Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 33)

IM 12J05D02-01E
Operation 4-1
4. OPERATION; DISPLAY FUNCTIONS AND SETTING
4-1. Operator interface
This section provides an overview of the operation of the EXA operator interface. The basic procedures
for obtaining access to the three levels of operation are described briefly. For a step-by-step guide to
data entry, refer to the relevant section of this instruction manual. Figure 4-1 shows the EXA operator
interface.
LEVEL 1: Maintenance
These functions are accessible by pushbutton through a flexible front cover window. The functions make
up the normal day-to-day operations that an operator may be required to complete. Adjustment of the
display and routine calibration are among the features accessible in this way. (See table 4-1).
LEVEL 2: Commissioning
A second menu is exposed when the EXA front cover is removed and the display board is revealed.
Users gain access to this menu by pressing the button marked * in the lower right of the display board.
This menu is used to set such values as the output ranges and hold and wash features. It also gives
access to the service menu. (See table 4-1).
LEVEL 3: Service
For more advanced configuration selections, press the button marked * , then press “NO” repeatedly
until you reach *SERV. Now push the “YES” button. Selecting and entering “Service Code” numbers in
the commissioning menu provide access to the more advanced functions. An explanation of the Service
Codes is listed in chapter 5 and an overview table is shown in chapter 10.
Table 4-1. Operations overview
Routine Function Chapter
Maintenance AIR. CAL Calibration in air ( preferred method) 6
(level 1) H2O. CAL Calibration in aerated water 6
MAN. CAL Process calibration based on grab sample 6
DISP Read auxiliary data and set message display 4
HOLD Switch HOLD on/off *
)
5
SETP Adjust alarm setpoints *
)
5
WASH Start wash cycle manually *
)
5
M.TEMP Adjust manual temp*
)
5
M.PRESS Adjust manual press 5
Commissioning *SETP Adjust alarm setpoints 5
(level 2) *RANGE Adjust output range(s) 5
*HOLD Activate HOLD function 5
*WASH Activate and configure the wash timer 5
Service *SERV Configure the specialized functions of the converter 5
(level 3)
* )
Only possible if activated
NOTE:
All three levels may be separately protected by a password. See Service Code 52 in chapter 5
Service Code table for details on setting passwords.