Yokogawa EXAxt PH450 4-Wire Analyzer for pH and ORP - Manual (Page 44)

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IM 12B07C05-01E
5-13. Advanced setup
Defaults
The functionality of the EXAxt allows to save
and load defaults to come to a known instru-
ment setting. The EXAxt has both factory and
user defined defaults.
After a “load default” the instrument will reset.
The following parameters are not included in
the defaults
1. X-axis timing
2. Auto return (10 min / disabled)
3. Tag
4. Passwords
5. Date and time
6. Language
7. The contents of all logbooks
8. HART parameters
(address, tag, descriptor, message)
Tag
A tag provides a symbolic reference to the
instrument and is defined to be unique
throughout the control system at one plant site.
A tag can contain up to 12 characters. If the
instrument is purchased with the /SCT option,
the TAG is pre-programmed with the specified
tagnumber.
Passwords
Calibration and Commissioning may be sepa-
rately protected by a password. By default both
passwords are empty. Entering an empty pass-
word results in disabling the password check.
A password can contain up to 8 characters.
When a password is entered for the calibration
and commissioning a 4-digit operator ID can be
entered. One can also leave the ID empty.
Date/time
The Logbooks and trend graph use the clock/
calendar as reference. The current date and
time is set here. The current time is displayed
in the third “zoom” menu.
Note! The fixed format is YYYY/MM/DD HH:
MM:SS
HART
The address of the EXAxt in a HART network
can be set. Valid addresses are 0...15.
FACTORY ADJUSTMENT
This menu is for service engineers only.
This section is protected by a password.
Attempting to change data in the factory adjust-
ment menu without the proper instructions
and equipment, can result in corruption of the
instrument setup, and will impair the perform-
ance of the unit.