Maximum CO2 Value
Displays the highest CO2 concentration value observed by the sensor since
the last power cycle or reset.
Reset the MAX CO2 concentration by pressing and holding the ENTER button
for 1 second.
Relay on set point
Sets the CO2 concentration which the optional relay is energized (also
concurrently energizes the front facing LED for -S models).
Low limit: 0 PPM
Factory setting: 1100 PPM
High limit: 2000/5000 PPM (depending on model)
Relay off set point
Sets the CO2 concentration which the optional relay is de-energized (also
concurrently de-energizes the front facing LED for -S models). 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: 1050 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 CO2 concentration combined with temperature or
relative humidity (Series CDTR only).
CH CO2 concentration 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
Temperature Offset
Allows the user to add an offset to the measured temperature.
Range: ±5°C in 0.5°C increments (±9°F in 1°F increments)
Factory Default: 0°C
Humidity Offset (CDTR only)
Allows the user to add an offset to the measured relative humidity.
Range: ±10% in 1% increments
Factory Default: 0% RH
CO2 low output range
Sets the CO2 concentration 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)
CO2 high output range
Sets the CO2 concentration 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 CO2 level. When COH is below COL, the
transmitter is reverse acting and the output will increase with a decrease in
CO2 level.
Low limit: 0 PPM
Factory setting: 2000/5000 PPM (depending on model)
High limit: 2000/5000 PPM (depending on model)
MAX
RON
ROF
DSP
UNI
OFT
OFH
COL
COH
TOL
TOH
HOL
HOH
BAR
ABC
RST
Temperature low output range (Series CDT with active temperature only)
Sets the temperature for the lowest output (4 mA or 0 VDC).
Low limit: 32.0°F/0.0°C
Factory setting: 32.0°F/0.0°C
High limit: 122.0°F/50.0°C
Temperature high output range (Series CDT with active temperature only)
Sets the temperature for the highest output (20 mA, 5 VDC or 10 VDC).
When TOH is set above TOL, the transmitter is direct acting and the output
will increase with an increase in temperature. When TOH is below TOL, the
transmitter is reverse acting and the output will increase with a decrease in
temperature.
Low limit: 32.0°F/0.0°C
Factory setting: 122.0°F/50.0°C
High limit: 122.0°F/50.0°C
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
Automated Baseline Correction
Enables/disables the Automated Baseline Correction algorithm for disabling in
locations that experience elevated levels of CO2due to constant occupancy of
the area. Select “ON” to enable ABC and select “OFF” to disable ABC.
Factory Default: ON
Reset to Factory Defaults
Resets all menu settings to their default value, and clears zero and span.
YES - Press and hold -- button for several seconds to reset settings
NO - Press -- button to exit this menu item without resetting
Menu Descriptions
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