Ahlborn ALMEMO 2490-1A, Руководство по эксплуатации

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10.
MEASURING OPERATIONS
With measuring instrument ALMEMO ® 2490A all available measuring channels
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).
10.1
Measured value
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.
10.1.1
Selecting a measuring
point
By pressing key
M ▲
you can select one after the other all active measuring
points and have the current measured value displayed for each. By pressing
key
M ▼
you can return to the previous channel.
To increment the measuring channel press key :
M ▲
To decrement the measuring channel press :
M ▼
When switching between channels the abbreviation for the measuring range is
briefly displayed; (see 10.1.2).
10.1.2
Measuring ranges
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 Sensor / con-
nector Measuring range Units Abbre-
viation
Pt100-1 FP Axxx -200.0... +850.0
°C P104
Pt100-2
FP Axxx -200.00...+400.00
°C P204
Ni100 ZA 9030-FS3 -60.0... +240.0
°C N104
NiCr-Ni (K) FT Axxx -200.0...+1370.0
°C NiCr
NiCroSil-NiSil (N) ZA 9020-FSN -200.0...+1300.0
°C NiSi