Dewar temperatures and bias voltages/currents

march,2002

dewar temperatures
dewar bias currents and voltages

Dewar temperatures:

The receiver systems have temperature sensors that measure the physical temperature of the 16 Kelvin, 70 Kelvin, and the OMT stages of the receiver. These temperatures are recorded daily. They are plotted below by year and for the last 5 and 30 days (updated at 5:25 am each day). The color plots overplot all of the receivers on one plot using color to differentiate between the receviers. The black and white plots have a mosaic with 1 plot per receiver (if you don't have a color plotter, then you can make hardcopy with the black and white version). Some receivers do not have the temperature diodes to measure the 70K or the OMT stages. These plots will appear blank. See using idl to plot the dewar temperatures for routines that allow you to plot this data interactively.

plots of dewar temperature verus time
Date	16K stage color	70K stage color	OMT stage color	16K stage black & white	70K stage black & white	OMT stage black & white
last 5 days	16k_last5	70K_last5	omt_last5	16K_last5	70K_last5	omt_last5
last 30 days	16K_last30	70K_last30	omt_last30	16K_last30	70K_last30	omt_last30
2020	16K_2020	70K_2020	omt_2020	16K_2020	70K_2020	omt_2020
2019	16K_2019	70K_2019	omt_2019	16K_2019	70K_2019	omt_2019
2018	16K_2018	70K_2018	omt_2018	16K_2018	70K_2018	omt_2018
2017	16K_2017	70K_2017	omt_2017	16K_2017	70K_2017	omt_2017
2016	16K_2016	70K_2016	omt_2016	16K_2016	70K_2016	omt_2016
2015	16K_2015	70K_2015	omt_2015	16K_2015	70K_2015	omt_2015
2014	16K_2014	70K_2014	omt_2014	16K_2014	70K_2014	omt_2014
2013	16K_2013	70K_2013	omt_2013	16K_2013	70K_2013	omt_2013
2012	16K_2012	70K_2012	omt_2012	16K_2012	70K_2012	omt_2012
2011	16K_2011	70K_2011	omt_2011	16K_2011	70K_2011	omt_2011
2010	16K_2010	70K_2010	omt_2010	16K_2010	70K_2010	omt_2010
2009	16K_2009	70K_2009	omt_2009	16K_2009	70K_2009	omt_2009
2008	16K_2008	70K_2008	omt_2008	16K_2008	70K_2008	omt_2008
2007	16K_2007	70K_2007	omt_2007	16K_2007	70K_2007	omt_2007
2006	16K_2006	70K_2006	omt_2006	16K_2006	70K_2006	omt_2006
2005	16K_2005	70K_2005	omt_2005	16K_2005	70K_2005	omt_2005
2004	16K_2004	70K_2004	omt_2004	16K_2004	70K_2004	omt_2004
2003	16K_2003	70K_2003	omt_2003	16K_2003	70K_2003	omt_2003
2002	16K_2002	70K_2002	omt_2002	16K_2002	70K_2002	omt_2002
2001	16K_2001	70K_2001	omt_2001	16K_2001	70K_2001	omt_2001
2000	16K_2000	70K_2000	omt_2000	16K_2000	70K_2000	omt_2000
1999	16K_1999	70K_1999	omt_1999	16K_1999	70K_1999	omt_1999

Dewar bias voltages and currents

The dewar monitoring system includes monitoring of the bias voltages and currents for each stage of the amplifiers. The data is recorded (all receivers are read about once every 30 seconds) and written to discs. Plots are made daily (at 5:25am) of: the last 5 days, the last 30 days, and the year to date.
The plots contain:

Each receiver has their own set of plots for a time period (5days,30days, yeartodate).
the 5day data has the full time resolution. the 30day and year to date are smoothed to 1 hour resolution.
For each dataset, the bias currents are on the first page and the voltages are on the second page.
On a given page, the stages are plotted in different frames (stage 1 is at the top).
Pol A values are plotted in black. polB is plotted in red.
The vertical scale for each plot is a fixed value. If the trace hits the top, or bottom of the plot then it just means it's the plotted scale.
All plots are pdf files.

Bias Currents and voltages for each receiver
Date	327	430	800	lbw	sbn	sbw	sbh	cb	cbw	cbh	xb
last 5 days	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf			.pdf
last 30 days	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf			.pdf
2020	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf	.pdf		.pdf
2019	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf	.pdf		.pdf
2018	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf	.pdf		.pdf
2017	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf	.pdf	.pdf	.pdf
2016	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf		.pdf	.pdf
2015	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf		.pdf	.pdf
2014	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf		.pdf	.pdf
2013	.pdf	.pdf		.pdf	.pdf	.pdf	.pdf	.pdf		.pdf	.pdf

Notes:

2013

started plotting the bias voltages and currents for all receivers.
26sep-03oct13 . no data

rfi cpu crashed 26sep13.
when restarted, the daynum in file were being recorded incorrectly. Restarted 03oct13. things ok.

2008

08mar04 - cbh now included in plots.

jun09 - cbh dropped, 800Mhz receiver monitored

08aug09 - sbh dropped cbh now monitored

2003

13jan03- lbn dewar warmed up for maintenance. xband 16K stage drops by 5K since now 2 rather than 3 dewars on the compressor.

15jan03- lbn op-amp for tempmonitor conversion I to V added bypass capacitors. Drifting should settle down..

16jan03- xb,sbn,lbn 1 compressor changed to (xb,sbh) (sbn,lbn)

26mar03 - xb,sbn,lbn back to 1 compresso sbh on 1 by itself.

04apr03 - lbn changed diode monitoring circuit to use old diode curve.

07apr03 - changed sbn diode board to use old diode curve..updated software

2002

18feb02 xb - xband moved to share compressor with sbn,lbn. 16K stage jumped a few degrees.

06apr02 lbw- left vacuum pump running on dewar. 70K 120->80K. must be a leak in dewar.

27jun02 lbw - warmed up lbw, regreased seals, added vacion pump (but not on yet), then cooled down.

10jul02 lbw - turned on vacion pump.

17sep02 lbn,xb - sbn no longer on compressor with xb,lbn (down for repairs). xb,lbn temps decreased.

24sep02 lbn,xb,sbn back to being on same compressor.

20dec02 switched to use continous sampling. last5 plots sampled every 22 secs, last_30 plots smoothed to 4 minutes.

processing: x101/dwtemp/dwtemp.pro

 home_~phil