AMETEK SFA Series Ethernet Programming - Manual (Page 135)

M550129-03 Rev K 7-1
SECTION 7
CALIBRATION
CAUTION
Please refer to the power supply operation manual for further information before
performing calibration procedures. Only qualified personnel who deal with
attendant hazards in power supplies, are allowed to perform calibration
procedures. If calibration is not performed properly, functional problems could
arise, requiring that the supply be returned to the factory.
7.1 INTRODUCTION
The Digital Interface Adapter (DIA) for IEEE 488.2 (GPIB), for RS232, or for
Ethernet, is calibrated to adjust internal signal levels to correspond to the
expected supply output signal levels. You must perform the calibration
procedures if the power supply’s programming or readback performance falls
out of specification due to component aging drifts. Refer to your power
supply operation manual to find the required calibration interval. The DIA is
calibrated for output voltage programming, output current programming,
output overvoltage protection programming, voltage readback, and current
readback.
The calibration procedures in the following sections are designed to be
performed at ambient temperature of 25
°
C + 5
°
C, after the unit has had a
stable output and a stable load for at least 30 minutes.
The following test equipment is required in addition to the computer system to
complete the following calibration:
•
Model HP 344401A or equivalent 6-digit digital voltmeter (DVM)
•
Current shunt rated for an accuracy of 0.25% or better and a minimum
of 125% of the UUT full scale output current
NOTE: The calibration procedures in the following sections are applicable
either to Ethernet only or to Ethernet and GPIB as noted in each section
heading. All calibration procedures steps should be performed. Omitting any
step or applicable section may affect the specified performance of the unit.
The CAL:DATE (for GPIB) command or the CAL:MOD:LASTCALDATE and
CAL:MOD:NEXTCALDATE (for Ethernet) commands (Section 6.12) should