2
About The Meter
8
2.5 FRONT-PANEL BUTTON LOCK OUT (For Security Purposes)
2.5.1 Jumper Lock Out
To lock all front-panel buttons
, remove the S3-A jumper (refer to Figure 3-2).
To lock the MENU button only
, verify that the S3-B jumper is removed, then install the
S3-A and S3-E jumpers (refer to Table 3-1). If you press the
MENU
button, the meter
shows “
LOCK
” and returns to the run mode.
2.5.2 Push Button Lock Out
To lock the
RESET
,
MENU
and
SETPTS
buttons only, verify that the S3-A jumper is
installed and the S3-E jumper is not installed, then follow these steps:
In the run mode -
1. Press and hold down the
RESET
button. The meter shows “
SP.RS
” or
“
RUN
”. Do not release the
RESET
button.
2. Press the
MENU
button and hold the
RESET
button down (3-5 seconds) until
the meter shows “
LOCK
”.
3. Release both buttons.
To unlock the
RESET
,
MENU
and
SETPTS
buttons, follow these steps:
1. Press and hold down the
RESET
button. The meter shows “
LOCK
”.
Do not release the
RESET
button.
2. Press the
MENU
button and hold the
RESET
button down (3-5 seconds)
until the meter shows “
UN.LK
”.
3. Release both buttons.
