Performing The Measurement; Prepare For Measurement; Zeroing Phases - TESTO 300 LL NEXT LEVEL Instruction Manual

9 Performing the measurement

Prepare for measurement

9.1
1 Check the condensate container fill level and if necessary empty
container, see Section 10.5 Empty condensate trap.
2 Check the particle filter of the flue gas probe for contamination and
replace it in good time. If necessary, see Section 10.10 Check/replace
particle filter.

Zeroing phases

9.2
Measuring the combustion air temperature (AT)
If no external combustion air temperature probe or testo 915i Smart Probe is
connected, the combustion air temperature is measured via the integrated
temperature probe.
Gas zeroing
The gas sensors are automatically zeroed after the instrument is switched on.
testo 300 NEXT LEVEL without probe zeroing option in the flue
gas:
The flue gas probe must be in fresh air during the zeroing phase (30
seconds)!
testo 300 NEXT LEVEL with probe zeroing option in the flue gas:
The flue gas probe may already be in the flue gas duct during the
zeroing phase (30 seconds).
>
Start zeroing of the gas sensors manually:
Draught/pressure zeroing
The pressure sensors are zeroed when a pressure measuring function is called
up.
testo 300 NEXT LEVEL without probe zeroing option in the flue
gas:
The flue gas probe must be in fresh air during the zeroing phase! The
instrument must not be pressurized during zeroing!
testo 300 NEXT LEVEL with probe zeroing option in the flue gas:
The flue gas probe may already be in the flue gas duct during the
zeroing phase. The pressure socket of the instrument must be free
(depressurized, not closed).
9 Performing the measurement
| Zeroing Gas Sensors
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