4
1. Normal Operation
The RL101M Head unit monitors the LEL gas level. If the gas level is greater than or equal to the
background setting, the unit will send a message every 5 seconds; if less than the background setting,
the unit will send a message every 5 minutes. When the RL101M is in normal mode, 0.00 will show on
the display.
2. NUL
To place the RL101M into NUL Mode press Menu once. "
nuL
" will flash on the display. The RL101M
Head unit will monitor the gas level but will not send messages when in
NUL
Mode. NUL Mode is used
for removing any errors in the amplifiers that may cause a gas reading when there is no gas. Use the Up
button once to automatically adjust the readings to zero.
Use Up button or reed switch and
it will automatically adjust
readings to zero
