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Page  6

Only if 

Relay 

option Installed

Relay SP

1000 ppm

Relay Hy

50 ppm

Relay 

Dly 0min

Relay 

Test OFF

Relay SP

26 

°

C

Relay Hy

0.5 

°

C

The relay setpoint depends on the relay assignment set previously. Use <UP> 

or <DOWN> to change the setting within the limits as shown in the table. 

Note that only the one previous selection will be available. Note that a high 

alarm activates when the measurement exceeds the setpoint and a low alarm 

activates when the measurement goes below the setpoint. Use <MENU> to 

save and advance.

The Relay Hysteresis will depend on how the relay is assigned. Units will either 

be in ppm for CO

2

 or °C/°F for temperature.

Use <UP> or <DOWN> to change the Relay Hysteresis within the limits as 

shown in the table.

Note that a high alarm resets when the measurement goes below (setpoint 

- hysteresis) and a low alarm resets when the measurement goes above 

(se hysteresis). Note the value is somewhat dependent on the setpoint 

(ie: if the CO

2

 setpoint is 500 ppm then the hysteresis cannot be 500 ppm).

Use <UP> or <DOWN> to change the Relay Delay time within the limits. The 

delay time may be set from 0 to 9 minutes in 1 minute increments to prevent 

false alarms. The default is 0 minutes (no delay).

Use <UP> or <DOWN> to toggle the relay ON or OFF to test the relay 

operation. Press <MENU> to reset to OFF and advance.

or

or

12. RELAY SETPOINT

13. RELAY HYSTERESIS

14. RELAY DELAY

15. RELAY TEST

RELAY ASSIGNMENT

DEFAULT SETPOINT

SETPOINT RANGE

RESOLUTION

Temp High

26.0°C / 79.0°F

5.0 to 40.0°C / 40.0 to 100.0°F 0.5°

Temp Low

15.0°C / 59.0°F

5.0 to 40.0°C / 40.0 to 100.0°F 0.5°

CO

2

 High

1000 ppm

500 to 9000 ppm

100 ppm

CO

2

 Low

1000 ppm

500 to 9000 ppm

100 ppm

RELAY ASSIGNMENT

DEFAULT SETPOINT

SETPOINT RANGE

RESOLUTION

Temp High or Low

0.5°C/F

0.2 to 5.0°C/F

0.1°C/F

CO

2

 High or Low

50 ppm

25 to 500 ppm

25 ppm

<MENU> 

Press to advance to next menu item

<MENU> 

Press to advance to next menu item

<MENU> 

Press to advance to next menu item

<MENU> 

Press to advance to next menu item

<MENU> 

Press to advance to next menu item

Only if 

Relay

 option Installed

Relay

CO2

The Relay setting allows the relay alarm to be assigned to either CO

2

 High, 

CO

2

 Low, Temp Hi or Temp Low as applicable. Use <UP> or <DOWN> to select. 

Factory default is CO

2

 High. If the temperature sensor is not installed then the 

options will not be available.

11. RELAY

Copyright © Greystone Energy Systems, Inc.   All Rights Reserved    Phone:  +1 506 853 3057  Web: www.greystoneenergy.com

IN-GE-CD2RMCXXX-04

Summary of Contents for CD2RMC Series

Page 1: ...r conditioned spaces contact factory or other applications Do not exceed device ratings This product is not intended for life safety applications NOTE This CO2 sensor incorporates a Self Calibration feature to correct CO2 sensor drift This feature is recommended for applications where the CO2 will be exposed to fresh air 400 ppm at least one hour per day If the monitored space is occupied 24 hours...

Page 2: ...he enclosure and complete the wiring connection according to the wiring diagram Figure 6 This is a 3 wire sourcing device Connect the plus DC or the AC voltage hot side to the PWR terminal and the common is connected to the COM terminal The device is reverse voltage protected and will not operate if connected backwards It has a half wave power supply so the supply common is the same as the signal ...

Page 3: ...s required If the optional temperature sensor is installed the relay operation may be assigned to operate as a temperature high or low alarm instead of a CO2 alarm All the same relay parameters may be configured to set up the alarm as required SETPOINT MODE The optional setpoint control is operated by two front panel switches for UP and DOWN and the resistive output signal simulates a slidepot act...

Page 4: ... required Factory default is Direct MENU Press to advance to next menu item 5 OUTPUT SIGNAL DIRECTION When either the UP or DOWN keys are pressed the LCD temporarily changes to display the temperature setpoint value in C or F as set by Temp Units in the Setup Menu The display will show the previous temperature setpoint setting such as 22 ºC or 77 ºF If no other action is taken for 5 seconds then t...

Page 5: ...installed Factory default is C Display is used to control what information is displayed on the LCD The selections depend on the installed options Use UP or DOWN to select either CO2 ppm Temp CO2 Temp Rotate or None Factory default is CO2 ppm For a basic CO2 only device the selection is limited to CO2 ppm or None CO2 ppm Only the actual ppm value of the CO2 reading will be displayed Temp Only tempe...

Page 6: ...es in 1 minute increments to prevent false alarms The default is 0 minutes no delay Use UP or DOWN to toggle the relay ON or OFF to test the relay operation Press MENU to reset to OFF and advance or or 12 RELAY SETPOINT 13 RELAY HYSTERESIS 14 RELAY DELAY 15 RELAY TEST RELAY ASSIGNMENT DEFAULT SETPOINT SETPOINT RANGE RESOLUTION Temp High 26 0 C 79 0 F 5 0 to 40 0 C 40 0 to 100 0 F 0 5 Temp Low 15 0...

Page 7: ...several minutes and then press and hold UP or down button for five seconds until display shows Calibrat Done or Calibrat Fail Refer to Calibration section in this document for more details MENU Press to exit the menu and return to normal mode MENU Press to exit the menu and return to normal mode 19 CO2 CALIBRATION 20 CO2 CALIBRATION CALIBRATION Calibration with gas requires a field calibration kit...

Page 8: ...racter OPTIONAL TEMPERATURE SENSOR Type Various Thermistors and RTDs Accuracy Thermistors 0 2 C 0 36 F 25 C 77 F Platinum RTD s 0 3 C 0 54 F 0 C 32 F Nickel RTD s 0 4 C 0 72 F 0 C 32 F Range 0 to 50 C 32 to 122 F Output 2 wire resistive Relay Optional 2 wire output Form A N O 2 Amps 140 Vac 30 Vdc Override Switch Optional 2 wire output 50 mA 12 Vdc max OPTIONAL SETPOINT CONTROL Type Front panel up...

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