Manual 2100-549G
Page
48 of 59
MENU DESCRIPTIONS
RON
Relay on set point
Sets the CO
2
concentration which the optional
relay is energized.
Low limit: 0 PPM
Factory setting: 1000 PPM
High limit: 2000/5000 PPM (depending on model)
ROF
Relay off set point
Sets the CO
2
concentration which the optional
relay is de-energized. Setting value lower than
RON provides direct action for detecting high
concentrations of CO
2
. Setting value higher
than RON provides indirect action for detecting
low concentrations of CO
2
. or 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)
DSP
Display configuration
Determines the LCD display configuration
during normal operation. The LCD display can
indicate the CO
2
concentration and the
temperature, the CO
2
concentration only or the
temperature only. The factory default is to
display both the temperature and the CO
2
concentration.
CT
CO
2
concentration and temperature
C
CO
2
concentration only
T
Temperature only
UNI
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
barometeric pressure
SI units
C for temperature and hPa for
barometric pressure
COL
CO
2
low output range
Sets the CO
2
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)
COH
CO
2
high output range
Sets the CO
2
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 CO
2
level. When COH is below
COL, the transmitter is reverse acting and the
output will increase with a decrease in CO
2
level.
Low limit: 0 PPM
Factory setting: 2000/5000 PPM (depending on model)
High limit: 2000/5000 PPM (depending on model)
TOL
Temperature low output range
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
TOH
Temperature high output range
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 intemperature.
Low limit: 32.0°F / 0.0°C
Factory setting: 122.0°F / 50.0°C
High limit: 122.0°F / 50.0°C
BAR
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.
Low limit: 20.0 in Hg / 600 hPa
Factory setting: 29.9 in Hg / 1013 hPa
High limit: 32.0 in Hg / 1100 hPa
U
V
