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Hi Amanda,<br>
thanks a lot for running this test. Based on this I agree that using
the analogue card with the FT chilled is not an option.<br>
Before going for the Bira box, Another possibility would be to try
the digital modules<br>
<ul>
<li> LRZ 915 (3 programmable inputs and 3 programmable outputs)<br>
</li>
<li> LRZ 914 (1 programmable inputs and 1 programmable outputs)</li>
</ul>
Both of these allows to send the chiller in standby mode and were
suggested by the Lauda representative for our purposes.<br>
If you think it is worth trying, we will arrange to purchase the
module that you find more suitable,<br>
Best regards,<br>
Raffaella<br>
<br>
<div class="moz-cite-prefix">Amanda Hoebel wrote:<br>
</div>
<blockquote type="cite"
cite="mid:992981353.3765693.1502896386110.JavaMail.zimbra@jlab.org">
<pre wrap="">Hi Raffaella,
Brian and I installed and tested the analog card in the spare SVT Lauda chiller. When analog input was enabled and no signal was given to the card, the pump power dropped to 1. A pump power of 1 appears to be the lowest level that the SVT chiller pump can be set to. The FT chiller allowed for a pump power of 0 to put the pump into standby mode, which is a feature the SVT chiller does not seem to have. When the pump power was dropped to the lowest level, the temperature did not vary.
It looks like something went wrong with the FT chiller itself to cause the card to no longer work properly. We recommend using the BiRa box with the hardware interlocks. Please let us know what you would like to do.
Regards,
Amanda
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</blockquote>
<br>
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