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10. MEASURING OPERATIONS
With measuring instrument ALMEMO
are scanned by default semi-continuously; this permits continuous differential
measurements and ensures continuous temperature compensation for dynamic
pressure probes or chemical probes; (see Manual, Section 6.5.1.3).
Up to 4 or 12 measuring channels (type 2) can be displayed; see 8.2-
A measured value can be sent to an analog output; (see 11.2, Manual 5.1.1).
Measured value
10.1
After switching ON first of all a segment test is
performed; then the battery voltage appears
and if the batteries are almost empty (<3.6 V)
the LOBAT arrow also appears.
The measured value is then displayed with the
appropriate units in the main field and the meas-
uring point is displayed in the function field. All
special operating states possible for the meas-
ured value are explained in Section 9.1.
Selecting a measuring
10.1.1
point
By pressing key
points and have the current measured value displayed for each. By pressing
key
you can return to the previous channel.
M▼
To increment the measuring channel press key :
To decrement the measuring channel press :
When switching between channels the abbreviation for the measuring range is
briefly displayed; (see 10.1.2).
Measuring ranges
10.1.2
With each channel switchover or sensor breakage the abbreviation for the
measuring range appears in the display. For identification purposes the follow-
ing table lists all possible measuring ranges.
Transducers
Pt100-1
Pt100-2
Ni100
NiCr-Ni (K)
NiCroSil-NiSil (N)
20
you can select one after the other all active measuring
M▲
Sensor / con-
nector
FP Axxx
FP Axxx
ZA 9030-FS3
FT Axxx
ZA 9020-FSN
2490A all available measuring channels
®
M▲
M▼
Measuring range Units Abbre-
-200.0... +850.0
-200.00...+400.00
-60.0... +240.0
-200.0...+1370.0
-200.0...+1300.0
viation
°C
P104
°C
P204
°C
N104
°C
NiCr
°C
NiSi
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