Alpha Omega Instruments 800 Series User Manual

Series 850
The Series 850 TEC Controller is equipped with two (2) 7.5 Ampere 250 Volt AC Line
fuses within the modular AC Input receptacle. If the Instrument does not power up
when the power switch is turned ON, or ceases operation while powered ON, place the
power switch in the OFF position and remove the modular AC Power Cord. Access
the fuse holder by prying the fuse holder open gently with a small screwdriver at each
end. Once the fuse holder is removed, measure the continuity of the fuses with an
ohmmeter. If the fuses are failed (open), be sure to replace them only with fuses of
the same rating (7.5 Ampere 250 Volt, Instrument rating). If the fuses continue to fail
in operation, please contact the factory about returning the unit for service.
The Series 850 TEC Controller is also equipped with up to two (2) fuses mounted at
the rear of each analog controller PCB, providing protection for the TEC load. Since
each Series 850 TEC Controller can be configured for different amounts of load
current, these fuses will be different for each configuration. If power is not being
delivered to the TEC and these fuses are suspected, place the power switch in the
OFF position and remove the modular AC Power Cord. Then remove the instrument
cover, and access these fuses by rotating each fuse covers 180 degrees with a small
straight bladed screwdriver. Please be sure to replace a failed fuse only with a value
consistent with the load rating of the instrument and the TEC you are using. Replace
the instrument cover, and insert the modular AC power cord into the receptacle.
Check your instrument connections, and turn the power ON. If these fuses continue to
fail under load, insure that the replacement fuses you insert are equal to or slightly
greater than the rated load of the instrument, and check the current limit programming
of the instrument controller. If the problem persists, please contact the factory.
External Cleaning of the Series 800/850 Controller
Although cleaning of the controller is rarely required, occasionally the front window
surface of the controller may need wiping. It is important to remember that this
controller should NEVER be cleaned with power on. Always shut power off to the
controller by placing the power ON/OFF switch in the OFF position and then
disconnect the power cord from its IEC standard socket prior to cleaning.
To clean, very sparingly, moisten a clean, soft rag or towel with a commercially
available cleaner such as a window cleaner (without ammonia). You must never spray
any cleaning solutions directly onto these controllers as most cleaning solutions are
electrically conductive and may seep into electrical switches or other electrical
assemblies. With the sparingly moistened towel, gently wipe the surface to be cleaned.
Do not over-moisten any surface-and always have a clean dry rag or towel available to
wipe up or dry any excess cleaning solution.
Following cleaning, reconnect the power cord into its IEC socket on the rear of the
instrument, and restore power to the instrument by placing the power switch in the ON
position.
ALPHA OMEGA INSTRUMENTS CORP. Instruction Manual
Series 800/850 Thermoelectric Cooler Controller Page 16

Alpha Omega Instruments 800 Series Specifications

General

Brand	Alpha Omega Instruments
Model	800 Series
Category	Controller
Language	English