Introduction; Calibration Setup; Service Environment And Precautions; Equipment Required - Xantrex XFR 7.5-140 Operating Manual

Section 5. Calibration

Introduction

WARNING
HIGH ENERGY AND HIGH VOLTAGE WARNING
Exercise caution when using and calibrating a power supply. High energy levels
can be stored at the output voltage terminals on a power supply in normal
operation. In addition, potentially lethal voltages exist in the power circuit and on
the output and sense connectors of a power supply with a rated output greater
than 40 V. Filter capacitors store potentially dangerous energy for some time
after power is removed.
Adjustments to programming and readback accuracy for the power supply are made
using cover-off procedures which must be performed by a service technician.

Calibration Setup

•
Service
Follow established antistatic procedures.
Environment
•
Work at a bench with adequate room and support for the test unit and for all
and

equipment required.

Precautions
•
To reduce shock hazard, use only an insulated, straight-bladed screwdriver when
calibrating trim potentiometers.
•
NEVER calibrate these units alone. Ensure that someone is present who can help
should an accident occur.
Equipment You will need the following equipment when calibrating your power supply.
Required
•
5 1/2-digit true RMS voltmeters (DVMs) (±0.05% accuracy) with test leads
•
Current shunt 1 mV/AMP (±0.25%) and connecting wire. The recommended
current ratings for the DC shunt and connecting wire must be at least 10%
greater than the power supply's output current rating. See also Table 2.4,
"Current Carrying Capacity for Load Wiring".
•
Non-conducting, straight-bladed screwdriver
Release 3.1
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