TESTO 454 - 8.7 Probe Configuration

8Main menu
8.7.1 Unit
The probe prepared with the current/voltage cable is
connected to the measuring instrument. The measur-
ing range has to be set in the current/voltage cable
before the instrument is switched on. Please observe
the permissible measuring ranges.
Select the unit of your probe in the “P
ROBES” menu.
Go back to the “PROBES”menu.
8.7.2 Scaling
In the menu “Scaling” you can change or enter the
upgrade and the offset of a probe manufactured by
another company or of a measuring transducer. The
entry of A1 and AO is based on the formula
f(x) = A1
*
x + AO
A1 is the upgrade and A0 is the offset from the zero
point. The + or - signs can be changed via
<up><down> and confirmed with <Enter>. Then
enter the respective numerical value and confirm
your entry with <Enter>.
Return to the “P
ROBE” menu via <Arrow>.
8.7.3 Calibration
Calibration is possible in this menu point if CO
2
probes are available. Please note the probe descrip-
tion.
29
Probes
¨¨nit
Scaling
Calibrate
Probes
Unit
‚caling
Calibrate
Probes
Unit
Scaling
çalibrate
Unit
K1: %
Units
°C
°F
%
8.7 Probes
Probes other than Testo probes which have a voltage output of 0 to 1 V or a current output
of 0/4 to 20 mA can be connected to the testo 454. The current/voltage cable no.
0554.0007 is offered for this. This cable is equipped with an automatic recognition of the
respective input signal, so that you can assign a unit and a scaling to this signal (as
described below in the “UNIT
” menu).
There is also the possibility to measure voltages, frequencies and resistances with the
adapter cable no. 0554.0013. These parameters are not automatically recognised and
have to be preprogrammed in the menu “S
ELECT”.
Ein
On
Enter /
Ein
On
Enter /
Scaling
K1: %
K1: %
A1 +6.24
A0 -24.60
Ein
On
Enter /
Ein
On
Enter /
Ein
On
Enter /