Ion Science Hydrosteel 7000 - Manual (Page 39)

Hydrosteel 7000 MANUAL Ion Science Ltd
Page 39 of 43
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Diagnostics and fault finding
Diagnostics
The diagnostics are saved to the memory with each measurement cycle results. These can be examined by
downloading the logged data. In addition the unit will alarm using the Red LED and 4-20mA outputs. The
table below shows the diagnostic faults and the actions that should be taken:
Diagnostic Flag Red
LED
On
4-20 mA 1
Flux output
3.5 mA
4-20 mA 1
Temp output
3.5 mA
Recommended action
Clock fault
Yes
Clock lost from memory
The data points will be saved sequentially in
the memory log. Reprogram the clock time
and date using the DDP program.
Background flow
fault
Yes Yes
Back Ground Flow incorrect
Check the background probe and sample tube.
In some extreme cases the blockage may be
at the filters inside the HY7K. A pressure decay
test may be instrumental in proving the tubes
are free from blockages. The most common
form of blockage is water. If water has
penetrated that system then the tubes will
need to be blown out with dry air and the
weather protection afforded to the probed will
need to be investigated.
H2 Flow Fault
Yes Yes
Flux Sample Flow incorrect
Check the background probe and sample tube.
In some extreme cases the blockage may be
at the filters inside the HY7K. The most
common form of blockage is water. If water
has penetrated that system then the weather
protection afforded to the probed will need to
be investigated.
Hydrogen
sensor faulty
Yes Yes
Hydrogen sensor faulty
Return HY7K for servicing. The Sensor is not
working reliably
Thermocouple
fault
Yes Yes
Thermocouple open circuit
Check the thermocouple connections and
continuity. Note the pipe temperature recorded
in the data log will be 615
 C as an indication
of this fault.
Temperature
out side
operating range.
Yes Yes
HY7K monitor internal temperature is
less than -40
 C or greater than +50  C.
Investigate the local temperature. If the
instrument is too close to hot equipment then
it should be relocated to a cooler place. If the
ambient temperature is excessively cold then
the HY7K will be situated in a heated location.