Differences

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--- ea-ps_2084-03b [2015/06/07 19:03] – add picture kingkevin
+++ ea-ps_2084-03b [2015/06/08 10:43] – [power supply] kingkevin
@@ Line 57: / Line 57: @@
 It will set the voltage and current which are set, actual (measured by the power supply), and [[#mutlimeter|measured]] (measured by the DMM)
+Using [[https://git.cuvoodoo.info/kingkevin/ea-ps_2084-03b/blob/master/probe.rb|this script]] I could also find the following undocumented objects (for commands): 80, 81, 82, 83, 84, 85, 86, 87, 88, 149, 150, 151, 152, 156, 158, 160, 161, 162.
+These probably allow you to flash the firmware or calibrate the power supply.
 ===== multimeter =====
@@ Line 78: / Line 80: @@
 Finally I found a FT232-based RS232 to USB converter.
 This is an expensive cable (but good quality), from an evil company, and it worked.
+Here is the schematic of this cable:
+{{:ea-ps_2084-03b:ut-d02.svg?400|}}
 But instead of using it, I decided to connect the cable to a CP2102-based UART to USB converter.
@@ Line 173: / Line 179: @@
 {{:ea-ps_2084-03b:dsc02162-mini.jpg?200|}}
+====== conclusion ======
+pro:
+  * fulfils all initial power supply criteria
+  * **set output is within accuracy**
+  * good design, lay out, quality components
+  * fast first contact response
+contra:
+  * output is not switched of completely
+  * **measured value is up to 0.4 V lower than output voltage**
+  * second digit after . of voltage is always 0 and not settable (it should not be displayed in this case)
+  * second digit after . of voltage is always 0 and does not show measured value (the actual measured data is precise enough to show this digit)
+  * can skip fast knob turns
+  * USB cable does no fit in port because of the indent
+  * information in english programming manual missing
+  * small mistakes in programming manual
+  * can not be calibrated by end user, and vendor only calibrates if under warranty
+  * no contact support