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7.3 External DC voltage supply
The DC socket (3) can also be used to connect another DC voltage, 6 to 30 V
(minimum 200 mA).
If, however, the power supply has to be electrically isolated from the transducers,
then electrically isolated supply cable ZA 2690-UK must be used. It will then be
possible to use the measuring instrument in a 12-volt or 24-volt on-board supply
system.
7.4 Sensor supply
At the terminals + (plus) and – (minus) in the ALMEMO
voltage of 6 to 12 V (maximum 150 mA) is available automatically; this corre-
sponds to the minimum sensor voltage programmed for the measuring chan-
nels. (see Man., 6.10.5) Other voltages (15 V or references for a potentiometer
and strain gauge) can also be obtained using special plugs. (see Man., 4.2.5 ,
4.2.6).
7.5 Switching ON / OFF, reinitialization
The
key (5) is located in the middle of the keypad; to switch the de-
ON
PROGr
vice ON press once briefly and release; to switch the device OFF press and
hold down. When the device switches OFF all saved values and settings are
retained intact. (see 7.6)
If interference (e.g. electrostatic charge, battery failure) causes the device to
behave abnormally, it can be reinitialized.
F2
r
down key
when switching on. This will restore all settings to factory de-
fault status - including the configuration of internal measuring channels - but
excluding device designation.
will remain unaffected.
7.6 Data buffering
The sensor's programming is stored in the EEPROM on the sensor plug; the
device's calibration and programmed parameters are stored in the EEPROM
on the device itself; both are fail-safe.
8. PAIRING
On leaving our factory the wireless measuring instrument and the sensor mo-
dule are paired; i.e. these two components interconnect immediately and auto-
matically as soon as they are switched on.
measuring instrument interconnected with some other sensor module, such
pairing can be performed manually in the following way.
1. Switch the wireless measuring instrument OFF.
2. Plug the sensor module into the wireless measuring instrument (socket M0).
3. Switch the wireless measuring instrument ON by pressing the
4. These components should now be paired automatically.
It can be connected using ALMEMO
Sensor programming in the ALMEMO
External DC voltage supply
®
plug ZA1000-FSV.
®
plug a sensor supply
To activate Reset press and hold
If you wish to have the wireless
PAIR and RDY should
ALMEMO
2790
®
®
plugs
ON PROG
key (5).
13
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