Almemo 2190-2, Руководство по эксплуатации, Страница: 5 / 24

1.1 Function Range
The multimeter ALMEMO ® 2190-2 is a simple measuring instrument with one
measuring input (4 channels at maximum) without an integrated programming
capability. However, it is easily possible to connect any programmed
ALMEMO
® sensor and read the measured values, including the dimension,
from the LCD display. Five keys allow for reading maximum and minimum
values and for freezing or setting the measured value to zero.
An analogue output module can be connected to the output socket as required
and the measured values can, for example, be evaluated using a recorder.
SENSOR PROGRAMMING
The measuring channels are automatically programmed by the ALMEMO
®
sensor connectors. It is not possible to alter the programming using the
instrument ALMEMO
®
2190-2, however, the programming can be changed by
means of any other ALMEMO ® device that is equipped with an interface for
entering data. In any case a programming will be supported without
restrictions.
Measuring Ranges
There are corresponding measuring ranges for sensors with a non-linear
characteristic such as 10 thermocouple types, Ntc and Pt100 sensors, infrared
sensors, and flow sensors (rotating vanes, thermoanemometers, pitot tubes).
Humidity sensors are available with function channels that also calculate
humidity data such as dew point, mixture ratio, vapour pressure and enthalpy.
Even complex chemical sensors can be used. The acquisition of measured
data from other sensors is easily possible by using voltage, current and
resistance ranges with individual scaling in the connector. Existing sensors can
be used without problems. Only the corresponding ALMEMO
®
connector has to
be connected using its terminals. Furthermore, there are adapter connectors
with an own microcontroller for digital signals and for measuring frequencies
and pulses. This way, nearly all sensors can be connected to any ALMEMO
®
measuring instrument and are interchangeable without requiring any settings.
Dimension
With any ALMEMO
®
sensor, two 16-segment elements will always display the
correct physical dimension. The conversion from °C to °F is automatically
performed according to the dimension.
MEASUREMENT
A maximum of 4 measuring channels is available for each sensor, i.e. it is also
possible to evaluate double sensors, sensors with different scaling or sensors
with function channels. The selected measuring point can be scanned with a
conversion rate of 2.5 measurements/second. The measured value is
calculated and indicated on the display or, if available, provided on the
analogue output.
ALMEMO

2190-2 5
Functions