I have assembled a simple signal converter to convert 4-20ma to +/-10V in order to test my bargain 4WRPEH proportional valve acquired from Ebay. If this works it would make a good spare for the Mantis. It also means I can keep a look out for other bargains which will hopefully save a bit of the budget!
I will place the unit in a small case tomorrow, with an Hirschmann CM series connector and flying lead to connect to the valve.
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