FLIR ThermaCAM PM575, Operator'S Manual

Page: 39 / 68

[ 5.5.2.2 — Ref temp ]
© FLIR Systems AB – Publ. No. 557 369 – Ed. A 31
of known emissivities can be created and edited in the AGEMA ™ Report PC soft-
ware. See the software Operator’s Manual for further information.
N.B. – The emissivity file can be stored at root level or at directory level. However,
the camera software prioritizes files that are stored at directory level and the direc-
tory has to be selected in order to store the emissivity file in the camera memory. If
the camera software does not find an emissivity file at directory level, it searchess
for similar files at root level and saves those instead.
The object parameters are described in “Theory of thermography” on page 51.
5.5.2.2 Ref temp
Activating this command by pressing
↵
will set the Ref temp equal to the momen-
tary temperature of the active measurement function. In the result table, the sym-
bol
∆
will indicate the difference between the measurement function’s temperature
and the reference temperature. If the camera is set to single-spot mode, the iso-
therm value will always be used as the reference temperature. If it is set to multi-
spot mode, the reference temperature can be set to any one of the active mea-
surement functions by higlighting that particular function and then selecting
Ref
temp . It is also possible to set the Ref temp manually . See “Obj par...” on page 30
N.B. – To enable the Ref temp function, see “Setup menu” on page 35
Example:
Point the Area function (with Maximum option enabled, Setup
→
Analysis
→
Area
function
→
Maximum ) at a good phase of a power breaker and activate the Ref
temp command. This will set the reference temperature to the hottest temperature
of the good phase. Point the same area function at the faulty phase and read the
increase in difference in temperature as the difference temperature (
∆
) under the
Area max function.
5.5.2.3 Spot
A maximum of three independently measuring spot meters can be activated. Each
spot meter can be positioned anywhere on the screen by confirming that particular
spot meter in the
Analysis menu and then moving it with the joystick.
The multiple spots option is selected in the Setup
→
Analysis
→
Multiple spots
→
On menu.
The spot meter function measures the temperature of the crosshair and displays
the value in the result table. In the
Setup
→
Analysis
→
Spot menu the spotmeter
mode can be selected. In the Manual mode the position of the crosshair is con-
trolled by the joystick. When the required spot position has been set press the
↵