Power Supply; Battery Operation And Supply Voltage Monitoring; Mains Operation; External Dc Voltage Supply - Ahlborn ALMEMO 2490-2 Operating Instructions Manual

6. Initial commissioning
Measured value display and sensor adjustment via ´Measuring points -
Measured values´
Data logging on the computer :
Program the cycle via ´Devices - Programming´
Open the terminal window via ´File - Terminal´
´File - Terminal - Open log ´, enter file name, ´Save´
Start the measuring operation by click ´Start´
Stop the measuring operation by click ´Stop´
´File - Terminal - Close log´
Activate file e.g. from MS-Excel and import using ´;´ as separator;

7. POWER SUPPLY

Power can be supplied to the measuring instrument in any of the following
ways : 3 AA alkaline batteries (included in delivery)
Mains adapter 12V, 0.2A with ALMEMO
Electrically isolated power supply cable (10 to 30 VDC, 0.25 A)
12V DC clamp connector to socket DC (options U and I)
Our product spectrum includes all the appropriate accessories.

7.1 Battery operation and supply voltage monitoring

Power is supplied to the measuring instrument as delivered by 3 AA batteries.
At a current consumption of approx. 16 mA the operating time will be approx.
150 hours. The current operating voltage is displayed each time the the device
is switched on; this gives you a basis for estimating the remaining operating
time. When the remaining battery capacity drops to approx. 10 percent, the
LOBAT arrow will appear in the display. If the batteries are completely dis-
charged the device will switch off. To replace old batteries first unscrew the
battery compartment cover (7) on the rear of the device.

7.2 Mains operation

The ALMEMO ®
preferably using mains adapter ZA 1312-NA1 (12 V / 0.2 A) via the DC socket
(4). Please ensure that the mains voltage is correct.

7.3 External DC voltage supply

The DC socket (4) can also be used to connect another DC voltage, 10 to 30 V
(minimum 200 mA). This is via an ALMEMO
ever, the power supply has to be electrically isolated from the transducers, then
option U (OA 2490-U) is needed or 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
14 ALMEMO
2490 can be supplied with power from an external source
2490
®
® connector
connector (ZA1000-FSV). If, how-
®
connector there is a 9-
®
ZA1312-NA1
ZA2690-UK
ZA1000-FSV