Q:  Why would I select the HL-200 instead of a standard HyperLogger™? A:  Three applications are clear: First. many applications of our loggers are in sites that do not have power readily available. For example in a remote mountain site installation... or even within a electric utility production facility - power may be all around but no 120VAC outlets exist! The HL-200 can then use the RPS-1 to power the sensors (e.g. 4-20mA loops, 5Vdc, etc) during readings. Secondly... the RPS-1 is a good clean power supply that is tightly integrated into our gear. This can save the Customer costs associated with locating a power supply to use for loop excitation as well as the required packaging hassles. Thirdly... in long term remote site applications, the HL-200 can use photovoltaic arrays to continually charge the RPS-1 gel-cells during daylight hours, allowing the HyperLogger™ to log indefinitely. Q:  Can the HL-200 cycle power to the sensors to maximize battery life? A:  Yes... that's exactly what it was designed to do. The sensor excitation 'Warm-Up' icon within the HyperWare programming software can be used to turn the RPS-1 power onto the sensor just before the HyperLogger™ takes a sample, then cycles the power off. Q:  What is the energy capacity of the RPS-1? A:  The RPS-1 utilizes two 12V, 2.2AH capacity gel-cell batteries. If the User selects an output voltage that is 3.5, 5, or 10V, the two batteries are used in a parallel mode resulting in approximately 4AH of capacity. If a higher output voltage is selected (12, 15, 18, 22V) the batteries are connected in series (to meet the higher voltage requirements) resulting in approximately 2AH of capacity. Note that many 4-20mA transmitters can actually run at voltages considerably less than the typical 24Vdc specified. If the transmitter can run at 10 Vdc, then the batteries can be configured in parallel providing twice the capacity. A call to the transmitter manufacture can confirm this...

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