Category III 1000 V CAT III 1000 V overvoltage protection Category IV 600 V CAT IV 600 V overvoltage protection For further safety information details, refer to the Keysight U1241C/U1242C Handheld Digital Multimeter User’s Guide. Keysight U1241C/U1242C Quick Start Guide...
– Test leads (red and black) – IR-to-USB cable – Four 1.5 V AAA batteries – Printed copy of the U1241C/U1242C Quick Start Guide (this document) – Printed copy of the Certificate of Calibration If any item is missing or damaged, keep the shipping materials and contact the nearest Keysight Sales Office.
Install or Change the Batteries The multimeter is powered by four 1.5 V AAA batteries (included in the shipment). Turn On the Multimeter Turn the rotary switch from the position to any other position to start making measurements. Keysight U1241C/U1242C Quick Start Guide...
The Multimeter at a Glance Vsense red LED indicator Display screen Keypad Rotary switch Input terminals Flashlight IR communication port Test lead/probe holders Battery access (under the tilt stand) Tilt stand Fuse access (under the tilt stand) Keysight U1241C/U1242C Quick Start Guide...
[a] For U1242C only. Remove the test leads from the measuring source or WARNING target before changing the rotary switch position. Refer to the U1241C/U1242C User’s Guide for a complete list and description of all rotary switch labels. Keysight U1241C/U1242C Quick Start Guide...
Starts and stops data logging. Hold Hold this mode. — Stores a record of the measured signal and exports it via the multimeter’s optical communication port. — Restarts the Max/Min/Avg recording. Turns the backlight on/off. Turns the flashlight on/off. Keysight U1241C/U1242C Quick Start Guide...
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— Exits the TrigHold or AutoHold orange) functions. View mode. Shift — Enables the Scan mode for — Enters the Setup mode (while temperature measurements turning the rotary switch from (U1242C only). OFF to on), and exits the Setup mode. Keysight U1241C/U1242C Quick Start Guide...
To avoid damaging this device, do not exceed the input WARNING limit. Rotary Input terminals Overload protection position 1000 Vrms 1000 Vrms for short circuit <0.3 A 440 mA/1000 V, fast-acting fuse 11 A/1000 V, fast-acting fuse Keysight U1241C/U1242C Quick Start Guide...
–440 mA or –OL If your measuring current is > 10 A ~ 19.999 A, you CAUTION will need to lower the current within a 30 seconds time limitation to avoid blowing the multimeter’s fuse. Keysight U1241C/U1242C Quick Start Guide...
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– the rotary switch is set to the current measurement position but no lead is inserted into its respective input terminal. The secondary display will show , and the warning alert will stop after 3 seconds approximately. Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Voltage Measurements Measuring AC voltage Vsense U1242C True RMS Multimeter Auto MaxMin Vsense Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
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AC V (true rms) AC V (averaging sense) Harmonic ratio with Harmonic ratio with AC V (true rms) AC V (averaging sense) [1] Averaging sense AC measurements apply to sine wave inputs when measuring linear loads. Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Measuring DC voltage Vsense U1242C True RMS Multimeter Vsense Auto MaxMin Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
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Do not use the Z function to measure voltages CAUTION in circuits that could be damaged by this function’s low impedance (≈2 kΩ). DC voltage reading AC voltage reading Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Current Measurements Never attempt an in-circuit current measurement WARNING where the open-circuit potential to earth is >1000 V. Measuring DC current Keysight U1241C/U1242C Quick Start Guide...
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All manuals and user guides at all-guides.com Measuring AC current Cycling through different current measurements mA % View Shift (For Averaging sense True RMS [1] For U1242C only. Keysight U1241C/U1242C Quick Start Guide...
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Using a low pass frequency filter ( ) for frequency measurements The filter blocks unwanted frequency (~ 1 kHz) while the multimeter continues measuring voltage/current via the selected averaging sense or true rms function. MaxMin Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Resistance Measurement Vsense U1242C True RMS Multimeter MaxMin Vsense Auto Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Removing test lead resistance Vsense Keysight U1241C/U1242C Quick Start Guide...
If resistance < threshold, beeper sounds and red LED indicator lights up Vsense U1242C True RMS Multimeter (open) MaxMin Vsense Auto Range View (closed) View Shift Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
(for 0.3 V to 0.8 V) – continuous beep (for <0.05 V) Vsense U1242C True RMS Multimeter MaxMin Vsense Auto Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Reverse bias Vsense U1242C True RMS Multimeter MaxMin Vsense Auto Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
U1242C True RMS Multimeter MaxMin Vsense Auto Range View Hold Shift CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Type-K thermocouple probe Cycling through different temperature measurements (U1242C only): View Shift Scan Keysight U1241C/U1242C Quick Start Guide...
True RMS Multimeter beeper sounds Changing the Vsense Vsense detector’s sensitivity: MaxMin Vsense Auto Range Auto View > 1 sec Hold Shift Press Range CAT IV 600V 10A MAX FUSED CAT III 1000V 440mA FUSED Keysight U1241C/U1242C Quick Start Guide...
All manuals and user guides at all-guides.com Measurement Data Recording and Review Recording measurement data (manual log) > 1 sec Hold Refer to the U1241C/U1242C User’s Guide for other NOTE data recording options. Viewing the recorded data View > 1 sec...
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All manuals and user guides at all-guides.com Cycling through previously stored records View Shift Manual logging data Export logging data Interval logging data Event logging data Keysight U1241C/U1242C Quick Start Guide...
Viewing stored entries Viewing next and previous Viewing first and last stored stored entries entries Vsense MaxMin Auto Range Clearing stored entries Clear the last Hold stored entry > 1 sec Clear all stored entries Keysight U1241C/U1242C Quick Start Guide...
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