Rolec smart card meters

[Doomed]

Is there any way to disable the low credit beeping the newer models have.
Rolec told me they only do the beeping ones, but they will cause me loads of grief if I install them with the beeping enabled. They are to go into a marina environment and are in the rolec cases, have fitted 2 already and had complaints within 3 days.

 

[driverman]

I'm not 100% sure, but once install/commissioned, is there not a button on there? If so, hold it down for several seconds. Is the beeping, to indicate credit getting low/run out? It will beep first time credit runs low. Thereafter, by holding down a (red?)button, it will not beep.
Rolec install loads on marinas also. I'm sure there is a way out of it.