Changes between Initial Version and Version 1 of PMT_HV_Test_Software

Timestamp:

Nov 8, 2013, 10:17:53 AM (10 years ago)

Author:

Eric Hazen

Comment:

--

PMT_HV_Test_Software

@@ +1 @@
+This page documents an automated test setup for evaluation of prototypes.
+
+=== Long-Term Stability Test ===
+
+This is a simple test to verify the long-term stability of the HV generator and feedback circuit.  The plan is to connect the HV monitor output to a high-precision volt meter to measure the DC stability, and to a digital oscilloscope to check for AC transients.
+
+''''Code Outline'''
+
+* Initialize GPIB interface and instruments
+ * Volt meter:  disable internal trigger, set to maximum resolution
+ * Oscilloscope:  Set to AC coupling, maximum input gain, segmented readout of 1k sample waveforms, AC trigger with low threshold
+* Every 1 second:
+ * Take AC and DC voltage readings with meter
+ * Poll oscilloscope for number of triggers and readout if necessary
+* Every minute
+ * Trigger oscilloscope by software and readout
+
+''''Equipment'''
+
+* [http://ohm.bu.edu/~hazen/DataSheets/HP/HP3748A.pdf HP 3748A]
+* LeCroy WaveRunner LT584 Oscilloscope ([http://ohm.bu.edu/~hazen/DataSheets/LeCroy/WR2_RCM_RevB.pdf Programming Manual]
+ * [[LT584_Programming_Notes]]
+* [http://prologix.biz/ GPIB Ethernet Interface]
+
+''''GPIB Interface'''
+
+This device provides access to the GPIB (aka IEEE-488) bus used by many instruments for remote control.  See 
+[http://prologix.biz/getfile?attachment_id=1 users manual]
+128.197.43.84 (freud.bu.edu).  See sample program 
+[http://ohm.bu.edu/~hazen/LBNE/software/volt_meter.c volt_meter.c]
+download to a linux machine (i.e. ohm):
+
+{{{
+  $ wget http://ohm.bu.edu/~hazen/LBNE/software/volt_meter.c
+  $ make volt_meter
+  cc     volt_meter.c   -o volt_meter
+  $ ./volt_meter 128.197.43.84
+  Voltage: +05.1110E+0
+  Voltage: +05.1110E+0
+    ...
+  $
+
+}}}