Directions For Use; Installation - Philips PM 5125 Manual

17
DIRECTIONS FOR USE
Installation
For coupling two or more modular units refer to chapter XIV.
A. ADJUSTMENT TO THE LOCAL MAINS VOLTAGE (See Fig. 4)
The instrument may be adjusted to a mains voltage of 100... 130 V or
200... 260 V by means of switch SK12 on the rear panel.
Incase of a mains voltage of 100... 130 V, the fuse VLI rated at 250 mA
(delayed action) should be replaced by a fuse with a 500 mA-rating
(delayed action).
B. EARTHING (See Figs. 4 and 5)
The instrument should be earthed in conformity with the local safety
regulations. This can be done:
a, via the supplied 3 -core mains cable,
b. via the earthing terminal BU12, marked ~, on the rear panel,
c. via [he earthing terminal BU6, marked 1, on the front panel.
NOTE: For operation as a single unit connect BU6 to BU7
The units of the modular system have asemi-floating circuit so that the
circuit need to be earthed at one point only when several units are coupled
together.
Earth currents which may give rise to hum are thus avoided.
The terminals BU6 and BU12 are connected to the metal frame of the
cabinet. The signal earth is connected directly of the terminals BU2,
BUS and BU7, marked -~-, and to the cabinet via a 100 kit resistor.
This provides the following output possibilities:
- output from a circuit which is earthed by linking BU7 (1) to BU6
(1)
- output from a circuit which is earthed via other coupled modules or via
auxiliary equipment.