Internal Power (Battery Power)
All 900DP Series Digital Meters are battery powered. The battery tray is located behind the
faceplate (see illustration page 8). Power is supplied by two alkaline “AA” batteries. With
normal use, these batteries should provide 2 – 4 years of service. The digital display has
an integral warning of low battery level (see page 6 for details).
WARNING!
To reduce the risk of explosion
DO NOT
mix old batteries with new
batteries, or mix batteries of different manufacturers.
WARNING!
Batteries may
ONLY
be replaced with the following:
Duracell MN1500 Duracell MX1500 Energizer E91
Incorrect battery selection presents a safety hazard.
External Power
900DP Series Digital Meters can use an external power source to operate.
Regardless of
the source (AC or DC), external power MUST be routed through the Intrinsically Safe
Barrier any time the meter is installed in an explosive atmosphere. External power
sources MUST be within the rated parameters of the intrinsically Safe Barrier and
meter.
External AC Power
External AC power
CANNOT
be applied directly to the 900DP meter.
It must be routed
through the Intrinsically Safe Barrier regardless of meter installation location. The
900DP Meter is not designed for direct AC power input. See Intrinsically Safe barrier
wiring information on page 12 for additional information.
External DC Power
The 900DP meter can be powered directly by an external DC power source (such as a
Fuel Managment System) that operates within the meters parameters. The Intrinsically
Safe Barrier MUST be used anytime the meter is installed in an explosive atmosphere. For
additional information on non-barrier installations, see page 13.
900CDP Battery and Wiring Access
Intrinsically Safe Barrier
11
