1 Introduction  
Preparing Your Multimeter
8 U1231A/U1232A/U1233A User’s Guide
HELP and dEMo modes
The  HELP and dEMo modes can be enabled through the 
power- on options (see 
page  13).
1 While in the flashlight power- on mode, press   or   
until   is shown to enable the HELP mode.
2 While in the flashlight power- on mode, press   or   
until   is shown to enable the dEMo mode.
3 Press   or   to cycle between the HELP,  dEMo, or 
flashlight mode. Press and hold   for more than 1 
second to toggle the flashlight on or off (for any of the 
modes — HELP,  dEMo, or flashlight mode).
• To conserve battery life, a user-adjustable timeout can be set to control 
how long the flashlight stays on. To set a timeout period, refer to 
“Enabling the LED flashlight timeout” on page 91.
• You can also adjust the flashlight’s intensity to conserve battery life. 
The default intensity is high. To change the flashlight’s intensity level 
refer to “Adjusting the LED flashlight intensity” on page 92.
• Use the power-on option (hold   while powering on the multimeter) 
to enable the flashlight without multimeter operation. In this mode, you 
can adjust the flashlight intensity using the   or   keys, as well as 
cycle between the HELP mode, dEMo mode, or flashlight mode using 
the   or   keys. To learn more, see “HELP and dEMo modes” on 
page 8 and “Power-on options” on page 13.
When the HELP mode is enabled, the multimeter flashes the international 
Morse code distress signal (· · · — — — · · ·) repeatedly. Use this option to 
send a visual alert or notification of a distress in progress.
When the dEMo mode is enabled, the multimeter demonstrates the 
flashlight and beeper abilities by flashing the flashlight repeatedly 
accompanied by a melody tone.