Critical Environment Technologies AST-IS5 Manual de usuario

Critical Environment Technologies

Canada Inc.

www.critical-environment.com

Installation Manual for

AST

AST-

-IS5

IS5

Analog transmitters with Infrared CO2

& Temperature sensors with LCD display & relay

#145, 7391 VANTAGE WAY

DELTA, BC CANADA V4G 1M3

PH: 604-940-8741 TOLL FREE: 877-940-8741

MANUAL REVISION-C, AUGUST 18, 2010

AST-IS5

ANALOG TRANSMITTER

with

INFRARED CO2 SENSOR & TEMPERATURE SENSOR

and

LCD DIGITAL DISPLAY

This AST-IS series are reliable, long life analog transmitters. Life expectancy of the

infrared sensor is 15-years. The AST-IS5 is an advanced transmitter that has been

designed for use in the “climate zone”.

It provides an output for CO2 gas and an output for temperature. The local LCD

display provides real time values for the user. Standard measurement range is

0-2000 ppm.

SELF-DIAGNOSTICS

The system contains complete self diagnostic procedures. A full system test is

executed automatically every time the power is turned on. In addition, constantly

during operation, the sensors are checked against failure by checking the valid

dynamic measurement ranges. All EEPROM updates, initiated by the sensor itself

are checked by subsequent memory read back and data comparisons. These

different system checks return error bytes to the system RAM.

NOTE: The sensor accuracy is defined as continuous operation (at least 3-weeks

after installation).

FUNCTIONAL DESCRIPTION

OUT-1 = Measuring signal of CO2 concentration lowest value - highest value.

OUT-2 = Measuring signal of temperature lowest value - highest value.

OUT-3 = ON / OFF signal of demand of air quality

The opening of the relay is controlled by the hysteresis of the relay.

CO2 concentration

OUT-2 100%

Measuring

Signal

lowest value highest value

* The measuring signal of CO2

Measured temperature

OUT-2 100%

Measuring

Signal

lowest value highest value

* The measuring signal of temperature

Relay (ON / OFF)

Relay

Closed

Open

* The relay output

TERMINAL DEFAULT

OUTPUT DEFAULT

OUTPUT

RANGE

OUTPUTS OF

THIS SENSOR OUTPUT

RANGE OF

THIS SENSOR

OUT-1 4-20 mA 0-2000 ppm CO2

OUT-2 0-10 VDC 0-50 deg. C.

RELAY Closed

Open >1000 ppm CO2

<900 ppm CO2

DEFAULT OUTPUT CONFIGURATION FOR AST-IS5

Configuration Output Range Formula for Calculation

0-10 VDC 0-2000 ppm CO2

0-50 deg. C. CO2 value = Volt / 10 * 2000

Temperature value in C = Volt / 10 * 50

2-10 VDC 0-2000 ppm CO2

0-50 deg. C. CO2 value = (Volt-2) / 8 * 2000

Temperature value in C = (Volt-2) / 8 * 50

4-20 mA 0-2000 ppm CO2

0-50 deg. C. CO2 value = (nA-4) * 2000 / 16

Temperature value in C = (mA-4) * 50 / 16

a-b c-d Value = (reading-a) / (b-a) * (d-c) + c

a = lowest value of the configuration

b = highest value of the configuration

c = lowest value of the range

d = highest value of the range

FORMULAS FOR CALCULATING OUTPUT VALUES

NOTE: RED LED is lit when the relay output is closed.

OUTPUT CONFIGURATIONS

JUMPER POSITION FUNCTION

Start point

selection jumper 0%

20%

Jumper top position provides 0VDC or 0mA start point

for OUT-1, OUT-2 (0-20 mA or 0-10 VDC)

Jumper bottom position provides 2VDC or 4mA start

point for OUT-1, OUT-2 (4-20 mA or 2-10 VDC)

OUT-1 Current

Voltage

Connection in position “Current” provides 0/4-20 mA

output range for OUT-1

Connection in position “Voltage” provides 0/2-10 VDC

output range for OUT-1

OUT-2 Current

Voltage

Connection in position “Current” provides 0/4-20 mA

output range for OUT-2

Connection in position “Voltage” provides 0/2-10 VDC

output range for OUT-2

ITEM LOCATORS

1 top portion

2 lid

3 front portion

4 wall plate

5 screw

6 label with settings inside the top portion

DRAWING #1

INSTALLING THE TRANSMITTER

INSTALLING THE TRANSMITTER, CONT’D…..

REMOVE THE SECURING SCREW

FROM THE TOP PORTION, ITEM-5 IN

ITEM LOCATOR ON PREVIOUS PAGE

PULL THE TOP PORTION

UPWARD TO REMOVE IT

FOLD THE FRONT PORTION (ITEM-3,

DRAWING-1) WITH THE LID (ITEM-2,

DRTAWING-1), FORWARD AND

LOOSEN IT FROM THE HOOKS (ITEM-1,

DRAWING-4)

DRAWING #2

DRAWING #3

DRAWING #4

INSTALLING THE TRANSMITTER, CONT’D…..

SECURE THE WALL PLATE WITH

SCREWS. MAXIMUM SCREW HEAD DIAM-

TER SHOULD BE 7.5 mm. MAXIMUM

SCREW HEAD HEIGHT SHOULD BE 2.5

mm.

A - PUT THE TOP TABS OF THE FRONT PORTION INTO

THE TOP HOLES OF THE WALL PLATE.

B - PRESS THE LOWER EDGE OF THE CASE ONTO THE

WALL PLATE TO LATCH IN PLACE.

DRAWING #5

DRAWING #6

INSTALLING THE TRANSMITTER, CONT’D…..

THE TOP PORTION IS PUSHED UNDER

THE LOCKING HOOKS OF THE WALL

PLATE AND IS SECURED WITH A SCREW

DI1

TERMINALS & JUMPERS FOR AST-IS5:

THE TERMINALS & JUMPERS ARE LOCATED UNDER THE TOP PORTION.

THE DARKER AREAS ARE INDICATING THIS TRANSMITTER HAS BEEN SET FOR

VOLTAGE OUTPUT.

NOTE: IF FOR SOME REASON THE PCB

MUST BE REMOVED, HANDLE IT VERY

CAREFULLY ONLY BY THE EDGES TO

PROTECT IT FROM STATIC DISCHARGE

DAMAGE. NORMALLY REMOVING THE

PCB IS NOT REQUIRED.

DRAWING #7

DRAWING #8

WIRING TERMINALS & SIGNAL OUTPUT JUMPER SETTINGS

OUT-2

OUT-1

+ POWER 24VAC / DC+

POWER GROUND (-)

ANALOG OUT 0-10VDC(+)

ANALOG OUT 4-20 mA(+)

CURRENT OUTPUT JUMPER SET

VOLTAGE OUTPUT JUMPER SET

REFERENCE DRAWING #8 ON

PAGE-7 FOR MORE DETAILS.

M - SIGNAL GROUND (-)

PHOTO #1

OUTPUT - 3 RELAY - CLOSED - >1000 PPM

OUTPUT - 3 RELAY - OPEN - <900 PPM

NOTE: STANDARD

RANGE IS 0-2000 PPM

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