Voltage can again be useful for seeing that the batteries are in a state of near discharge-this is useful since it is not good for lead-acid batteries to be left discharged for too long. Then when discharging the batteries, the "BATTERY % FULL" (or "amp-hours from full") reading is more accurate for determining intermediate battery state of charge. The TriMetric, therefore, uses the battery voltage as an indicator for when the batteries are "charged". For example, if they are charged at a high rate for awhile, the voltage will rise higher than they would be after charging stops, due to what are called "polarization" effects. However while discharging a 12 volt lead acid battery a voltage of 10.8 to 11.6 volts will show a low charge (depending on how many "amps" are being withdrawn.) Volts is not too informative when the batteries are between 20%-90% charged, since in this case exact voltage depends on several factors, including: whether the batteries are being charged or discharged, how fast they are being charged or discharged, temperature of the battery, and the recent past history of charge/discharge. A well charged battery while charging a 12 volt lead-acid battery will indicate voltage above 14.3 volts. If you have "lead acid" batteries-the most commonly used type- the "Volts" readout gives useful information only about the "extreme" cases, when your batteries are mostly charged, or mostly discharged. Using the "BATTERY % FULL" display, (or "Amp-hours from full") readout you will be able to see approximately how much energy you've withdrawn from the battery bank. After a while you will become instinctively familiar with the electrical usage of your appliances, so you won't need to refer to the meter. This is inconvenient if the meter is located away from the living area. (It is designed to be located up to a few hundred feet away from the battery bank using 4 or 5 wires.) One important use is to learn how much electrical power various appliances draw by looking at the "amps" or watts readout first with the appliance off, and then observing how much the current increases when you turn it on. It displays the current draw or the charging current by either amps and watts. Choosing meter location and some benefits of battery monitoring: To make best use of this monitor, we recommend that it be located where it can be readily observed in the living area where the electrical power is used, such as a kitchen or living room. BOGART ENGINEERING Inc Two Bar Road Boulder Creek, CA (831)ΔΆ A: What you need to know before installing the TriMetric meter. Contact your dealer or us before shipping. Any meter not meeting the specification or performance description will be replaced or repaired within four years of purchase, provided it has not been subject to abuse or misapplication, and provided the defective unit is shipped to us if we request it. Meter is warranted for 4 years against any manufacturing defects. Information on the three other (optional) program setpoints. Entering required two setpoints in TriMetric memory: How to enter necessary data related to your battery system to ensure the TriMetric displays show correct information on battery % full. Program the two most important parameters into meter (section C1). Follow step by step installation instructions in section B. Consult drawings Figure 1 and 2 (pages 7-8). Please read or scan two pages of introductory information in section A. If you do not have this knowledge please have someone install it who does, or at least get some competent help to supervise the installation. 1 INSTALLER S INSTRUCTIONS FOR TRI-METRIC Battery system monitor, Models TM-2030-RV and TM-2030-A revised March 2014 IMPORTANT: The wiring installation for this meter, especially the shunt installation must be performed by someone knowledgeable in proper wiring, electrical practices, and safety.
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