Chapter 1. Programming Site Data
50 DigitalFlow™ DF868 Multipurpose Ultrasonic Liquid Flowmeter Programming Manual (2-Channel)
1.7.12 Activating Security
In order to prevent unauthorized tampering with the flowmeter’s programming, the Model DF868 is equipped with a
security feature that either locks all the keys except [PROG] (which, when pressed, requires the password) or locks
out the following menus:
• Program Menu [PROG]
• Calibration Menu [CAL]
• Log Menu [LOG]
• Clear Menu [CLR]
When the system is locked, access to the above menus will be denied unless the correct password is entered. The
Model DF868 is shipped with a default password, which is given at the end of this chapter. For increased security, the
default password should be changed.
IMPORTANT: Once the system has been locked, it can only be unlocked by entering the password, because access to
the SECUR submenu is restricted.
While following the programming instructions, refer to the menu map in Figure 14 on page 101.
IMPORTANT: It is recommended that all program parameters be recorded before
changing the password. (This
information should be recorded in Appendix B, Data Records, as a matter of routine.) If the password is
lost, the site data is not
retrievable and will have to be re-entered.
1. To enter the GLOBAL menu, press [F3]=GLOBL.
2. To enter the SECUR submenu, press [
and [F3].
3. At the Lock Out prompt, press [F1] = UNlck to unlock the system and return to the initial User Program screen, or
press [F2] = LOCK to lock the system.
Note: If the system was unlocked at the above prompt, the following steps do not appear.
4. Enter the current Password (2719 is the default password) and press [ENT].
5. At the Edit Password prompt, press [F1] = NO to leave the password unchanged and proceed to step 8 on the
next page, or press [F2] = YES to enter a new password.
IMPORTANT: Since the default password is printed in this manual, a new password should be entered. If the password
is ever lost, contact the factory for assistance.
6. Enter the New Password and press [ENT]. Any combination of letters and numbers up to a total of 21 characters
may be used as a password.
Note: Keep in mind that the password may have to be entered frequently from the keypad. A long and/or complex
password may soon become annoying to use.
7. Verify the New Password by entering it again and press [ENT]. Be sure to record the new password in a safe
place.
8. At the Lockout Level prompt, press [F1] to lock only the PROG, CAL, CLR and LOG menus, or press [F2] to lock all
the keys except [PROG].
Procedure Options
You have completed entering data in the Global Program. Continue as follows:
• To continue programming the meter, refer to the menu maps in Appendix A and navigate to the desired menu.
Then, proceed to the appropriate section of this manual for instructions.
• To leave the Global PROGRAM and retain the previous settings, press [EXIT] twice and then press [F1] = NO at the
SAVE prompt. Any programming changes will be discarded and you will be returned to the data display.
• To leave the Global PROGRAM and return to measurement mode, press [EXIT] twice and then press [F2] = YES at
the SAVE prompt. Your programming changes will be entered into the meter’s memory, and you will be
returned to the data display.
1.8 Saving Site Data
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