Knick Stratos Pro A401B PH, User Manual

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Specifications
I input (TAN) Current input 0/4 ... 20 mA / 50 Ω for external temperature signal
Start/end of scale Configurable –20 ... 200 °C (-4 ... 392 °F)
Characteristic Linear
Measurement error 1.3) < 1% current value + 0.1 mA
HOLD input Galvanically separated (optocoupler)
Function Switches device to HOLD mode
Switching voltage 0 ... 2 V (AC/DC) HOLD inactive
10 ... 30 V (AC/DC) HOLD active
CONTROL input Galvanically separated (optocoupler)
Function Selecting parameter set A/B or flow measurement
Parameter set A/B Control input 0 ... 2 V (AC/DC)
10 ... 30 V (AC/DC)
Parameter set A
Parameter set B
FLOW Pulse input for flow measurement 0 ... 100 pulses/s
Pulse amplitude 10 ... 30 V DC
Message via 22 mA, alarm contact or limit contacts
Display
00.0 … 99.9 l/h
Output 1 0/4 ... 20 mA, max. 10 V, floating (galv. connected to output 2)
Process variable * pH, ORP or temperature
Characteristic Linear
Overrange * 22 mA in the case of error messages
Output filter * PT
1
filter, time constant 0 ... 120 s
Measurement error
1)
< 0.25 % of current value + 0.025 mA
Start/end of scale * Configurable within selected range
Minimum span pH 2.00 / 200 mV / 20 K / 36 °F