User`s guide

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Agilent Technologies

Agilent U1251B and U1252B

Handheld Digital Multimeter

Quick Start Guide

The following items are included with your multimeter:

If anything is missing or damaged, please contact the nearest Agilent Sales

Office.

✔ Silicone test leads

✔ Rechargeable 8.4 V battery (for

U1252B only)

✔ 4 mm probes

✔ Alligator clips

✔ Power cord and AC adapter (for

U1252B only)

✔ Printed Quick Start Guide

✔ Certificate of Calibration

✔ 9 V alkaline battery (for U1251B

only)

NOTE

Your multimeter is capable of remote data logging. To use this feature,

you will need an IR-USB cable (U1173A, purchased separately) and the

Agilent GUI Data Logger Software (downloadable from

www.agilent.com/find/hhTechLib).

WARNING

Ensure the terminal connections are correct for that

particular measurement selection before starting any

measurement. To avoid damage to the device, do not

exceed the input limit.

Summary of content (13 pages)

PAGE 1
Agilent U1251B and U1252B Handheld Digital Multimeter Quick Start Guide The following items are included with your multimeter: ✔ ✔ ✔ ✔ ✔ ✔ Silicone test leads 4 mm probes Alligator clips Printed Quick Start Guide ✔ Rechargeable 8.4 V battery (for U1252B only) ✔ Power cord and AC adapter (for U1252B only) Certificate of Calibration 9 V alkaline battery (for U1251B only) If anything is missing or damaged, please contact the nearest Agilent Sales Office.
PAGE 2
Charging the Battery Use the specified accessory, the 24 V DC adaptor to charge the battery. 1 Remove and disconnect the test leads from the meter. 2 Turn the rotary switch to the position. Connect the power cord to the DC adapter. 3 Plug the Red (+)/ Black (–) banana terminals of the DC adapter to the and the COM terminals respectively. The DC adaptor can be replaced with a DC power supply in order to set the 24 V DC output and the over current limitation to a value more than 0.5 A.
PAGE 3
CAU TI O N • Upon initial use (or after a prolonged storage period), the rechargeable battery may require three to four charge/discharge cycles before achieving maximum capacity. To discharge, simply run the multimeter under the rechargeable battery's power until it shuts down or the low battery warning appears. • The multimeter may indicate that charging is complete after ten minutes when charging a new rechargeable battery. This is a normal phenomenon with rechargeable batteries.
PAGE 4
Input Terminals and Overload Protection Measurement Functions Input Terminal Voltage Overload Protection COM Diode 1000 V R.M.S 1000 V R.M.S < 0.3 A short circuit current Resistance Capacitance Temperature Current (μA and mA) µA.
PAGE 5
Performing Voltage Measurements Measuring AC voltage 1 Set the rotary switch to . For and mode, press to ensure is shown on the display. 2 Connect the red and black test leads to input terminals V. mV (red) and COM (black) respectively. 3 Probe the test points and read the display. 4 Press to display dual measurements. Parameter can be switched consecutively.
PAGE 6
Using the Filter 1 To enter the Setup mode, switch off the meter, then turn the rotary knob to any non-OFF position while holding until you hear a beep. You may release once you hear the beep. 2 Press or to scroll through the menu items until FiLtE is shown in the secondary display. 3 Press 4 Press or to enable the Filter. to save your changes. 5 Press and hold until the meter restarts and returns to its normal operating mode.
PAGE 7
Performing Current Measurements To perform current measurements, set up your multimeter as shown in the figure below. For measuring DC current from a mixed signal in DC measurement mode, ensure that the Filter is enabled. Measuring AC current 1 Set the rotary switch to or . Press to ensure is shown on the display. 2 Connect the red and black test leads to input terminals µA.mA (red) and COM (black) or A (blue) and COM (black) respectively.
PAGE 8
Performing Resistance, Conductance, and Continuity Measurements Audible continuity 1 Set the rotary switch to . 2 Connect the red and black test leads to input terminals Ω (red) and COM (black) respectively. 3 Probe the test points (by shunting the resistor) and read the display. 4 Press to scroll through audible continuity, conductance, and resistance tests as shown.
PAGE 9
Performing Capacitance and Temperature Measurements Capacitance 1 Set the rotary switch to . 2 Connect the red and black test leads to input terminals (red) and COM (black) respectively. 3 Connect the red test lead to the positive terminal of the capacitor, and the black test lead to the negative terminal. 4 Read the display. Temperature 1 Set the rotary switch to . Press to select temperature measurement.
PAGE 10
Frequency and Frequency Counter Measurements Frequency Measurement During AC/DC voltage or AC/DC current measurements, you can measure the signal frequency by pressing at any time. Frequency Counter Measurement 1 Set the rotary switch to . 2 Press to select the frequency counter (Hz) function. “—1—” on the secondary display means the input signal frequency is divided by 1. This accommodates for higher frequency range of up to 985 kHz.
PAGE 11
Square Wave Output (for U1252B only) 1 Turn the rotary switch to . Default display setting is 600 Hz on secondary display and 50% duty cycle on primary display. 2 Press or to scroll through the available frequencies (there are 28 frequencies to choose from). 3 Press to select duty cycle (ms) on the primary display. 4 Press or to adjust the duty cycle. Duty cycle can be set for 256 steps and each step is 0.390625%. The display only indicates the best resolution with 0.001%.
PAGE 12
Safety Notices CAU TI O N 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. Safety Information This meter is safety-certified in compliance with EN/IEC 61010-1:2001, UL 61010-1 Second Edition and CAN/CSA 22.