Ion Science Hydrosteel 7000 - Manual (Page 9)

Hydrosteel 7000 MANUAL Ion Science Ltd
Page 9 of 43
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Introduction to Hydrosteel 7000
Operation Cycle
Hydrosteel 7000 operates a 10 minute measurement cycle. At the end of each cycle, 4-20 mA outputs step
change to provide the most recent cycle data measurement, and store all data and diagnostic measurements
to the internal memory. The unit draws a controlled flow of sample gas from the probe into the unit, where
the concentration of hydrogen gas in the sample is measured. The instrument sequentially measures
hydrogen in sample gas drawn from the background probe (~3 minutes) and flux probe (~3 minutes). From
the differential response, the flux is calculated and data outputs are updated. The rest of the cycle (~4
minutes) is dedicated to clear down for a zero measurement and diagnostic measurements, as summarised
below.
Time Operation
0 to 3 minutes Hydrogen zero measurement
3 to 6 minutes Hydrogen background reading
6 to 9 minutes Hydrogen flux reading
9 to 9.5 minutes Hydrogen sensor diagnostics
9.5 to 10 minutes Data stored in memory & 4-20mA outputs updated
Connectivity

1 mains power supply 15-24 V @ 34 mA in hazardous area

4-20 mA output #1: hydrogen flux requiring loop power of 8-30 V @20 mA

4-20 mA output #2: pipe temperature requiring loop power of 8-30 V @20 mA

RS232 connection for optional interrogation of unit: all data is logged to the unit’s internal memory
probe connection.