wtw LF 320 - Technical Data

Technische Daten Technical data
34
BA52207/03.95/Pap/LF320-SET-1
BA52207/03.95/Pap/LF320-SET-1
35
Energieversorgung 4 x 1,5 V nicht ladbare Batterien, Typ AA
Laufzeit
(abhängig vom Meßwert)
500 - 2500 Betriebsstunden bei Verwendung von
Alkali/Mangan-Batterien
*
Energieeinsparung durch automatische Abschaltung nach ca. 1 Stunde
Datenerhalt bei Batteriewechsel
Einstellungen und Meßwerte bleiben gespeichert,
Betriebsart bei Start: Leitfähigkeitsmessung.
Gehäuse
Dimension / Gewicht 172 x 80 x 37 mm / ungefähr 0,3 kg
Gerätesicherheit
Schutzklasse
Schutzart
IEC 1010 / Klasse 3
IEC 529 / IP 66
*
: je nach Leitfähigkeits-Bereich.
Meas. modes
Conductivity Range Resolution
0.0 ... 199.9 µS/cm 0.1 µS/cm
0 ... 1999 µS/cm 1 µS/cm
0.00 ... 19.99 mS/cm 0.01 mS/cm
0.0 ... 199.9 mS/cm 0.1 mS/cm
0 ... 500 mS/cm 1 mS/cm
Additional meas. range with cell constant
0.1 cm
-1
:
Range Resolution
0.00 ... 19.99 µS/cm 0.01 µS/cm
Accuracy:
(Temperature of test
sample = T
REF)
± 0.5 % of meas. value ± 1 digit at operating
temperature -10 ... +55°C
Cell constant Setting ranges: 0.1 cm
-1
fix
0.45 ... 1.30 cm
-1
adjustable
Reference temperature 20°C or 25°C selectable.
Temperature compensation
automatically, 3 modes selectable:
1. Linear compensation
,
coefficient adjustable between 0.5 %/K and
3.00 %/K in the range of -5 ... 90°C.
2. Compensation of natural water
acc. to EN 27888 (replaces DIN 38404),
Ultrapure water function for neutral water;
coefficient fix.
3. No compensation.
Accuracy:
(at operation temp.
-10°C ... +55°C)
1. Linear compensation
:
0.5 % of meas. value
± 1 digit for
Ÿ TC: α = 0.5 ... 2.5 %/K and test sample
temperature +5°C ... 75°C and
Ÿ TC: α = 2,5 ... 3.00 %/K and test sample
temperature 10°C ... 75°C.
2. Non-linear compensation
:
0.5 % of meas. value
± 1 digit for test sample
temperature 0 ... 35°C.
For test sample temperature 35 ... 50°C
expanded nLF-function acc. to WTW-
measurements.
3. No compensation:
0.5 % of meas. value
± 1 digit for test sample
temperature -5 ... +99.9°C.