CWT Compact S2 Installation & Maintenance Manual
Battery levels
The CWT C can send battery measurements of the battery voltage to WebOffice for monitoring.
The CWT will send the battery voltage measured during regular intervals to WebOffice
The warning and error levels can be set but are default set to:
•Warning = 11.9 V
•Error = 11.5 V
When the CWT has sent a warning; e.g. due to a power down; the terminal will send a recovery event to WebOffice when the battery is charged to its normal level again.
If a Warning is sent and no recovery event is sent within a day, it may be time to change the battery
| Note: The gel type, lead-acid battery supplied by Flowbird is maintenance free but will wear out over time. Verify on a regular base if the contacts are not corroded. If so the battery and the cable should be replaced as soon as possible. |
Mains-powered terminal
The battery needs replacement if the yellow light on the charger on a mains-powered terminal remains lit even after a longer charging time.
Lead accumulators
Follow normal procedures for the handling of lead accumulators. Instructions are usually available from the battery supplier.
Follow local regulations for the disposal of replaced batteries. Used batteries should be returned for recycling if required according to local laws and regulations.
| Note: The gel type, lead-acid battery supplied by Flowbird is maintenance free. Verify on a regular base if the contacts are not corroded. If so the battery and the cable should be replaced as soon as possible. |
Battery on CPU board
In some cases, the back-up batteries on the CPU boards are causing malfunctions (real-time clock instability, memory loss). This is caused by bad contact between the contact springs of the battery holder and the coin cell battery.
| Caution: It is very important that the battery is of an approved brand (Duracell, Eveready, Panasonic, Ray-O-Vac, Sanyo, Varta, Toshiba, Seiko or another major battery manufacturer) and that it is kept clean. Oils from fingers (i.e. fingerprints) may together with humidity and time cause problems. Such dirt may just as well be deposited on the underside of the positive contact spring, if a dirty battery has been mounted in the holder. |
As the holder is made from a material impervious to most industrial solvents, you may use almost any cleaning solvent at hand (isopropyl alcohol is recommended). Flowbird recommends wearing cotton or latex gloves when replacing batteries in order to prevent fingerprints on the battery surfaces. It is also recommended to inspect the positive spring contact to establish that it has not been bent upwards to such an extent that the pushing force has been affected, even as it is made out of spring steel.
To prevent excessive bending of the positive contact spring, Flowbird recommends using of a pair of plastic (or otherwise insulated) pliers when mounting new batteries. The coin cell should be pushed in such that the cell is in contact with the plastic housing of the battery holder, not bending the positive contact spring upwards more than necessary.
The CPU board contains a lithium battery (button cell) that should be returned for recycling if required according to local laws and regulations. The battery (CR2032, 3 V, 210 mAh, 20 mm diameter) supplies backup voltage to the real-time clock in case of interrupted power supply from the 12 V batteries.
| Important: To ensure uninterrupted terminal operation; replace the battery every 5 years. |
| Warning: Lithium batteries can be dangerous because they can explode if short-circuited. Handle batteries in accordance with local laws and regulations. |
