Tabor 8020, Руководство пользователя

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5-1. INTRODUCTION
This section provides maintenance, service information,
and performance tests for the 8020 series and for the GPIB
option (option 1). Fuse replacement procedure, line voltage
selection and option installation procedure are also in-
cluded.
WARNING
The procedures described in this section are
for use only by qualified service personnel.
Do not perform these procedures unless
qualified to do so. Many of the steps covered
in this section may expose the individual to
potentially lethal voltages that could result
in personal injury or death, if normal safety
precautinos are not observed.
5-2. LINE VOLTAGE SELECTION
The Model 8020 may be operated from either 115 V or 230
V nominal 50- 60 Hz power sources. A special transformer
may be installed for 100 V and 200 V ranges. The instru-
ment was shipped from the factory set for an operating
voltage of 230 V. To change the line voltage, proceed as
follows:
WARNING
Disconnect the Model 8020 from the power
cord and all other sources before changing
the line voltage setting.
1 . Using a flat-blade screwdriver, place the line voltage
selection switch in the desired position. The selected volt-
age is marked on the selection switch.
2 . Install a power line fuse consistent with the operating
voltage. See paragraph 5.3.
CAUTION
The correct fuse type must be used to main-
tain proper instrument protection.
5-3. FUSE REPLACEMENT
The Model 8020 has a line fuse to protect the instrument
from excessive current. This fuse may be replaced by
using the procedure described in the following :
WARNING
Disconnect the instrument from the power
line and from other equipment before replac-
ing the fuse.
1 . Place the end of a flat-blade screwdriver into the slot in
the LINE FUSE holder on the rear panel. Push in and rotate
the fuse carrier one quarter turn counterclockwise. Release
the pressure on the holder and its internal spring will push
the fuse and the carrier out of the holder.
2 . Remove the fuse and replace it with the proper type using
Table 5-1 as a guide.
CAUTION
Do not use a fuse with a rating higher than
specified or instrument damage may occur.
If the instrument persistently blows fuses, a
problem may exist within the instrument. If
so, the problem must be rectified before
continuing operation.
5-4. GPIB INTERFACE OPTION FIELD
INSTALLATION (option 1)
The GPIB (general purpose interface bus) option when
installed permit a connection to an A.T.E bus controllable
system. Detailed information on the IEEE488 standard is
SECTION 5
MAINTENANCE AND PERFORMANCE TESTS
POWER LINE VOLTAGE FUSE TYPE
90 - 125V 0.63A, 250V 5x20 mm
195 - 250V 0.315A, 250V, 5x20 mm
Table 5-1. Line Fuse Selection
Model 8020 Maintenance And Performance Tests
Page 5-1