NASA Marine BM-1 Compact Bedienungsanleitung

BATTERY

MONITOR BM-1

Compact

NASA

BM-1

Compact

V&A

TIME

100%

TIME TO DISCHARGE, hours

DESIGNED AND

MANUFACTURED

IN ENGLAND

RoHS

2002/95/EC

READ THIS FIRST

INTRODUCTION

INSTALLING THE DISPLAY

SAFETY NOTES - IMPORTANT

INSTALLATION OF THE DISPLAY UNIT

NORMAL OPERATION

SWITCHING THE BACKLIGHT

SHOWING THE TIME TO GO

SHOWING THE VOLTAGE AND CURRENT

SETTING UP

SETTING THE BATTERY CAPACITY

SETTING THE ZERO-CURRENT

BATTERY MANAGEMENT BASICS

QUESTIONS AND ANSWERS

READ THIS FIRST!

Before installing the BM-1 Compact,

CAREFULLY READ THE FOLLOWING INSTRUCTIONS,

ESPECIALLY THE SAFETY NOTES AND WARRANTY CONDITIONS.

INTRODUCTION

The NASA BM-1 Compact is supplied complete with display unit,

current shunt (standard 50mV), and connecting cables. It is

intended for operation on 12V Lead-Acid batteries with capacities

between 5 and 600 Ampere-hours (Ah). Its own current consumption

is less than 1.5mA, which is about 1 Ah per month, less than the self-

discharge rate of most Lead-Acid batteries.

The NASA BM-1 Compact monitors the battery voltage, the current

into and out of the battery, and predicts the time to achieve full charge

(during charging) or the time to full discharge (during discharging).

A visual indication of the state of the battery charge is always available,

and an alarm is used as an alert when the battery voltage falls to a

preset level.

INSTALLING THE DISPLAY

Safety notes - IMPORTANT

Lead-acid batteries can emit hydrogen when in operation. Hydrogen

and air forms a potentially explosive mixture. Accordingly, ensure that

the area around the batteries is well-ventilated, and douse all naked

flames and prevent sparks. Short-circuiting a battery with a metal tool

or piece of jewellery can cause catastrophic currents to flow. Before

installing any of the BM-1 Compact units, remove all jewellery (such

as rings or metal necklaces). Ensure that no metal tool can cause a

short circuit. If you are not sufficiently skilled to undertake any part of

this installation safely, you must seek the assistance of a suitably

qualified person.

INSTALLATION OF THE DISPLAY UNIT

The installation should be performed in the order specified

in the following sections.

Select a convenient position for the display. The area

should be flat and remain dry at all times.

Drill two 2mm holes to accommodate the stainless steel

self-tapping screws supplied. If desired, also drill a 5mm

hole to allow the cable to pass through the panel. Alternatively,

the cable can be folded so as to exit the unit vertically against

the panel face.

Screw the unit to the panel and connect the wires to the

terminal block provided. Connect the shunt cable to the

display unit as shown on Figure 1, above, using the terminal

block supplied. Be careful to connect the wires exactly as

shown, noting that the black and white wires are joined at the

shunt connection, and are connected separately at the

instrument end of the cable.

It is good practice to run the cables vertically downwards from

the unit, even if they later have to rise to connect to the vessel's

supplies. Doing so prevents any water that might get onto the

cables from running back along the cables and into the unit.

Original

Cables

RED RED

RED

BLACK BLACK *

BLACK

WHITE

Cables

supplied

Original

cables

WHITE *

YELLOW YELLOW

YELLOW

BATTERY

SHUNT

FUSE

* Black & White

MUST NOT be

joined at this end.

Cable Supplied

BM-1

Compact

V&A

TIME

Figure 1 - Wiring Installation

TO LOADS

AND CHARGERS

Ensure that all loads and generators are switched off

Disconnect the NEGATIVE terminal from the battery and

connect it to the shunt as shown in Figure 1.

Connect the Black and White wires and Yellow wire

to the shunt as shown on Figure 1.

Connect the short link cable to the shunt and then to the

negative terminal of the battery, as shown on Figure 1.

Ensure it is positioned where it cannot come into electrical

contact with other parts, and ensure it will remain dry and

free from contaminants. Also note that the shunt can get

warm when heavy currents flow, so ensure it is secured in

a position where its heat cannot affect other parts.

TAKE CARE TO AVOID OVER-TIGHTENING THE

CONNECTIONS TO THE SHUNT..

Finally, connect the red wire to the POSITIVE terminal of the

battery to complete the electrical installation. The BM-1 Compact

will now begin assessing the battery state, using its factory

default values. The default values must be set to the values

appropriate to the new installation as discussed in

SETTING UP, below.

Do NOT put the battery on charge immediately.

Apply a load to the battery by switching on lights or instruments

and wait for a few minutes for the BM-1 Compact to “learn”

the battery's characteristics and to show a steady reading

before starting charging.

It is necessary to set the battery capacity to the correct value,

and may be necessary to calibrate the zero current setting,

as described in SETTING UP, below.

10.

11.

12.

13.

NORMAL OPERATION

The BM-1 Compact offers two normal modes of operation:

Time to go.

Volts and Amps;

The battery charge state is always displayed on the scale on the right

of the display. If the battery voltage falls below the preset alarm level

representing dangerous discharge, the alarm bell symbol is flashed.

SWITCHING THE BACKLIGHT

Pressing either key switches the backlight on for approximately

two minutes, after which it switches off to reduce the battery discharge.

SHOWING THE TIME TO GO.

BM-1

Compact

V&A

TIME

100%

TIME TO DISCHARGE, hours

Figure 2 - Percentage & Time to Go

Figure 2 shows the display when the TIME key is pressed.

The remaining battery capacity in digits as a percentage

and analogue “thermometer” displays, and the up-to-date estimate

of how long it will take to charge or discharge the battery fully, are

shown. If the current changes, the estimate of the time updates

continuously, reflecting the best estimate of time to be fully charged

or fully discharged. Times in excess of 199 hours are shown as 199 hr.

SHOWING THE VOLTAGE AND CURRENT

BM-1

Compact

V&A

TIME

100%

DISCHARGE V

Figure 3 - Voltage and Current

Figure 3 shows the display when the V&A key is pressed. The

present battery voltage and battery current, as well as the

estimate of the state of the battery's charge are shown.

The maximum current measurement is 102 Amps.

If the BM-1 Compact is left for long periods registering little or

no charge or discharge current, the estimate of capacity may

become unreliable. It is important to switch some load onto the

battery for a few minutes so a reliable estimate can be calculated,

and its value settles, before starting charging.

SETTING UP

Setting up can be done after applying power to the unit while one

of the keys is pressed. This procedure prevents inadvertent changes

being made by an unfamiliar user. Applying power is usually most

easily achieved by removing the fuse for a few seconds, and then

re-inserting it. When the setting is finished, removing the power

again returns the unit to normal operation when power is re-applied

with no key pressed.

SETTING THE BATTERY CAPACITY

Turn off the unit.

With the V&A key pressed, re-apply the power.

Release the key. CAP is briefly displayed to show that the capacity

is to be changed.

The TIME key increases the setting, and the V&A key reduces it.

Keyboard repeat allows quick changes if the keys are kept pressed.

The maximum capacity is 600 A-hr, and the minimum is 5 A-hr.

When the correct value has been set, turn off the power to the unit

to save the setting.

Turn the power back on for normal operation.

SETTING THE ZERO-CURRENT

If no current is flowing into or out of the battery, and yet a small

residual current is shown on the display, the reading can be

adjusted to zero.

Ensure that no current is flowing into or out of the battery.

Turn off the unit.

With the TIME key pressed, re-apply the power.

Release the key. SET A is briefly displayed to show that the

zero current is to be changed. The TIME key increases the

setting, and the V&A key reduces it

Adjust the setting until the value is shown as zero discharge.

(Note: several presses of the key are needed to change the

setting by 0.1).

When the correct value has been set, turn off the power to

the unit to save the setting.

Turn the power back on for normal operation.

BATTERY MANAGEMENT BASICS

After Voltage and Current, the most useful measurement available

from a battery condition monitor is the state of charge of the battery.

However, estimation of the state of charge of lead-acid batteries is

never exact. The problem of making accurate estimates results from

the characteristics of the cells, the electrolyte, and the history of

currents drawn from (discharge) and supplied to (charge) the battery.

The basis for the best capacity estimates is that the starting condition

is known. The only well-established “known” state of a battery is

when it is fully charged after a long period of trickle or float charging,

usually on a shore or regulated alternator-driven charging system.

Discharging a fully-charged new battery at a current 1/20 of the

manufacturer's stated capacity will discharge it fully in 20 hours. This

current is known as the “20-hour rate”.

So, for example, if a battery has a stated capacity of 100 Ah, then

the 20-hour rate for that battery is 5 Amps (because 100/20 = 5).

Likewise, a 40 Ah battery would have a 20-hour rate of 2 Amps

(because 40/20 = 2).

If higher currents than the 20-hour rate are drawn from the battery,

the available capacity is reduced. For example, if it is steadily

discharged at 10 times the 20-hour rate (50 Amps from a 100Ah

battery), the available capacity falls to about half of the stated

capacity. The battery will be flat after about 1 hour instead of the

expected 2 hours. (However, if the battery is left to recover with the

heavy load removed, most of its remaining capacity will return after

perhaps 20 hours' resting or at a discharge rate close to the 20-hour

rate.) The BM-1 Compact makes due allowance for these effects

when estimating the battery's state of charge and the expected time

to discharge the battery fully.

When the battery is being charged, the voltage is no longer a reliable

estimate of the state of charge, and so the BM-1 Compact integrates

the Ampere hours added to the last known capacity to estimate the

battery's state of charge on a continuous basis. Allowance for charge

efficiency (not all charging current results in useful charge in the

battery) is also computed.

Inhaltsverzeichnis

Andere NASA Marine Monitor Handbücher

NASA Marine

NASA Marine CLIPPER BM-1Li Bedienungsanleitung

Beliebte Monitor Handbücher anderer Marken

Linear Acoustic

Linear Acoustic LQ-1000 Bedienungsanleitung

AOC

AOC I2579V Bedienungsanleitung

Gateway

Gateway FPD1520 Bedienungsanleitung

Furuno

Furuno Mu 120c Bedienungsanleitung

Asus

Asus VB171D - 17" LCD Monitor Bedienungsanleitung

Dell

Dell S2230MX Gebrauchsanweisung

Philips

Philips 107C64 Bedienungsanleitung

Dell

Dell S2409WFP Bedienungsanleitung

EverFocus

EverFocus EN-7517E Bedienungsanleitung

Panasonic

Panasonic TH152UX1 - 152" PLASMA TV Bedienungsanleitung

Dell

Dell Precision 7680 Bedienungsanleitung

LG 50PM1M - - 50" Plasma Panel Bedienungsanleitung

Bosch

Bosch DDU 9 Bedienungsanleitung

Acer

Acer A231HL Bedienungsanleitung

Philips

Philips 86BDL4152T Bedienungsanleitung

NEC

NEC AccuSync LCD5V Bedienungsanleitung

Emay

Emay SleepO2 Bedienungsanleitung

IBM

IBM 6360 Montageanleitung