Section 7. Installation
FIGURE 29: Connecting to Vehicle Power Supply
7.2.4 Uninterruptable Power Supply (UPS)
A UPS (un-interruptible power supply) is often the best power source for long-
term installations. An external UPS consists of a primary-power source, a
charging regulator external to the CR800, and an external battery. The primary
power source, which is often a transformer, power converter, or solar panel,
connects to the charging regulator, as does a nominal 12 Vdc sealed rechargeable
battery. A third connection connects the charging regulator to the 12V and G
terminals of the POWER IN connector..
7.2.5 External Power Supply Installation
When connecting external power to the CR800, remove the green POWER IN
connector from the CR800 face. Insert the positive 12 Vdc lead into the green
connector, then insert the negative lead. Re-seat the green connector into the
CR800. The CR800 is internally protected against reversed external-power
polarity. Should this occur, correct the wire connections and the CR800 will
resume operation.
7.2.6 External Alkaline Power Supply
If external alkaline power is used, the alkaline battery pack is connected directly
to the POWER IN 12V and G terminals. Voltage input range is 9.6 to 16 Vdc.
7.3 Grounding — Details
Grounding the CR800 with its peripheral devices and sensors is critical in all
applications. Proper grounding will ensure maximum ESD (electrostatic
discharge) protection and measurement accuracy.
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