Data logger operating manual
7
EN
Model TCO
The TCO data logger has three internal sensors to detect measured values from
a total of seven channel groups. These channel groups (measured values) are:
Air temperature in °C, air temperature in °F, dew point in °C, dew point in °F, rel-
ative humidity in %, absolute humidity in g/m³ and CO
2
concentration in ppm.
For each channel group, there are four measuring channels for recording:
Current measured value (cur), minimum measured value (min), maximum meas-
ured value (max) and average measured value (mid). In total, there are 28 meas-
uring channels available for your TCO data logger, as shown in table 1.
7.2. Displaying measured values
One of the channel groups specified in table 1 for displaying measured values
can be configured to be displayed on each of the three measured value rows.
Here, the current measured value is always shown on the display.
7.3. Data recording
If either of the operating modes M3 or M4 are selected, then the data logger is
in logging mode (REC) and the measured values of the measuring channels se-
lected for recording are saved in the device.
Up to 20 of the measuring channels specified in table 1 can be simultaneously
recorded in the data memory of the measuring device.
Recording begins immediately from the moment that the operating mode M3 or
M4 is selected and is carried out in ring mode. This means that when the
memory limits are reached, the recording does not stop but continues to record.
The older values are simply overwritten by the newest measured values.
R
Tip: Current, minimum, maximum and average measured values for
a channel group each represent one measuring channel. If these
values should be available for later documentation and evaluation, each of
the measuring channels must already be selected during memory organi-
sation for recording, because it is not possible to calculate these values
in the software.
The specifications for type, duration and scope of data recording in the logging
mode can be individually set in the software. Detailed information is provided in
the software manual.
8. Alarm function
8.1. Alarm configuration
An alarm function can be configured in the measuring device administration for
each of the measuring channels selected for display or recording.
By defining an upper and lower alarm limit value, a value corridor is specified.
This is the so-called good range and when the range is exited, an alarm sounds.
Note: The alarm function can only be represented on the display for the chan-
nel groups of the three measuring channels selected for measured value
display, and only in the operating modes M2 and M3!
However, saving alarm results of other selected measuring channels in logging
mode is independent of the selected display of the measured values. That
means that the alarm results of the measuring channels which are not for
display but for data recording are also recorded.
Even in the operating mode M4 when displaying measured values is deactivated,
all preselected alarm results are recorded!
8.2. Alarm display
The alarm display is only possible for
measured values which are preselected
for displaying and which have been con-
figured with an active alarm function.
If an alarm occurs at one of these meas-
uring channels, the alarm symbol
flashes beside the measured value dis-
play for this channel while the good
range is exited.
If the measured value then reaches the
defined value corridor, that is, the good range, then the alarm symbol stops
flashing and is shown continually.
This indicates that an alarm result has occurred. If the good range is exited
during the course of a measurement, the alarm symbol flashes again.
Reading the measured value memory deletes the alarm display.
Additionally, a hysteresis can be set by which the measured value must return
to the valid range to switch off the alarm.
8.3. Acoustic alarm
If an alarm goes off while the acoustic function is activated (see chapter 6.2.4.
Acoustic function), then an alarm tone sounds and only stops when the measured
value returns to the good range.
Example display for an alarm result of the
measuring channel shown in the first
measured value row.
Alarm display
Upper alarm
limit value
Valid value
corridor
“good range”
Lower alarm
limit value
flashing
static
Logging mode
Reading the measured value memory
