Relay on set point
Sets the CO2concentration which the optional relay is energized.
Low limit: 0 PPM
Factory setting: 1000 PPM
High limit: 2000/5000 PPM (depending on model)
Relay off set point
Sets the CO2concentration which the optional relay is de-energized. Setting
value lower than RON provides direct action for detecting high concentrations
of CO2. Setting value higher than RON provides indirect action for detecting
low concentrations of CO2. Up button and Down button on the LCD display
will be lit to indicate when the relay is energized.
Low limit: 0 PPM
Factory setting: 950 PPM
High limit: 2000/5000 PPM (depending on model)
Display conguration
Determines the LCD display conguration during normal operation. The LCD
display can indicate the CO2concentration, temperature, relative humidity
(Series CDTR only) and CO2concentration combined with temperature or
relative humidity (Series CDTR only).
CH CO2concentration and relative humidity (Series CDTR only)
CT CO2concentration and temperature
TH Temperature and relative humidity (Series CDTR only)
C CO2concentration only
T Temperature only
H Relative humidity only (Series CDTR only)
Units selection
Temperature and barometric pressure measurements can be displayed in US
engineering units or SI engineering units. The factory default is to display US
engineering units.
US units °F for temperature and in Hg for barometric pressure
SI units °C for temperature and hPa for barometric pressure
CO2low output range
Sets the CO2concentration for the lowest output (4 mA or 0 VDC).
Low limit: 0 PPM
Factory setting: 0 PPM
High limit: 2000/5000 PPM (depending on model)
CO2high output range
Sets the CO2concentration for the highest output (20 mA, 5 VDC or 10 VDC).
When COH is set above COL, the transmitter is direct acting and the output
will increase with an increase in CO2level. When COH is below COL, the
transmitter is reverse acting and the output will increase with a decrease in
CO2level.
Low limit: 0 PPM
Factory setting: 2000/5000 PPM (depending on model)
High limit: 2000/5000 PPM (depending on model)
Average Atmospheric Carbon Dioxide value
Sets the value at which the sensors automatic background calibration will
reference. Factory setting derived from research from the National Oceanic
and Atmospheric Administration (NOAA).
Low limit: 200 PPM
Factory setting: Current NOAA value
High limit: 9999 PPM
RON
ROF
DSP
UNI
COL
COH
AAC
HOL
HOH
BAR
CAL
RST
Humidity low output range (Series CDTR only)
Sets the humidity for the lowest output (4 mA or 0 VDC).
Low limit: 0.0%
Factory setting: 0.0%
High limit: 100.0%
Humidity high output range (Series CDTR only)
Sets the humidity for the highest output (20 mA, 5 VDC or 10 VDC).
When HOH is set above HOL, the transmitter is direct acting and the output will
increase with an increase in humidity. When HOH is below HOL, the transmitter
is reverse acting and the output will increase with a decrease in humidity.
Low limit: 0.0%
Factory setting: 100.0%
High limit: 100.0%
Barometric pressure
Sets the typical barometric pressure for the location where the transmitter is
mounted. The factory setting is for standard pressure at sea level. Adjusting the
barometric pressure gives a more accurate measurement, especially at higher
elevations. Refer to the elevation charts in Figure 7 for typical barometric
pressures at a given elevation.
Low limit: 20.0 in Hg / 677 hPa
Factory setting: 29.9 in Hg / 1013 hPa
High limit: 32.0 in Hg / 1084 hPa
Calibration
Calibrates the carbon dioxide sensor to a known gas value. Read
calibration instructions before using this feature. Hold Enter button for 5
seconds.
Reset to Factory Defaults
Resets all menu settings to their default value, and clears zero and span.
YES - Press & hold -- button for several seconds to reset settings
NO - Press -- button to exit this menu item without resetting
Menu Descriptions
