Keysight U1191A User manual
Verify that you received the following items in the shipment of
your clamp meter:
✔One pair of red and black test leads
✔Two 1.5 V AAA alkaline batteries
✔One K-type thermocouple (U1194A only)
✔One soft carrying case
✔Printed copies of the Certificate of Calibration (CoC) and
the U1190A Series Quick Start Guide (this manual)
If any item is missing or damaged, keep the shipping materials
and contact the nearest Keysight Sales Office.
NOTE
The descriptions and instructions in this guide apply to the
U1191A, U1192A, U1193A, and U1194A handheld clamp
meters.
The model U1194A appears in all illustrations.
All related documents and software are available for download
at www.keysight.com/find/hhTechLib.
Quick Start Guide
Keysight U1190A Series
Handheld Clamp Meter
U1190A Series Handheld Clamp Meter
Install the Batteries
2 U1190A Series Quick Start Guide
Install the Batteries
Your clamp meter is powered by two
1.5 V AAA alkaline batteries (included
with the shipment).
1Turn the clamp meter OFF and remove
the test leads from the terminals.
2Loosen the screw on the battery cover
with a suitable Phillips screwdriver.
3Remove the battery cover and observe
the polarity markings.
4Insert the batteries and replace the
battery cover and screw.
Power ON the Clamp Meter
To power ON your clamp meter,
turn the rotary switch from the
OFF position to any other posi-
tion.
Using the Wire Separator and Hook
Mesh of
wires or
cables
1Open the clamp jaw
slightly to reveal the
wire separator tip.
2Separate the
desired wire or
cable by hooking it
in the clamp jaw.
3Secure the
wire or cable
and read the
measurement.
U1190A Series Handheld Clamp Meter
The Clamp Meter at a Glance
U1190A Series Quick Start Guide 3
The Clamp Meter at a Glance
Hold/MaxMin button
Function buttons
Rotary switch
Display screen
Input terminals
Front view
Clamp jaw
Jaw markings
Handle
Battery cover
Flashlight
Hand guard
Rear view
U1190A Series Handheld Clamp Meter
Understanding the Rotary Switch
4 U1190A Series Quick Start Guide
Understanding the Rotary Switch
NOTE
Some rotary switch positions have a shifted function printed in
orange. Press to switch between the shifted and primary
function.
Legend Functions shown
in the primary display U1194A U1193A U1192A U1191A
Off ✔✔✔✔
AC A ✔✔✔✔
DC A ✔
Frequency
(current path) ✔✔✔
AC V ✔✔✔✔
Frequency
(voltage path) ✔✔✔
DC V ✔✔✔✔
Resistance ✔✔✔✔
Continuity ✔✔✔✔
Diode ✔✔✔✔
Capacitance ✔✔✔
Non-contact voltage
detector ✔✔✔
Temperature ✔
DC μA✔
AC μA✔
WARNING
Remove the test leads from the measuring source or
target before changing the rotary switch position.
U1190A Series Handheld Clamp Meter
Understanding the Function Buttons
U1190A Series Quick Start Guide 5
Understanding the Function Buttons
Non-contact voltage
detector (Vsense)
If the presence of AC voltage is
sensed, the clamp meter’s beeper
will sound.
Press to change the Vsense
sensitivity from Hi.SE (high sensi-
tivity) to Lo.SE (low sensitivity) and
vice versa.
Legend Key response when pressed for:
Less than 1 second More than 1 second
Freezes the present reading
in the display.
Records the maximum,
minimum, or average value.
Switches between the
primary and shifted functions. -
Turns the LCD backlight
on or off.
Turns the LED flashlight
on or off.[1]
[1] The LED flashlight function is available for U1194A/U1193A/U1192A models
only.
Sets the null/relative mode. -
Voltage could still be
present even if there is no
alert indication. Never
touch live voltages or
conductors without the
necessary insulation
protection.
3
4
Voltage source
AC
2
1
WARNING
U1190A Series Handheld Clamp Meter
Performing Measurements
6 U1190A Series Quick Start Guide
Performing Measurements
Current measurement
Press the handle to open the
clamp jaw. Clamp around a con-
ductor and ensure that the con-
ductor fits the markings on the
clamp jaw.
Press to cycle between AC
current, DC current, or to read
the frequency of the AC current.
Ensure that the test leads
are disconnected from the
input terminals when
measuring current with the
clamp meter’s jaw.
3
1
2
4
5
Conductor
WARNING
CAUTIONCAUTION
Ensure that the clamp meter measures only one conductor
at a time. Measuring multiple conductors may cause inac-
curacy in measurement reading due to the vector sum of
currents flowing in the conductors.
Current
flow
Current
flow
Correct Incorrect
✔✘
U1190A Series Handheld Clamp Meter
Performing Measurements
U1190A Series Quick Start Guide 7
AC voltage measurement
Set up your clamp meter to mea-
sure AC voltage as shown. Probe
the test points and read the dis-
play.
Press to measure the fre-
quency of the AC voltage source.
DC voltage measurement
Set up your clamp meter to mea-
sure DC voltage as shown. Probe
the test points and read the dis-
play.
2
4
AC
Voltage source
1
3
DC
3
Voltage source
1
2
U1190A Series Handheld Clamp Meter
Performing Measurements
8 U1190A Series Quick Start Guide
Resistance measurement
Set up your clamp meter to mea-
sure resistance as shown. Probe
the test points and read the dis-
play.
Continuity test
Set up your clamp meter to test
for continuity as shown. Press
to switch to the continuity
test function ( is shown on the
display).
To avoid possible damage to
your clamp meter or to the
equipment under test, dis-
connect the circuit power
and discharge all high-volt-
age capacitors before mea-
suring resistance or testing
for continuity.
The beeper will sound and the
backlight will flash when the
circuit-under-test is shorted.
3
Resistor
1
2
CAUTION
4
1
3
CLOSED
OPEN
2
NOTE
U1190A Series Handheld Clamp Meter
Performing Measurements
U1190A Series Quick Start Guide 9
Diode test
Set up your clamp meter to test
diodes as shown. Probe the test
points and read the display.
Capacitance measurement
Set up your clamp meter to mea-
sure capacitance as shown. Press
to switch to the capacitance
measurement function.
This test sends a current
through a semiconductor
junction, and then measures
the junction’s voltage drop. A
good diode allows current to
flow in one direction only.
To avoid possible damage to
the clamp meter or to the
equipment under test, dis-
connect circuit power and
discharge all high-voltage
capacitors before measur-
ing capacitance. Use the
DC V function to confirm
that the capacitor is fully
discharged.
3
Forward-bias
diode
1
2
NOTE
2
4
Capacitor
1
3
CAUTION
U1190A Series Handheld Clamp Meter
Performing Measurements
10 U1190A Series Quick Start Guide
Temperature
measurement (U1194A
only)
The clamp meter uses a
type-K thermocouple probe
for measuring temperature.
Press to switch to the
temperature measurement
function.
Current measurement
up to μA (U1194A only)
Set up your clamp meter to
measure low current as
shown. Press to switch to
the current measurement
function.
Do not connect the
thermocouple to
electrically live circuits.
Doing so will potentially
cause fire or electric
shock.
Always use the proper
function, range, and
terminals for current
measurements. Use the
clamp jaw for currents
above 600 μA.
2
4
1
3
K-type
thermocouple
probe
Heat source
WARNING
AC
2
4
1
Voltage source
DC
Voltage source
LOAD
3
LOAD
WARNING
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3
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