PQube vs. X (instrument from competitors) Go Green. Know your power.™ PQube vs. X (instrument from competitors) ©2009 Power Standards Lab www.PowerStandards.com 1 1

UL-recognized, TUV-certified, CE, JS, RoHS PQube vs. X Go Green. Know your power.™ Basic features Instrument X PQube Why it’s important Basic accuracy NIST-trace Certificate ±0.05% rdg ±0.05% FS voltage at 256 samples per cycle Yes Every PQube has Certificate Necessary for green energy applications, energy savings, credible measurements Nominal Voltages for direct connection 100V - 690V, 1-phase, 3-phase, delta, wye/star 50/60 Hz World-wide applications from a single model Software required No No software to learn. No software to upgrade. Network required to be useful Avoid battles with IT department, phone issues Safety UL-recognized, TUV-certified, CE, JS, RoHS Safe, legal installation Complete energy measurements See next slides Required to understand energy Complete power quality measurements Must record all types of PQ events to decide if PQ or not Standard memory, Expanded memory 4 GB (2+ years of data) 32 GB (16+ years of data) Communication can be disrupted during PQ disturbances – backup is essential 2 2

Instrument X PQube Why it’s important PQube vs. X Complete Power Quality measurements Go Green. Know your power.™ Instrument X PQube Why it’s important Built-in UPS Yes User-replaceable battery Necessary for recording deep dips, interruptions Dips/sags, swells, interruptions IEC 61000-4-30 Class A The most common events – Class A means correct measurements High-frequency impulses Detects 1 microsecond Lightning, inductive loads Voltage THD, Current TDD to the 63th harmonic TDD per IEEE519 for correct measurements RMS flicker Arc furnaces, sensitive loads Voltage unbalance Transformer losses, overheating motors Current unbalance Easiest way to reduce power losses Underfrequency and Overfrequency Generator, UPS problems Pre- and post-trigger waveforms, RMS graphs 256 samples per cycle waveforms, plus RMS signatures Signatures of power problems Daily, weekly, monthly trends and statistics Includes cumulative probability Compliance, and long-term predictions 3 3

Instrument X PQube Why it’s important PQube vs. X Go Green. Know your power.™ Complete Energy measurements (with PQube current module) Instrument X PQube Why it’s important Amps, watts, volt-amps, VAR’s Yes Updated 5 times per second Basic meters Watt-hours, VA-hours, VAR-hours Basic energy accumulators true Power Factor Easy to reduce costs Daily, weekly, monthly trends graphs and spreadsheets 1-minute min/avg/max daily 5-min min/avg/max weekly Understand opportunities, see where energy is going Daily, weekly, monthly load duration curves, stats Identify peak demand opportunities 1-cycle peak demand 1-minute peak demand 10/15 minute peak demand Circuit breaker sizing UPS selection Transformer ratings Data storage 2+ years of 1-minute data ©2009 Power Standards Lab www.PowerStandards.com 4 4

Instrument X PQube Why it’s important PQube vs. X Go Green. Know your power.™ Easy communication (with optional ETH1 module) Instrument X PQube Why it’s important Built-in e-mail server Yes Automatically sends e-mails to you. POP, SMTP, MD5 Easiest network setup – fewest objections from IT department Built-in web site server Status, real-time meters, event graphs, trend graphs View from any web browser, anywhere in world Built-in FTP server Transfer files to/from your computer Built-in Modbus/TCP server Read real-time meters from thousands of programs Built-in network time synchronization Perfect real-time sync anywhere in the world, with 2-second absolute accuracy Fully functional without network (works with or without network) Quick installation – no IT department approvals needed. All files automatically available on pop-out SD card. ©2009 Power Standards Lab www.PowerStandards.com 5 5

Instrument X PQube Why it’s important PQube vs. X Go Green. Know your power.™ No software required – files on digital camera SD card Instrument X PQube Why it’s important Software package required No software required No training, no software packages to install, no updates, no Windows® compatibility problems Setup: Thresholds, communication, preferences Text file on SD card Edit with any text editor. Send by e-mail, or copy onto SD card. Output files: pictures Yes GIF pictures, in dual languages, straight from PQube SD card. No software required. Easy copy-paste into report. Discuss with engineers world-wide. Output files: spreadsheets Excel®-compatible CSV files, straight from PQube SD card. Do your own analysis, graphing. Output files: PQDIF IEEE PQDIF files, straight from PQube SD card. PQDIF is the IEEE Standard for power quality data – analyzed by dozens of programs PRICE (price) (list of options included) (no comment) ©2009 Power Standards Lab www.PowerStandards.com 6 6