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900 Series Digital Meters w/Pulser (w/Barrier)
Certain 900 Series Digital Meters (model number suffix of CDP) can be powered externally
and are equipped with an integral electronic pulser unit for use with Fuel Management
Systems.
The Fuel Management System must be configured for current sinking or contact closure
types of signals. The meter provides ten counts per unit of measure (in gallon, liter, and
quart units of measure only; pulser does not operate in ounce, pint, or user specific units
of measure).
For installations in explosive atmospheres, the intrinsically safe barrier must be used.
This barrier provides safe electronic connection for all installations, and is mandatory
where the meter is located in an area explosive fumes can accumulate (i.e: minimum 20'
circle around gasoline pumping equipment). Further information on intrinsically safe barrier
installations is located on page 12 and in the detailed wiring information included in the
box with your meter.
Electrical Installation Information
There are multiple electrical configurations for the 900CDP Series Digital Meter, featuring
two different power sources. It is critical that the meter be installed and wired correctly to
ensure correct, safe operation.
WARNING! Electrical wiring should be performed ONLY by a licensed electrician
in compliance with local, state, and national electrical codes (NEC/ANSI/NFPA
70, NFPA30, and NFPA 30A in US installations for example), as appropriate to the
intended use of the meter. The barrier must be properly connected to an earth
ground. Improper installation of this meter and barrier can result in equipment
failure or damage, serious bodily injury, or death!
CAUTION! For meter installations using external power, the power should
come from a dedicated circuit. No other equipment should be powered by this
circuit. Wiring must be of sufficient size to carry the correct current for the meter.
Voltage drop will vary with distance to meter and size of wire; refer to the National
Electrical Code (NEC), or local codes, for Voltage Drop Compensation to be
sure you are using the correct size wire for your application. Wiring between the
barrier and meter MUST NOT exceed 850'. Refer to "Typical Installation" wiring
information document DC000675-010 (included in the meter box) for details.
IMPORTANT! Explosion Proof versus Intrinsically Safe:
There is a distinct difference between a product that is "Explosion Proof" versus
a product that is "Intrinsically Safe". Intrinsically Safe products do not generate
enough heat or energy to cause ignition or explosion. They are safe to use in an
explosive atmosphere (i.e.: around fuel tanks, etc. where explosive vapors may be
present). Explosion Proof products are designed to contain an explosion internally
if one should occur. Understanding the difference between the two is critical
when installing a new item to be certain the installation is safe and to code.
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