Yokogawa EXA SC202 2-Wire Conductivity Transmitter/Analyzer - Manual (Page 43)

IM 12D08B02-01E
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 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 11.
Measurement Mode
MODE key
* key
CALIB(ration)
NO key
*OUTP Output Range Setting
NO key
DISP.1
NO key
*HOLD HOLD Settting
NO key
DISP.2
NO key
*TEMP.1 Temperature Setting
NO key
HOLD
NO key
· Select desired mode and press YES
· The MODE key is used as a "Cancel and Return to Measurement Mode" escape key
*TEMP.2 Temperature Setting
NO key
*SERV Service Mode
NO key
Maintenande Mode Commissioning Mode
Service Mode
Can operate with front panel shut Need to open front panel cover to operate
Table 4-1. Operations overview
Routine Function Chapter
Maintenance CALIB
DISP. 1, 2
HOLD Calibration with a standard solution or sample
Read auxiliary data or set message display
Switch hold on/off (when activated) 6
4
5
Commissioning *OUTP
*HOLD
*TEMP. 1, 2 Adjust the output range
Activate the hold function
Select method of temperature compensation 5
5
5
Service
(Access to coded entries
from the commissioning level)
*SERV Fine tune the specialized functions of the transmitter 5
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.
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