Intelligent Hand-Held
Terminal (IHT)
Remote Operation with full
3-Phase Instrumentation
Modbus Interface Provides
Integration with PLC, HMI, or
SCADA Systems
Rugged and Lightweight Design
with Sealed Membrane Controls
includes a 30 ft. [10 meter]
Interconnect Cable
An Avtron load bank with Froment Intelligent HandHeld Terminal (IHT) Sigma™ load control and instrumentation is the leader in simplicity, ease of use, and accuracy.
The Sigma 2 brings a powerful, yet
cost effective solution to today’s
power testing requirements. It provides high level instrumentation, data
capture, and verification.
The Sigma 2 load bank module is installed in the load bank with Voltage
and Current Transformers (VTs and
CTs). It is the control interface for all
the functions within the load bank.
• Robust Purpose Designed Microprocessor-Based Module with Industrial Connectors and LED Status Display
• Usage Counters provide Information on
Individual Contactor Operation, Element
Run Times, Overall Power-on Time,
Load-on Time, and KWH
• Large Flash Memory allows Remote
Upgrading and Space for Configuration
Data and Calibration Maps
• Non-Volatile RAM provides 500 Event
History Log Time Stamped by On-Board
Real Time Clock
• Element On-Time Balancing provides
for Enhanced Element Life and Insulation Resistance
Fast and Accurate Testing with
Maximum Efficiency
• Load Correction Facility compensates
for any Voltage Drop on Supply
• Load Bank is protected against OverVoltage
• Load Bank Cooling Fan automatically
Starts and Stops as required
Legendary quality combined with simple operation and maintenance will
provide years of trouble free service.
• Load Monitoring Checks each Phase
for Faulty Contactors, Blown Fuses, or
Faulty Elements. Faults are Logged with
Visual Indication via Blinking Stop Lamp
and Warning Code
Avtron’s extensive line of Load Bank
and Industrial Resis­tor Products are
solid performers used throughout
the world.
• Automatic Detection Senses the SupplyOn-Test Voltage, Frequency, Phase, and
Phase Rotation
For total technical support or
additional information, please
contact Avtron at (216) 573-7600
or LBsales@emerson.com.
• 24 VDC Supply Voltage with 24 VDC
Input and Outputs
power test solutions
Intelligent Hand-Held Terminal (IHT)
IHT HARDWARE:
The IHT provides full load control
and 3-Phase instrumentation.
The IHT provides enhanced load
control and instrumentation.
• Robust Hand-Held Terminal Housed in
Industrial Polycarbonate/Polyamide Enclosure with PVC Hand Grips providing
IP65 Protection
• All instrumentation measurements
are made using high accuracy voltage and current transformers located
within the load bank. This information
is processed digitally, using high speed
sampling of the raw data. This provides
full 3-phase, high speed, true RMS
measurements with high updates rates
to class 0.5 accuracy.
• Membrane Keyboard and Back-Lit
Graphic LCD
• Operation and Data Capture
• Display Pages Show All the Main
Electrical Parameters
• The Displays are designed to Simplify
the Testing, Setup, and Adjustment of
Gen-Sets and UPS Systems
• Large Display of Voltage and Frequency
Assist with Initial Set-up
SPECIFICATIONS:
WEIGHT: 3.75 lbs [1.70 kg]
DIMENSIONS:
9.31 x 7.50 [236.47 x 190.50]
including lugs: 9.31 x 8.25
[236.47 x 209.55]
OPTIONS:
• Site Load Correction (SLC)
Automatically Prevents Problems
Associated with Light Loading
• SIGMA PC Software
• Calculation of rated line current and
kilowatts
When carrying out full-load testing, one
page shows all the true RMS 3-Phase measurements of voltage (V), frequency (Hz),
current (A), power (both KW and KVA), and
power factor (Cos Ø).
• No need for any pre-calculations
• Comprehensive overload and stall protection is provided, based on the rating
of the supply-on-test.
• Performs transient load tests
• Automated load control provides multiple timed load steps including manual
override and cyclic testing
• In-built test editors allow easy set up
of load including percent load, power
factor, and time.
For transient-response testing, the voltage
and frequency of the last load change are
captured and displayed on the dynamic graph
including maximum and minimum data.
• Manual control via selection of kW,
percent load,
or kVA.
• Simple plug/socket connections allow
multiple Avtron Load Banks of differing
capacities and combination: resistive,
inductive, or combined may be connected and controlled from one Intelligent Hand-Held Terminal (IHT) or PC
(with optional software).
• Operation up to a 3,280’ from load bank.
The status line includes the elapsed time
since the last load was applied.
• Multilingual user interfaces include
English, French, German, Spanish, and
Italian.
Load selection is displayed in a “popup”
window over the instrumentation while the
load is being changed.
SIGMA™ is a trademark of NJ Froment & Co. Ltd., Easton on the Hill, Stamford UK PE9 3NP
All dimensions are in inches [millimeters]. Specifications subject to change without notice.
Quality System Certified to ISO 9001
6255 Halle Drive • Cleveland, Ohio, U.S.A. 44125-4615 • 216.573.7600 • FAX 216.573.5953
www.avtronloadbank.com • LBsales@emerson.com Bulletin
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