380801-380803 V7.0 8/06
10
Glossary of Terms
W True Watt
PF Power Factor
V True RMS Voltage
A True RMS Ampere
Phase angle Time difference between V and A calculated by
cos
-1
(Power Factor)
VA Apparent Power (V * A)
VAR Reactive Power (SQRT [VA
2
– W
2
])
IR Equivalent current (through equivalent resistance)
Req Equivalent resistance
IL Equivalent current (through equivalent inductance)
XL Equivalent impedance of equivalent inductance
Leq Equivalent inductance
CAP Required capacitance
CR Carriage Return
LF Line Feed
EPS Datalogger Memory Self-test
EPE Erasing Datalogger Memory
W
3
φ
True Power (3
φ
3W)
W
RS
Power of R phase with respect to S phase
W
TS
Power of T phase with respect to S phase
VA
3
φ
Apparent Power (3
φ
3W and Balanced Load)
VAR
3
φ
Reactive Power (3
φ
3W and Balanced Load)
PF
3
φ
Power Factor (3
φ
3W and Balanced Load)
Mean Mean Value
Std Dev Standard Deviation
Best Fit A line drawn to fit a curve with minimum error
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell.
For periodic calibration, NIST certification on most products or repair of any Extech
product, call customer service for details on services available. Extech recommends that
calibration be performed on an annual basis to ensure calibration integrity.
Copyright © 2006 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or in part in any form.
Support line (781) 890-7440
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
