wtw pH 526 Bedienungsanleitungen Seite 44

Data storage
Display
Keyboard
Inputs
combined electrode or
measuring electrode
temperature sensor
socket for power supply
Outputs
analog output
44
Technical data
Ring memory
Number of values: 50 pairs
Output:
Data protection:
WTW-specific LCD display
height: 35 mm breadth: 60 mm
Field with 10 keys
plug acc. to DIN 19262
WTW plug acc. to IP 66
input resistance: > 1 ⋅ ⋅ 10
< 1 ⋅ ⋅ 10
input current:
4 mm jack
TFK 150 as separated probe or NTC integrated
in pH electrode
Pt 1000 as separated probe or integrated in pH-
electrode
automatic detection of connected probe type
manual temperature input with not connected
temperature (input range: - 20°C ... + 130°C)
2-pin special socket for line adaptor
voltage: 12 V
current: 70 mA
2 x 4 mm jack for recorder,
not galvanically isolated
output signal corresponds to
electrode voltage,
i.e. 50 - 62 mV/pH-unit
Accuracy:
± 0.1 % of measured value ± 4 mV at
ambient temperature -10°C ... +55°C
Internal resistance:
< 5 Ohm (current limit max. 0.2 mA
Display,
RS 232 interface
any long
12
Ohm
-12
A
offset current)