Greentrol Automation GreenFlow 2000 Series Owner's manual

TM_GF-A2100_2200_R1B
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
GreenFlow 2000 Series
Models
GF-A2100, GF-A2200
Technical Manual
Air Flow Measurement with PID Control Output and Alarm - Analog Output
Part Number: 960-0220
Automation, Inc.
™
Greentrol Automation, Inc.
Installation, Operation and Maintenance Technical Manual
GF-A2100
GF-A2200
Dual Analog Output Air Flow Measurement with
PID Control and Programmable Alarm Options
Document Name: TM_GF-A2100_2200_R1B
GF-2000 Transmitter
Universal Mount Probes
Adjustable Insertion Mount Probes
S-110 Air Flow Sensor Probes
Model GF-A2100 (Supplied with One Probe)
Model GF-A2200 (Supplied with Two Probes)

Automation, Inc.
™
2
TM_GF-A2100_2200_R1B
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
LIST OF EFFECTIVE AND CHANGED PAGES
Insert latest changed pages (i
in bold text
); remove and dispose of superseded pages.
Total number of pages in this manual is 28.
Page No Revision * Description of Change Date
1, 2 . . . . . . . . . .R1B . . . . . . . . . .Changed revision to R1B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .05-07-2014
5, 6 . . . . . . . . . .R1B . . . . . . . . . .Corrected enclosure flame rating to 94V-0 (was 94-5VA) . . . . . . . .05-07-2014
1-28 . . . . . . . . . .R1A . . . . . . . . . .Initial document release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .03/06/2014

Automation, Inc.
™
TM_GF-A2100_2200_R1A
3
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Copyright © 2014 - All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained
within this document is subject to change without notice. All rights reserved.
Table of Contents
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Preparation for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Universal Mounting Bracket Probe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Universal Mounting Bracket Probes for Unit Ventilator and OA Damper Hood Applications . . . . . . . . . . . . . . . . . . . . . . . .8
Insertion Mounting Bracket Probe Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Transmitter Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Transmitter Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Power Transformer Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Analog/PID Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Alarm Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Sensor Probe Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Initial Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Alarm Interface, Options and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Alarm Interface (LED PWR Jumper) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Alarm Source (ALR SRC=) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Alarm Type (ALR TYP=) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Converting Analog Output Signal Values for Airflow and Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Sending a Test Output Signal to the Host Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
GF-A2100/GF-A2200 TRANSMITTER SET UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Start Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Transmitter Initialization Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Changing the System of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
GF-A2100/GF-A2200 LCD Display Notifications and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LCD Scrolling Control Feature (SYS CFG=DUAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LCD Display Last character is an asterisk * (Scrolling Feature Engaged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
LCD Display Last character is shown in lower case (Probe Malfunction) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
LCD Displays All Characters of Flow Rate Units in Lower Case (Field Cal Wizard Engaged) . . . . . . . . . . . . . . . . . . .22
LCD Blinks ** LOW ALARM **, ** HIGH ALARM ** or ** TRBL ALARM ** . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
CHANGING FACTORY DEFAULT SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Setup Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Output Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Locking the Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
VIEWING SENSOR DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
TRANSMITTER CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
FIELD ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Altitude Correction Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Adjusting the Low Limit Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Adjusting the Digital Output Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Field Calibration Wizard - Adjustment of Factory Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Overview of the Field Calibration Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Engaging and Using the Field Calibration Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Navigating through the Field Calibration Wizard Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
GREENTROL STANDARD LIMITED PARTS WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Automation, Inc.
™
4
TM_GF-A2100_2200_R1B
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Figure 1. GF-A2100/GF-A2200 Airflow Measurement Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 2. GF-A2100/GF-A2200 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Figure 3. Universal Mount Probe and Bracket Mechanical Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 4. Universal Mount Probe Detail for Unit Ventilator and OA Damper Hood Applications . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 5. Insertion Mount Probe and Bracket Mechanical Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 6. GF-A2100 Single Probe Insertion Mount Detail for Economizer Hood and Duct Applications . . . . . . . . . . . . . . . . .10
Figure 7. GF-A2200 Two Probe Insertion Mount Detail for Economizer Hood and Duct Applications . . . . . . . . . . . . . . . . . . .11
Figure 8. GF-A2100/GF-A2200 Transmitter Mechanical Detail Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 10. GF-A2100/GF-A2200 Wiring Diagram Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 9. GF-A2100/GF-A2200 Main Circuit Board Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 11. Transmitter Start Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 12. Transmitter Initialization Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 13. System of Units Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 14. Factory Default Lock Menu Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 15. GF-A2100/GF-A2200 Setup Menu Option (“IP SYS”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 16. Field Calibration Wizard Menu (all System of Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
List of Figures
Table 1. GF-A2100/GF-A2200 Analog Output Flow and Temperature Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 2. Standard “IP” and “SI” Menu System of Units Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Table 3. Factory Default Setup Menu Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Table 4. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
List of Tables

Automation, Inc.
™
TM_GF-A2100_2200_R1B
5
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
OVERVIEW
Models GF-A2100 and GF-A2200 are high quality economi-
cal programmable dual-output airflow/temperature meas-
urement and control instruments with options for analog air
flow, temperature, alarm, and corresponding PID control out-
puts for control of airflow set points. They are designed for
installation in specified critical applications that require pre-
cise measurement of air flow (down to zero flow) and temper-
ature, with available PID control for air flow set point. The
instrument includes factory calibrated probes (one with GF-
A2100, two with GF-A2200) and an advanced microproces-
sor controlled transmitter/controller with typical sensor accu-
racy of 3% of reading (4% maximum)* from 0 - 2,000 FPM.
Figure 1. GF-A2100/GF-A2200
Airflow Measurement Station
* Sensor accuracy is the calibrated accuracy of the individual sensor. The installed accuracy of the overall airflow station is application-dependent on the resulting sen-
sor density; typically better than 15% of reading.
Each sensor probe is equipped with a high reliability bead-in-glass heated thermistor element, factory calibrated to NIST
traceable standards from zero flow to 2,000 FPM. The transmitter is fully independent of the probe and does not require
field matching to the probe. An advanced microprocessor processes the raw probe signals and provides versatile pro-
grammable airflow measurement and alarm options with direct LED drive or N.O./N.C. relay dry contacts, and selectable
analog output signal options. A powerful variable input signal integration option can be engaged to reduce the effects
of transient input signal variations, and an innovative Field Calibration Wizard allows for simple, automated field adjust-
ment of the instrument if required. A 16 character LCD display indicates airflow, temperature, system status and is also
used for configuration and diagnostics. Field configuration is accomplished using a simple four-button user interface.
Individual airflow and temperature measurements can be displayed for use in HVAC system diagnostics.
An input signal filter with variable buffer integration can be engaged for transient flows, and a process low limit can be
set to force the output to zero when the airflow rate falls below a low limit. Both features are beneficial on outside air
intakes affected by transient wind gusts at low airflow rates. A simple to use Field Calibration Wizard permits one or two
point field adjustment to factory calibration for installations that require field calibration or adjustment. The transmitter
provides two independent programmable analog outputs with full scale ranges of 0-10VDC, 0-5VDC or 2-10VDC.
SPECIFICATIONS
System:
•Sensor Accuracy*: ± 3% of reading typical (4% maximum)
•Calibrated Range: 0 to 2,000 fpm [10.16 m/s]
•Operating Temperature: Transmitter: -20 to 120°F [-28.9 to 48.9°C]
Sensor: -20 to 160°F [-28.9 to 71.1°C]
•Operating Humidity Range: 0 to 99% non-condensing and protected
from exposure to precipitation.
•Power Requirements: 24 VAC (22.8-26.4 VAC) at 8VA maximum
Transmitter Enclosure
•Enclosure Material: Durable UL94V-0 rated electronic housing and
removable cover
•Transmitter Dimensions:
3.570 x 5.002 x 1.502 in (HxWxD) [90.68 x 127.05 x 38.15 mm],
with two integral 0.502 [12.75 mm] mounting flanges. Overall width
with flanges 6.006 [152.55 mm]
•Transmitter Mounting: Two 0.190 in [4.76 mm] diameter holes on
left/right mounting flanges
Sensor Probe
•Probe Construction: Type 6063 aluminum standard
•Mounting Brackets: Universal mounting brackets or adjustable inser-
tion mounting brackets
•Probe Dimensions: 0.75 in [19.05 mm] diameter
•Standard Sizes: 8 and 16 inches [203.2 and 406.4 mm]
•Probes / Sensing Nodes: GF2100: 1 probe / 1 sensing node max.
GF2200: 2 probes / 1 sensing node max.
•Probe/Transmitter Cable: Standard 10 ft [3.05m] durable FEP
plenum-rated jacket with circular DIN plug; Optional length up to 50 ft
[15.24m]
Output Interface
•Analog Output: Non-isolated 0-10, 0-5 or 2-10 VDC (20 mA max.)
•Output Resolution: 0.021% FS: 0-10/2-10VDC; 0.42% FS: 0-5VDC
•Output Load: 500 ohm minimum (20 mA max)
Programmable Output Alarm Options:
•Airflow Low limit, High limit, Dead Band alarm/control output
(% above or below a specified flow) or System Trouble Alarm
•Alarm type: Selectable dry relay contacts, 30VDC/24VAC
3 Amps maximum or direct LED drive (15 mA typ) and local LCD
Programmable PID Control and Input Filter Options:
•Output can be configured as a PID control for air flow set point
•Powerful input signal filter with variable integration buffering
Field Cal Wizard:
•Automated menu-driven field adjustment of factory calibration if
required
System Diagnostics
•Sensor/transmitter diagnostic mode with notification
Warranty
•12 months from shipment
Model GF-A2100 (1 Probe)
Model GF-A2200 (2 Probes)
Universal
Mount
Adjustable
Insertion Mount

Automation, Inc.
™
6
TM_GF-A2100_2200_R1B
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
FEATURES
INSTALLATION
Installation consists first of installing the sensor probe(s), then installing the transmitter, and last, installing the power
and analog signal wiring to the airflow station. The following paragraphs detail the individual procedures and steps
required for installation of the single probe GF-A2100 and dual probe GF-A2200. Convenient check boxes are included
at each step.
Preparation for Installation
1. Determine the GreenTrol factory specified location for the GF-A2100/GF-A2200 airflow measuring station trans-
mitter and probe as indicated on the engineer's plans. Ensure that the cable supplied with the probe is of sufficient
length to reach the planned transmitter installation site. It is recommended that the probe be installed first to
ensure that the included cable will reach the transmitter after allowance for routing and securing the cable.
2. Carefully unpack the GF-A2100/GF-A2200 and inspect the transmitter and probe(s) for damage. If damage is
noted, immediately file a claim with carrier. Proceed to install the GF-A2100/GF-A2200 sensor probe(s) as outlined
in the appropriate procedures that follow for Universal Mounting Brackets or for Insertion Mounting Brackets.
UL94V-0 rated enclosure with
integral mounting tabs
16-character LCD display
Removable cover for access to
simple field-programming interface
Versatile programmable alarm with
relay dry contacts or direct drive for
external alarm LED
Connectors and durable plenum
cables for ‘plug-and-play’ operation
S-110 Universal mount bracket
with Factory calibrated sensor probe
S-110 Adjustable insertion mount
with Factory calibrated sensor probe
T-2000 Transmitter
S-110 Probes
(1 with GF-A2100; 2 with GF-A2200)
Figure 2. GF-A2100/GF-A2200 Features

Automation, Inc.
™
TM_GF-A2100_2200_R1A
7
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Universal Mounting Bracket Probe Installation
The installation objective is to install probes so that the probe sensor center line is located at the exact position in
the duct/plenum as shown in Figure 4.
1. Sensor probes must be installed at the factory-specified location using the integral universal bracket attached as
shown in Figure 3. The universal bracket consists of a rubber probe clamp that is attached to the bracket using the
included hardware. Probes can be rotated within the clamp, and the clamp can be rotated and mounted at any point
along the 4-inch slot on the mounting bracket, thus providing complete mounting flexibility and adjustment.
Assemble probe to the clamp and bracket so that when mounted, air flow is through the probe sensor opening, and
in the same direction printed on the probe label.
2. Using the engineer’s plans, mark the two mounting holes for each probe bracket at the GreenTrol factory-speci-
fied location where the probe(s) will be installed.
3. Drill holes suitable for the hardware that will be used to secure the bracket at two locations.
4. Carefully align the bracket mounting holes with the holes prepared in the previous step.
5. Secure each probe bracket and probe in two places through each bracket using suitable hardware. Adjust each
bracket mount and/or probe clamp so that the airflow arrow printed on the probe is oriented in the direction of actu-
al airflow.
6. Route each sensor probe cable to the planned transmitter site and install transmitter as outlined in the TRANS-
MITTER INSTALLATION procedure that follows.
Figure 3. Universal Mount Probe and Bracket Mechanical Detail
UNIVERSAL MOUNT PROBE AND BRACKET MECHANICAL DETAIL
BRACKET END VIEW
5.00 (127)
4.00 (101.6)
ADJ RANGE
ADJUSTABLE
MOUNTING
HARDWARE
PROBE
PROBE
CLAMP
1.10
(27.9)
3.00
(76.2)
0
SIDE
VIEW
BRACKET
CLAMP
PROBE
FRONT
VIEW
PROBE CLAMP
304 STAINLESS
WITH EPDM
CUSHION
0.27 DIA
HOLE THRU
0.22 (5.5)
0
0.50 (12.7)
1.06 (26.9)
PROBE CLAMP DETAIL
0.89 (22.6)
0.19 DIA (2 PL)
PROBE CLAMP
0.06 (1.52)
0.48 (12.1)
TOP VIEW
0
0.88
(22.2)
0.44 (11.1)
1.10 (27.9)
2.53
(64.13)
3.00
(76.2)
2.11
(53.6)
PROBE
NOTES:
1. DIMENSIONS IN INCHES
(MILLIMETERS).
0.19 (4.8)
0.06 (1.52)
SIDE VIEW
4.00 (101.6)
ADJ RANGE
0.25 (6.4)
PROBE
CLAMP
PLENUM
CABLE
SENSOR
PROBE
ADJUSTABLE
MOUNTING
BRACKET
SENSOR
ELEMENTS
0.75
(19)
0
0.88
(22.2)
0.44 (11.1)
4.25 (108)
5.00 (127)
8.00 (203.2)
STANDARD UNIVERSAL BRACKET SHOWN. FACTORY DESIGNED BRACKET SOLUTIONS ARE AVAILABLE FOR ANY MOUNTING APPLICATION.

Automation, Inc.
™
8
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
½ X .¼ X ¼ X
‘Y’
UNOBSTRUCTED
PROBE
MOUNTING
HEIGHT
½ Y
OA OPENING FREE AREA
SENSOR 1
CENTER
LOCATION
SENSOR 1
CENTER
LOCATION
SENSOR 2
CENTER
LOCATION
‘X’
UNOBSTRUCTED PROBE MOUNTING WIDTH
INSTALL PROBES SO THAT SENSOR CENTER IS AT A DISTANCE OF ¼ X FROM THE LEFT
AND RIGHT EDGES, AND CENTERED IN THE HEIGHT OF THE UNOBSTRUCTED OPENING.
GF-A2200 (two probe) Unit Ventilator Application
Universal Mount Probe Applications
2 ½” UPSTREAM OF
OA DAMPER BLADE
EDGE AT 100% OPEN
¼ X
LEFT SENSOR
CENTER
LOCATION
PLANE OF THE
EDGE OF OA DAMPER
BLADES AT 100% OPEN
‘X’
UNOBSTRUCTED PROBE MOUNTING WIDTH
‘Y’
UNOBSTRUCTED
PROBE
MOUNTING
HEIGHT ½ Y
½ Y
¼ X
2 ½” UPSTREAM OF
OA DAMPER BLADE
EDGE AT 100% OPEN
¼ X
RIGHT SENSOR
CENTER
LOCATION
AIRFL
O
W
GF-A2200 (two probe) OA Damper Hood Application
Universal Mounting Bracket Probes for Unit Ventilator and OA Damper Hood Applications
Figure 4 details the two probe model GF-A2200 installation in typical Unit Ventilator and OA Hood applications. Install
probes as outlined in the previous Universal Mounting Bracket Probe Installation procedure.
Figure 4. Universal Mount Probe Detail for Unit Ventilator and OA Damper Hood Applications

Automation, Inc.
™
TM_GF-A2100_2200_R1A
9
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Insertion Mounting Bracket Probe Installation
The installation objective is to install probes so that the probe sensor center location is at the exact position in the
duct/plenum as shown in Figure 6 (for single probe model GF-A2100) or Figure 7 (for two-probe model GF-A2200).
1. For the duct/plenum probe insertion point mark, measure and record the duct/plenum height at the side where
the probe is to be installed as shown in Figures 5 through 7. At 1/2 of the measured duct/plenum height, mark the
probe insertion point on the duct/plenum to ensure that when the probe is inserted, its sensor center location will
be at the exact position in the duct/plenum as shown in Figure 6 (for GF-A2100) or Figure 7 (for GF-A2200)
2. 
For single probe model GF-A2100:
For the probe insertion depth mark, refer to Figures 5 and 6. Calculate and record the sum of (1
1/2
of dimension ‘D’
+ 3 inches {76.2 mm} + insertion wall insulation thickness). Measure from the non-cabled end of the probe and
mark the probe across the factory score line at this point. This will serve as the probe insertion mark.
OR

For two probe model GF-A2200:
For the probe insertion depth mark, refer to Figures 5 and 7. Calculate and record the sum of (1
1/4
of dimension ‘D’
+ 3 inches {76.2 mm} + insertion wall insulation thickness). Measure from the non-cabled end of each probe and
mark each probe across the factory score line at this point. This will serve as the probe insertion mark.
3. Prepare the probe insertion hole(s) (one for the GF-A2100, two holes for the GF-A2200) at the location(s) marked
in step 1 using a 0.875 inches (22.2 mm) hole saw.
4. Temporarily slide the probe and bracket through the hole prepared in step 3 so that the airflow label on the brack-
et is parallel to and in the same direction of duct/plenum airflow. Mark the four mounting bracket hole locations for
each probe.
5. Remove probe from duct/plenum and then prepare suitable mounting holes for the field supplied hardware that
will be used to secure the mounting bracket.
6. Slide the gasket seal down the probe body to the bracket. Carefully position the probe in the insertion hole pre-
pared in step 3 so that the airflow label on the bracket is aligned with the actual airflow in the duct/plenum. Insert
the probe so that the probe insertion depth mark (step 2) is just visible at the insertion mark target on the nylon
bracket block. Secure the probe at this location using the setscrew on the mounting bracket nylon block. (Refer to
Figures 5 and 7 for detail).
7. Ensure that the edge of the probe mounting bracket is parallel to the edge of the duct, and that the airflow arrow
printed on it is oriented in the same direction as duct/plenum airflow. Secure the probe mounting bracket at the four
holes prepared in step 5 using suitable hardware.
8. For two probe model GF-A2200, repeat steps 4 through 7 for the remaining probe supplied.
9. Route the sensor probe cable(s) to the transmitter location.
10. Install transmitter as outlined in the TRANSMITTER INSTALLATION section of this document.
Figure 5. Insertion Mount Probe and Bracket Mechanical Detail
1.62
(41.15)
0.250
(6.35)
2.370 (60.2)
PROBE
BODY
NYLON
BLOCK
GASKET
SEAL
BRACKET
PROBE
CABLE
2.620 (66.65)
INSERTION MOUNT BRACKET
TOP VIEW DETAIL
INSERTION MOUNT BRACKET
ROTATED VIEW DETAIL
INSERTION MOUNT BRACKET
A-A END VIEW DETAIL
2.370 (60.20)
0.250
(6.35)
1.310 (33.27)
2.620 (66.65)
0.375
(9.53)
1.000
(25.4)
1.625 (41.28)
AIRFLOW
2.000 (50.8)
PROBE
ALIGNMENT
GUIDE
PROBE
SET SCREW
PROBE
CABLE
AA
AIRFLOW
AIRFLOW
LABEL
INSERTION
MARK TARGET

Automation, Inc.
™
10
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Figure 6. GF-A2100 Single Probe Insertion Mount Detail for Economizer Hood and Duct Applications
1.38
(35 mm)
½ ‘D’
‘D’ = DUCT/
PLENUM
INSIDE
DIMENSION
(FREE AREA)
1.62
(41.2 mm)
SENSOR CENTER LINE
WALL INSULATION*
WALL INSULATION*
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
* NOTES:
1. For OA damper applications, install airflow
probes within economizer hood with probe
sensor center lines located at a minimum
distance of 2.5“ (63.5mm) upstream of the OA
damper blade edge when at 100% open at
location shown in detail.
2. For Ducts/Plenums with internal insulation,
the unobstructed inside Dimension ‘D’ is
measured from the insulation surfaces.
AIRFLOW
AIRFLOW
AIRFLOW
WALL INSULATION*
WALL INSULATION*
2.5
(63.5mm)
MIN
DAMPER BLADES
(LOCATE SENSOR CENTER LINE AT
2.5" {63.5MM} FROM FULL OPEN BLADE EDGE)
DAMPER
ACTUATOR
TOP VIEW (LOOKING DOWNWARD) SHOWING ECONOMIZER HOOD PROBE INSTALLATION DETAIL
HOOD
PROBE MOUNTING SURFACE
ALIGN USER PREPARED INSERTION MARK AND FACTORY
GUIDE SCORE LINE AT NOTCH ON BLOCK.
SECURE PROBE SET SCREW.
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (½ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {½ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM THE NON-CABLED END OF PROBE.
PROBE INSERTION FACTORY GUIDE SCORE LINE
PROBE ALIGNMENT SET SCREW
NYLON BLOCK
PREPARE PROBE INSERTION HOLE
0.875" (22.23 mm)
(SEE TECH MANUAL FOR PROBE
PLACEMENT GUIDE)
!!! NOTE !!!
PROBE AIRFLOW DIRECTION LABELS MUST MATCH DUCT AIRFLOW DIRECTION
AIRFLOW
PROBE MOUNTING SURFACE
AIRFLOW
AIRFLOW
½ ‘D’
‘D’
For Ducts/Plenums
with internal insulation,
the unobstructed inside
Dimension ‘D’ is
measured from the
insulation surfaces.
TOP VIEW (LOOKING DOWNWARD) SHOWING
DUCT PROBE INSTALLATION DETAIL
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (½ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {½ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM THE NON-CABLED END OF PROBE.
ALIGN USER PREPARED INSERTION MARK AND FACTORY GUIDE
SCORE LINE AT NOTCH ON BLOCK. SECURE PROBE SET SCREW.
PROBE
SET
SCREW
PROBE
SEAL
PROBE
MOUNTING
BRACKET
PROBE BRACKET MOUNTING SCREWS
(4 REQ’D - FIELD SUPPLIED)
! ! ! PROBE AIRFLOW DIRECTION LABELS MUST
MATCH ACTUAL AIRFLOW DIRECTION ! ! !
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (½ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {½ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM NON-CABLED END
GUIDE
SCORE LINE
AIRFLOW
AIRFLOW
SENSOR
CENTER
LOCATION
GF-A2100 (Single probe) Economizer Hood Application
GF-A2100 (Single probe) Ducted Application

Automation, Inc.
™
TM_GF-A2100_2200_R1A
11
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Figure 7. GF-A2200 Two Probe Insertion Mount Detail for Economizer Hood and Duct Applications
1.38
(35 mm)
‘D’ = DUCT/
PLENUM
INSIDE
DIMENSION
(FREE AREA)
1.62
(41.2 mm)
WALL INSULATION*
WALL INSULATION*
AIRFLOW
AIRFLOW
* NOTES:
1. For OA damper applications, install airflow
probes within economizer hood with probe
sensor center lines located at a minimum
distance of 2.5“ (63.5mm) upstream of the OA
damper blade edge when at 100% open at
location shown in detail.
2. For Ducts/Plenums with internal insulation,
the unobstructed inside Dimension ‘D’ is
measured from the insulation surfaces.
AIRFLOW
AIRFLOW
WALL INSULATION*
WALL INSULATION*
DAMPER BLADES
(LOCATE SENSOR CENTER LINE AT
2.5" {63.5MM} FROM FULL OPEN BLADE EDGE)
DAMPER
ACTUATOR
TOP VIEW (LOOKING DOWNWARD) SHOWING
ECONOMIZER HOOD PROBE INSTALLATION DETAIL
HOOD
PROBE MOUNTING SURFACE
ALIGN USER PREPARED INSERTION MARK AND FACTORY
GUIDE SCORE LINE AT NOTCH ON BLOCK.
SECURE PROBE SET SCREW.
AIRFLOW
AIRFLOW
¼ ‘D’
SENSOR
CENTER LINE
¼ ‘D’
2.5
(63.5mm)
MIN
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (¼ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {¼ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM THE NON-CABLED END OF PROBE
PROBE INSERTION FACTORY GUIDE SCORE LINE
SENSOR
CENTER LINE
PROBE ALIGNMENT SET SCREW
NYLON BLOCK
Note: Probe and bracket are
rotated 180°. Markings, set
screw and labels are on far side.
PROBE
SET
SCREW
PROBE
SEAL
PROBE
MOUNTING
BRACKET
PROBE BRACKET MOUNTING SCREWS
(4 REQ’D - FIELD SUPPLIED)
! ! ! PROBE AIRFLOW DIRECTION LABELS MUST
MATCH ACTUAL AIRFLOW DIRECTION ! ! !
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (¼ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {¼ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM NON-CABLED END
GUIDE
SCORE LINE
AIRFLOW
AIRFLOW
SENSOR
CENTER
LOCATION
PREPARE PROBE INSERTION HOLES
0.875" (22.23 mm)
(SEE TECH MANUAL FOR PROBE
PLACEMENT GUIDE)
!!! NOTE !!!
PROBE AIRFLOW DIRECTION LABELS MUST
MATCH DUCT/PLENUM AIRFLOW DIRECTION
AIRFLOW
PROBE MOUNTING SURFACE
AIRFLOW
AIRFLOW
¼ ‘D’
¼ ‘D’
AIRFLOW
‘D’
*For Ducts/Plenums with internal insulation,
the unobstructed inside Dimension ‘D’ is
measured from the insulation surfaces.
TOP VIEW (LOOKING DOWNWARD) SHOWING
DUCT/PLENUM PROBE INSTALLATION DETAIL
PREPARE AN INSERTION MARK ACROSS FACTORY GUIDE MARK AT
3 + (¼ X ‘D’) + (½ WALL INSULATION) inches
(76.2 + {¼ X ‘D’} + {½ WALL INSULATION}) mm
MEASURED FROM NON-CABLED END.
ALIGN USER PREPARED INSERTION MARK AND FACTORY GUIDE
SCORE LINE AT NOTCH ON BLOCK. SECURE PROBE SET SCREW.
WALL INSULATION*
AIRFLOW
Note: Probe and
bracket are
rotated 180°.
Markings, set
screw and labels
are on far side.
GF-A2200 (Two probe) Economizer Hood Application
GF-A2200 (Two probe) Ducted Application

Automation, Inc.
™
12
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Transmitter Installation
The transmitter is designed for use in an environment between -20° F to 120° F (-28.8° C to 48.8° C) where it will not
be exposed to rain or snow. In locations where precipitation may be encountered, a NEMA-4 enclosure must be provid-
ed to enclose the GF-A2100/GF-A2200 transmitter.
Mount the transmitter upright in a field accessible location with sufficient service clearance to permit cover removal. The
enclosure (Figure 8) is designed to accept signal and power wiring at the bottom-right of the enclosure. Ensure that the
planned location of the transmitter will allow each sensor probe cable to reach the receptacle at the bottom-left of the
transmitter enclosure.
1. Using the engineer’s plans, locate where the transmitter will be installed.
2. Refer to Figure 8 and mark the two mounting holes located on each of the side flanges of the transmitter.
3. Drill two holes suitable for the hardware that will be used to secure the transmitter.
4. Secure the transmitter in two places using suitable hardware.
5. Connect wiring to transmitter as outlined in the following procedure.
CAUTION
In locations exposed to direct rain and/or snow, the transmitter must be enclosed in a NEMA4
enclosure.
Provide sufficient clearance around the transmitter to permit cover removal and to allow for heat
dissipation.
Locate the transmitter in a location that can be reached by the connecting cable from the sensor
probe.
Do not drill into the transmitter enclosure since doing so may damage the electronics.
Figure 8. GF-A2100/GF-A2200 Transmitter Mechanical Detail Drawing
6.006
5.510
0.190 (2 PLCS.)
0.188 (4 PLCS.)
2.915 .
(2 PLCS.)
4.415 (2 PLCS.)
MOUNTING
FLANGES
1.440
(4 PLCS.)
1.502
0.080
3.570
3.502
LCD DISPLAY
CUTOUT
5.002
5.002
0.072 WALL THK. (TYP.)
2.478
1.130
1.588
0.808
0.720 0.3125
0.392
1.502
0.125 (2 PLCS.)
PROBE
CONNECTOR
CUTOUTS
WIRING
ACCESS
CUTOUT
O 0.688
(2 PLCS)
2.066

Automation, Inc.
™
TM_GF-A2100_2200_R1A
13
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Transmitter Wiring
Transmitter wiring consists of connecting the 24VAC input power, the analog output signal wires and optional alarm out-
put wires at the GF-A2100/GF-A2200. Refer to Figures 9 and 10 for additional detail. Following installation, the airflow
measurement station is ready for operation. Custom setup options (other than the default values) can be entered in the
GF-A2100/GF-A2200 Transmitter Setup procedure detailed later in this document.
Power Transformer Considerations
Select a 24 VAC transformer based on the maximum power requirements of the transmitter (8VA) to ensure that the oper-
ating supply voltage to the transmitter (when powered “ON” with probe connected) is not less than 22.8 VAC or greater
than 26.4 VAC.
Power Connections
1. Remove the four cover retaining screws at each corner of the transmitter cover in order to gain access to the trans-
mitter Wiring Terminal Block on the main circuit board shown in Figure 9.
2. Remove cover from the transmitter enclosure. Observe the following precautions when wiring the transmitter:
CAUTION
To prevent damage to the GF-A2100/GF-A2200, deactivate 24 VAC power source until all
connections to the instrument are complete.
The 24 VAC input ground (GND) connection at terminal 6 is shared with the Analog/PID Output
signal grounds at terminal 2. If an isolated output is required, a dedicated isolation transformer
must be provided to power the GF-A2100/GF-A2200.
The GF-A2100/GF-A2200 is a non-isolated device with a half-wave rectifier on the 24VAC power
input terminal at pin 7. Therefore, to prevent equipment damage, multiple devices that are
powered by a common 24VAC transformer output must use common device connections (e.g. pin 6
{ground} to other device ground, and pin 7 {24VAC power} to other device power), or independent
isolation transformers must be provided for each non-isolated device.
The GF-A2100/GF-A2200 24VAC ground and Analog/PID Output signal returns are common.
Therefore it is recommended that the Analog/PID Outputs to the BAS control interface be connected
using two separate twisted shielded pair in order to eliminate potential voltage drop on the common
(from the 24VAC return) that would otherwise cause inaccurate readings.
3. Connect 24 VAC power to terminal 7, and the 24V ground at terminal 6 of the wiring terminal block as shown in
Figures 9 and 10, observing the previous wiring precautions.
Analog/PID Output Connections
The GF-A2100/GF-A2200 provides two Analog/PID Outputs that can be configured as 0-10VDC, 0-5VDC or 2-10VDC and
are capable of driving loads of up to 20mA (maximum). The 24VAC return ground connection is shared with the
Analog/PID Output signal grounds (GND). If the Analog/PID Outputs must be isolated from the 24VAC return, a dedicat-
ed isolation transformer must be provided to power the GF-A2100/GF-A2200.
4. Connect OUT1 Analog/PID Output signal wire at terminal 1, and the signal ground at terminal 2 as shown in
Figures 9 and 10 while observing the previous wiring precautions.
5. Connect OUT2 Analog/PID Output signal wire at terminal 3, and the signal ground at terminal 2 as shown in
Figures 9 and 10 while observing the previous wiring precautions.
Form a “drip loop” with the the sensor probe cable at the transmitter if there is a potential for water runoff or condensation.

Automation, Inc.
™
14
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Alarm Output Connections
The GF-A2100/GF-A2200 provides an alarm output that can be configured as relay dry contacts, or as direct drive (15
mA typical) for an external LED alarm indicator. The alarm output interface is set using the LED PWR jumper on the main
circuit board as shown in Figure 9. With the LED PWR jumper on, the alarm output is set to provide an external LED drive
(15 mA typical) at terminal 4, with ground return at terminal 6. With the LED PWR jumper OFF, the alarm output is set
to provide relay dry contacts between terminals 4 and 5 (contacts rated at 30VDC/24VAC 3 amps maximum). The Alarm
can be set as contacts close or contacts open on alarm as detailed in the Transmitter Setup menu later in this manual.
For external LED drive alarm output, ensure that the LED PWR jumper is installed, and connect the LED anode (+)
to terminal 4, and cathode (-) at terminal 6.
OR
For relay dry contact alarm output, ensure that the LED PWR jumper is removed, and connect the alarm wires to
terminals 4 and 5. Contact rating is 30VDC/24VAC 3 amps maximum.
Sensor Probe Connection
With 24VAC power OFF, connect each sensor probe cable plug to the transmitter by pushing it into the keyed cir-
cular receptacle (shown below) located at the bottom of the transmitter enclosure. Do not twist the connector.
Sensor probe cable plugs are “keyed”. Line up the connector plug with the transmitter receptacle and push straight on. DO NOT
TWIST. Squeeze cable plug “ribs” towards receptacle when removing. Forcing the cable plug in or out of the receptacle will dam-
age the connectors and void warranty.
Sensor probe must be connected to the transmitter before application of 24VAC power in order to properly “flash” sensor calibra-
tion data to the transmitter.
Initial Power Up
Upon application of 24VAC power, the GF-A2100/GF-A2200 will initiate a brief self-test, indicated by dashed lines on the
LCD, and then will automatically engage the Start Up Menu to prompt the user through menus that configure the trans-
mitter for the specific installation/application. The Start Up menu will also be engaged each time power is applied and
the required area for any of the connected probes has not been set (*AR1(and/or AR2)=0.00 SQF). Refer to the Start
Up Menu and Set Up menu details and descriptions later in this manual for a complete description of programming
options and features.
Operating Modes
The GF-A2100/GF-A2200 provides two independent 12-bit (4096 discrete states) linear analog outputs. Each output
can be independently enabled, disabled and configured within the Set Up Menu as follows:
Set as Standard flow or Temperature output from Flow 1 (and Flow 2) probes.
Set as a PID Control output signal (with advanced PID control options available)
Set as an airflow alarm status output (to indicate Hi limit, Low limit or Deadband with hysteresis conditions)
Set as a temperature alarm output (to indicate Hi limit, Low limit or Deadband with hysteresis conditions)
Set as Differential flow output to indicate the difference between Flow 1 and Flow 2 probes (GF-A2200 only)
In addition, the text displayed for each output on the GF-A2100/GF-A2200 LCD display panel can be renamed to suit your
specific requirements (5 characters max). Analog outputs are field selectable for 0-10VDC, 0-5VDC or 2-10VDC to per-
mit simple integration with virtually all building automation systems. Refer to the Set up menu details and descriptions
later in this manual for a complete description of analog output and PID control output options.
Push/Pull to Connect/Disconnect
DO NOT TWIST!
Keyway

TRANSFORMER
24 VAC / 50-60 HZ
(SEE NOTES 2 AND 3)
NOTES:
1: CONNECT OUTPUT SIGNAL CABLE DRAINS TO EARTH GROUND AT ONE END OF CABLE ONLY.
2. GF-A2100 AND GF-A2200 ARE NON-ISOLATED DEVICES USING A HALF-WAVE RECTIFIER ON THE 24VAC POWER INPUT. IF MULTIPLE DEVICES ARE POWERED BY THE SAME TRANSFORMER
OUTPUT, ALL GND CONNECTIONS MUST BE COMMON, OR AN ISOLATION TRANSFORMER MAY BE USED TO PREVENT EQUIPMENT DAMAGE.
3. ALL DEVICES ON MULTIPLE GF-A2200/GF-A2200 INSTALLATIONS WITH A COMMON POWER 24VAC SOURCE MUST BE WIRED IN-PHASE TO THE SAME TERMINALS (e.g.: PIN 6 to PIN 6, PIN 7 to PIN 7).
4. SHIELDED TWISTED PAIR (STP) WIRING (SUPPLIED BY OTHERS) IS RECOMMENDED.
5. OUT1 AND OUT2 TYPE CAN EACH BE SELECTED AS EITHER AN ANALOG OUTPUT (TYPE=ALARM;FLOW;TEMP;DIFF FLOW) OR AS A PID CONTROL OUTPUT (TYPE=CTRL) - SEE SETUP MENU DETAIL.
6. DASHED LINES INDICATE ALTERNATE SHIELDED TWISTED PAIR WIRING CONNECTIONS FOR PID CONTROL DEVICES.
24VAC
LINE
IN
24
VAC
OUT
TO S-110
AIRFLOW
SENSOR
PROBE(S)
LED PWR
JUMPER REMOVED
1: OUT 1: CTRL/ALARM/FLOW/
TEMP/DIFF
2: ANALOG/PID OUT GROUND
3: OUT 2: CTRL/ALARM/FLOW/
TEMP/DIFF
4: ALARM RELAY DRY CONTACT
5: ALARM RELAY COMMON
6: 24V GROUND
7: 24VAC POWER IN
1 2 3 4 5 6 7
LED
PWR
JUMPER
LED PWR
JUMPER INSTALLED
1: OUT 1: CTRL/ALARM/FLOW/
TEMP/DIFF
2: ANALOG/PID OUT GROUND
3: OUT 2: CTRL/ALARM/FLOW/
TEMP/DIFF
4: ALARM LED (+15mA TYP)
5: NO CONNECTION
6: 24V GROUND
7: 24VAC POWER IN
PROBE 1 (ALL MODELS)
PROBE 2 (GF-A2200 ONLY)
CONTROL DEVICE
PID CONTROL OUTPUT 1 - ANALOG OUT COM GROUND (FROM PIN 2 – SEE NOTES 2, 3)
+ OUT 1 (FROM PIN 1)
+ PID CONTROL 1 (FROM PIN 1)
RELAY ALARM
DRY
RELAY DRY CONTACTS
30VDC/24VAC @ 3 AMPS MAX)
ALARM RELAY DRY CONTACT (VALID ONLY WHEN LED PWR JUMPER IS REMOVED)
COM
EXTERNAL LED ALARM INDICATOR
EXTERNAL ALARM LED (15 mA)
ILLUMINATES ON ALARM
(LED PWR JUMPER INSTALLED)
ALARM LED SIGNAL +15 mA (VALID ONLY WHEN LED PWR JUMPER IS INSTALLED)
PROBE
1
PROBE
2
BAS
INTERFACE
- OUT COM GROUND (FROM PIN 2 – SEE NOTES 2, 3)
GROUND
(LED PWR JUMPER REMOVED)
ALARM LED GROUND (VALID ONLY WHEN LED PWR JUMPER IS INSTALLED)
ALARM RELAY COMMON (VALID ONLY WHEN LED PWR JUMPER IS REMOVED)
+ OUT 2 (FROM PIN 3)
- OUT COM GROUND (FROM PIN 2 – SEE NOTES 2, 3)
*TYPE=ALARM OUTnPROVIDES ALARM STATUS SET BY ALR SRC= AND ALR TYP=
*TYPE=FLOWnOUTnINDICATES PROBE nFLOW
*TYPE=TEMPnOUTnINDICATES PROBE nTEMPERATURE
*TYPE=DIFF OUTnINDICATES FLOW DIFFERENCE BETWEEN PROBES 1 and 2)
n=1OR 2AS SELECTED IN SETUP MENU FOR OUT1 or OUT2 OPTIONS
- ANALOG OUT COM GROUND (FROM PIN 2)
+ PID CONTROL 2 (FROM PIN 3)
PID CONTROL OUTPUT 2
T-2000 TRANSMITTER
*TYPE=CTRL SETS OUTnAS A PID CONTROL OUTPUT (SEE SETUP MENU)
SEE NOTE 5 FOR ANALOG OUTPUT OPTIONS
SEE NOTE 5 FOR PID CONTROL OUTPUT OPTIONS
Figure 9. GF-A2100/GF-A2200 Main Circuit Board Detail
Automation, Inc.
™
TM_GF-A2100_2200_R1A
15
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Figure 10. GF-A2100/GF-A2200 Wiring Diagram Detail
1 234567
ESC UP DN ENTER
ACT
LED
LED
PWR
ACT LED
(Green 1 second flash normal;
2 second flash for fault).
LCD Contrast Adjust
LCD Display Panel
Pushbutton User Interface
for Simple Field Set Up
(ESCAPE UP DOWN ENTER)
Probe Connectors
LED PWR JUMPER
ON = External LED Alarm Output
OFF = Relay Dry Contacts
Wiring Terminal Block

Automation, Inc.
™
16
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Alarm Interface, Options and Descriptions
The programmable alarm permits user selection of the alarm interface, alarm source and alarm type as follows:
Alarm Interface (LED PWR Jumper)
The alarm interface can be configured as relay dry contacts (30VDC/24VAC 3 amp maximum either N.O. or N.C.) or as
direct LED drive output (15 mA typical) using the LED PWR jumper on the transmitter circuit board shown in Figure 9.
Alarm Source (ALR SRC=)
The alarm source can be programmed within the Setup menu to monitor Probe 1 or Probe 2 airflow (A
ALR SRC=FLOW
),
temperature (A
ALR SRC=TEMP
), or the difference in flow between Probes 1 and 2 (A
ALR SRC=DIFF
). It can also be set to
monitor the overall health/status of the transmitter and probe (A
ALR SRC=TRBL
)to activate an alarm in the event of a fault
detected in the sensor or transmitter.
Alarm Type (ALR TYP=)
The alarm type can be set to monitor airflow or temperature and activate an alarm when airflow or temperature are above
a preset High Limit value (A
ALR TYP=HI
), below a preset Low Limit value (A
ALR TYP=LO
), or outside of a preset Deadband
operating range (A
ALR TYP=DEADB
). The alarm hysteresis (A
ALRM HYS=
) value is used to establish a range as a percent-
age above and below the alarm setpoint value.
The following alarm types are available in the Setup menu (refer to Setup Menu detail later in this document):
ALR TYP=DEADB
Sets alarm as Deadband type, where measurement outside of a range defined by the
setpoint value (A
ASP=
) plus or minus the hysteresis (A
ALRM HYS=
) value causes alarm
activation. The alarm is reset when the measured value returns within this range.
ALR TYP=HI
Sets alarm as a Hi Limit type, where measurement above the A
ASP=
value causes alarm
activation. The alarm is reset when measurement decreases below the A
ASP=
value minus
the A
ALRM HYS=
value.
ALR TYP=LO
Sets alarm as a Low Limit type, where measurement below the A
ASP=
value causes alarm
activation. The alarm is reset when measurement increases above the A
ASP=
value plus
the A
ALRM HYS=
value.
ASP=
(value) Sets the alarm setpoint measurement value that establishes alarm activity in conjunction
with the other alarm options.
ALRM HYS=
(value) Sets the alarm range expressed as a percentage of the A
ASP=
value.
For A
ALR TYP=DEADB
, measured values outside of this range will trigger the alarm.
For A
ALR TYP=HI
(and L
LO
), the A
ALRM HYS=
value sets the range above or below the A
ASP=
value where the alarm remains active once triggered.
ADEL=
(value) Sets the delay period (in seconds) that the alarm condition must exist before the alarm
output is activated.
ALRM POL=
(value) Sets the relay dry contact configuration at terminals 4 and 5; For A
ALRM POL=NO
, contacts
are normally open and close on alarm; For A
ALRM POL=NC
contacts are normally closed and
open on alarm.
The accuracy of the GF-A2100/GF-A2200 is “percent of reading”, and is therefore not dependent on the full scale out-
put range selected. However, if desired, the factory default full scale output range setting can be reconfigured in the field
(see: CHANGING FACTORY DEFAULT SETTINGS).

Automation, Inc.
™
TM_GF-A2100_2200_R1A
17
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Table 1. GF-A2100/GF-A2200 Analog Output Flow and Temperature Conversion
Converting Analog Output Signal Values for Airflow and Temperature
The GF-A2100/GF-A2200 analog outputs can be configured to display individual air flow, differential air flow, velocity or
temperature. Units are selected in the System of Units menu for SI or IP units of measure. Table 1 shows analog out-
put scaling and conversions for airflow, volumetric flow and temperature. For example, when the transmitter is set for
normal airflow (CFM/LPS) and AR1/AR2 area is set to 1 square foot (A
AR1/AR2=1.00 SQF
), the LCD display and the ana-
log output will both indicate equivalent airflow velocity in FPM. Note that for Differential airflow measurement, zero flow
is indicated at 1/2 of the output range selected in order to permit positive and negative relative flow values.
Flow Rate 1
(CFM/LPS) Analog Output x FS x 0.1 Analog Output x FS x 0.2 (Analog Output - 2) x FS x 0.125
Differential
Flow Rate 2
(CFM/LPS)
(Analog Output - 5) x FS x 0.2 (Analog Output - 2.5) x FS x 0.4 (Analog Output - 6) x FS x 0.25
Analog Output x FS x 0.1 Analog Output x FS x 0.2 (Analog Output - 2) x FS x 0.125
Area (SQF) Area (SQF) Area (SQF)
Analog Output x FS x 1000 x 0.1 Analog Output x FS x 1000 x 0.2 (Analog Output - 2) x FS x 1000 x 0.125
Area (SQM) Area (SQM) Area (SQM)
Temp 3
(°F,°C) [{Analog Output x (FS - MS)} x 0.1] + MS [{Analog Output x (FS - MS)} x 0.2] + MS [(Analog Output - 2) x {(FS - MS) x 0.125}] + MS
NOTES:
1. Setup menu for flow measurement (OUT TYPE=FLOW).
2. Setup menu for temperature measurement (OUT TYPE=DIFF).
4. FS is the full scale analog output value in the Setup Menu (FS= ____ ).
5. MS is the minimum scale analog output value in the Setup Menu (MS= ____ ).
Velocity 1
(MPS)
Velocity 1
(FPM)
3. Setup menu for temperature measurement (OUT TYPE=TEMP).
ANALOG OUTPUT SCALING CONVERSION FORMULAE
CONVERT
ANALOG
OUTPUT TO 0-10 VDC 2-10 VDC0-5 VDC
Sending a Test Output Signal to the Host Control System
A test output signal between 0 and 100% of the selected full scale output (0-10 VDC, 0-5VDC or 2-10 VDC) can be pro-
vided by the GF-A2100/GF-A2200 to verify proper conversion of the output signals from the transmitter at the host con-
trol system. To set a fixed output signal for airflow and temperature, enter the Initialization Menu (Figure 12) and navi-
gate to the “*
*TESTOUT=0%
” menu item. Press the “ENTER” button, and then use the “UP” and “DOWN” arrow buttons
to select an output between 0 and 100% of the full scale value. Press the “ENTER” button to set the output percentage.
The GF-A2100/GF-A2200 will now provide the selected analog output value. To cancel the Test output, press the “ESC”
button to return to normal operation.
GF-A2100/GF-A2200 TRANSMITTER SET UP
General
To ensure successful start-up, verify that the airflow measuring station transmitter and probe are installed in accordance
with recommended installation and placement guidelines.
Activate 24VAC power to the instrument. The transmitter executes a complete self-check (that takes approxi-
mately 10 seconds) each time power is applied. Verify that the readings at the host control system return an output that
matches the output of the GF-A2100/GF-A2200.
Check the physical installation, power connections and wiring prior to application of power to the instrument.

Automation, Inc.
™
18
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Figure 11. Transmitter Start Up Menu
Start Up Menu
At the initial (first) power up following self-test, and at each start up when an area value has not been input (when AR1=0
and/or AR2=0), the GF-A2100/GF-A2200 transmitter will guide the user through a series of prompts for system config-
uration. Figure 11 shows the Initial Start Up Menu. The user will enter the type of airflow measurement configuration
(either averaged reading for single or dual probe models; or independent readings for dual probe models) and the free
area measurement where probes are located.
Additional field configurable options are available within the transmitter Initialization Menu and within the Set Up menus
as detailed in the following paragraphs.
Start Menu
The Start Menu is active only on the initial instrument
startup, and whenever area is not set ( AR1=0.00 ).
Flow readings from individual probes are averaged.
SYS CFG=AVG ÈEnter Sys Cfg
Flow readings of probes are output separately.
Area measurement for Probe 1 location.
SYS CFG=AVG È
SYS CFG=DUAL Ç
Enter Sys Cfg
Enter Area 1 AR1= 0.00 Ç
Area 2 menu only active when system is configured as dual.
Area measurement for Probe 2 location
(Use only with two-probe Model GF-2200-A).
Enter Area 2 AR2= 0.00 Ç

Automation, Inc.
™
TM_GF-A2100_2200_R1A
19
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Transmitter Initialization Menu
The GF-A2100/GF-A2200 transmitter automatically initializes at power-up and conducts a self test with full system diag-
nostics. Under normal conditions, it is not necessary to enter the Initialization Menu, however the Initialization Menu can
be engaged if one of the menu items shown in Figure 12 requires change. To engage the Initialization Menu, simultane-
ously depress and release the “ENTER” and “ESC” buttons during the first 10 seconds after transmitter power-up delay
is completed (indicated by “- - - - - - - -”). Alternatively, you may enter the Initialization Menu after power up by simultane-
ously depressing and
holding
the “ENTER” and “ESC” buttons for 5 seconds - and then releasing them. Navigate through
the menu as shown in Figure 12.
During Power-Up (approximately 10 seconds), simultaneously depress and then release ESC/ENTER keys to select,
OR
During normal operation, simultaneously depress and hold the ESC/ENTER keys for 5 seconds to select.
* Factory Default/Current Setting
Enter (move →) Enter (move →) Enter (move →) Enter (action, move ←←)
Esc (normal oper.) Esc (move ←) Esc (move ←) Esc (move ←←)
A
CTION
Custom LCD Flow Text: Blinking prompt shows position of the selected
character. Up and down arrows select between available characters.
ENTER accepts current character selection and moves cursor forward
(right); ESC moves the cursor back (left). You must enter 5 characters.
Use space characters for text shorter than 5 characters. TEXT2 option is
only available when SYS CFG=DUAL. Pressing ESC on the first input will
cancel input selection.
Enter the length of extension cable(s) if they have been added.
Important: For GF-2200-A, equal length extension cables must be
connected to both sensor probes for proper operation!
DISPLAY=OFF ↑Display model number only (no data).
LCD TRB=OFF ↑No LCD trouble indication. LED flash indicator on circuit board remains
enabled at all times.
Sets both output signals from 0-100% of configured output span.
LCD TRB=ON ↓
LCD indicates trouble using lower case last digit of airflow units (e.g. CFm).
When Field Cal Wizard is engaged, last character only is upper case (e.g.
cfM).
TESTOUT=0% ↑
YES ↓Clears existing sensor data from connected sensor probe(s).
*DISPLAY=ON ĽSET DISPLAY? DISPLAY=ON ↓Display measurement data according to transmitter configuration.
NO ↑No action.
RESET SENSORS ĽARE YOU SURE?
Reset transmitter to initial "Factory Default Settings".
T-2000 INIT 1.04 RESET ALL ↓
No action.
ARE YOU SURE?
*EXCABLE=0FT Ľ
YES ↓
NO ↑
SET CABLE EXT? EXCABLE=0FT Ľ
TEXT1= _ ↑
*TEXT2=FLOW2 ĽSET TEXT2? TEXT2= _ ↑
*LCD TRB=ON ĽSET LCD TRB?
*TESTOUT=0% ĽSET TESTOUT?
*TEXT1=FLOW1 ĽSET TEXT1?
Figure 12. Transmitter Initialization Menu

Automation, Inc.
™
20
TM_GF-A2100_2200_R1A
GF-A2100 AND GF-A2200 AIRFLOW MEASUREMENT STATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet: GreenTrol.com
Press and release ↑/↓during normal operation to select
* Factory Default/Current Setting
Enter (move →) Enter (move →) Enter (move →) Enter (action, move ←←)
Esc (normal oper.) Esc (move ←) Esc (move ←) Esc (move ←←)
ACTION
Sets s
y
stem units to inch-pound s
y
stem of units
(
CFM, sq.ft, ºF
)
SET SYSTEM?
SYSTEM SETUP ↓*IP/SI=IP SYS IP/SI=IP SYS ↓
Sets s
y
stem units to International S
y
stem of units
(
LPS, sq.M., ºC
)
ADDITIONAL SETUP ITEMS
(SEE SETUP MENU FOR DETAIL)
ADDITIONAL SETUP ITEMS
(SEE SETUP MENU FOR DETAIL)
IP/SI=SI SYS ↑
Figure 13. System of Units Menu
Table 2. Standard “IP” and “SI” Menu System of Units Abbreviations
“I
IP
” System of Units Description “S
SI
” System of Units Description
LCD Display LCD Display
FPM Feet per minute MPS Meters per second
CFM Cubic feet per minute LPS Liters per second
SQF Square feet SQM Square meters
F Fahrenheit C Celsius
Changing the System of Units
The GF-A2100/GF-A2200 transmitter is shipped with the system of units set to US inch-pound units (IP), and will display
units of measure as shown in the IP column of Table 2. To change to standard international (SI) units, simultaneously
press and release the “UP” and “DOWN” arrow pushbuttons during normal operation to enter the SETUP menu. Then,
using the ENTER button, navigate into the SYSTEM SETUP menu to the System of Units sub-menu as shown in Figure 13.
Press "ENTER" to proceed to the right (three times), and then use the "UP" and "DOWN" arrow buttons to select the sys-
tem of units desired. Press the “ENTER” button to save the changes, and then press “ESC” twice to move left and return
to normal operating mode. Note that all Menu illustrations are shown in IP System Of Units. When SI System of Units is
selected, the menu units of measure abbreviations change as shown in the SI column of Table 2.
Factory Default Settings
The GF-A2100/GF-A2200 transmitter is “plug and play” and does not require additional setup unless an optional feature
is selected that requires configuration. Table 3 shows the factory default settings for the GF-A2100/GF-A2200. To
change the Factory Default Settings, see CHANGING FACTORY DEFAULT SETTINGS section in this document.
GF-A2100/GF-A2200 LCD Display Notifications and Features
Following a brief initialization at power up, the LCD will automatically display airflow and temperature as all upper case
(caps) characters. The LCD display provides additional information on system status and alarm conditions as follows:
LCD Scrolling Control Feature (SYS CFG=DUAL)
When the GF-A2200 is configured for two probes (SYS CFG= DUAL), the LCD display will scroll to indicate the readings
for each probe. To stop the scrolling, simply depress either the “ENTER” or “ESC” keys. In this mode with scrolling
stopped, the LCD will display an asterisk (*
*
) as the right most character, and depressing the “UP” or “DOWN” key will per-
mit you to cycle and hold the display at each individual reading.