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Summary of Contents for Clipper BM1
- Page 1 DESIGNED AND MANUFACTURED IN ENGLAND 100% DISCHARGE ©!LOffeJffeJ{g� BATTERY MONITORS BM1/BM2...
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Page 2: Table Of Contents
READ THIS FIRST! BEFORE INSTALLING THE BM1 BM2, CAREFULLY READ THE FOLLOWING INSTRUCTIONS, ESPECIALLY THE SAFET Y NOTES AND WARRANT Y CONDITIONS. IMPORTANT BM2 look identical but they are different Models. Tha Shunts and Shunt cables are interchangeable. CLIPPER BMt.. -
Page 3: Int Roduction
Ahr per month, less than the self-discharge rate of most Lead-Acid batteries. The NASA BM1/BM2 monitors the battery voltage, the current into and out of the battery, the total since it was last fully charged, and predicts the time to achieve full charge (during charging) or the time to full discharge (during discharging). - Page 4 POSITIVE NEGATIVE TO ALL DOMESTIC TO ALL DOMESTIC & LOADS GENERATORS LOADS AND GENERATORS -- • Black & White MUST NOT be Joined end. .t lhl8 Figure - Domestic battery only Connect the shunt cable to the display unit as shown on Figure 1, below, using the terminal block supplied.
- Page 5 Do NOT put the batteiy on charge immediately. Apply a load to the batteiy by switching on lights or instruments and wait for a few minutes for the BM1/BM2 to "learn" the battery's characteristics and to show a steady reading before starting charging.
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Page 6: Battery Management Basics
20 hours' resting or at a discharge rate close to the 20-hour rate.) The BM1/BM2 makes due allowance for these effects when estimating the battery's state of charge and the expected time to discharge the battery fully. -
Page 7: Normal Operation
(and other effects) reduce the available charge after fully charging the battery. If the effects are ignored, the BM1/BM2 will incorrectly estimate that more capacity is available at any state of discharge than is actually the case. If so, it is wise to alter the nominal capacity stored in the unit to match the reality of the battery's condition. -
Page 8: Switching The Backlight
The three normal modes, and the keys which activate them, are shown in Figure below. Ampere-hours Charge/discharge times Volts and Amps Figure - Operating modes Switching the backlight ILLUM Press the key to switch the backlighting on or off. The backlight area is restricted in the top comers of the display to concentrate the lighting in the areas of interest. -
Page 9: Engineering
If the BM-1 + 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. -
Page 10: Questions And Answers
Check the wiring is correct and securely terminated. Check the fuse, and check that the battery is not completely flat. Why does my BM1/Bl!II 2 show that the number of hours remaining ia high or low when a constant discharge current is flowing?. - Page 11 Do I need to disconnect my BM1/BM2 when I leave the boat for long periods? No. The BM1/BM2 is designed to be permanently connected to the battery. It is independently fused, and draws only 1.SmA from the battery. At such a low...
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