Precision Control Systems 930 - Manual (Page 7)

Model 930 ControlIR TM Instruction Manual Operating Instructions
Research, Inc. Page 3 of 25
Safety
WARNING!
Hazardous voltages are present at the main disconnect switch and load terminals.
Setting the setpoint potentiometer or control signal to minimum does NOT eliminate
these hazardous voltages.
Always remove AC line voltage from the system before making contact with internal
assemblies, line or load wiring, or fuses. Also remove AC line voltage from the system
before making connections, equipment changes, or resistance measurements.
CAUTION!
Up to 480 volts AC is present within the power control solution system.
Do not make any wiring connections when power is applied.
Disconnect power before performing any maintenance or service to the system.
Use extreme caution when adjusting calibration potentiometers on modules when
power is applied.
Always use an isolated oscilloscope for checking waveforms.