Philips pm2521 - Page 14

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INTRODUCTION
The PM 2521 is a microcomputer controlled digital multimeter. The type of microcomputer used is a 8035
with a 4k external ROM. Thanks to the microcomputer extra measuring functions are incorporated, in
addition to the standard multimeter measuring functions. These extra measuring functions make it possible
to measure the standard multimeter measuring signals in other units.
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The standard multimeter functions of the PM 2521 are:
Alternating voltage (V ~ rms) Direct current (A-^r- )
Direct voltage (V —) Diodes ( ->p )
Alternating current (A ~ rms) Resistance (Q.)
The extra measuring functions of the PM 2521 are:
Temperature Pt-100 (°C) Trigger level (+/—)
Frequency {Hz} Decibels (dB)
Time (s) ^ Relative reference (zero set)
A combination of the trigger level function and the time or frequency function, make selective measurements
possible.
The trigger level function itself also enables peak voltage measurements.
The relative reference function offers the possibility to select a predetermined relative reference point.
Each subsequent reading will indicate the positive and negative deviation of the relative reference level.
Each measuring function is subdivided into a number of ranges. For range switching a selection can be made
between manual or automatic range selection.
To get an optimum reading in the ac ranges an ac coupled rms convertor is built in the PM 2521.
The periodical self calibration of the PM 2521 ensures high accuracy over a long working period.
The PM 2521 is equipped with a 5 digit display. As display a liquid crystal display is used. It gives a very
clear reading, especially under strong light conditions.
Ordering number for the instruction sticker is 9499 470 16401
ST 3523