User Manual

5 Using the manifold
11
5.1.2. Connecting temperature probe(s)
Note: The testo 549 does not include temperature probes in the
initial scope of delivery.
Surface temperature probe
At least one NTC temperature probe must be connected to
measure the pipe temperature, for automatic calculation of
superheating and subcooling.
Deactivating the surface compensation factor for insertion and
air temperature probes
A surface compensation factor has been set in the measuring
instrument to improve the measuring accuracy of surface
temperature readings.
If the manifold is used in combination with insertion or air
temperature probe (optional), this factor must be deactivated:
1. Press
[Set] repeatedly until T
fac
is displayed.
2. Press
[▲] or [▼] to set T
fac
to Off.
3. Press
[Set] to continue through the settings menu until the
measurement/home view is displayed.
-
T
fac
is shown on the display if T
fac
is disabled.
5.1.3. Switching Bluetooth® on and off (only testo 550)
In order to to establish a connection via Bluetooth, on an Android
or iOS device, the Testo App Refrigeration must be already
installed.
You can download the App for iOS in the Apple App Store or for
Android in Google Play.
The App is compatible with devices using iOS 7 or higher /
Android 4.3 or 4.4.
1. To turn on the Bluetooth press
[▲] and [▼] simultaneously and
hold down for 3 seconds.
- Once the Bluetooth icon is shown on the display, Bluetooth is
switched on.
Display
Description
flashes
There is no Bluetooth connection, or a
potential connection is being searched for.
is permanently
displayed
There is a Bluetooth connection.