Q: Can the HLP-10 log other sensor / signal inputs in addition to power?	A:  Yes, The HLP-10 was designed to meet the needs of applications requiring power AND other sensor/signal data acquisition requirements. With the installation of optional Interface Modules, the HLP-10 can accept up to 20 additional analog / digital signals from pressure, flow, temperature, etc sensors as well as all of the standard process type signals (0-5Vdc, 4-20mA, etc).
Q: How does the HLP-10 interface to PSH's?	A: The HLP-10 has a total of six internal ports into which Interface Modules can be installed. Interface Modules expand functionality of the HLP-10 for increased analog and digital inputs and outputs, modem communication, additional memory and more. The HLP-10 includes one HLIM-9B-001 Interface Module which consumes one of the six available ports. This single HLIM-9 module handles the communication between the HyperLogger and up to 63 PSH's. With the HLIM-9 installed (as the HLP-10 is delivered) up to five more Interface Modules can be installed for additional capability.
Q: How many PSH's can I connect to an HLP-10 HyperLogger PowerPlus data logging instrument?	A: Up to 63 PSH's can be connected to a single HLP-10. The PSH's are 'daisy-chained' with a single twisted pair cable from the HyperLogger to the first PSH, then on to the second PSH, etc. A single 2-conductor twisted pair (with shield) cable is used for the interconnect wiring. With this 'daisy-chain' wiring system, multiple PSH's can be be connected to a single HLIM-9 module installed in one of the HLP-10 Interface Module ports.
Q: Can the PSH be used for measuring power on loads controlled by variable frequency drives?	A: Yes, however it is critical that the PSH connections be made on the line (i.e. the supply to the VFD) NOT the load side (i.e. the output to the controlled load) of the Variable Frequency Drive controller. Connecting the PSH on the Load side of the drive will result in inaccurate readings and may result in permanent damage to the PSH.
Q: Can cable other than Belden 1120A be used for the communication cable?	A: Yes, if the substituted cable meets the voltage insulation rating of the application and the cable is approved by local codes for the application. The UL listing on the PSH was obtained with a stipulation that the 600Vac line to line rated Belden 1120A communication cable is used. As the PSH is rated for 480Vac applications, this cable meets the insulation rating requirements for intallations at 480Vac. In applications with lower voltages in the electrical panel (eg 240Vac) a lower voltage rated cable may be substituted (eg 300 Vac) providing that local electrical codes, regulations and safety issues are all met.
Q: Does the PSH require excitation power to operate?	A: No, the PSH is powered from the voltage connections that are used to sense line voltage. No additional power supply connections are required.
Q: Can the PSH be used for single phase 240VAC power measurements?	A: Yes, for example on a 240Vac single phase 3-wire configuration (two 120Vac lines and a neutral) the third CT and voltage sense lines are not connected.
Q: How accurate are power readings from the HLP-10?	A: The PSH performs the current and voltage sensing, power calculations and conversion of the power parameters into a serial digital data stream which is communicated to the HLP-10 for recording. Hence the 1% accuracy specified on the PSH (conforming to ANSI C12.1 metering standards) is the final accuracy of the system.
Q: I notice that two models of the PSH are offered, what is the difference?	A: Two main models are offered, the 'Standard Output' version and the 'Enhanced Output' version. The Standard unit outputs only KW and KWH parameters. The Enhanced unit outputs 26 parameters including KW, KWH, kVAR, kVA, Power Factor, and individual line voltages, currents and power factors. In each of these versions, different full scale current ranges are also offered ranging from 100Aac to 2400Aac.
Q: Can I log data from the PSH conditionally, for example exceeding of a preset level?	A: Yes, inputs from the PSH are programmed for data collection and alarming just like any other input signal (eg flow, pressure, etc). During the programming sequence, icons representing each of the power parameters available within the PSH display on the screen. These icons can then be graphically integrated into the HLP-10 program with the standard HyperWare 'drag and drop' methods used for programming of other 'hard-wired' inputs. Nothing new to learn, just treat the icon like any other input channel and perform level conditional, log on change, or other intelligent logging and alarming strategies.

Home |Back to the Top | Site Map

Data Loggers | New Products | Data Logger Applications | Software for Data Loggers | Data Logger Selection Guide
Testimonials | Data Sheets and Downloads | About Logic Beach | Contact Logic Beach |Site Map |Home

Logic Beach, Incorporated
8363-6F Center Drive
La Mesa, CA 91942
Phone: (619) 698-3300
Fax: (619) 469-8604