12. Trouble-shooting
20
in minutes; this will help save the batteries. This automatic device switch OFF
will not take effect if the setting is ´- -´ or if a mains adapter or an interface cable
is connected.
11.2
Device locking
The measured value in the main field of the display can be manipulated by
pressing key
CLR
and setting it to zero. This function can be evaluated in differ-
ent ways or even switched off in cases where there is a risk of accidentally ac-
tivating relative measuring by zero-setting the measured value.
Loc
parameter :
0 The offset is saved in RAM, base or zero-point - depending on locking
1 The offset is saved in RAM only.
2 Relative measuring is locked
12.
TROUBLE-SHOOTING
The ALMEMO
®
2450-1L measuring instrument can be configured and pro-
grammed in many versatile ways. It is suitable for connecting a wide variety of
different sensors. Given these numerous possibilities the device may in certain
circumstances not behave quite as expected. The cause of such unexpected
behavior is only very rarely a device defect; more usually it is incorrect operation
by the user, an invalid setting, or unsuitable cabling. In such event try to pinpoint
and clear the problem with the aid of the following tests.
Error:
No display, display malfunction, keys do not react
Remedy:
Check the power supply;
replace the batteries;
switch off and
then on again; if necessary re-initialize (see 7.3).
Error:
Measured values are incorrect.
Remedy:
Switch Device OFF / ON, press key and hold
CLR
. Check all the
sensor programming very carefully, especially the base value and
zero-point.
Error:
Fluctuating measured values or the system hangs in mid-operation.
Remedy:
Check the cabling for any inadmissible electrical connections,
Unplug any suspicious sensors.
Connect hand-held sensors in air or phantoms (for thermocouples
short-circuit AB) and check.
Connect the sensors again one at a time and check successively.
If a fault persists for any one connection, then check all wiring; if nec-
essary, insulate the sensor and eliminate interference by using
shielded or twisted wiring.
Error:
´
CALEr
´
is displayed when the device is switched on.
Remedy:
The calibration of a measuring range may have become misadjusted.
The device must be recalibrated at the factory.
If, after performing the above-listed checks and remedial steps, the device still
fails to behave as described in the operating instructions, it must be returned to
our factory in Holzkirchen with error description.
Содержание ALMEMO 2450-1L
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