Serviceability - TESTO 300 LL NEXT LEVEL Instruction Manual

6 Conclude measurement: tap Next.
7
If applicable, repeat measurement: tap

9.5.15 Serviceability

This measurement is carried out to test the serviceability of an existing gas pipe
system (in contrast to the load test and tightness test 1) and is used to check the
actual condition of the pipes. The pipe system may be in operation or disused.
Adhere to DVGW-TRGI 2018, worksheet G624!
Absolute pressure (parameter of the measuring location) must be
entered to obtain correct readings. If this is not known, it is advisable to
use the value 966 hPa (corresponds to 1013 hPa barometric, 400 m
above sea level).
The testo 300 NEXT LEVEL is not certified according to DVGW G5952;
therefore, no serviceability test according to DVGW-TRGI 2018 may be
carried out with this instrument. We recommend testo 324 for this
measurement, which has been tested and certified in line with DVGW
G5952 by DVGW Karlsruhe and also according to the ÖVGW Guideline
1/2.
> Insert the connector plug of the hose pressure connection kit (0554
1203) into the flue gas socket and lock it in place by turning it slightly
clockwise (bayonet fitting).
Carrying out the measurement
The pressure socket of the instrument must be free (depressurized, not

closed).

Pressure zeroing has been carried out.
1
Call up function:
2
Set parameters or enter values.
All values that can be modified have a dotted underlining.
Three circle diameters and three pipe lengths can be entered, which
are then used to calculate three partial volumes. The pipe volume is
calculated by adding these three partial volumes.
3
Pressurize the system.
9 Performing the measurement
| Tightness test 2
.
73