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 H705 model converter is a transmitter which can be placed in the field
close to the zirconia probe. The converter receives the signals from the
zirconia cell and from the compensation thermocouple which is fitted inside
the probe. The converter can be connected with any model of FER zirconia
probes mod. 4153, which has the compensation thermocouple type B as a standard
or type S as optional.
Based on a microprocessor associated to analogical-digital converter (12 bit)
is equipped of a led display 3½; digit, which shows continuously the
percentage of oxygen in volume and on which is possible, by depressing a push
button, to show the temperature of the compensation thermocouple and the
impedance of the zirconia measuring element.
The converter is equipped with an analogical output 4÷20 mA isolated
linear and proportional to 0-25% ; 0-10% and 0-5% oxygen content. The
three oxygen fields are selectable from the instrument. The electronic
converter, can be optionally equipped with a pump, flow meters for
reference and calibration of the probe, housed in the same strong water
proof metal housing.
Technical specifications
Input: zirconia cell and associated
compensation thermocouple Measuring range: oxygen 0,0÷25% in
volume with probe temperature higher than 550°C compensation thermocouple
type S or B Accuracy of the converter: 1%
on reading with 0.1% vol. minimum error Display: 3 ½; digit Analogical output: 4÷20 mA insulated
linear to an oxygen range of 0.0-25% ; 0.0-10% ; 0.0-5% O2 by volume Fail-safe: if the signal from the
zirconia cell or from the thermocouple fails, the current output will
go to 2 mA Power: 220 Volt 50/60 Hz 50 V.A (110
Volt special) Housing: water proof (IP 55) metal box
IP 55 Dimensions: 300 x 400 x 150 mm Weight: kg 11
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