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14 Redox indicator
14.1 Redox measurement circuit
The JUMO dTRANS Az 01 (1) indicator/controller requires a standard
0(4) — 20 mA input signal that is proportional to the redox voltage.
The 2-wire redox transmitter (2) provides this standard signal.
The metal combination electrode (3) is connected to the 2-wire redox
transmitter (2), which in its turn is connected to the JUMO dTRANS Az 01 (1).
A temperature probe (4) can be connected to the indicator/controller as an
option. This temperature probe can be used to measure the temperature of the
liquid. The dTRANS Az 01 can indicate and control this temperature.
As a further option, the JUMO dTRANS Az can supply the voltage for the
2-wire transmitter.
Example
A combination of:
- (1) JUMO dTRANS Az 01,
(configured as a redox voltage indicator,
rAnG 20
)
- (2) JUMO 202702 (2-wire transmitter for redox)
- (3) metal combination electrode
- (4)
optional temperature probe (Pt100 or Pt1000)
14.2 Calibration
The delivery condition of the electrode is such that generally no calibration of
the transmitter for the electrode parameters is required. Through usage,
however, the electrode parameters may change. To compensate for this, the
indicator/controller can be adjusted to the zero point of the electrode. If a new
electrode is connected to an indicator/controller that has already been
PGM
EXIT
K1
K2
K3
K4
C
(1)
(2)
(3)
(4)
