7 Operation and maintenance
7.1 Operating and maintenance notices
Pressure connections must be protected from soiling.
7.2 Battery
If the empty frame in the battery display blinks, the batteries are depleted and must be
replaced. However, the device will still operate for a certain length of time.
If the display text appears in the main display, the battery voltage is no longer ad-
equate for operation of the product. The battery is fully depleted.
Unnecessary screwing places the water-tightness of the product, among other things,
at risk and should be avoided.
Proceed as follows to replace the batteries.
The product is switched off.
The product is now ready for use again.