Transmitter 9135 - pH/redox measurement
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CALIBRATION
Calibration type
- NIST (4,00 ; 6,88 ; 9,22)
- DIN9 (4,00 ; 7,00 ; 9,00)
- DIN10(4,00 ; 7,00 ; 10,00)
- 2 points (manual)
- 1 point process
- values (slope and offset)
Slope matching
41 ... 71 mV to 25°C
70 ... 120 %
Zero matching
± 3 pH
± 250 mV
Temperature calibration
- 50°C...+20°C
(- 90°F...+ 36°F)
CONTROLLER
Setpoint
programmable in the range 0...14 pH or -1500 mV
... +1500 mV
Neutral zone
programmable from 0...3 pH or 0...200 mV symetric
around the regulating point
Proportional band
programmable from 0...500%
Periodicity
programmable from 3 to 60 seconds (impulse
control) or from 1 to 30 seconds (frequency control)
Controller output
2 isolated contacts S1 and S2
S1 : base injection
S2 : acid injection
Automatic/manual switch
possible
ANALOGUE OUTPUT
Output signals
2 galvanicly outputs insulated [ ]
Allocation
pH / redox / temperature
Type
0 ... 20 mA
4 ... 20 mA
Maximum load
800 Ω
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