Measuring Operation - Ahlborn ALMEMO 710 Operating Instructions Manual

5. Introduction
each measuring channel in such a way that both the display and the printout al-
ways indicate the correct units, e.g. when a transmitter is connected. Conver-
sion between °C (Centigrade) and °F (Fahrenheit) is performed automatically.
Measured value designation
To help identify sensors an alphanumeric designation is also provided (V5 - 10
characters, D7 - up to 20 characters). This designation appears in each mea-
sured value display, in the printout, or on the computer screen.
Correction of measured values
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
initial adjustment (e.g. expansion, force, pH) can be interchanged freely. Zero-
point correction and, partly at least, gain adjustment can be performed at the
touch of a button.
There is also the possibility of performing multi-point adjustment or user-de-
fined linearization.
Scaling
The corrected measured value on each measuring channel can also be further
scaled in terms of zero-point and gain based on the base value and factor. The
decimal point position can be set by means of the ´Exponent´ function. Scaling
values can be calculated automatically by setting to zero and entering the nom-
inal setpoint or by using the scaling wizard.
Limit values and alarm
Per measuring channel two limit values can be set (1 maximum and 1 mini-
mum). In the event of one of these limit values being infringed an alarm signal
is output and relay output modules actuate the associated alarm contacts;
these can be allocated individually to specific limit values. Hysteresis is set by
default to 10 digits; however, this can be adjusted to any value between 0 and
99 digits. A limit value infringement can also be used to automatically start or
stop measured value recording or via macros to control device functions in any
way required.
Sensor locking
All sensor data stored in the EEPROM in the plug can be protected - by means
of a graduated locking function - against undesired access.

5.1.2 Measuring operation

With standard up to 40 measuring channels are available for 10 sensors; i.e. it
is thus also possible to evaluate double sensors, individually scaled sensors,
and sensors with function channels. All activated default standard channels are
scanned continuously at the conversion rate and the data acquired is shown in
the display. A D7 sensor has up to 10 channels and a sampling rate corre-
sponding to each individual measuring speed; this sampling rate can be ap-
plied individually over the new scan cycle.
Measured values
All measured values can be shown in the display in various configurable
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