........................600 V CAT III
Max. Floating Voltage
From any terminal to ground ....................600 V CAT III
Voltage ratings are given as “working voltage”. They
should be read as Vac-rms (50-60 Hz) for AC sine
wave applications and as Vdc for DC applications.
Measurement Category III refers to distribution level and
fixed installation circuits inside a building.
The isolated input connectors have no exposed metal and
are fully insulated to protect against electrical shock.
If Safety Features are Impaired
Use of the Test Tool in a manner not specified may
impair the protection provided by the equipment.
Before use, inspect the test leads for mechanical damage
and replace damaged test leads!
Whenever it is likely that safety has been impaired, the
Test Tool must be turned off and disconnected from the
line power. The matter should then be referred to qualified
personnel. Safety is likely to be impaired if, for example,
the Test Tool fails to perform the intended measurements
or shows visible damage.
Preparing for Use
At delivery, the installed rechargeable batteries may be
empty. To reach full charge they must be charged for 7
hours with the Test Tool turned off:
•use only the supplied Battery Charger/Power Adapter
model PM8907
•before use check that the PM8907 voltage and
frequency range match the local line power range
•connect the battery charger to the ac outlet
•connect the battery charger to the POWER ADAPTER
input on the right-hand side of the Test Tool.
Caution
To prevent decrease of the battery capacity,
you must charge the batteries at least once a
year.

Fluke 125
Getting Started
4
Powering/Resetting the Test Tool
Turning power on/off:
The Test Tool powers up in its last
setup configuration.
Resetting the Test Tool to the factory (default) settings:
+ Turn power off, then press and hold the
Backlight key and turn on again. You
should hear a double beep.
Changing Backlight and Contrast
To save battery power, the screen can be set to an
economic brightness display when operated on the battery
pack (with no power adapter connected).
Note
Using dimmed display lengthens maximum
battery power operation time.
To change the brightness and contrast:
Open the LIGHT/CONTRAST button
bar.
Press LIGHT.
Dim / Brighten the backlight.
Press CONTRAST.
Adjust the Contrast of the display.
Reading the Screen
The screen is divided into three areas that are indicated in
Figure 2. The areas are:
Reading area (A):Displays the numeric readings. If
only input A is on, you will see the input A readings only. If
input B is on you will also see the input B readings.
Waveform area (B): Displays the Input A(B) waveform.
The trace identifier (A) is visible on the left of the
waveform. The zero icon (-) identifies the ground level of
the waveform. The bottom line displays the ranges / div
and the power indicator (line or battery).
Note:
When battery powered, the battery indicator
informs you about the condition of the battery
from full to empty:

Getting Started
Making Menu Selections
5
Menu area (C): Displays the menu that provides choices
available through the blue arrow keys and the ENTER key:
+
Figure 2. The Screen Area's
Making Menu Selections
Selection of a function in the menu is done as follows:
A menu pops up after operation of, for
instance, the MENU key.
Use the arrow keys to highlight for
example the SCOPE/METER mode.
Press ENTER to confirm the selection.
The input A measurements menu pops up.
Use the arrow keys to highlight the desired
measurement function.
Press ENTER to confirm the selection.

Fluke 125
Getting Started
6
Input Connections and Grounding
For Voltage measurements use the Shielded Test Leads
on Input A (red) and/or Input B (grey).
For Current measurements use a current probe on Input
A and/or Input B.
For Power measurements use a voltage probe on Input A
and a current probe on Input B.
For Temperature measurements use a 1 mV/°C or
1 mV/°F temperature probe (optional) on Input A and/or
Input B.
For OHMΩ, CONTinuity, DIODE, and CAPacitance
measurements (Meter mode) use the Red Shielded Test
Lead at Input A and the Long Black Ground Lead at Input
COM (Common).
For low frequency measurements and high signal
levels, use the Black COM (Common) Input as single
ground. Figure 3 shows this.
For measurements at higher frequencies up to 10 MHz
or low levels, use both Shielded Test Leads with Short
Ground Leads instead of using the COM Input.
For measurements at frequencies above 10 MHz use the
VP40 10:1 probe with a short ground lead.
Bear in mind that the Short Ground Leads must be
connected to the same potential! Refer to Figure 4.
Figure 3. Grounding with Unshielded Ground Lead.
Figure 4. Grounding with Short Ground Leads
Warning
To avoid electrical shock or fire, use only one
COM (common) connection , or ensure that
all connections to COM are at the same
potential.

Getting Started
Displaying an Unknown Signal with Connect-and-View™ (Auto Set)
7
Displaying an Unknown Signal with
Connect-and-View™ (Auto Set)
The Connect-and-View™ function enables hands-off
operation to display complex unknown signals in
SCOPE/METER mode. This function optimizes the
position, range, time base, and triggering and assures a
stable display on nearly all waveforms. If the signal
changes, the setup will track these changes.
To enable the Connect-and-View™ function, do the
following:
•Connect the red test lead from red Input A to the
unknown signal to be measured
Perform an Auto Set.
Certain details of the waveform can be made visible by
manually changing amplitude, time base, waveform
position, and triggering. How to do that is explained in the
course of this Guide.
Freezing the Screen
You can freeze the screen (Waveforms and Readings)
with the HOLD/RUN key. This allows you read the screen
while the Test Tool has been disconnected from the
Device to be checked.
Freeze the screen. HOLD appears in
the bottom of the reading screen.
Start the measurement again.
Scope/Meter Measurements
Make the input connections as described on page 6.
Selecting the SCOPE/METER mode
Open the application mode menu.
Highlight SCOPE/METER
Enter the SCOPE/METER mode.

Fluke 125
Getting Started
8
Scope Measurements on Input A and B
Choose ac voltage (Vac) measurement for Input A:
Open the A MEASUREMENTS menu.
Highlight Vac.
Press ENTER to confirm the selection.
Observe that Vac (rms V∼) is now the Main Reading. The
former Main Reading has now moved to the smaller
Secondary Reading Position. Figure 5 shows this.
Then choose Peak-to-Peak Reading for Input B:
Open the B MEASUREMENTS menu.
Highlight ON.
Turn INPUT B on.
Highlight PEAK ... .
Open the PEAK Submenu.
Highlight PEAK-PEAK.
Press ENTER to confirm the selection.
Now you will see a screen like in Figure 5. The A and B
traces give a graphical representation of the waveforms
applied to Input A and Input B.
Figure 5. Measurements on Input A and Input B

Getting Started
Scope/Meter Measurements
9
Changing the Waveform Representation
Changing the amplitude:
Enlarge or reduce the waveform amplitude;
there are separate keys for Input A and
Input B.
Changing the Time Base:
Increase or decrease the number of
periods.
Positioning the traces:
Select A MOVE or B MOVE.
Position the selected waveform to the
desired screen position.
Trigger adjustments:
Triggering tells the Test Tool when to begin displaying the
waveform. The trigger point on the waveform is indicated
by the Trigger Identifier ( ). Trigger Level and the Trigger
Slope can be adjusted to your personal taste. This may
help to get certain signal details within the viewing area:
Enables the arrow keys for Trigger Level
and Slope.
Adjust the Trigger Level.
Select Negative / Positive Slope.
Making Cursor Measurements
Cursors allow you to make precise digital measurements
on live and on saved waveforms.
Display the cursor key functions:
Select Cursor measurement type:
Measure signal height at one point of time.
Measure signal height difference between
two points of time and measure time
difference between these two points.
Measure signal height at the cursor
positions and between cursor positions.
Measure rise time or fall time.

Fluke 125
Getting Started
10
Select the cursor to be moved. Use the
blue arrow keys to move the cursors
Depending on cursor measurement type:
Cursor measurements on trace A or B.
Automatic or manual risetime
measurement on a single channel.
Switch cursor measurements off.
Input A and Input B Measurement Menu
•In the Input A and input B measurement
menu you can choose from many
measurement functions. Selection is
done with the arrow keys and activated
with F4.
•The function keys F1, F2, and F3 give
access to submenus:
INPUT ...
•PROBE: SELECT…: for selection of the
correct probe type.
•PROBE: AC ADJUST…: for adjustment
of 10:1 voltage probes other than the
probe supplied with Fluke 125. This is
necessary for correct high frequency
measurements.
•COUPLING: DC: DC coupled input
•COUPLING: AC: AC coupled input
•WAVEFORM: NORMAL: normal
waveform display.
•WAVEFORM: INVERT: inverted
waveform display.
ZERO
turns relative measurements on/off. The
reading at turning on becomes the zero
value, next readings are results compared
to the zero value.
TOUCH HOLD
captures and freezes a stable
measurement result. A beep indicates this.
Press (TOUCH HOLD OFF) to return
to normal measurement mode.

Getting Started
Scope/Meter Measurements
11
Trigger Options
Open the application mode menu.
Open the TRIGGER menu:
INPUT:
•A, B: Triggering on the input A or input B
waveform.
•EXT: external triggering via an optically
isolated trigger probe.
•VIDEO on A…: triggering on video
signals via input A.
UPDATE:
•FREE RUN: gives automatic screen
update even if there are no triggers.
•ON TRIG.: only gives screen update
when valid triggers occur.
•SINGLE: can be used to catch single
events.
•ROLL : is useful for monitoring lower
frequency waveforms.
AUTO RANGE :
•>15Hz, >1Hz: selection of Auto Set on
signals >15 Hz (fast response) or >1 Hz
(slower).
Waveform/Reading Smooth Options
Open the application mode menu.
Open the SMOOTH menu:
WAVEFORM:
•ENVELOPE: envelope records all values
of live waveforms. On the screen the
resultant envelope is displayed.
•NORMAL: the mode most commonly
used.
•SMOOTH: is used to suppress noise.
READING A: B:
•FAST: high reading update rate
•NORMAL: the mode most commonly
used
•SMOOTH: low reading update rate

Fluke 125
Getting Started
12
Harmonics Measurements
Use a voltage probe on Input A and a current probe on
Input B.
Selecting the Harmonics mode
Open the application mode menu.
Highlight HARMONICS
Enter the harmonics mode.
If the Input A probe setting is not V (voltage), or the input
B probe setting is not (m)V/A (current), a probe menu
pops up to enable you to select the required probe.
Selecting the Probe Type
Open the PROBE on A or the PROBE
on B menu, then select the probe type.
Harmonics Screen Softkey Functions
The harmonics screen shows a softkey button bar like the
one shown below:
The harmonics screen F1…F4 key functions are:
Show the voltage (VOLT) harmonics, the
current (AMP) harmonics, or the power
(WATT) harmonics.
Select %f to display harmonics bars as a
percentage of fundamental voltage.
Select %r to display harmonics bars as a
percentage of the total of harmonic
voltages (V rms).
Show the bars screen.
Show the waveform screen.
Set cursors ON or OFF.
Cursors allow you to make precise digital
measurements on the bars screen.
Use the keys to move the cursor sign
<|> on top of a harmonic bar. The display
shows the readings of the marked bar.

Getting Started
Fieldbus Measurements
13
Fieldbus Measurements
Connect the bus to Input A, and depending on the bus
type also to input B.
Selecting the Fieldbus Mode and Bus Type
Choose for example the Modbus, subtype IEA-232/
RS-232:
Open the application mode menu.
Highlight BUSHEALTH
Enter the BUSHEALTH mode.
Highlight Modbus…. The dots ... behind a
bus type indicate that a submenu will
follow on this selection.
Open the MODBUS submenu.
Highlight IEA-232/ RS-232
Press ENTER to confirm the selection.
Bus Health Screen
The following icons are used to indicate the bus
measurement status:
bus activity indicators.
Bus activity indicator 1:
Q(filled) : voltage measured
{(open) : no voltage measured
Bus activity indicators 2and 3:
{{(both open) : no activity
ÑÑ(blinking) : activity
Busy, the tester is measuring/
processing data.
No reading available.
Result OK .
Warning. Result on edge of limits
Result not OK.

Fluke 125
Getting Started
14
Bus Health Screen Softkey Functions
The bus health screen shows a softkey button bar like the
one shown below:
Select the Limit Setup function, see below.
Select the voltage level reading.
Select the distortion type reading.
Display the signal eye-pattern.
Setting up the Limits
To set up the test limits of the current bus type, do the
following:
Select the SETUP LIMITS… menu from the
bus health screen.
Select the signal property.
Select the LOW, HIGH, or WARNING level.
Change the limit. Continue with other limits.
Press DEFAULTS to set all limits to
the default value.
Accept the limits.
To save and recall saved test limit sets see SAVE / PRINT
Functions on page 16.

Getting Started
Plotting Measurements over Time (TrendplotTM)
15
Plotting Measurements over Time
(TrendplotTM)
The TrendPlot™ function plots a graph derived from the
MAIN (large) readings in the SCOPE/METER mode or in
the HARMONICS mode as a function of time.
Turning the Trendplot Mode On/Off
Open the application mode menu.
Highlight TRENDPLOT
Start a Trendplot.
Trendplot Screen Softkey Functions
Stop the Trendplot.
TREND RESTART: Start a new Trendplot.
MIN MAX AVERAGE: Secondary (small)
reading is the minimum, maximum, or
average value since the Trendplot start.
CURSOR ON OFF: Turn cursor
measurements on/off (only possible if
screen is frozen). See also Making Cursor
Measurements on page 9.

Fluke 125
Getting Started
16
User Options Menu
•USER OPTIONS gives submenus to
configure the Test Tool to your personal
taste.
•The function keys F1, F2, and F3 give
access to submenus:
BATTERY REFRESH.. : should be done
about four times a year to keep the batteries
in optimal condition.
LANGUAGE: the language of messages
can be selected in this submenu.
VERSION & CAL ... shows version and
calibration information.
SAVE / PRINT Functions
Show the PRINT SCREEN, RECALL
DELETE… and SAVE… key labels.
PRINT SCREEN: The active screen is
printed. See User Options Menu to select
the printer type and the baud rate.
RECALL DELETE…: opens a menu that
enables you to delete to rename or to
recall a dataset.
SAVE…: opens a menu that enables you
to save a dataset.
A data set consists of the screen capture, the trace, and
the test tool setup.