Yokogawa EXA DC402 Dual-Channel Conductivity Analyzer - Manual (Page 22)

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 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 SERVICE. Now push the “YES” button. Selecting and entering “Service Code” num-
bers 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 SETPOINTS Adjust alarm setpoints (when activated) 5
CALIB 1(2) Calibration with a standard solution or a sample 6
DISPLAY 1(2) Read auxiliary data or set message display 4
HOLD Switch hold on/off (when activated) 5
Commissioning SETPOINTS Adjust alarm setpoints 5
RANGE Adjust the output range 5
SET HOLD Activate the hold function 5
TEMP Select method of temperature compensation 5
Service SERVICE Fine tune the specialized functions of the 5
(Access to coded entries converter
from the commissioning
level)
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.