Philips pm2521 - 6.4.1.6. Resistance measurements (Ω); RESISTANCE MEASUREMENTS (STANDARD METHOD); RESISTANCE MEASUREMENTS IN RELATIVE REFERENCE MODE (ZERO SET)

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6.4.1.6. Resistance measurements (SI)
GENERAL
Resistances can be measured in two ways viz.:
— Resistances measurements (Standard method).
— Resistance measurements in relative reference mode.
The relative reference mode offers the possibility to select a predetermined relative zero reference level.
Each subsequent reading will indicate the positive or negative deviation from the relative reference value.
Example:
Measured resistance value is e.g. 1.2000 k£2. In relative reference mode 1.2000 kS"2 will be displayed as
0.0000 kf2. The subsequent measured resistance value are e.g. 1.2500 k£2 and 1.1500 k£2. The value displayed
will be respectively +0.0500 kJ2 and —0.0500 k£l
RESISTANCE MEASUREMENTS (STANDARD METHOD)
— Select function $ with the function selector.
— Select the manual or automatic ranging mode with pushbutton AUTO/MAN*.
Remark:
Manual ranging is indicated with a * on the display. In automatic ranging mode the LIP level is 20200 and the
DOWN level is 01800.
— Select in manual ranging mode the correct range with pushbuttons UP or DOWN.
Remark:
Available ranges are: 200.00 SI
2.0000 kJ2
20.000 kft
200.00 kfi
2.0000 Mft
20.000 Mft *
Overload is indicated with OL on the display (Display > 21000).
— Connect the unknown resistance to the 0 and SI terminal.
Protection:
The input is protected up to 265 V rms.
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RESISTANCE MEASUREMENTS IN RELATIVE REFERENCE MODE (ZERO SET)
— Measure the resistance value as described above.
— Depress pushbutton ZERO SET.
Remark:
The display will be held for one second and a Z will appear on the right-hand side of the display. The value
which is on the display during this one second is the relative reference value. After this one second the display
jumps to zero and the indication ZS will appear on the display. The PM 2521 has now been switched to the
relative reference (ZERO SET) mode. Each subsequent reading will indicate the positive or negative deviation
from the relative reference value. The maximum reading is 40000.
In the relative reference mode the PM 2521 switches to manual ranging *.
— To leave the relative reference mode, depress pushbutton ZERO SET again.