Getting Started Tutorial | 1 |
The keypad at a glance
The operation of each key is shown below. Pressing a key illuminates a related symbol on the display and emits a beep from the multimeter. Turning the rotary switch to another position resets the current operation of the key.
Figure 1- 7 below shows the keypad of the U1252A. The ms% (Pulse width/Duty cycle), 
Hz 
, and frequency counter functions are only available on the U1252A.
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Figure 1-7 U1252A keypad
Table 1-2 Keypad desciption and functions
Button | Function when pressed for less than 1 second | Function when pressed for more than 1 second | |
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1 |
| acts as a toggle switch to turn backlit ON/OFF. | displays the battery capacity for 3 seconds. |
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| Backlit automatically turns off after 30s (default) [1]. |
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2 |
| freezes the measured value. In Data Hold | enters Dynamic Recording mode. Press |
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| mode, press again to trigger hold of the next measured | again to scroll through Max, Min, Avg, and present |
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| value. In Refresh Hold mode, reading updates | readings (indicated by MAXMINAVG on display). |
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| automatically once reading is stable and count setting |
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| is exceeded [1]. |
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3 |
| saves displayed value as a reference to be | enters 1 ms Peak Hold mode. Press |
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| subtracted from subsequent measurements. Press | to scroll through Max and Min peak readings. |
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| again to see the relative value that has been saved. | |
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Agilent U1251A/U1252A User’s and Service Guide | 9 |
