Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 34)

IM 12J05D02-01E
4-2 Operation
Figure 4-1. DO402 operator interface
4-2. Explanation of operating keys
MODE key This key toggles between the Measuring and Maintenance modes. Press once to obtain
access to the maintenance function menu. (Level 1 see table 4-1)
Press again to return to the Measuring mode (press twice when hold is activated).
YES/NO keys These are used to select choices from the menu.
YES is used to accept a menu selection.
NO is used to reject a selection, or to move ahead to the next option.
DATA ENTRY keys ( ENT)
is used as a “cursor” key. Each press on this key moves the cursor or flashing digit
one place to the right. This is used to select the digit to be changed when entering
numerical data.
is used to change the value of a selected digit. Each press on this key increases
the value by one unit. The value can not be decreased, so in order to obtain a
lower value, increase past nine to zero, then increase to the required number.
ENT When the required value has been set using the > and ^ keys, press ENT to con-
firm the data entry. Please note that the EXA 402 does not register any change of
data until the ENT key is pressed.
* key This is the Commissioning mode key. It is used to obtain access to the Commissioning
menu. This can only be done with the cover removed or opened. Once this button has
been used to initiate the Commissioning menu, follow the prompts and use the other
keys as described above.
HOLD FAIL
YES NO
ENT
SETPOINTS
RANGE
SET HOLD
SERVICE
MEASURE
H2O.CAL
DISPLAY
HOLD
NO MODE YES
ENT
S1
S2
WASH/S3
FAIL/S4
YOKOGAWA
MODE
AIR.CAL
WASH
TEMP.MAN.
CONTACTS
MARKINGS
WITHIN
ENCLOSURE
MAN.CAL
12J6B2-04
FRONT EXA DO402
Output hold flag
Manual temperature
compensation flag
Fail flag
Menu pointer flags
Commissioning
function menu
Commissioning
mode access key
Relay contact
status indicators
Measure/Maintenance
mode key
Broken line indicates area
that can be seen through
front cover
Adjustment keys
> : Choose digit to
adjust
^ : Adjust digit
ENT : Confirm change
Selection keys
YES : Accept setting
NO : Change setting
Key prompt flags
Message display
Main display