TESTO 454 - Alarm

8Main menu
8.6 Device
Select an alarm criterion:
Overrun
The alarm is triggered when the parameter measured
value, defined by you, overruns on a specified chan-
nel. An intermediate rate is recommended to check
the alarm criterion frequently (see Chapter 8.6.5).
Underrun
The alarm is triggered when the parameter measured
value, defined by you, underruns on a specified
channel. An intermediate rate is recommended to
check the alarm criterion frequently (see Chapter
8.6.5)
Gradient
The alarm is triggered once the measured value of a
specified parameter in the defined channel changes
quicker than that of the limit value defined by you.
The specified value refers to::
∆ t = 1 s
Difference
When a differential value (of a parameter) in two of
the channels specified by you has been overrun the
alarm is triggered.
Confirm your selected alarm criterion with <Enter>.
27
Ein
On
Enter /
Ein
On
Enter /
Ein
On
Enter /
Ein
On
Enter /
Ein
On
Enter /
Device
Auto-Off
Im.rate
ålarm I
Alarm off
øverrun
K1: °C
+123.4
Alarm off
©radient
K1: °C
15.00
Alarm off
∂ifference
K1: °C-K1
38.00
Alarm off
¨nderrun
K1: °C
+123.4
∆ <w>
∆ t
8.6.6 Alarm
testo 454 offers two alarm outputs whose trigger criteria, separated from each other, can
be defined in the menu “D
EVICE”, submenu “ALARM”. The alarm is controlled when the
measuring program is running or not running. The alarm outputs are electrically isolated
from the usual wiring parts in the testo 454 but are connected to one another.
Please use the cable 0554.0012 available as an accessory. The alarm output is switched
through and remains active as long as one of the following alarm criteria applies. The gra-
dient is the exception which remains active if once activated and can only be switched off
manually (“Alarm off”).