Keysight U1241C Bedienungsanleitung

Keysight U1241C/

U1242C Handheld

Digital Multimeter

Quick Start

Guide

2 Keysight U1241C/U1242C Quick Start Guide

Safety Notices

CAUTION

A CAUTION notice denotes a

hazard. It calls attention to an

operating procedure, practice,

or the like that, if not correctly

performed or adhered to,

could result in damage to the

product or loss of important

data. Do not proceed beyond a

CAUTION notice until the

indicated conditions are fully

understood and met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in personal injury or

death. Do not proceed beyond a

WARNING notice until the

indicated conditions are fully

understood and met.

Safety Information

The U1241C/U1242C is

safety-certified in compliance with

IEC/EN 61010-1, IEC/EN

61010-2-033, CAN/CSA-C22.2 No.

61010-1, CAN/CSA-C22.2 No.

61010-033, ANSI/UL 61010-1, and

ANSI/UL 61010-033. Use with

standard or compatible test probes.

EMC Information

The U1241C/U1242C is

EMC-certified in compliance with

with IEC 61326-1/EN 61326-1,

ICES/NMB-001, and AS/NZS

CISPR 11.

Safety symbols

Earth (ground) terminal

Equipment protected

throughout by double

insulation or reinforced

insulation

Caution, risk of danger

(refer to this manual for

specific Warning or

Caution information)

CAT III

1000 V

Category III 1000 V

overvoltage protection

CAT IV

600 V

Category IV 600 V

overvoltage protection

2 Keysight U1241C/U1242C Quick Start Guide

For further safety information details, refer to the

Keysight U1241C/U1242C Handheld Digital Multimeter

User’s Guide.

Keysight U1241C/U1242C Quick Start Guide 3

Standard Accessories

The following accessories are shipped standard

with the U1241C/U1242C multimeters:

– 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.

NOTE

– The descriptions and instructions in this guide

apply to the U1241C and U1242C Handheld

Digital Multimeters.

– The model U1242C appears in all illustrations.

– All related documents and software are

available for download at

www.keysight.com/find/hhTechLib.

NOTE

Your multimeter is capable of receiving remote

commands and performing remote data logging. To

use these features, you will need an IR-to-USB

cable (included in the shipment) or an

IR-to-Bluetooth®adapter (U1117A, purchased

separately), and the Keysight Handheld Meter

Logger Software (downloadable from

www.keysight.com/find/hhmeterlogger).

4 Keysight U1241C/U1242C Quick Start Guide

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.

3 4

Keysight U1241C/U1242C Quick Start Guide 5

The Multimeter at a Glance

Vsense red LED indicator

Display screen

Keypad

Rotary switch

Input terminals

IR communication port

Test lead/probe holders

Battery access

(under the tilt stand)

Tilt stand

Fuse access

(under the tilt stand)

Flashlight

6 Keysight U1241C/U1242C Quick Start Guide

Using the Rotary Switch

Legend Measurement function

Model

U1241C U1242C

ZLOW (low input impedance) AC/DC V for

checking stray voltages —✔

AC V/Harmonic ratio[a] ✔✔

DC V ✔✔

Resistance/Continuity ✔✔

Diode/Capacitance ✔✔

AC or DC μA and mA ✔✔

AC or DC A ✔✔

T1 temperature/T2 and T1–T2 temperature[a]

or AC/DC mV (when enabled from the Setup

“CoUP” menu)

✔✔

[a] For U1242C only.

LOW

WARNING

Remove the test leads from the measuring source or

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 7

Using the Keypad

Legend

Key response when pressed for:

Less than 1 second More than 1 second

Enables the frequency test

mode.

Starts, stops, and exits the Max/

Min/Avg recording.

Sets the Null/Relative mode. Toggles on/off non-contact

voltage detection (Vsense).

— Sets a manual range.

— Switches between

environment temperature

compensation (ETC) and

non-ETC for temperature

measurements.

— Changes the Vsense detector

sensitivity.

Enables autoranging.

— Freezes the present reading in

the display (TrigHold mode).

— Automatically freezes the

present reading once the

reading is stable (AutoHold

mode; when enabled from the

multimeter’s Setup mode).

Press again to exit

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.

Starts and stops data logging.

Turns the backlight on/off. Turns the flashlight on/off.

MaxMin

Vsense

Range

Auto

Hold

Log

Hold

Log

8 Keysight U1241C/U1242C Quick Start Guide

— Switches between the regular

and shifted (icon printed in

orange) functions.

— Enables the Scan mode for

temperature measurements

(U1242C only).

— Enters and exits the data log

review mode (with the Hold

mode disabled).

— Exits the TrigHold or AutoHold

mode.

— Enters the Setup mode (while

turning the rotary switch from

OFF to on), and exits the Setup

mode.

Legend

Key response when pressed for:

Less than 1 second More than 1 second

Shift

Esc

View

Keysight U1241C/U1242C Quick Start Guide 9

Using the Input Terminals

WARNING

To avoid damaging this device, do not exceed the input

limit.

Rotary

position Input terminals Overload protection

1000 Vrms

1000 Vrms for short circuit <0.3 A

440 mA/1000 V, fast-acting fuse

11 A/1000 V, fast-acting fuse

LOW

COM

10 Keysight U1241C/U1242C Quick Start Guide

Hazardous Signal Warnings

Hazardous voltage indication

The multimeter will display the hazardous voltage

( ) symbol as an early precaution when the

measured voltage is:

This symbol will also be displayed when the input

signal exceeds the limitation of measuring circuit

as frequency dependence.

Hazardous current indication

The multimeter will display the symbol as an

early precaution when the measured current has

reached the maximum fuse rating as follows:

Measurement DC AC

V (mV) ≥+30 V or +OL (voltage

overload) ≤–30 V or –OL ≥ 30 V or OL

Measurement DC AC

A≥+11 A or +OL (current

overload) ≤–11 A or –OL ≥ 11 A or OL

μA/mA ≥440 mA or +OL ≤–440 mA or –OL ≥ 440 mA or

CAUTION

If your measuring current is > 10 A ~ 19.999 A, you

will need to lower the current within a 30 seconds

time limitation to avoid blowing the multimeter’s

fuse.

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