Protecting Setpoints - HP 5890 Series II Plus Reference Manual

Keyboard and Displays

Protecting setpoints

Additional information regarding INET control is available in Chapter 5,
Signal Output. Servicing may be required for one or more devices on the
INET loop if communication cannot be established.
Protecting setpoints
The HP 5890 provides a keyboard lock feature to minimize possibility of
stored setpoints being altered unintentionally. When the HP 5890
keyboard is locked, setpoint values (numeric values, A, B, OFF, and
ON) may only be displayed; they cannot be altered.
remain functional, so runs may be started or stopped.
To lock instrument setpoints, first enter the key sequence:
CLEAR
Then press
Figure 2•5shows displays occurring during this process.
Figure 2-5
Keyboard Lock Displays
38
.
- ENTER
to lock the keyboard, or
ON
CALIB AND
KEYBOARD
KEYBOARD
to unlock the keyboard.
OFF
ACTUAL
TEST [0-0]
ACTUAL
LOCK ON
ACTUAL
LOCK OFF
and
START STOP
SETPOINT
SETPOINT
SETPOINT