Switching On / Off, Reinitialization; Data Buffering; Connecting The Transducers; Transducers - Ahlborn ALMEMO 2490-2 Operating Instructions Manual

volt sensor supply voltage available (maximum 150 mA) (self-healing fuse, 500
mA). Other voltages (12, 15, or 24 V or references for a potentiometer and
strain gauge) can be obtained using special connectors; (see Manual 4.2.5 and
4.2.6).

7.5 Switching ON / OFF, reinitialization

To switch the device ON briefly press and release the key
middle of the keypad; to switch the device OFF press and hold down the key
. After the device is switched off all saved values and settings are re-
ON OFFr
tained intact; (see 7.6).
If interference (e.g. electrostatic) or a malfunction (e.g. battery failure) causes
the device to behave abnormally, the device can be reinitialized. To activate
RESET press and hold down the key
all settings - except the device designation - to the factory default status. Only
the programming of the sensors in the ALMEMO
fected.

7.6 Data buffering

The sensor's programming is stored in the EEPROM on the sensor connector
and the device's calibration and programmed parameters are stored in the EE-
PROM on the instrument itself, both on a fail-safe basis. Date and time-of-day
are retained intact if the device is just switched off but are lost when the batter-
ies are replaced.

8. CONNECTING THE TRANSDUCERS

Virtually any ALMEMO
M0 (and / or M1 on version 2490-2) on the measuring instrument (1). To con-
nect your own existing sensors you simply need the appropriate ALMEMO
connector.

8.1 Transducers

®
The ALMEMO
®
ALMEMO range of sensors (see Manual Ch 3) and instructions for connecting
your own existing sensors to ALMEMO
standard sensors with an ALMEMO
range and units already programmed and can thus be connected to any input
socket without further adjustment. A mechanical coding system ensures that
sensors and output modules can only be connected to the correct sockets. All
®
ALMEMO connectors incorporate two snap-lock levers; these snap into posi-
tion as soon as the connector is inserted into the socket, thus preventing unin-
tended disconnection if the cable is accidentally pulled. To withdraw the
connector, both these levers must be pressed in at the sides.
For the ALMEMO
sensors are available with spray-coated ALMEMO
®
sensor can be connected to ALMEMO
Manual includes detailed descriptions of the comprehensive
®
2490 version with the optional seal new specially designed
CLR r when switching on. This will restore
connectors remains unaf-
®
®
instruments (see Manual Ch 4). All
®
connector usually have the measuring
®
connectors incorporating a
ALMEMO
Sensor supply
(6) in the
ON OFFr
®
input socket
® 2490 15
®