KEPCO MST Series - Manual (Page 19)

MST SERIES 061813
2-1
SECTION 2 - INSTALLATION
2.1 UNPACKING AND INSPECTION
This instrument has been thoroughly inspected and tested prior to packing and is ready for
operation. After careful unpacking, inspect for shipping damage before attempting to operate.
Perform the preliminary operational check as outlined in PAR. 2.5. If any indication of damage is
found, file an immediate claim with the responsible transport service.
NOTE
If the Power Modules are shipped pre-installed in the RA 55 Rack Adapter, each
module is secured to the RA 55 Rack Adapter by two shipping screws. These
screws must be removed from the bottom of the rack adapter, otherwise the mod-
ules cannot be removed from the rack adapter.
2.2 TERMINATIONS AND CONTROLS
a. Internal Calibration Controls: Refer to Figure 2-4 and Table 2-1.
b. Front Panel: Refer to Figure 2-1 and Table 2-2.
c. Rear Panel: Refer to Figure 2-1 and Table 2-3.
2.3 A-C INPUT REQUIREMENT
MST Power Modules operate from single-phase a-c mains power over the specified voltage and
frequency ranges without adjustment or modification.
2.4 COOLING
The power transistors and rectifiers in the MST Power Module are maintained within their oper-
ating temperature range by means of internal heat sink assemblies cooled by internal fans.
PANEL OPENINGS AND THE TOP OF THE CASE MUST BE KEPT CLEAR FROM
OBSTRUCTIONS TO INSURE PROPER AIR CIRCULATION. Maximum ambient temperature
for installed MST modules is 45°C. See technical manuals for RA 55 or CA 400 rack adapters
TABLE 2-1. FUNCTIONS OF INTERNAL CONTROLS
REFERENCE
DESIGNATION
CONTROL PURPOSE
R49 +5 V REF This is a primary adjustment for the analog circuits.
R11 EO Zero
This control is used to adjust the output voltage of the Power Module to
zero. EO Zero calibrates the Power Module in the Voltage mode.
R51 IO Zero
This control is used to adjust the output current of the Power Module to
zero. IO Zero calibrates the Power Module in the Current mode.
R50 Current Sensing Zero This adjustment calibrates the current monitor amplifier to zero.
R52 Full Scale Current Adjust This adjustment calibrates the programmed full scale value.
R47 VREF This is a full scale voltage adjustment.
R48 IREF This is a current read back accuracy adjustment.