Air Monitor Corporation ELECTRA-flo Manual

Installation, Operation,
and Maintenance Manual
ELECTRA-flo
ThermalAirFlowMeasurementTransmitter
Version 1.1X
Installation, Operation & Maintenance
Air Monitor Corporation provides complete
technical support between the hours of
7 a.m. and 5 p.m. PST, M-F
Contact our Service Department
Toll Free: 1-800-AIRFLOW
or fax us at 1-707-526-2825
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual

ELECTRA-flo Version 1.16 Addendum.doc 6/28/2007
ADDENDUM
This addendum to the ELECTRA-flo Installation, Operation & Maintenance Manual is applicable to software version 1.16.
This software version differs from version 1.15 and earlier, in that all menus are accessed via a 4 pushbutton sequence rather
than simultaneously pressing 2 buttons.
Use the following in place of the applicable portion of Section 5.5 – PUSHBUTTON DEFINITION (page 9).
Displays ELECTRA-flo and software version number. While software version is
displayed, press and work order number and serial number will be
displayed. Press and ID (if any) will be displayed. Press and the
display will go back to the Normal operation mode.
Activates the Operator menu.
Activates the Supervisor menu.
Activates Password selection menu.
Additionally, note the above changes affect the following:
Step 1 of Section 5.6 – CONFIGURATION PROGRAMMING
Step 1 of Section 6 – SUPERVISOR MENU
then
DN
ESC
ENT UP then DN then ENT
UP
thenENT ESC then UP then ENT
then
ENT ESC then DN then ENT
then
UP DN then UP then ESC

ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual
TABLEOFCONTENTS
TABLEOF CONTENTS
INSTRUMENTWARRANTY ........................................................................................................................i
SECTION 1 – GENERAL INFORMATION
1.1 DESCRIPTION ...................................................................................................................................1
1.2 THEORYOFOPERATION.................................................................................................................1
SECTION 2 – PERFORMANCE SPECIFICATIONS
2.1 ACCURACY.......................................................................................................................................2
2.2 RANGE..............................................................................................................................................2
2.3 PROBE ASSEMBLY..........................................................................................................................2
2.4 TRANSMITTER ..................................................................................................................................2
2.5 POWER.............................................................................................................................................2
SECTION 3 – FEATURES
3.1 OPERATORMENU ...........................................................................................................................3
3.2 DATADISPLAY ..................................................................................................................................3
3.3 LARGEOPERATION RANGE ...........................................................................................................3
3.4 ENCLOSURE ....................................................................................................................................3
3.5 MULTIPLEOPERATING POWERSELECTIONS...............................................................................3
SECTION 4 – INSTALLATION
4.1 RECEIVINGANDINSPECTION .........................................................................................................4
4.2 LOCATION .........................................................................................................................................4
4.3 MOUNTING........................................................................................................................................5
4.4 PROCESSCONNECTIONS ..............................................................................................................5
4.5 POWER/SIGNALCONNECTIONS ....................................................................................................6
4.6 DISPLAYCONTRASTADJUSTMENT ................................................................................................6
SECTION 5 – OPERATION
5.1 INTRODUCTION.................................................................................................................................7
5.2 START-UP..........................................................................................................................................7
5.3 NORMALOPERATION ......................................................................................................................8
5.4 CONFIGURATION ..............................................................................................................................8
5.5 PUSHBUTTONDEFINITION ..............................................................................................................9
5.6 CONFIGURATIONPROGRAMMING........................................................................................... 10-11
5.7 OPERATORPASSWORD SELECTION ..........................................................................................12
5.8 FLOWCONFIGURATION ...........................................................................................................13-14
5.9 DISPLAYCONFIGURATION .......................................................................................................15-17
5.10 OUTPUT2PARAMETERSELECTION ............................................................................................18
5.11 LOWPASS FILTER .........................................................................................................................19
5.12 TRANSMITTEROUTPUTCALIBRATION ....................................................................................19-21
5.13 K-FACTORCONFIGURATION ....................................................................................................22-23

TABLEOF CONTENTS
SECTION 6 – SUPERVISOR MENU ........................................................................................................24
6.1 SUPERVISORPASSWORDSELECTION.......................................................................................25
6.2 SENSOR MANAGEMENT ..........................................................................................................26-28
6.3 DIAGNOSTICDISPLAY SELECTION...............................................................................................29
6.4 DIAGNOSTICALERTDETERMINATION ......................................................................................30-31
6.5 POWERCYCLESENSORNETWORK...........................................................................................32
SECTION7–MAINTENANCE
7.1 CLEANLINESS ................................................................................................................................33
7.2 MECHANICAL .................................................................................................................................33
7.3 ELECTRICAL ...................................................................................................................................33
SECTION8– CUSTOMER SERVICE
8.1 CUSTOMERSERVICE/ TECHNICAL SUPPORT ...........................................................................34
8.2 REPAIRS/RETURNS .....................................................................................................................34
8.3 WARRANTYREPAIRS /RETURNS ................................................................................................34
8.4 NON-WARRANTYREPAIRS / RETURNS .......................................................................................34
8.5 FIELDSERVICE ..............................................................................................................................34
TABLEOFCONTENTS
ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual

ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual
i
INSTRUMENT WARRANTY
NOTICE OF PROPRIETARYRIGHTS
Thisdocument contains confidentialtechnical data, includingtrade
secretsandproprietaryinformationwhicharethesolepropertyofAir
MonitorCorporation. Theuseofsaiddata is solely limited to use as
specified herein. Any other use is strictly prohibited without the
priorwritten consent ofAir Monitor Corporation.
INSTRUMENTWARRANTY
AirMonitorCorporation (hereinafterreferredtoas“Seller”)
warrants that at the time of shipment, products sold
pursuant to this contract will be free from defects in
materials and workmanship, and will conform to the
specifications furnished or approved in writing by Seller.
Nowarranty is giventhat delivered products will conform
to catalog sheets, data sheets, and the like, which are
subject to change without notice.
Seller will repair or replace, at its option, any products
listedunderthiswarrantywhichisreturnedfreightprepaid
to Seller within the earlier of three (3) years after start-up
or thirty-nine (39) months after shipment that, upon test
andexamination,provesdefectivewithin the terms of this
warranty. The warranty period for any item repaired or
replaced shall be for the time remaining on the warranty
periodof the original components. Purchasershall notify
Seller in writing of such defect within sixty (60) days of
discoveryof the defect.
This warranty does not extend to any product sold by
Seller which has been the subject of misuse, neglect,
accident, damage or malfunction caused by
interconnectionwithequipment manufactured by others,
improper installation or storage, or used in violation of
instructions furnished by Seller, nor does it extend to any
product which has been repaired or altered by persons
notexpresslyapproved by Seller. Nor doesSellerwarrant
equipmentagainstnormaldeteriorationduetoenvironment;
noritemssuch as lamps, glass,andsimilar items subject
towearorburnoutthroughusage. Adjustmentsforitems
or equipment not manufactured by Seller shall be made
totheextentofanywarrantyofthemanufacturerorsupplier
thereof.
Seller shall not be liable for any special or consequential
damagesor forlossofdamage, directlyorindirectlyarising
from the use of the products. Seller's warranty shall be
limited to replacement of defective equipment and shall
notinclude field removal andinstallation expenses.
Thewarrantysetforthaboveisinlieuofallotherwarranties
eitherexpressor implied and constitutes thefullextentof
Air Monitor Corporation’s liability to the customer, or any
otherparty for breachofwarranty.
THEREARENOEXPRESSWARRANTIESEXCEPTAS
SET FORTH HEREIN AND THERE ARE NO IMPLIED
WARRANTIES OF MERCHANTABILITY OF FITNESS
FOR ANY PARTICULAR PURPOSE, WHICH ARE
PARTICULARLYDISCLAIMED.

ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual
1
SECTION1 – GENERAL INFORMATION
1 – GENERAL INFORMATION
1.1 – DESCRIPTION
The ELECTRA-flo ThermalAir Flow Transmitter is used in conjunction with ELECTRA-flo Probe(s). One Transmitter
canreceive up to32 individual flowsensors measuring a single ducted airflow orfan.
TheTransmitter'smicroprocessoraveragesflowandtemperaturesignalsfromallsensorsandoutputsananalogsignal
and local display of these averages. The Transmitter serves as the interface for all configuration and diagnostic
functions.
1.2 – THEORY OF OPERATION
The ELECTRA-flo utilizes thermal dispersion
technology to measure airflow. As air moves across
the surface of an elevated temperature sensor, heat is
transferred from the sensor to the airflow in a
mathematically defined relationship between heat
transfer rate and airflow velocity.
Each ELECTRA-flo sensing node utilizes a pair of
precision matched thermistors. One functions as a
reference sensor measuring the ambient air
temperatureat the sensing nodelocation, and the other
thermistoris heated toa preset temperaturedifferential
(∆T)above the ambientairtemperature.Airflowvelocity
is determined using the measured ambient air
temperature, the known heat transfer characteristics
of the heated thermistor, and the power consumed to
maintain the ∆T between the two thermistors.
Using a combination of Computational Fluid
Dynamics (CFD) modeling and extensive full-scale
wind tunnel verification, the aerodynamically
optimized cross section of the sensing node aperture
prevents error inducing turbulence typical of sharp
edged sensing tubes. The aperture’s injection molded shape has been
engineered to minimize the angular flow effects
naturally present in any duct. The flared aperture
captures a representative sample of the ducted airflow,
while the contoured leading edges prevent the creation
of vortices. The center cross section of the aperture
functions in the same manner as a venturi. It stabilizes
and flattens the velocity profile at the point of
measurement ensuring the airflow maintains full
contact with the sensing thermistors. The flow
conditioning characteristic of the aperture
compensates for turbulent airflow with pitch and/or yaw
angles up to ±30 degrees and produces an accuracy
of ±2% of reading for each ELECTRA-flo sensor.

ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual
2
SECTION2 – PERFORMANCE SPECIFICATIONS
2 – PERFORMANCE SPECIFICATIONS
2.4 – TRANSMITTER
Display.
3 line, backlit graphical display. Flow on Line 1 is
double height and width for improved visibility. Lines 2
and 3 are standard size and are user selectable.
Output.
Dualanalogoutputs(0-5VDC,0-10VDC,4-20mA)
userselectableand configurable.
Configuration.
Viacovermounted membrane keypad
Filter.
Analog outputs filtered via user selectable digital low
pass filter.
Temperature Limits.
–20ºFto 180ºF Storage
–20ºFto 140º Operating
Humidity Limits.
0to 95% RH,non-condensing
2.5 – POWER
Power.
16to 90VA dependenton number ofsensor nodes (1
to32 maximum)
Circuit Protection.
Power input is isolated, fused, and reverse polarity
protected.
2.1 – ACCURACY
SensorAccuracy.
Velocity: ±2%ofReading
Temperature: ±0.1ºF
Overall System Accuracy.
Flow: ±2-3% ofActual Flow
Temperature: ±0.1ºFofAirTemperature
2.2 – RANGE
Velocity Calibration Range. 0 to 5,000 FPM
2.3 – PROBE ASSEMBLY
Mounting.
4" x 4" aluminum plate with four 0.25" holes for
fastenersandneoprenegasket.
Length.
8" up to 120"
Sensors Per Probe.
Maximumof16
Connection.
ProbetoProbe via RJ-45 cableforsignal and power.
ProbetoTransmitterviashieldedcable with RJ-45
connection. 10' length standard with optional 50' and
100'lengths.
Temperature Limits.
–20ºFto 180ºF Storage
–20ºFto 140º Operating
Humidity Limits.
0to 95% RH,non-condensing.

ELECTRA-flo
Air Monitor Corporation
116-053-00.P65(7/06) ELECTRA-flo-IO&MManual
3
SECTION 3 – FEATURES
3 – FEATURES
3.1 – OPERATOR MENU
Themicroprocessor program contains aOperator menu systemforselecting parameters. Four
pushbuttons , , , and allow the operator access to the menu for setting configuration modes
andvalues. Refer to the ConfigurationProgramming (Section 5.6) instructionsfor operation details.
Also contained in the Operator menu is an output calibration feature. The calibration method is completely digital
and contains no analog potentiometer adjustments which are susceptible to drift. Non-volatile memory is used for
storingall setup parametersand calibration values, and willremain unchanged afterset, even whenpower to theunit
isoff.
3.2 – DATA DISPLAY
The ELECTRA-flo Thermal Air Flow Transmitter utilizes a high visibility backlit graphical LCD. 3/4" x 2-1/2" display
with three lines of process data, selectable for U.S. or S.I. units. Also used for configuration interface.
3.3 – LARGE OPERATION RANGE
TheELECTRA-flo ThermalAir Flow System can maintain accurate and linear output of flows from 0 to 5,000 FPM.
3.4 – ENCLOSURE
TheELECTRA-floThermalAirFlow Transmitter is housed in an aluminumNEMA 1 enclosure with hinged front cover
for access to power and signal terminals for field connection.
3.5 – MULTIPLE OPERATING POWER SELECTIONS
TheELECTRA-floThermalAirFlowTransmittercanbepoweredbyeither 24VAC or 24VDC.
UP DN ENT ESC