Keithley 2520, Руководство пользователя, Страница: 38 / 329

1-12 Getting Started Model 2520 User’s Manual
The communication interface status is briefly displayed. If the IEEE-488 bus is the pres-
ently selected interface, the identification message will include the primary address. For
example, if the primary address is 25 (factory default), the “IEEE Addr=25” message is
displayed. If the RS-232 interface is selected, the “RS-232” message is displayed.
After the power-up sequence, the instrument goes to its normal display state with the out-
put off (blue ON/OFF OUTPUT indicator and testhead POWER lights off).
System identification
To obtain the serial number and revision information, use the MENU/SERIAL # selection
or the *IDN? query via remote.
Fuse replacement
A rear panel fuse protects the power line input of the Model 2520. If the line fuse needs to
be replaced, perform the steps below:
WARNING Disconnect the line cord and all cables and test leads from the instru-
ment before changing the line fuse.
1. The fuse is located in a holder in the power module adjacent to the AC receptacle
(
Figure 1-2 .) At the right of the fuse holder is a small tab. At this location, use a
small bladed screwdriver to release the fuse holder.
2. Slide the fuse holder out to gain access to the fuse carrier and fuse.
3. Remove the carrier with blown fuse, and replace the fuse with the correct type
listed in
Table 1-1 .
CAUTION For continued protection against fire or instrument damage, replace
the fuse only with the type and rating listed. If the instrument repeat-
edly blows fuses, locate and correct the cause of the problem before
replacing the fuse.
4. Install the fuse carrier in the fuse holder, then insert the fuse holder in the power
module.
Table 1-1
Line fuse
Line voltage Fuse rating Keithley part no.
100-240V 1.6A slow blow, 250V, 5 X 20mm FU-106-1.6