2.0 Safety and Preparation for Use
Page 2
The DA-500 was designed for indoor use only and is not intended for operation outdoors
or in a wet environment. The instrument may be mounted in a standard 19-inch
instrumentation rack or may be used on a laboratory bench.
Inspect the instrument and power cords for damage before first use.
2.1 Electrical safety and preparation for use
Voltages capable of causing injury or death are present in this instrument. Use extreme
caution whenever the instrument cover is removed.
Line Voltage
This instrument is designed to operate with a 100 to 240 VAC, 47 to 63 Hz power source.
Optional DC operation with +12 to +36 VDC, 2 Amperes is also possible.
Fuse
A 1.0 Ampere 250V 5X10mm slow-blow fuse is used for 100-240 VAC operation.
A 2.0 Ampere 250V 5X10mm slow-blow fuse is used for the DC power protection.
Only replace fuse with the same type and specifications.
AC Power
The instrument has a detachable three wire power cord for connection to a grounded AC
power source. The enclosure of the unit is directly connected to the outlet ground to
protect against electrical shock. Always use an outlet with a protective ground and do not
disable this safety mechanism. Detaching the AC power cord is the only option of
disconnecting the unit from the AC mains supply. Make sure you have access to the rear
panel or provide an external accessible AC disconnect means for the DA-500.
DC Power
When ordered with the DC power option, the requirements for the external DC power
supply are +12 to +36 VDC at 2 Amperes. The following specifications should be used to
ensure the optimum performance of the DA-500:
DC Supply voltage +12 to +36 VDC, 2 Amps
Line regulation +/- 0.05% for a 10% line change
Load regulation +/- 0.05% for a 50% load change
Output ripple < 5 mV peak-to-peak
