Owner manual

Marine Electrical Prod ucts
Analog DC Ammeters
with External Shunt
0-50A, 0-75A, 0-100A,
0-150A, 0-200A
Meter Specifi cations
Voltage: DC
Amperage Draw: 1 Milliamp at full scale
Display: Analog scale
Accuracy: 3% of scale range
Size Inches Millimeters
Face Width: Micro Meter 2 50.80
Standard Meter 2-5/8 66.50
Mounting Hole: Micro Meter 1-1/2 38.10
Standard Meter 1-7/8 47.60
Calibration
The Ammeters are calibrated at the factory.
Guarantee
Any Blue Sea Systems product with which a customer is not satisfi ed may be
returned for a refund or replacement at any time.
Blue Sea Systems Inc. Phone [phone]
425 Sequoia Drive Fax [phone]
Bellingham, WA 98226 USA E-mail [e-mail]
www.bluesea.com
Document 9322 Rev.H
Warning
It is not possible within the scope of these instructions to fully acquaint
the installer with all the knowledge of electrical systems that may be
necessary to correctly install this product. If the installer is not
knowledgeable in electrical systems we recommend that an electrical
professional be retained to make the installation.
1. Disconnect all AC and DC power
Before starting, disconnect the main positive cable from all batteries to
eliminate the possibility of a short circuit while installing the meter or
shunt. Also disconnect the AC shore power cord from the boat to
eliminate the possibility of electrocution from AC wiring in the proximity
of the DC circuits.
2. Select mounting location and cut opening
Select a location for the meter display which is protected from water on
the meter front and back and is not in an area where fl ammable vapors
from propane, gas or lead acid batteries accumulate. The meters used
in marine electrical panels are not ignition protected and may ignite
such vapors.
Choose a convenient point in the circuit to be measured to locate the
shunt. It should be located where it and the associated wiring will be
protected from physical damage and it is protected from accidental
contact with grounded metal. The shunt may be located at any point in
the circuit, but mounting it closer to the meter location will keep the
sense wires short, minimizing voltage loss and interference, creating
the most accurate meter reading. Where a long run may be required,
Interference can be minimized by using twisted pairs of conductors.
There are two mounting methods for the Ammeters
2.1. Surface Mount: Drill fi ve clearance holes a shown below. The
size of the meter will determine the size and location of the clearance
holes. Use the nuts and washers supplied in the accessory package to
secure the four mounting studs to the mounting surface. This method
will work on mounting surfaces up to 5/8” thick.
Installation
2.2. Panel Mount: For thicker mounting surfaces, the meter can be
mounted into a 0.125” thick panel. Blue Sea Systems offers meter
mounting panels for our standard size meters only. Use part number
8013 to mount a single meter or part number 8014 to mount two
meters.
1. Calculate the maximum sustained amperage of the circuit. Measure
the length of the circuit from the power source to the load and back.
2. Does the circuit run in an engine space or non engine space.
3. Calculate Famps (Feet x amps). Multiply circuit length by max. current.
4. Base the wire on either the 3% or 10% voltage drop. In general, items
which affect the safe operation of the boat and its passengers (running
lights, bilge blowers, electronics) use 3%; all other loads use 10%.
5. Starting in the column which has the right voltage and voltage drop,
run down the list until arriving at a value which is greater than the
calculated Famps. Move left to the Ampacity column to verify that the
total amperage of the circuit does not exceed the maximum allowable
amperage of the wire size for that row. If it does, move down until the
wire ampacity exceeds the circuit amperage. Finally, move left to the
wire size column to select the wire size.
Example
a. A 12 volt system at 10% drop with a 40’ circuit x 45 amps = 1800
Famps. A wire size of 8 is required.
Wire Sizing Chart
Standard Meter
Micro Meter