Critical Environment Technologies AST-IS1 User manual

Critical Environment Technologies
Canada Inc.
www.critical-environment.com
Installation Manual for
AST-IS1 & AST-IS2
Infrared CO2Transmitter for Wall (Office) Mount
#145, 7391 VANTAGE WAY
DELTA, BC CANADA V4G 1M3
PH: 604-940-8741 TOLL FREE: 877-940-8741
MANUAL REVISION-A, August 2017

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IMPORTANT NOTE
Read and understand this manual prior to using this instrument. Carefully read the war-
ranty policy, service policy, notices, disclaimers and revisions on the following pages.
This product must be installed by a qualified electrician or factory trained technician and
according to instructions indicated in this manual. This instrument should be inspected
and calibrated regularly by a qualified and trained technician.
This instrument has not been designed to be intrinsically safe. For your safety, do not
use it in classified hazardous areas (explosion-rated environments).
INSTRUMENT SERIAL NUMBER:
__________________________________________________________
PURCHASE DATE:
__________________________________________________________
PURCHASED FROM:
__________________________________________________________
WARRANTY POLICY
Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manu-
facturer, warrants this instrument, (excluding sensors, battery packs, batteries, pumps
and filters) to be free from defects in materials and workmanship for a period of two
years from the date of purchase from our facility. The sensors have a warranty
period of one year on a pro-rated basis from the date of purchase from our facility.
If the product should become defective within this warranty
period, we will repair or replace it at our discretion.
The warranty status may be affected if the instrument has not been used and main-
tained as per the instructions in this manual or has been abused, damaged, or modified
in any way. This instrument is only to be used for purposes stated herein. The manufac-
turer is not liable for auxiliary interfaced equipment or consequential damage.
Due to ongoing research, development, and product testing, the manufacturer reserves
the right to change specifications without notice. The information contained herein is
based on data considered accurate. However, no warranty is expressed or implied re-
garding the accuracy of this data.
All goods must be shipped to the manufacturer by prepaid freight. All returned goods
must be pre-authorized by obtaining a Returned Merchandise Authorization (RMA)
number. Contact the manufacturer for a number and procedures required for product
transport.

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SERVICE POLICY
CETCI maintains an instrument service facility at the factory. Some CETCI distributors /
agents may also have repair facilities; however, CETCI assumes no liability for service
performed by anyone other than CETCI personnel.
Repairs are warranted for 90 days after date of shipment (sensors have individual war-
ranties).
Should your instrument require non-warranty repair, you may contact the distributor from
whom it was purchased or you may contact CETCI directly.
Prior to shipping equipment to CETCI, contact our office for an Returned Merchandise
Authorization (RMA) number. All returned goods must be accompanied with an RMA
number.
If CETCI is to do the repair work, you may send the instrument, prepaid, to:
Attention: Service Department
Critical Environment Technologies Canada Inc.
Unit 145, 7391 Vantage Way
Delta, BC, V4G 1M3
Always include your RMA number, address, telephone number, contact name, shipping /
billing information, and a description of the defect as you perceive it. You will be contact-
ed with a cost estimate for expected repairs, prior to the performance of any service
work.
For liability reasons, CETCI has a policy of performing all needed repairs to restore the
instrument to full operating condition.
Pack the equipment well (in its original packing if possible), as we cannot be held re-
sponsible for any damage incurred during shipping to our facility.
COPYRIGHTS
This manual is subject to copyright protection; all rights are reserved. Under internation-
al and domestic copyright laws, this manual may not be copied or translated, in whole or
in part, in any manner or format, without the written permission of CETCI.
All software which CETCI utilizes and / or distributes holds a proprietary interest and is
also subject to copyright protection and all rights are reserved. No party may use or
copy such software in any manner or format, except to the extent that CETCI grants
them a license to do so. IF SOFTWARE IS BEING LOADED ONTO MORE THAN ONE
COMPUTER, EXTRA SOFTWARE LICENSES MUST BE PURCHASED.
DISCLAIMER
Under no circumstances will CETCI be liable for any claims, losses or damages result-
ing from or arising out of the repair or modification of this equipment by a party other
than CETCI service technicians, or by operation or use of the equipment other than in

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accordance with the printed instructions contained within this manual or if the equipment
has been improperly maintained or subjected to neglect or accident. Any of the forego-
ing will void the warranty.
Under most local electrical codes, low voltage wires cannot be run within the same con-
duit as line voltage wires. It is CETCI policy that all wiring of our products meet this re-
quirement.
It is CETCI policy that all wiring be within properly grounded (earth or safety) conduit.
REVISIONS
This manual was written and published by CETCI. The manufacturer makes no warranty
or representation, expressed or implied including any warranty of merchantability or
fitness for purpose, with respect to this manual.
All information contained in this manual is believed to be true and accurate at the time of
printing. However, as part of its continuing efforts to improve its products and their docu-
mentation, the manufacturer reserves the right to make changes at any time without
notice. Revised copies of this manual can be obtained by contacting CETCI or visiting
www.critical-environment.com
Should you detect any error or omission in this manual, please contact CETCI at the
following address:
Critical Environment Technologies Canada Inc.
Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada
Toll Free: +1.877.940.8741
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Website: www.critical-environment.com
In no event will CETCI, its officers or employees be liable for any direct, special, inci-
dental or consequential damages resulting from any defect in any manual, even if ad-
vised of the possibility of such damages.

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AST-IS1 (no display) & AST-IS2 (display)
The IAQ-sensor products AST-IS1 and AST-IS2 (sensor/transmitter for wall mounting)
are designed to measure carbon dioxide (CO2) in rooms. The model AST-IS2 incorpo-
rates an LCD digital display indicating the measured CO2value in ppm (parts-per-
million) real time.
These units are designed for connecting to a control system with 0-10V or 2-10V signal
inputs. The two parallel signal outputs OUT1 (0-10V) and OUT2 (2-10V or 4-20 mA) give
linear signal voltages or currents corresponding to the measuring range. The output
OUT2 also indicates the status by setting the output voltage to 1V or the output current
to 2 mA when the sensor self diagnostics detects any error.
To open the wall mounted housing
Closed housing seen from above. The housing is opened by pressing a screw driver on
the locking hook. The locking hook is then released.
AST-IS1 AST-IS2

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SPECIFICATIONS
This product is in accordance with the EMC 2004/108/EC, 92/31/EEG including amend-
ments by the CE-marking Directive 93/68/EEC
The product fulfils the following demands: EN 61000-4-2 level 2, EN 61000-4-3 level 2,
EN 61000-4-4 level 4, EN 61000-4-6, EN 61000-4-8 level 4, EN 55022 class B

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DIMENSIONS & HOLES
The dimensions of the sensor in mm and (inches)
Mounting of the sensor onto the wall
Please use screws with screw head diameter less than 7,5 mm (0,295 inches) and
screw head height less than 2,4 mm (0,094 inches)
ELECTRICAL CONNECTIONS
The power supply has to be connected to +~ and . is considered as
system ground.
PLEASE NOTE!
The same ground reference has to be used for the AST-IS1 and AST-IS2
transmitters and for the control system!

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ELECTRICAL CONNECTIONS
Terminal Function Electrical Data Remarks, Standard
Settings
+~ Power (+)
Power ground (-)
24VAC/DC+
(+/- 20%), 2W
24VAC/DC- System voltage
reference
OUT-1
OUT-2
Analog output-1 (+)
Analog output-2 (+)
0-10 VDC
0-10 or 2-10 VDC or
0-20 mA or 4-20 mA
0,9-1, 6 VDC or
1.5-2,5 mA
0 VDC or 0 mA
0-2000 ppm CO2
0-2000 ppm CO2
Status = Error
Status = Not Ready
Table-1: Connections of the main wiring terminal
PCB with jumper to configure OUT-2
for current output 4-20 mA or voltage PCB with mounted resistor OUT-2 is then configured for voltage output 2-10

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WIRING CONNECTION TERMINALS
Enlarged picture of the PCB with the jumper set to current output (left position)
Enlarged picture of the PCB with the jumper set to voltage output (right position)
MOUNTING SENSOR ONTO WALL
Please use screws with screw head diameter less than 7,5 mm (0,295 inches) and
screw head height less than 2,4 mm (0,094 inches)
SELF DIAGNOSTICS
The circuit contains complete self diagnostic procedures that are executed
automatically when the sensor is in operation. The yellow LED is lit if an error is found.
Sensors with display show a wrench if an error is found. The wrench is shown and the
yellow LED is lit during the first seconds after power up and if the measuring range is
exceeded. They are automatically turned off when the sensor returns to normal
operation. The output OUT2 indicates the same information by setting the output voltage
to 1V or 2 mA.
MAINTENANCE
The infrared sensor is basically maintenance free in normal environments thanks to the
built-in self-correcting ABC algorithm. Discuss your application with CETCI in order to
get advice for a proper calibration strategy.
PLEASE NOTE!
The sensor accuracy is defined at continuous operation (at least 3weeks after
installation)
PLEASE NOTE! Electronic products should be disposed of via a suitable
recycling centre.

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AST20170814-A-AST-IS1-IS2-Manual-Rev-A
Critical Environment Technologies Canada Inc.
Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada
Toll Free: +1.877.940.8741
Tel: [phone]
Fax: [phone]
www.critical-environment.com