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AQS51/61-KAM  COMBINED CO

2

-/TEMPERATURE DUCT SENSOR/CONTROLLER

7

EN0B-1023 GE02R0700

START UP

After connected to a 24Vac power supply, the unit is ready

for operation.
1. Select on the AQS61-KAM the needed display indication

by short-circuiting the MENU zigzag trace with a

screwdriver, default setting is ppm and 

°

C alternating.

If operational parameters different from from the standard

values like converting range or special ventilation

strategies are required, use a PC and the Service Software

AQS-USP22 for this purpose.

2. Using the ABC-function, recalibration of the unit is required

only after 5 years of operation.

OPERATION MODE AQS61-KAM

This sensor has two zigzag traces, MENU and ENTER, on

the printed circuit board (see Fig. 4), which are only

accessible after removing the cover.
The zigzag trace MENU is available for selection of the

indicated value. The function is as follows:

Zigzag Trace

Function/Remarks

MENU

Display selector –

Short-circuiting of the MENU zigzag

trace toggles between the following

indication sequence (rotation principle):
1. 

°

C and ppm alternating

2. Error code
3. CO

2

 - concentration in ppm

4. Temperature in 

°

C

5. OUT1 value % full scale
6. OUT2 value % full scale

To access the maintenance level short at level 5.(OUT1

value) ENTER-MENU- ENTER in sequence. The

maintenance mode is restricted to competent trained service

personnel only. For detailed information see the Service &

Checkout Instruction EN2B-0461GE02.

LED - Signals

The standard sensor has two different LED’s, yellow and red

located below the semi-transparent LCD display. The LED’s

indicate the status of the device as shown in the table below.

LED

Function/Remarks

yellow

Maintenance LED -

Steady ON in cases, if an error flag is set. On

the AQS61-KAM this is indicated in addition on

the display by a wrench icon.

By connecting a PC to the serial port or

selection of the error code display mode on the

AQS61-KAM the source of the problem can be

defined (see error code list).

red

Relay Status LED -

Steady ON, if relay is activated (contact

CM-NC open, CM-NO closed).

If the relay output is not used for any control

purpose, its trigger point can be programmed

for other tasks, e. g. indication by the red LED

of dangerous gas level has been reached.

Another option is to indicate that the analog

output control range has been exceeded, any

or both outputs have reached 100% output

value.

Содержание AQS51-KAM

Страница 1: ...s analog output configuration the software program STRATEGY is available which is part of the User Interface Program Software package AQS USP22 used for re calibration change of the measurement range or other service or set up purposes The switching setpoint and differential of the relay output for CO2 limit monitoring or plant system ON OFF control can be adjusted within the measurement range Thi...

Страница 2: ...D indication Yellow Maintenance required Red Relay activated Power up time 1 min Ambient operating limits Temperature 0 50 C General Humidity 0 95 rh non condensing Operating principle Non dispersive infrared NDIR Gas sampling mode Diffusion and 3 mm gas inlet push on barb Response time 2 min diffusion or 10 sec 0 2 ltr min gas flow Measurement range 0 3000 ppm Converting range 0 2000 ppm 0 10 Vdc...

Страница 3: ...using the PC software STRATEGY Version 3 Digital relay output Single pole double throw SPDT switching potential free contact Factory adjusted switching setpoint and differential 1A 50 Vac 50VA or 1 A 24 Vdc 30 W Relay activated 1000 ppm Relay deactivated 900 ppm Sensor housing 84 x 142 x 46 mm Dimensions Sampling probe 203 mm Zigzag traces accessible after removing the cover Shortage with a screwd...

Страница 4: ...ions to provide different ventilation control strategies All sensor measurements can be addressed to these functions and mixed together by this software to form two independent and intelligent P I controllers The relay output contact CM NO is closed if the CO2 level exceeds the factory adjusted limit of 1000ppm and the contact CM NC is closed if the CO2 level is equal or below 900ppm These paramet...

Страница 5: ...Pos 7 cable entry bushings To make a hole insert a screwdriver into the groove and hit firmly Mount for each cable a cable entry bushing into the aspiration box and seal properly 7 Mounting the aspiration box to the sampling probe is performed by a snap in bayonet fitting Pos 10 Insert first the temperature sensor placed on the end of a 150mm long soldered on lead Fig 3 Pos 2 into the air inlet to...

Страница 6: ...G0 permitting a 3 wire configuration A single transformer may be used for the entire system Situations can occur where different transformers must be used NOTE2 AQS51 61 can supply both a voltage or a current output for OUT1 OUT2 To change between voltage and current output mode the hardware jumpers have to be set in accordance There is one jumper for AN1 and one for AN2 so that one output can be ...

Страница 7: ...2 Error code 3 CO2 concentration in ppm 4 Temperature in C 5 OUT1 value full scale 6 OUT2 value full scale To access the maintenance level short at level 5 OUT1 value ENTER MENU ENTER in sequence The maintenance mode is restricted to competent trained service personnel only For detailed information see the Service Checkout Instruction EN2B 0461GE02 LED Signals The standard sensor has two different...

Страница 8: ...sor probes are checked against failure by checking the valid dynamic measurement ranges Error Code and Actions Error Code Suggested Action 4 Indicate problems with the power supply Check power supply voltage 8 Indicates problem with OUT1 Could be too high an output load connected to the output Check OUT1 with a voltmeter and compare the output with the LCD reading for AQS61 KAM Disconnect the outp...

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