Page 5
BackLite
Auto
The BackLite setting is used to control how the LCD backlight functions. Use
<UP> or <DOWN> to select either Auto, Off or On. Auto means the backlight only
lights when a menu is accessed or when the setpoint is activated (ie: when a key
is pressed), Off means the backlight is always off and On means it is always on.
Factory default is Auto.
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
9. BACKLIGHT
Only if
Relay
option Installed
Only if
Temperature Sensor
option Installed
Relay
CO2
T Offset
0.0
°
C
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.
The T Offset value allows calibration of the temperature value displayed on the
LCD. Units (°C/°F) follow the Temp Units setting. Use <UP> or <DOWN> to add
or subtract an offset from the temperature value. The range is -5.0 to 5.0 °C or
-9.0 to 9.0 °F in 0.1° increments. Factory default is 0.0 °C.
11. RELAY
10. TEMPERATURE OFFSET
Relay SP
1000 ppm
Relay SP
1000 ppm
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.
or
12. RELAY SETPOINT
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
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
Relay Hy
50 ppm
Relay Hy
0.5
°
C
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).
or
13. RELAY HYSTERESIS
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
Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: +1 506 853 3057 Web: www.greystoneenergy.com
IN-GE-CD2DTXXX-03
