Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 46)

IM 12B07D02-01E
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 user’s manual. Figure 4-1 shows the EXA operator inter-
face.
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 *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 AUT.CAL Calibration with programmed buffer solutions 6
MAN.CAL Calibration with other buffer solutions 6
SAMPLE Grab sample calibration 6
DISP Read auxiliary data or set message display 4
MAN.IMP Manual start of impedance check 5
TEMP Select automatic or manual compensation 5
HOLD Switch hold on/off (when activated) 5
Commissioning *OUTP Adjust the output range 5
*HOLD Activate the hold function 5
Service *SERV Fine tune the specialized functions of the transmitter 5
(Access to coded entries
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.
mA mA