SENSOR PROGRAMMING
The measuring channels are automatically programmed via the ALMEMO
®
sen-
sor connectors. However, the user can easily supplement or modify this pro-
gramming via the keypad 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 sensors, infrared
sensors, and flow sensors (rotating vanes, thermoanemometers, Pitot tubes).
For humidity sensors additional function channels are available for calculating
humidity variables such as dew point, mixture ratio, vapor pressure, and enthal-
py. Even complex chemical sensors are supported. Measured values from
other sensors can also be acquired using the voltage, current, and resistance
ranges with individual scaling in the connector. Existing sensors can also be
used - so long as the appropriate ALMEMO
®
connector is connected via its
screw terminals. For digital input signals, frequencies, and pulses, adapter
connectors are available with an integrated microcontroller. It is thus possible to
connect virtually any sensor to any ALMEMO
®
measuring instrument and to
change sensors without the need for any extra settings.
Function channels
Maximum, minimum, and average values, differential measured values, volume
flow, and wet bulb globe temperature (WBGT) can be programmed as function
channels and further processed and printed out just like normal measuring
points.
Units
The 2-character units display can be adapted for each measuring channel so
that both the display and the printout always indicate the correct units, e.g.
when a transmitter is connected. Conversion between °C and °F is performed
automatically.
Measured value designation
Each sensor is identified by means of a 10-character alphanumeric name. This
name, entered via the interface, will subsequently appear in the printout or, if
evaluated by computer, on the screen.
Measured value correction
The measured value on each measuring channel can be corrected both in
terms of zero-point and gain; this means that even sensors usually requiring in-
itial adjustment (expansion, force, pH) can be freely interchanged. Zero-point
correction and, partly at least, gain adjustment can be performed at the touch of
a button.
Scaling
The corrected measured value on each measuring channel can also be further
scaled in terms of zero-point and gain - using the base value and factor. The
decimal point position can be set by means of the exponent function. By setting
to zero and entering the nominal value the scaling values can be calculated au-
tomatically.
ALMEMO
2390-5
5
Functions
Содержание ALMEMO 2390-5
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