Data Buffering; Connecting Sensors / Transducers; Sensors / Transducers; Measuring Inputs And Additional Channels - Ahlborn ALMEMO 2470-1S Operating Instruction

7.7 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. Date and time-of-day settings are re-
tained intact if the device is just switched off but will be lost as and when the
batteries are replaced.

8. CONNECTING SENSORS / TRANSDUCERS

Virtually any ALMEMO
on ALMEMO measuring instrument 2470-2/2S. To connect your own existing
®
sensors you simply need the appropriate ALMEMO

8.1 Sensors / transducers

The ALMEMO ®
ALMEMO range of sensors (see Manual, Chapter 3) and instructions for connect-
®
ing your own existing sensors to ALMEMO
4). All 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 ® plugs incorporate two snap-lock levers; these snap into position as
soon as the plug is inserted into the socket, thus preventing unintended discon-
nection if the cable is accidentally pulled. To withdraw the plug both these
levers must first be pressed in at the sides.
For the ALMEMO
cially designed sensors are available with spray-coated ALMEMO
porating a double sealing lip to protect the socket unit against the effects of
splashing water. For any unused sockets protective stoppers are available.

8.2 Measuring inputs and additional channels

ALMEMO ® measuring instruments 2470-1/2 have respectively 1 and 2 input
sockets (1); to these input sockets initially measuring channels M0 (and M1)
are assigned. However, ALMEMO
channels. The additional channels can be used in particular for humidity
sensors with 4 measurable variables (temperature / humidity / dew point / mix-
ture ratio) or for function channels. Each sensor can if necessary be pro-
grammed with several measuring ranges or scaling settings;
2 or 3 sensors, if pin assignment so permits, can be combined in a single plug
(e.g. RH / NTC, mV / V, mA / V, etc.). The additional measuring channel num-
bers per plug go up in steps of 10 (e.g. the first sensor has channels M0, M10,
M20, M30, the second sensor has channels M1, M11, M21, M31 etc.).
Device-internal channels:
The 2470-1SRH and 2470-2/2S incorporate 4 additional channels M4, M14,
® sensor can be connected to input sockets M0 / M1 (1)
Manual includes detailed descriptions of the comprehensive
® 2470 series with the optional seal (OA 2479-IP) new spe-
®
® instruments (see Manual, Chapter
® plug usually have the measuring
® sensors can, if necessary, provide up to 4
ALMEMO
Data buffering
plug.
® plugs incor-
® 2470 17