TESTO 6681 Instruction Manual page 51

 Editing H O
2
This menu is only used to parameterize humidity measurements in H
atmospheres (e.g. in sterilization processes) and determines whether
°Ctm,°Ftm or %rFm is the output parameter.
1 Select H O
2
with SET.
The selection H
in the submenu describes whether H
evaporation or is actively evaporated in the process.
2 Select H O
2
 or  and confirm with SET.
3
Editing proportion by weight of H
weight in the liquid end solution): Scroll one digit to the right using ,
increase value of digit by 1 using . Confirm with SET or abort entry
with ESC.
4 Go back to H
unit using  or .
 Selecting absolute pressure unit (Abs. pressure unit)
This parameter determines the humidity variables, standardised atmospheric
dewpoint (°CtA, °FtA), relative humidity (g/kg or gr/lb) and water content
(ppm or % vol).
vol
1 Press SET, select desired unit (selection: bar, psi, mPa, hPa) using 
or  confirm selection with SET or cancel with ESC.
2 Continue to Absolute Pressure with  or .
 Editing absolute pressure(Abs. pressure value)
You can set a value for the process absolute pressure.
1 Using  or , select Abs. pressure value and confirm selection with
SET.
The absolute pressure is displayed.
2 Scroll one digit to the right using , increase value of digit by 1 using
. Confirm with SET or abort entry with ESC.
proportion by weight (optional with 3rd analog output)
2
Weight Proportion using  or  and confirm selection
2
O passively vaporized or H
2 2
passively vaporized or H
2
by pressing ESC and continue to Absolute pressure
O
2 2
testo 6681
O
2 2
O is created through
2 2
O actively vaporized using
2 2
O in % (% H O
2 2 2
- 1.4 Operation 51
O
2 2
actively vaporized
proportion by
2