Blue Sea Systems 8401 DC 5 Position - Manual

Marine Electrical Products
DC Digital Meters
Single-Function Meters
8235 DC Digital Voltmeter
8236 DC Digital Ammeter
8248 DC Digital Multimeter with Alarm
8251 DC Digital Voltmeter with Alarm
Multi-Function Meters
V V
2.88
SET MENU
V V
A A
2.88
1) Physical: The meter should be located in
a visible position with easy access for
operation of the pushbuttons. The display
has adjustable brightness for various lighting
conditions, but for best visibility do not place
the meter in full daylight. The location should
also be dry and protected. The face is splash
proof and its circuit boards are coated for
corrosion resistance, but it is not intended for
use in very wet environments or for
installation outside without additional
protection. Additionally, the wiring should be
located in safe and dry raceways with
appropriate strain relief.
2) Safety: Installation requires the ability to
make high current capacity connections, as
well as connections directly to the battery
positive terminal. These connections must
be made carefully and fused as indicated in
wiring diagram. When working on the battery
be sure to wear safety glasses, turn off all
charging sources, and be careful not to
create sparks which might ignite battery
gases. The scope of this document does not
include instruction in the basic electrical skills
necessary to install the meter. If you do not
have the necessary basic skills you should
employ a qualified electrician.
Installation Overview
Upon power up the meter goes through
a self test sequence which lights all the
function LEDs, then all segments of the
display.
All Models: Startup Sequence
Pressing the button causes the display to
dim. There are three levels of brightness.
Models with a single button also have a
fourth sleep mode in which the display is off
with the exception of a single decimal point.
Models with three buttons have an automatic
sleep mode, which is accessed through the
menu as described in the manual.
V V
2.88
All Models: Using Button for Dimming
The arrow buttons have two functions.
Normally they change the display between
Volts and Amps. When in the MENU mode
they are used to navigate through the
functions or adjust the values.
The center button has three functions.
Normally it is used to dim the display. Holding
the button for 2 seconds will access the
MENU and while in the MENU mode,
pressing it is used to SET or store the
displayed value to memory.
SET MENU
Press to select a
MENU mode or
to SET a value
to memory Hold for 2 seconds
to access the
MENU
Press arrow
buttons to display
Volts or Amps
In MENU use to adjust values.
Three Button Models
The Scan mode will automatically scroll
the display between Volts and Amps
displaying each for about 3 seconds. If the
arrow buttons are pressed the Scan
mode is temporally suspended and the
buttons may be used to manually scroll
through the measured parameters. If no
button is pressed for 10 minutes the Scan
mode is resumed.
To access the Scan mode, hold the
button for two seconds. Use the arrow
buttons to scroll until Sc is in the display.
Press to select the Scan mode. Use the
arrow buttons to select or off.
(Default OFF) Press the button to save the
selection to memory. Two short beeps will let
you know you have successfully set the
function and the meter will revert to the last
displayed function.
A A
V V
SET MENU
Scan Mode - SCA
Specifications
Voltage is an indicator of state-of-charge
only when a battery's open circuit voltage is
measured. Open circuit voltage is obtained
when a battery is neither being charged nor
discharged and the voltage is allowed to be
stabilized. There is disagreement about the
length of time the battery is required to rest
before a usable open circuit voltage is
obtained. However, the user will observe that
in the first 10 to 20 minutes of rest the
voltage will settle to a figure close to its
completely rested open circuit voltage, which
is generally considered to be obtained after
24 hours. Gel batteries can take up to 48
hours. With experience, the user will learn
the time required for reliable readings on any
particular system.
For maximum life a battery should be
discharged no more than 50%. Once a
battery is about 80% of full charge, its
acceptance rate decreases rapidly and it can
take a long time to bring the charge to 100%.
For this reason, the practical operating range
becomes the 50 - 80% of charge area.
A particularly good treatment of battery
management is presented in Nigel Calder's
book, Boatowner's Mechanical and Electrical
Manual (Third Edition, McGraw Hill).
Set the meter to display voltage using
the arrow buttons. The V function LED
will be on. Hold the button for two seconds
to access the MENU. Use the arrow
buttons to scroll until
HI
is in the display.
Press to select the High Voltage Alarm.
Use the arrow buttons to select
or
off
(Default OFF). Press the button to
save the selection to memory and continue.
V V
SET MENU
Flashing
V V
Flashing
SET MENU
H I
High Voltage Alarm - HI
The present setting will appear in the
display (Default 14.80). If the set point is
acceptable, press the button or wait for 15
seconds and the meter will revert to normal
operation. Otherwise use the arrow
buttons to select the desired value. For
example, press and hold the right button to
scroll up to 14.90.
SET MENU
4.80
V V Flashing
Press the button when the desired set
point is displayed and the new value will be
saved to memory. Two short beeps will let
you know you have successfully set the new
value and the meter will revert to normal
operation.
SET MENU
4.90
V V Flashing
V V
SET MENU
Flashing
V V
SET MENU
Flashing
Press to continue, or will appear.
Press arrow until is displayed.
Press button to continue. The present
setting will be displayed. (Default 10.80) Use
arrow to select the LO alarm value, press
to store to memory.
Setting the LO alarm is exactly like setting
the HI alarm. First select the V function
old down the button for 2 seconds to enter
the menu. Use the
to scroll until
lo
appears in the
display.
, then
h
arrow
SET MENU
0.80
V V Flashing
Low Voltage Alarm - LO
If an alarm occurs, the audible alarm will
sound and the display will alternate between
the type of alarm and the measured value.
Silence by pressing button. Display
will alternate between the alarm condition and
the value. Every 5 minutes the alarm will give
four beeps and display the alarmed
parameter. This will continue until the alarm
condition is cleared, or the alarm function is
turned off, or the set point changed.
If in Sleep an alarm will “wake up” the
meter and it will function as above. After 10
minutes of no acknowledgement it will re-
enter the Sleep mode. Every 5 minutes it will
give four audible beeps and display the
alarmed condition and measured value for 30
seconds before returning to Sleep mode.
the
Display Alternates
SET MENU
LO
A A
W
SET MENU
A A
0.00
Acknowledging an Alarm
The Sleep mode is a simple power-
saving feature. If there are no button
presses for 10 minutes the display goes to
sleep and only a single decimal point is lit.
Pressing any button causes the meter to exit
the sleep mode and revert to the last
displayed function.
se the
arrow buttons to select or off.
(Default OFF) Press the button to save the
selection to memory. Two short beeps will let
you know you have successfully set the
function and the meter will revert to the last
displayed function.
To access the Sleep mode, hold the
button for two seconds. Use the arrow
buttons to scroll until Slp is in the display.
Press to select the Sleep mode. U
SET MENU
S L P
Sleep Mode - SLP
A A
V V
The 8200 Series meters incorporate
microprocessor control and advanced
electronics specifically designed for power
monitoring to provide accurate metering with
a variety of adjustable user features. DC
meters have the provision for separate power
and voltage sensing. Using separate voltage
sensing is recommended to minimize the
voltage drop caused by the current
consumption of the meter itself. This is
particularly necessary if the meter is located
more than a few feet from the battery or
source being measured.
Models that have the ability to measure
DC current come with a precision shunt. The
shunt must be installed in the negative line to
avoid damage to the meter. The shunt is a
precise resistance that is temperature stable.
It has a full current rating of 500 Amps and
when 500 Amps flows it generates a voltage
of 50 mV (0.050 V). Thus, 10 Amps
generates 1.0 mV, 1 Amp generates 0.1 mV,
and 0.1 Amp generates only 0.01 mV. This is
a very small signal and you must be sure that
all connections are secure and well made. It
is also necessary to use twisted pair wire to
minimize susceptibility to electrical system
noise.
Theory of Operation
A full discussion of the subject of battery
management is beyond the scope of these
instructions. However, the following will alert
meter users to some of the issues requiring
further study.
Battery management is the key to a
healthy electrical system. There are several
ways to measure the state of charge in a
battery or battery bank. The three most
common methods are:
1. Open Circuit Voltage
2. Electrolyte Specific Gravity
3. Net Amp-Hours
Voltage is an effective method of
determining charge condition when properly
used with an understanding of the battery
charge and discharge process. The table
below shows the state of charge for different
type batteries. Please note the difference
between a full and a discharged battery is
about 1 volt.
State of
Charge
Wet
Cell
AGM
100%
75%
50%
25%
0%
12.7-12.6
12.40
12.20
12.00
11.80
12.95-12.85
12.65
12.35
12.00
11.80
Open Circuit Voltage vs. State-of-Charge
Use
12 Volt Battery Open Circuit Voltage
Gel
Cell
12.90-12.80
12.60
12.30
12.00
11.80
Note: Divide values in half for 6-volt batteries.
CAUTION
The shunt must be installed in the negative
line to avoid damage to the meter. Positive
voltage applied to terminals #4 and #5 will
cause damage not covered by warranty.
Models that have the ability to measure
DC current are supplied with a precision
shunt. The shunt must be installed in the
negative line of the circuit whose current you
wish to measure. For marine and RV
applications this will normally be in the
negative line of the battery that supplies the
domestic systems. The current must flow
through the shunt to be measured. For
example, if you connect the negative return
wire of a load or source directly to the battery
its current will not be measured.
To attain the most accurate reading the
shunt must be located adjacent to the battery,
avoiding long battery cables. Break the circuit
at this point and install the shunt by
connecting the ends of the wire under each of
the two large bolts at the top of the shunt. It
makes no difference which wire is attached to
which bolt. The small screws are for the
meter sense leads and should have no
current-carrying connections made to them
as this will affect measurement accuracy.
Use this simple example: Disconnect
everything from the battery negative and
connect it to one side of the shunt; this is now
referred to as the Load side of the shunt.
Run a single cable capable of carrying the
maximum combined current of all loads
between the other side of the shunt and the
battery negative; we will call this the Battery
side of the shunt. This cable must be as big,
or bigger than the largest cable connected to
the Load side of the shunt.
Installing Shunt
General:
Display Character Size
9/16"
Power Supply Voltage 8-50V DC
Maximum Power Consumption 1.00W*
Minimum Power Consumption 0.60W*
(Sleep mode PN 8248 and PN 8251 Only)
Voltage Measurement:
Range
0-60V DC
Resolution 0.01V DC
Accuracy (% of Reading) ± 0.5%**
Current Measurement:
Shunt
500A-50mV
Range ± 500A DC
Resolution (-100 to -500)
1A DC
Resolution (-99.9 to +500) 0.1A DC
Accuracy (% of Reading)
± 0.5%**
Physical:
Splashproof front
Dimensions
Height 2.431" (61.75mm)
Width 2.896" (73.56mm)
Depth 3.400" (86.36mm)
* Variable with voltage, display intensity,
segments illuminated, and sleep mode
**± 1 least digit of resolution
Caution:
Positive voltage applied to terminals #4 and
#5 will cause damage not covered by
warranty.
Displaying the Code Revision
For customer service convenience, all models
are able to display the revision of software
installed in the meter. To see the software
revision for meters with a single button, press
and hold the center ( ) button. To see the
revision on meters with three buttons, press
and hold the two
buttons. In either
case, the power-up test will be performed and
the software revision will be displayed.
arrow
A A
V V
8 . 8 . 8 . 8 .
Voltmeter Panel
8051 DC Digital Voltmeter Panel