Temperature Measurements In Relative Reference Mode (Zero Set); Frequency Measurements (Hz) - Philips PM2521 Gebrauchsanleitung

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TEMPERATURE MEASUREMENTS IN RELATIVE REFERENCE MODE (ZERO SET)
— Measure the temperature 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 vakjefohich 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 mode (ZERO SET). In the relative reference mode the
PM 2521 switches to manual ranging*. Each subsequent reading will indicate the positive or negative deviation
from the relative reference value.
— To leave the relative reference mode depress pushbutton ZERO set again.
6.4.1.9. Frequency measurements (Hz)
*
GENERAL "
The frequency measurements in the PM 2521 are made in conjunction with the trigger level function. Each
time the input signal exceeds the trigger level a count is made. As the trigger can be adjusted, it is important
to know where the trigger level is and if triggering takes place before frequency measurements are made.
The order for measuring the frequency of a signal is as follows:
— Selection of the sensitivity range.
— Selection of the trigger level
— Measurement of the frequency
FREQUENCY MEASUREMENTS
Selection of the sensitivity range
— Select function with the function selector. *
— Select the automatic ranging mode by depressing the AUTO/MAN* pushbutton.
Remark:
Manual ranging is indicated with * on the display.
— Connect the voltage source to the 0 and V terminal and measure the input signal.
— Make a note of the selected range and polarity. Slow signals may pass more than one range.
* — Select function trigger level with the function selector and select one of the noted ranges and polarity.
Remark:
Ranges
Trigger level
200 mV 2 V
2
V
20 V 20 V
200
V
200 V
2000 V 2000 V
Input signals that are lower than 7,5 % of the end of range value of the trigger level range cannot be triggered
accurately.
In the trigger level function only manual ranging is possible with the pushbuttons UP or DOWN.
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