DMTA-10022-01EN, Rev. C, January 2015
Chapter 7
136
Alarm reference values that were entered in one unit system are displayed as the
equivalent value when the alternate units are selected.
7.5 Locking the Instrument
The 45MG is equipped with an instrument lock that can be used by a supervisor to
restrict access to selected functions. The supervisor can also enter a password to
prevent other users from unlocking the functions. Once a password has been set, you
must reenter the password before you can lock or unlock any function.
The following functions can be locked:
• Calibration with [CAL VEL] and [CAL ZERO]
• Gain and waveform adjustments with [GAIN/WAVE ADJ]
• Transducer setup recall with [XDCR RECALL]
• Setup menu accessed with [SETUP]
• File menu or datalogger operations accessed with [FILE]
When locking [CAL VEL] and [CAL ZERO], the function ([2nd F], [CAL ZERO]
(Do ZERO)) is still available.
Locking the calibration prevents changes to calibration values, thus preventing
parameters from affecting the value of the measurement, including material velocity
and test-block zero calibration. However, you can still view these values, use the
measurement screen, and use the datalogger functions.
Anytime a user attempts to use a locked function, a message appears in the help bar to
indicate that the function is locked (see Figure 7-8 on page 137).
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