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Section 7
7.8
USING THE 1020 RESET SEQUENCE
Should you encounter an operating problem that blocks access to the System Menu, or the meter
operates erratically after exposure to a power transient or some other traumatic event, this might
require the use of the reset sequence in order to restore proper operation. System 1020 provides two
system resets. The first uses the KeyPad and the second method uses a PC command sent via the
RS-232 interface (providing you have access to the flow computer in this way). This section describes
both system reset methods.
The reset sequence operates on two levels. The first level deletes all the data currently in Active Memory,
but leaves Datalogger data and all stored Site Setups intact. This is the most desirable method since
to restore operation all you have to do is reload a saved Site Setup. If this fails then you have to use the
second level, which clears ALL Dynamic Memory. Be aware that this action erases all saved Site
Setups (including flow calibrated sites), any logged data and any user-defined pipe and transducer
tables. This will require you to re-initialize the flow computer and transducers and repeat all desired site
settings, custom pipe tables, etc.
7.8.1 SYSTEM RESET USING THE KEYPAD
As mentioned previously, there is a power-on delay of approximately 30 seconds from the time that you
apply power to the 1020 flow computer to when the 16 x 2 Character LCD becomes active. The reason
for the delay is to give you a chance to perform the following system reset procedure.
To clear Active Memory using the KeyPad:
Turn off power (if it is currently on) and the reapply power to the system.
Press and hold ENTER
note the message on the LCD display:
Clr Active Memory? Yes/No
> No
Press
. Note that the greater than (>) symbol changes to a (:) colon. Press
second line to [Yes] (as shown in the right-hand figure above).
Press ENTER
To restore operation, create a new site setup or recall a stored site setup and then re-select any
Meter Facilities items (e.g., RS-232 setup parameters) that you may have edited originally.
during the power-on delay. Examine the left-hand figure below and
W ide B eam
Wide Beam
C lamp-O n
Clamp-On
Ultrasonic
U ltrasonic
Flowmeter
Flow meter
to clear the contents of Active Memory (but preserve any stored Site Setups).
Clr Active Memory? Yes/No
: Yes
7-13
1020NFM-1D
W ide B eam
Wide Beam
C lamp-O n
Clamp-On
Ultrasonic
U ltrasonic
Flowmeter
Flow meter
to change the
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