9
Battery lifetime
With a sample interval of 1 hour and 50 m system length (without OTT ITC)
Lithium batteries:
at least 5 years
Alkaline batteries:
at least 1.5 years (high quality battery types)
Note
At 0 °C, alkaline batteries drop to approximately 50 % of their original 20 °C
capacity and at –10 °C they drop to approximately 35 % due to their design.
If temperatures drop below 0 °C at the measurement station, it is recommended
that lithium batteries be used.
Check the battery voltage as follows
Set up the PC/OTT Orpheus Mini communication link (see Chapter 7.2).
Select the "OTT Orpheus Mini" menu, "View Instantaneous values" function
1)
➝
the OTT Orpheus Mini starts an instantaneous value measurement
➝
the
"Observer" window indicates the current battery voltage and the energy
consumed from the batteries so far in Ah.
If the battery voltage is ≤ 3.5 to 3.6 volts
➝
replace the batteries.
Click on the "Exit" button.
Close the operating program.
1)
If set appropriately (Menu "File", function "Options"), the operating program starts at the
same time the "Observer" window is opened.
Replace dead batteries as follows
Open the top cap/observation well cover.
Pull the communication unit approximately 80 cm out of the observation well
and hold (a second person would be useful).
Slide the pipe casing of the communication unit approximately 30 cm in the
direction of the pressure probe cable. (The rubber stop located on the pressure
probe cable (see Fig. 1) prevents the pipe casing from falling. Do not move the
rubber stop!)
Remove dead batteries.
Insert 3 new batteries (LR6/FR6 · AA) into the battery compartment as shown
in Figure 2 within 10 minutes. Ensure that the polarity is correct!
Slide the pipe casing of the communication unit back on until it stops.
Slowly and carefully replace the communication unit in the observation well.
Close the top cap/observation well cover.
Notes
The OTT Orpheus Mini stores the measured values in a non-volatile memory.
There is no loss of data when changing batteries.
This also applies to storage without batteries over a long timespan.
If it takes longer than approx. 10 minutes to replace dead batteries, the time
(and possibly the date) will have to be re-entered (see Chapter 13, "Date and
time settings"). Furthermore, it takes – dependent on how much data is stored –
up to 7 minutes until the OTT Orpheus Mini begins measurement again.
When replacing the batteries, we recommend changing the desiccant capsules
at the same time (see Chapter 16.2, "Replacing the desiccant capsules").
Summary of Contents for Orpheus Mini
Page 1: ...Operating instructions Groundwater Datalogger OTT Orpheus Mini English...
Page 40: ...40 Appendix A Declaration of conformity OTT Orpheus Mini...
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