Resumen
The 38898 consists of a Morningstar 15 A charge regulator that has been re-configured by Campbell Scientific and includes the mounting hardware to mount it to a 2.54 cm (1 in.) grid back panel. This charge controller is well suited for large power supplies, which includes an AGM battery (BP84 84 Ah 12 V Sealed Rechargeable Battery) and a large solar panel (SP370-L 370 W Solar Panel). As an additional benefit, Campbell Scientific provides full support of the SunSaver MPPT.
Leer másVentajas y características
- Preconfigured to work with AGM battery types and to prioritize data collection over long-term battery health
- 12 V or 24 V battery charging
- 60 Vdc maximum input compared with the 50 Vdc on the CH201 and 40 Vdc on the CH150
- Selectable battery type: gel, sealed, AGM, flooded
- Programmable low voltage disconnect (LVD)
- Auto-equalization feature for AGM battery types
- Terminals for remote temperature sensor (RTS) to compensate charging based on battery temperature; use pn 38899
- Built-in temperature sensor for use when no RTS is provided
- Battery status LEDs to provide battery state of charge and indicate fault condition
- RS-232 communication with pn 34540
Imágenes
Descripción detallada
The 38898 uses maximum power point tracking. While the 38898 is capable of RS-232, Modbus, and USB communications, only RS-232 communication is supported through the hardware. Note: When reading parameters off the 38898 using a data logger, you must use the CPI/RS-232 port. This functionality does not work when using the control ports.
The 38898 offers the ability to select the battery type: gel, sealed, AGM, or flooded. To set the battery type, use a jumper and switch #1.
The 38898 offers programmable low voltage disconnect (LVD). From the manufacturer, the 38898 comes with an 11 V LVD when switch #2 is on and an 11.5 V LVD when switch #2 is off. At Campbell Scientific, we prioritize data over battery health and reconfigure the LVD to 8.5 V and the LVR to 10.0 V. Caution: Draining a battery below 11.5 V will shorten the life of the battery.
Preguntas frecuentes
Número de FAQs relacionadas con 38898: 5
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The PS100, PS150, and PS200 models take in AC or DC power from a wall transformer or a solar panel. The internal regulator controls the charge to the battery to make sure the battery doesn’t become overcharged (based on temperature).
If the switch is on, the voltage from the battery will flow back out from the regulated battery to the loads; however, the voltage on that battery may be 11.9 V, 13.2 V, or some other value that the battery happens to be at. It is important to understand that the voltage will not always be exactly 12.0 Vdc. Rather, the voltage will float up or down as the battery is recharged or depleted.
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The voltage from a solar panel will fluctuate throughout the day.
If AC power is being used, the voltage is usually stable.
The voltages coming into the regulator inputs are controlled so that the battery won’t be overcharged (and thus ruined by boiling out the electrolyte). If the battery connected to the regulator is good, the highest voltage you will likely see is just above 14 Vdc in the extreme cold, but normally it should be around 13.2 Vdc.
If you have a nearly dead battery (to be checked with a voltmeter) or a battery with shorted cells, you will see a very low battery voltage. The lowest voltage you will see on the data logger data is usually about 10.0 V because the data logger will shut down near that level and then wait for the voltage to increase to an 11- or 12-volt level.
The ripple voltage is a few millivolts flowing into the battery, but the battery should filter out most of that noise, providing a pretty stable voltage.
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Yes. The G and 12V terminals on the charge regulator are used to connect the black and red wires that connect with the green connector, which provides power to the data logger.
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Look for a stamp on top of the battery. The stamp should be in a date format of YYMMDDXX where:
- YY is the year.
- MM is the month.
- DD is the day.
- XX is the manufacturing plant.
This indicates the age of the battery.
To evaluate the condition of the battery:
- Charge the battery.
- Let the battery sit for a couple of hours.
- Measure the open circuit voltage to get an estimated indication of condition.
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The CH150 or PS150 will pull power only from the source with the highest voltage at that moment. For example, the regulator will take the 20 W input from the 24 Vdc wall transformer rather than from the 18 V 50 W solar panel—even during the day. If the power goes out, the 50 W solar panel will charge during the day with no charging at night.
Compatibilidad
Nota: lo siguiente muestra información de compatibilidad notable. No es una lista de todos los productos compatibles.
Dataloggers
| Producto | Compatible | Nota |
|---|---|---|
| CR1000 (retired) | The CR1000 is not compatible in terms of communication. | |
| CR1000X (retired) | The CR1000X is compatible in terms of communication. | |
| CR300 (retired) | The CR300 is compatible in terms of communication. | |
| CR310 | The CR310 is compatible in terms of communication. | |
| CR350 | The CR350 is compatible in terms of communication. | |
| CR6 | The CR6 is compatible in terms of communication. |
Información de compatibilidad adicional
The 38898 can be used to power any 12 V device. Refer to the Compatibility information on the web page regarding communication compatibility with data loggers.
Especificaciones
| Operational Temperature | -40° to +60°C |
| Storage Temperature | -55° to +100°C |
| Battery Voltage Range | 7 to 36 V (power out) |
| Maximum Input Voltage | 60 V |
| Quiescent Current | 35 mA |
| Certifications |
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| Dimensions |
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| Weight | 589.67 g (1.3 lb) |