Features and Functions 2
Keysight U1241B and U1242B User’s and Service Guide 37
1 Remove the power on the contacts or switch before measured.
2 Press at position to activate the switch counter function. The
multimeter will detect the switch condition as shown in Table 2-1.
3 Press to restart the switch counter, the multimeter will check the
current switch condition and set intermittent recognition for the counter.
4 Press to select time base in 10 seconds, 100 seconds or Hand
(user-defined). The second display shows 10, 100 or HAn respectively.
5 The first intermittent will cause the multimeter to beep and starts to down
count the time base. Each intermittent will increase the counter once.
6 The counter value and time base are indicated on primary display and
secondary display respectively. Press to start next counting.
7 Press to exit switch counter function.
Table 2-1 Annunciator display for each switch condition
Switch Condition Circuit Switch Display
Low Level (< 430 Ω) Normally close Lo
Intermittent Close to open Number of switch count
Intermittent Open to close Number of switch count
High level Normally open Hi
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