Model 2500 and 2502 User’s Manual Getting Started 1-13
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.
Display
Display format
The Model 2500 display is used primarily to display measured readings and voltage bias
source values. The top line displays measurement function readings, and the bottom line
shows voltage bias values. Channel 1 measurement function readings (MSR1) are dis-
played on the left, while channel 2 measurement function values (MSR2) appear on the
right. (You can select channel 1, channel 2, or dual-channel display with the CHANNEL
SELECT and DISPLAY TOGGLE keys; see “CHANNEL SELECT key” and “DISPLAY
TOGGLE key” below.)
Measurement reading information can be displayed using either engineering units or sci-
entific notation in either fixed- or floating-point format. Use the GENERAL/NUMBERS
selection of the main MENU to select the display format, as discussed under “Menus”
later in this section.
Engineering units example: 1.234567µA
Scientific notation example: 1.234567e -6A
Annunciators, which are located along the top of the reading/message display, indicate
various states of operation as covered previously in “Front panel summary.”
Table 1-1
Line fuses
Line voltage Fuse rating Keithley part no.
100V, 120V
220V, 240V
0.630A slow blow, 250V, 5 × 20mm
0.315A slow blow, 250V, 5 × 20mm
FU-106-.630
FU-106-.315
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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