Functions Of The Almemo 710; Sensor Programming - Ahlborn ALMEMO 710 Operating Instructions Manual

Functions of the ALMEMO 710

5.1 Functions of the ALMEMO 710
The ALMEMO ® 710 data logger has 10 electrically isolated measuring inputs -
suitable for all ALMEMO ® sensors. Given the large portfolio of already existing
standard sensors and now the new, innovative D7 sensors measuring possibili-
ties are virtually limitless. The V7 device is operated by means of its 5.7-inch
TFT touchscreen and its 3 touchkeys. The measured value display initially in-
cludes measured value lists, individual values, bar charts, and line graphs - but
this can be adapted via configurable user menus to provide any function re-
quired for any application. The data logger function is implemented with an ex-
tremely accurate real-time clock (2 ppm) and a high-speed 8-MB flash memory
sufficient for over 1.5 million measured values. There are three output sockets
which can be used to connect any ALMEMO output modules, e.g. digital inter-
®
face, analog output, trigger input, memory card, or alarm contacts. Several de-
vices can be networked by simply connecting them via network cables.

5.1.1 Sensor programming

The measuring channels are programmed, completely and automatically, via
the ALMEMO ® plugs. However, the user can easily supplement or modify this
programming as and when necessary via the touchscreen or via the interface.
Measuring ranges
Appropriate measuring ranges are available for all sensors with a non-linear
characteristic, e.g. 10 thermocouple types, NTC and Pt100 probes, infrared
sensors, and flow transducers (rotating vanes, hot-wire thermoanemometers,
Pitot tubes). For humidity sensors additional function channels are available for
calculating humidity variables such as dew point, mixture ratio, vapor pressure,
and enthalpy. Even complex chemical sensors are supported. Measured val-
ues from other sensors can also be acquired using the voltage, current, and re-
sistance ranges with individual scaling in the plug itself. Existing sensors can
also be used - so long as the appropriate ALMEMO® plug is connected via its
screw terminals. For digital input signals, frequencies, and pulses, adapter
plugs are available with an integrated microcontroller. The new autonomous
D7 sensors - not only now but also in the future - herald as yet unimagined
possibilities in data acquisition though digital and analog sensors with all man-
ner of data formats. It will even be possible to control the measuring system.
It is thus possible to connect an increasing range of sensors to the ALMEMO®
V7 measuring instrument and to change sensors without needing to reset.
Function channels
The maximum, minimum, average, and differential values of certain measuring
channels can be programmed as function channels and can be processed and
printed like normal measuring channels. There are also function channels
available for special measuring tasks, e.g. to determine thermal coefficient
Q/ΔT and the wet-bulb globe temperature.
Units
The units display (V5 2 characters, D7 up to 6 characters) can be adapted for
ALMEMO ® 710 11