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DC Power Operation
Instruments with the 631-X option board modification can be used with any +12 VDC source for
continuous operation, if the AZI Power Inverter Kit, P/N Y031 0902 is installed along with the
option board. To preserve the life of the DC power source, usually a car or truck battery, the
power inverter will switch on automatically to supply the AC necessary for regeneration only.
The external switch on the inverter should always be OFF to preserve battery life during normal
sampling.
To work with the power inverter kit, place option board SW100 DIP Switch #6 to the ON position.
When the instrument starts a regeneration with option board SW100 DIP Switch #6 ON, the
instrument sends a signal to close the relay on the DC Power Adaptor, AZI P/N 1000 0089,
mounted between the data logger and the instrument. This switches the power inverter ON using
the inverter’s internal switch.
NOTE: When this mode is enabled, the instrument does NOT check for 115 VAC for the
regeneration. If there is no AC power to the instrument, and a regeneration is initiated, the
instrument will flash .H.H.H (rather than .P.P.P), however the sensor will not heat, nor will the
sensor be cleaned.
DC Power Adaptor Kit, AZI P/N Y031 0902
• The DC power adaptor kit consists of:
DC Power Adaptor, P/N 1000 0089
DC Power Inverter, P/N 4000 1021
DC Power Cable Assembly, P/N 6000 1093
Installation
• Ensure that the instrument’s option board switches are set correctly for the intended
operation with the option board’s SW100 DIP Switch #6 set to “ON” for DC operation.
• Mount the interface board to the rear of the instrument. Tighten the mounting screws.
• Place or mount the DC/AC power inverter in a secure position near the instrument.
• Connect the cable from the DC/AC power inverter to the matching connecter on the
interface board. Note that the connectors are keyed to prevent improper connection.
• Plug the instrument’s AC power cord into the power inverter and connect it to the
instrument.
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