7.1.4 Atmospheric Pressure Compensation
Some measuring variables depend on the environmental atmospheric pressure
(see 6.2 measuring range list ´w. PC´) so that corresponding measuring errors
will occur in case of larger deviations from the normal pressure 1013 mbar:
For example, error per 100 mbar: Rel. humidity, psychrometer, approx. 2%
Dynamic pressure,
approx. 5%
O
2
saturation, approx. 10%
Therefore, the atmospheric pressure should be considered (approx.
-11mb/100m over mean sea level, MSL) especially during use in a
corresponding height above sea level. It can either be programmed or
measured with a sensor (see manual 6.7.2).
Function ATMOSPHERIC PRESSURE:
PROGRAM
key:
FUNCTION
Atm.Press. 1013mb
With each reset the atmospheric pressure is set to 1013mb. It can be set to the
actual value by the usual data entry (see 5.4).
7.2 Measuring Point Scans
(see also manual 6.5)
Measuring point scans can be used to acquire, indicate and, in most cases, to
document data from the selected measuring point and also from other
measuring points. During a measuring point scan the measuring inputs of the
active measuring points are, via photovoltaic relays and with the conversion
rate, switched to the measuring circuit. The measured values are acquired,
monitored with regard to an exceeding of limit values and successively
indicated in the display for 1.5 seconds. Furthermore, the maximum and
minimum values are updated.
7.2.1 Single Measuring Point Scan
Single measuring point scans for acquiring the momentary measuring values
of all active measuring points are triggered by the key
MANUAL
.
Single measuring point scan:
key:
ALL
MANUAL
During the display of the measured value the control lamp
MEAS.CYCLE
will
be on and then will turn off again. If the time was set to zero before, it will be
started. When a peripheral device is connected (e.g. printer) and the output
channel is activated (s. 7.2.2) the measured values will be one time provided
via the interface and the control lamp
OUTPUT CYCLE
will be on. If all
measured values also need to be stored, the memory must be activated
(s.7.4.1). If this is the case, the control lamp
MEMORY
will switch on during
ALMEMO
®
5590-2
34
Measuring Point Scans
Summary of Contents for Almemo 5590-2 V5
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Page 55: ...ALMEMO 5590 2 54 Notes...
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