Tensiometer’s preliminary manual - TSS V1 r. 4 dtd 06/02/06
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3
Electrical connections
3.1
Instrument’s power supply
Instrument has been developed in order to work with four high capacity NiMH AA 1,2 V
rechargeable batteries. It is possible to use batteries of different type and different capacity from
the one supplied, maintaining the compatibility with the supplied recharger.
Manufacturer indicates a finite number of charge /discharge cycles for the supplied batteries. As
indication around 1000 cycles may be expected.
In order to obtain best performances and working life as long as possible, Manufacturer suggests:
•
Avoid to use such type of batteries with batteries built around different technologies.
•
Use batteries that have equal capacity.
•
Prior their use fully charge the batteries.
•
Do NOT short circuit, do NOT solder, do NOT dismount, do NOT throw in the fire the
batteries..
•
Respect indicated polarities when installing the batteries in the system.
•
It is suggested to proceed, periodically, to a full discharge and charge cycle.
•
The charge time depends from battery capacity and form the current supplied by the charger.
Prior to battery substitution it is mandatory to power off the instrument with power switch
[2], in order to avoid possible damages.
It is strongly required to respect polarity indication when installing new batteries in the unit
so to avoid damages to the batteries of the instrument. In the battery holder a sticker
indicates the polarity to be respected.
A female plug [5] is present, in order to connect an external power supply.
The following indications must be respected:
1.
When the supplied power supply is used for long term measurements,
all installed batteries
must be removed from the instrument
.
2.
The male connector of the external power supply must respect the following indications:
•
positive of the power supply on the central connection;
•
power supply ground (GND) on the external connection;
3.
In order to have that the instrument works correctly (without any installed battery) it can be
powered with a power source with
maximum output voltage of 5,5
Vdc
and minimum
output voltage of 2 Vdc. In this condition the power supply must be in position to provide
continuatively 300 mA.
4.
A continuous use of the serial connection of the measurement system to a remote computer
will increase the power consumption, having a consequent shorter battery life.
When serial connection to a remote computer is expected it is suggested to use the external
line power supply rather than the batteries.
Please refer to battery charger and external line power supply manual for Manufacturer’s
indications about its correct use.
