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3 Devices with potentiometer and LED (STM 820)
3.1 Structure
The STM 80 battery chargers comprise the following components:
1 Potentiometer for setting the battery capacity
2 LED for indicating the operating status
3 Mains cable
4 Charging clips: red = +, black = –
3.2 LED statuses
Colour
Status
Meaning
Red
Permanently illuminated
Connection fault: no battery is connected, or
a battery is connected with reverse polarity
Orange
Permanently illuminated
Charge: battery is being charged (main charging)
Green
Permanently illuminated
Recharge: battery is more than 90% charged
end-of-charge voltage has been reached
Green
Slow flashing
1 s an, 1 s off
Trickle charging: battery is 100% charged,
battery voltage is being reduced
Red
Slow flashing
1 s an, 1 s off
Battery fault: charging is interrupted,
battery with too high or too low a voltage is con-
nected, or overvoltage due to additional power
supply/charger
Red
Rapid flashing
50 ms an, 50 ms off
Device fault: charging is stopped. Send the device to
the manufacturer for inspection, and do not use it
any longer!
4 Devices with potentiometer and LED (STM 860)
4.1 Structure
The STM 860 battery chargers comprise the following components:
1 LED for indicating the operating status
2 Mains cable
3 Charging clips: red = +, black = –
4 Mains switch for switching the device on and off
4.2 LED statuses
Colour
Status
Meaning
Red
Permanently illuminated
Connection fault: no battery is connected, or
a battery is connected with reverse polarity
Orange
Permanently illuminated
Charge: battery is being charged (main charging)
Green
Permanently illuminated
Recharge: battery is more than 90% charged
end-of-charge voltage has been reached
Green
Slow flashing
1 s an, 1 s off
Trickle charging: battery is 100% charged,
battery voltage is being reduced
Red
Slow flashing
1 s an, 1 s off
Battery fault: charging is interrupted,
battery with too high or too low a voltage is con-
nected, or overvoltage due to additional power
supply/charger
Red
Rapid flashing
50 ms an, 50 ms off
Device fault: charging is stopped. Send the device to
the manufacturer for inspection, and do not use it
any longer!
Device image 80
Device image 860
