Metrohm 709 IC Pump - Manual (Page 43)

4.4 Diagnosis
709 IC Pump
35
4.4.5 Initialize and test RAM
On the odd occasion large disturbing signals (e.g. mains spikes, light-
ning, etc.) can have an adverse effect on the processor functions and
hence lead to a system crash. After such a crash the RAM area must be
initialized. Although the basic instrument data remain stored, the RAM
initialization should be performed only when necessary since the stored
user data (flow rate, P
min
, P
max
etc.) are cleared as a result.
1. Power off.
2. Press and hold <
↓ > key 5 (keep pressed) and power on.
3
3. Release < ↓ > key 5.
3
RAM is tested and initialized.
3 0 0
8.8.8.8.8
2.5 x
4. The lost data of the user must now be reentered.
The "FLOW" LED
lights up.