DATAPAQ TP3
Specifications and Operation
21
NiMH Rechargeable Batteries
The logger can use a pack of four rechargeable 1.2 V nickel-metal-hydride
(NiMH) cells. These are suitable for applications where the logger’s operating
temperature (i.e. the temperature of the logger itself) does not exceed
70°C/158°F.
Only Datapaq battery-packs are suitable.
For the service life and replacement of the battery, see p. 22.
Life of NiMH Batteries
The data below can serve as a guide – though the values given are no more than
an indication of the battery life that can be expected. See p. 19 for general
considerations that affect actual battery life.
No. of
Channels
Sample
Interval
(sec.)
Logger
Temperature
Battery Life (hrs)
No Radio
Telemetry
Radio
Telemetry Used
10
3
25°C/77°F
–
–
10
3
70°C/158°F
–
150
10
60
25°C/77°F
280
–
10
60
70°C/158°F
200
–
10
180
25°C/77°F
–
–
10
180
70°C/158°F
–
240
20
3
25°C/77°F
–
–
20
3
70°C/158°F
–
110
20
60
25°C/77°F
200
–
20
60
70°C/158°F
150
–
20
180
25°C/77°F
–
–
20
180
70°C/158°F
–
160
Charging NiMH Batteries
Recharge the battery as follows.
1. Plug the charger into the electricity supply.
2. Plug the charger lead into the charging socket on the logger.
A full charge is typically delivered in less than 2 hours, maximum about 3 hours.
Indication of battery/charging status is provided by colored LEDs on the logger
(see p. 15).
The charger must not be used if the ambient temperature is below 10°C/50°F
or over 40°C/104°F.
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