User manual

Operating Instructions data logger
6
EN
7. Measuring Value Display and Data Logging
7
.1. Sensors, Channel Groups and
Measuring Channels
THI data logger
The THI data logger has two internal sensors with which it can measure values
from a total of six channel groups. The channel groups (measured variables)
are as follows: air temperature in °C, air temperature in °F, dew point in °C,
dew point in °F, relative humidity in % and absolute humidity in g/m³.
Each channel group has four measuring channels with which logging can be
performed: current measuring value (act), minimum measuring value (min),
m
aximum measuring value (max) and the average value (avg). This means that
your THI data logger has a total of 24 measuring channels, as shown in table 1.
THIP data logger
The THIP data logger has three internal sensors with which it can measure values
from a total of eight channel groups. The channel groups (measured variables)
are as follows: air temperature in °C, air temperature in °F, dew point in °C, dew
point in °F, relative humidity in % and absolute humidity in g/m³, relative air
pressure in hPa and absolute air pressure in hPa.
Each channel group has four measuring channels with which logging can be
performed: current measuring value (act), minimum measuring value (min),
maximum measuring value (max) and the average value (avg). This means that
your THIP data logger has a total of 32 measuring channels, as shown in table 1.
TCO data logger
The TCO data logger has three internal sensors with which it can measure values
from a total of seven channel groups. The channel groups (measuring variables)
are as follows: air temperature in °C, air temperature in °F, dew point in °C, dew
point in °F, relative humidity in % and absolute humidity in g/m³ and CO
2
concentration in ppm.
Each channel group has four measuring channels with which logging can be
performed: current measuring value (act), minimum measuring value (min), maxi-
mum measuring value (max) and the avearge value (avg). This means that your
TCO data logger has a total of 28 measuring channels, as shown in table 1.
7.2. Displaying Measuring Values
Each one of the channel groups as specified in Table 1 can be configured to dis-
play measurements in each of the three measuring value lines on the display.
T
he display always shows the current measurement.
7.3. Data Logging
The data logger is in logging mode (REC) when the operating modes M3 or M4
have been selected. The measuring values of the previously selected measuring
channels are saved into the logger.
U
p to a total of 20 of the measuring channels as specified in Table 1 can be
logged into the data memory at the same time.
Logging begins as soon as one of the logging modes M3 or M4 has been
selected and continues in ring mode. This means that logging is neither inter-
rupted nor discontinued, because there is no memory limit. The data logger
simply writes the latest measurements over the oldest values.
R
Tip: The current, minimum, maximum and average measuring values
of a channel group represent one individual channel. If these values
are to be made available for later assessment and documentation, then each
of these measuring channels must be selected for logging while you are
determining where you would like your data to be saved, as these values
cannot be calculated by the software at a later point in time.
The specifictions for the type, duration and scope of data logging in logging
mode can be selected individually via the software. You will find more detailed
information in the software manual.
Table 1 : Overview of sensors, channel groups (measuring variables) and data logger measuring channels
Sensor /
Measuring element
Channel group
(measuring
variable)
Unit
Measuring channels available for data logging
(max. 20 channels can be saved)
and for display* (max. 3 channels can be displayed)
Can be dis-
played in meas-
uring value line
all
models
internal
temperature sensor
temperature [°C] act min max avg 1, 2, 3
temperature [°F] act min max avg 1, 2, 3
dew point [°C] act min max avg 1, 2, 3
dew point [°F] act min max avg 1, 2, 3
internal
humidity sensor
rel. humidity [%] act min max avg 1, 2, 3
abs. humidity [g/m³] act min max avg 1, 2
only
THIP
internal
air pressure sensor
rel. air pressure** [hPa] act min max mitt 1, 2, 3
abs. air pressure [hPa] act min max mitt 1, 2, 3
only
TCO
internal
carbon dioxide sensor
CO concentration** [ppm] act min max mitt 1, 2, 3
* When a channel is selected to be shown on the display, the current measuring value (act) is always displayed automatically.
** In order to be able to determine the measuring value accurately, the height of the location must first be entered using the SmartGraph software.