MAN0984_Iss 4_01/19
Touchpoint Plus
Pt. No. 3011M5001
76
Technical Handbook
3)
Touch [Start] while applying clean air to the sensor.
4)
Wait until the sensor reading becomes stable
.
5)
Confirm the zero calibration reading and then touch [Next].
6)
Touch [Target concentration.] and enter the target concentration of your span gas (%LEL) followed by [Finish].
7)
Touch First calibration to toggle it on or off as appropriate. Failing to carry out First calibration on new sensors
may falsely reduce their useful life, while carrying it out on used sensors may lead to unexpected sensor failures.
8)
When ready, touch [Start] and apply your span gas to the sensor.
9)
Wait until the sensor reading becomes stable
.
10)
Confirm that the gas reading is correct and touch [Finish]:
11)
Remove the span gas from the sensor and confirm that the gas reading has returned to zero. Choose whether or
12)
not to calibrate another channel
Touchpoint Plus will exit the calibration menu no matter of current gas reading in calibration mode in 45 s after
purging gas step. User may see gas alarm if user cannot ensure the gas reading value of Touchpoint Plus lower than
alarm level in purging step.