GUILCOR AR004926, Instruction Manual, Page: 44 / 75

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the measured values to different values using a two-point linear
transformation, turn on the User calibration function (
User calibration ).
For example, you can use it for converting current values measured
using the current loop to a different physical quantity or for applying
recalculation to the measured values.
Example of user calibration settings for a sensor with a
current output (4 to 20) mA connected to the current input
of the Multilogger, with a range of the sensor between -30
and +80 °C:
Upper point B: Input value: 20 will be shown as 80
Lower point A: Input value: 4 will be shown as -30
In the next step, set alarms for individual measured quantities. You
can set up to 2 alarms for each measured quantity (
Alarm 1 and
Alarm 2 buttons). Each alarm has to be enabled first ( On/Off ).
Next, select if the alarm occurs upon exceeding or dropping under the
given limit value (
value is greater than / value is lower than ) and enter
this limit. For binary inputs only define the state of the input. Next, you
need to specify the alarm delay (
for the duration of) , which is used for
eliminating short-term exceeding of the limit value. Hysteresis has a
similar function (
Alarm hysteresis ) - it is used to prevent alarm
oscillation when the measured value fluctuates nearby the alarm limit.
We recommend not to set it at zero. We have hereby completed the
setup for alarm occurrence. Now we just need to specify if the alarm
will be indicated optically on the Multilogger (
Optical signalization -
LED ), acoustically ( Activate internal audio signalization ), by the
ALARM OUT output ( Activate ALARM OUT output ) or by submitting a
warning email ( Send email message ... ).
In some application, we want to calculate other values from the
measured ones, and we want to be able to record them and to create
alarm states. The Multilogger allows this by the means of several
simple mathematical operations (difference, linear equation,
multiplication and division). This way, you can, for example, easily
calculate the difference between the surface temperature and the
dew point of the air. Calculated values can be defined on the section
with a list of inputs and measured quantities by clicking on the given
line button
Calculated - Add. Their further settings are specified
similarly to the measured quantities (with the exception of the User
calibration , which cannot be used for the calculated quantities).