UM-0090-B1E
DT90 Range User Manual
Page 30
RG
If the device does not send information on the battery charge level along with the transmitted measurement data despite
being set to do so, the battery charge level can be read in the following way:
-
Set a PC/ DT90 connection (USB)
-
Select the
Sensors
tab in the
DT90 Configuration
software and check whether the internal power supply
channel has been configured. If not, it must be configured first.
-
Select the Logger tab in the
DT90 Configuration
software.
-
Click the
Measurement
button and
DT90
will begin a measurement of the present values
-
After the ordered measurement has been completed, the device will show the last measured values, including
the battery voltage level
DT90 starts measurement after a battery connector is inserted (it does not have a power switch) into the board. If you
want to turn DT90 off, disconnect the battery. This prevents premature battery discharging and logging non-
representative measurements.
Charging Flat Battery
If the device battery has discharged during transport it must be charged first. In order to do that, connect a working
external power source (solar panel, an AC/ DC power supply) to the service/power supply port with the device enclosure
open.
If no diodes on the motherboard light up, wait for 10 minutes and disconnect the external and internal power source (in
this order). After 15 seconds connect them again in reverse order (first the internal and then the external power source).
If no effect is observed, perform the entire procedure once again after 15 minutes.
If the data logger continues to give no answer, contact the manufacturer to consult further actions. If possible, check the
internal power source voltage using a DC voltmeter at each disconnection by checking the voltage at the plug connectors
(a meter with thin probes is required).
Moisture Absorber Replacement
Inspect the absorber every time you open the enclosure. It is advised to replace the absorber with a dry after a long
period of operation without opening the enclosure (I.e.: 1 year). However periodic replacement is not required due to the
IP67-rated device enclosure.
There are two types of moisture absorber that can be used:
-
Capsule absorbers are cylindrical moisture absorbers made of white polypropylene that is sealed with a barrier
that allows for moisture passing. Owing to the additional protection, it does not produce dust and is resistant to
mechanical damage. The capsules have moisture indicators. A color change from light blue to light pink
indicates that the capsule must be replaced regardless of the time since the last replacement.
-
Pouch absorbers come in the form of a pouch filled with moisture-absorbing granules. This protection prevents
dusting. It is also moderately resistant to mechanical damage. Pouch absorbers do not have moisture
indicators. The condition of moisture-absorbing granules must be inspected visually through the pouch. A dry
absorber is usually light colored and becomes darker with the increase in moisture.
Notes:
1. Pouch absorber can be dried up quickly in an oven with the temperature set to no more than 140°C (min. 100°C).
2. Capsule absorber cannot be dried up using the oven because the risk of polypropylene melting.
