Philips pm2521 - 6.4.1.1. Direct voltage measurements (V.); DIRECT VOLTAGE MEASUREMENTS (STANDARD METHOD)

35
6.4. MEASURING
WARNING: It must be borne in mind that in all measurements the zero ^ of the PROBE-input is raised
to the same potential as that of the o-input socket.
Do not touch the zero of the PROBE-input during a measurement.
6.4.1. Standard measurements
6.4.1.1. Direct voltage measurements (V-r-r-r)
GENERAL
Direct voltages can be measured in two ways viz.:
— Direct voltage measurements (standard method),
— Direct voltage 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 voltage e.g.: +1.0000 V in the relative reference mode +1.0000 V will be displayed as +0.0000 V.
The subsequent measured voltages are e.g. +1.1000 V and +0.9000 V.
The values displayed will be respectively +0.1000 V and —0.1000 V
DIRECT VOLTAGE MEASUREMENTS (STANDARD METHOD)
— Select function with the function selector.
— Select the manual or automatic ranging mode with pushbutton AUTO/MAN*.
Remarks:
Manual ranging is indicated with a * on the display.
In automatic ranging mode the UP level is 20200 and the DOWN level is 01800.
H
— Select in manual ranging mode the correct range with pushbuttons UP or DOWN.
Remark:
Available ranges are: 200.00 mV
2.0000 V
20.000 V
200.00 V
* 2000.0 V
Overload is indicated with OL on the display (Display > 21000).
In range 2000 V overload is also indicated at 2100.0 V. However, the maximbm input voltage is 1000 V-r^r-r,
1400 V peak.
— Connect the voltage source to the 0 and V terminal.
Remark:
The polarity indicated is the polarity of the V terminal with respect to the 0 terminal.
Voltages from 1 kV upto 30 kV can be measured with the HT probe PM 9246.
Refer to chapter 6.4.2.1.