TESTO 557 - First steps; Inserting batteries;rechargeable batteries; Performing settings

5 First steps
12
5 First steps
Inserting batteries/rechargeable batteries
1. Fold out the hanging hook and open the battery compartment
by squeezing the clip lock.
2. Insert batteries (included in delivery) or rechargeable batteries
(4x 1.5 V, type AA/Mignon/LR6) in the battery compartment.
Observe the polarity!
3. Close the battery compartment.
- After inserting the batteries, the instrument switches on
automatically and goes into the settings menu.
When not in use for long period: Take out the batteries /
rechargeable batteries.
Performing settings
1. Press [Set] to confirm or change unit parameter settings
2. Press [▲]
or [▼] to change the units / parameters.
- The settings will be accepted once the last selection has been
made.
Key functions
Key Functions Description
[▲] or [▼] Change parameters and select units
[Set] Confirm units / parameters
Adjustable parameters
Representation Explanation
°C, °F
Set unit for temperature.
bar, kPa, MPa, psi
Set unit for pressure.
Pabs, Prel or psig Depending on the chosen unit for pressure:
Change between absolute and relative
pressure displays.
micron, inHg, Pa,
hPa, mTorr,Torr,
inH2O, mbar
Set pressure unit for vacuum.
/ /
Select the measuring mode