| Date |
Time (24h) |
Guard (V) |
Sense (V) |
Field (V) |
Sense ([math]\mu[/math]A) |
Field ([math]\mu[/math]A) |
comments
|
| 04/08/13 |
12:27 |
536 |
1100 |
-750 |
|
|
Tripped (trip is set to 10 [math]\mu[/math]A). Initially settled around 4-5 [math]\mu[/math]A.
|
| 04/08/13 |
12:36 |
536 |
950 |
-750 |
|
|
Tripped
|
| 04/08/13 |
12:40 |
536 |
850 |
-750 |
|
|
Fluctuating from 1.5-3.0 [math]\mu[/math]A on both sense and field.
|
| 04/08/13 |
13:32 |
536 |
850 |
-750 |
|
|
Tripped
|
| 04/08/13 |
13:40 |
536 |
800 |
-750 |
|
|
Set trip threshold to 15 [math]\mu[/math]A. Current tripped within 5 minutes.
|
| 04/08/13 |
13:45 |
536 |
750 |
-750 |
|
|
Sense/field fluctuating around 1.5 [math]\mu[/math]A.
|
| 04/08/13 |
14:40 |
536 |
750 |
-750 |
2 |
2 |
HV found in tripped state, set Imax to 100 [math]\mu[/math]A, and restored HV.
|
| 04/09/13 |
07:34 |
536 |
750 |
-750 |
0.1 |
0 |
|
| 04/09/13 |
07:35 |
536 |
800 |
-750 |
0.1 |
0 |
|
| 04/09/13 |
07:35 |
536 |
900 |
-750 |
0.2 |
0.3 |
|
| 04/09/13 |
07:37 |
536 |
1000 |
-750 |
1.5 |
1.6 |
|
| 04/09/13 |
07:37 |
536 |
1050 |
-750 |
6.2 |
6.3 |
|
| 04/09/13 |
10:12 |
536 |
900 |
-750 |
5 |
4 |
Found HV in tripped state, restored sense to 900 instead of 1050, it first tripped when attempting 900 Volts but staged 50 volts increases brought it back without tripping, I observe 30[math] \mu[/math]A spikes at 900 Volts
|
| 04/09/13 |
11:00 |
536 |
890 |
-750 |
0.1 |
0 |
Found HV in tripped state, set HV to 890 any further and 30 [math]\mu[/math]A current spikes occurr, changed trip time from 0.1 to 1.1 sec
|
| 04/09/13 |
13:11 |
536 |
900 |
-750 |
0.1 |
0 |
current is jumping more
|
| 04/09/13 |
13:11 |
536 |
890 |
-750 |
0.1 |
0 |
found HV in tripped state, went back to 890
|
| 04/09/13 |
17:22 |
536 |
890 |
-750 |
0.05 |
0.00 |
|
| 04/09/13 |
17:30 |
536 |
970 |
-750 |
1.3 |
1.2 |
Changed voltage in steps of 10V at a time. Changed ramp rate to 1V/s on sense. Observed some surge currents after voltage stabilized at around 30 - 40 [math]\mu[/math]A for a few seconds.
|
| 04/10/13 |
07:40 |
536 |
970 |
-750 |
0.115 |
0.005 |
Found fields in tripped state, but not sense or guard. Turned on again, current was relatively low.
|
| 04/10/13 |
07:50 |
536 |
1080 |
-750 |
1.1 |
1.0 |
Went up in voltage in 10V increments at 1V/s ramp, monitoring change in average current at each step after voltage settled. Last increment to 1080 saw some surge currents up to 30 [math]\mu[/math]A, but average current is around 1 [math]\mu[/math]A.
|
| 04/10/13 |
10:40 |
536 |
1070 |
-750 |
0.2 |
0.3 |
Found fields in tripped state. Set sense to lower voltage and reset field voltage.
|
| 04/10/13 |
10:42 |
536 |
1070 |
-750 |
1.3 |
1.4 |
Tried turning voltage on sense up to 1080, current and voltage started fluctuating more than usual. Turned voltage back to 1070. Current is still a little higher than when initially started up again at 10:40, fluctuating from 1 to 4 [math]\mu[/math]A.
|
| 04/10/13 |
11:04 |
536 |
1050 |
-750 |
1.3 |
1.4 |
Found Field & Sense HV in tripped state, set Sense HV to 1050 current becomes non zero after a sense wire Voltage of 1000 VOlts
|
| 04/10/13 |
11:25 |
536 |
1050 |
-750 |
0.2 |
0.3 |
tried to increased to 1060 since current fluctuations were small and below 0.2 [math]\mu[/math]A, both sense & FIled tripped so returned to 1050 sense wire voltage setting
|
| 04/10/13 |
12:30 |
536 |
1050 |
-750 |
0.2 |
0.3 |
|
| 04/10/13 |
13:45 |
536 |
1070 |
-750 |
0.15 |
0.25 |
Current instability was observed when taking voltage up to 1075. Backed off to 1040, current stabilized to less than 0.01 [math]\mu[/math]A. Raised back up to 1070V again, current appears stable for the moment.
|
| 04/10/13 |
15:15 |
536 |
1070 |
-750 |
0.065 |
0.115 |
|
| 04/11/13 |
08:30 |
536 |
1120 |
-750 |
0.065 |
0.115 |
Currently raising voltage only 1-3 volts at a time and monitoring sense current for a few seconds before raising again. If sense current stays above 0.075 for more than a few seconds, run-away current instability will usually start-up again.
|
| 04/11/13 |
10:32 |
536 |
1130 |
-750 |
0.080 |
0.170 |
|
| 04/11/13 |
11:25 |
536 |
1130 |
-750 |
0.080 |
0.170 |
HV tripped at about this time
|
| 04/11/13 |
11:25 |
536 |
1120 |
-750 |
0.080 |
0.170 |
|
| 04/15/13 |
07:34 |
536 |
1068 |
-750 |
0.080 |
0.170 |
Left it this way over the weekend
|
| 04/15/13 |
07:40 |
536 |
1110 |
-750 |
0.000 |
0.080 |
|
| 04/15/13 |
08:40 |
536 |
1130 |
-750 |
0.000 |
0.090 |
|
| 04/15/13 |
09:08 |
536 |
1140 |
-750 |
0.000 |
0.090 |
|
| 04/15/13 |
10:05 |
536 |
1150 |
-750 |
0.000 |
0.090 |
|
| 04/15/13 |
10:35 |
536 |
1150 |
-750 |
0.005 |
0.100 |
|
| 04/15/13 |
12:50 |
536 |
1160 |
-750 |
0.015 |
0.10 |
|
| 04/15/13 |
15:27 |
536 |
1170 |
-750 |
0.020 |
0.12 |
|
| 04/16/13 |
07:39 |
536 |
1195 |
-750 |
0.005 |
0.100 |
|
| 04/16/13 |
08:56 |
536 |
1195 |
-750 |
0.01 |
0.100 |
|
| 04/16/13 |
13:37 |
536 |
1195 |
-750 |
0.00 |
0.090 |
|
| 04/16/13 |
13:40 |
536 |
1205 |
-750 |
0.005 |
0.100 |
|
| 04/16/13 |
16:50 |
536 |
1205 |
-750 |
5.0 |
5.1 |
Current is fluctuating around 5, but not entirely stable. No observed large spikes above 6.
|
| 04/17/13 |
07:35 |
536 |
1205 |
-750 |
0 |
0 |
found in tripped state.
|
| 04/17/13 |
07:35 |
536 |
1020 |
-750 |
3 |
3 |
during rise to 1175 V, current appeared unstable so I backed off to 1020V where it oscillated between 3 and <1. Letting it settle here before ramping back up to 1205.
|