wtw LF 538 User Manual

Technische Daten Technical data
40
BA51101/11.95/Pro/LF538-1
BA51101/11.95/Pro/LF538-1
41
Energieversorgung Steckernetzgerät
230 VAC: Friwo FW1199/11.7864,
Friwo Part. No. 1762613
120 VAC: Friwo FW1199/11.7880,
Friwo Part. No. 1794043
Datenerhalt und Betriebsarten bei Netzausfall
Einstellungen und Meßwerte bleiben gespeichert.
Gehäuse
Dimension / Gewicht 240 x 220 x 110 mm / ungefähr 1,5 kg
Gerätesicherheit
Schutzklasse
Schutzart
IEC 1010 / Klasse 3
IEC 529 / IP 54
Measuring 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 measuring range with cell constant
0.1 cm
-1
:
Range Resolution
0.00 ... 19.99 µS/cm 0.01 µS/cm
Accuracy:
(Temp. of test sample
= T
REF)
± 0.5 % of measured value ± 1 digit at operating
temperature -10 ... +55°C
Cell constant Setting ranges: 0.1 cm
-1
fixed
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 fixed.
3. No compensation.
Accuracy:
(at operation temp.
-10°C ... +55°C)
1. Linear compensation (
):
0.5 % of measured value
± 1 digit for
TC:
α = 0.5 ... 2.5 %/K and test sample
temperature +5°C ... 75°C and
TC:
α = 2.5 ... 3.00 %/K and test sample
temperature 10°C ... 75°C.
2. Non-linear compensation (
):
0.5 % of measured 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 measured value
± 1 digit for test
sample temperature -5 ... +99.9°C.

wtw LF 538 Specifications

General

Brand	wtw
Model	LF 538
Category	Measuring Instruments
Language	English