7.1.9 Temperature Compensation
Sensors with measured values that are strongly depending on the temperature
of the measuring medium are, in most cases, equipped with a specific
temperature sensor and the instrument will automatically perform a
temperature compensation (see measuring range list 6.2 ´w. TC´). However,
dynamic pressure probes and pH probes are also available without a
temperature sensor. If the temperature of the medium deviates from 25°C the
following measuring errors must be considered:
Examples, error per 10°C: Compensation Range: Sensor:
Dyn. pressure:ca. 1.6% -50 to 700 °C NiCr-Ni
pH probe: ca. 3.3% 0 to 100 °C Ntc or Pt100
The temperature compensation can also be performed with external
temperature sensors by using the reference channel, or within the function ´TC´
by entering the temperature manually:
Function TEMPERATURE COMPENSATION ´TC´
Selection with key ... Input °C, see 5.4
F2
1: 1 8 0.0 TC
Display when autom. temp. compensation is selected:
1: A u t o TC
7.2 Single Measuring Point Scan (see manual 6.5.1.1)
Measuring point scans can be used to acquire, indicate and, in most cases, to
document data from the selected meas. point and also from other meas. points.
If an interface module is connected to socket A1 the functions PRINT CYCLE
´PC´, TIME ´TM´ and DATE ´DA´ will be automatically activated under key F1 and
BAUD RATE ´BR´ under key F2. As long as no cycle has been programmed
(e.g. after a reinitialisation, s. 3.3) the key START/
STOP triggers single measuring
point scans to acquire the momentary measuring values from all active
measuring points. These values are sequentially indicated in the display for
approx. 1.5 sec while the arrow ´START´ is on and then disappears again. The
time is started if it has been previously cleared. If a peripheral device (e.g. a
printer) is connected (see man. 5.2) the measured values are provided one
time as an output via interface (printout s. man. 6.6.1) and the arrow ´COM´ also
appears in addition. With the option S the measured values are stored and the
arrow ´MEM´ will be on. With each press of the key the measured values are
equally processed. If true time has to be indicated as measuring time, it must
be set beforehand (see 7.3.2).
Single meas. point scan: Key:
(Cycles 00:00:00)
START/STOP
36 ALMEMO
2290-4
Single Measuring Point Scan
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