HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Hopefully HP Voltage "Derated" the Cap as well so it can handle our 250V here..
We are across the road from the main transformer for the area so the voltage is highest at our place, I checked the meter box this morning - it is 255-258V on all 3 phases, no wonder I am having problems.
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Orin Eman
Sent: Sunday, 7 July 2013 2:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
What's the specified tolerance on the 17,000 uF? You probably have quite a range to work within. If you are lucky, they specified something like
+80/-20% and the 29,000 uF might be OK (measure it).
On Sat, Jul 6, 2013 at 4:18 AM, Mark C. Stephens marks@non-stop.com.auwrote:
C3 (17000uf @ 10v) is open circuit.
Where am I going to get one of those from.
I need some advice here, Should I just use modern low ESR solder lug
type soldered directly onto the board?
Or Should I try and locate a screw terminal type Capacitor?
Obviously, I want to do the best for this timer as I rely on it
tremendously.
-marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]
On Behalf Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:47 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons
selecting normally, PB LEDS scannning and appears to be reading o/k
Checked the PSU voltages on the PSU card next to the 10811.
The -5.2 is reading -4.2.
Took a look with the scope and instead of a nice flat DC I see a 4V
Peak to Peak spike @ 100Hz.
Trying to track down a service manual.
Any ideas on this one guys, if the Pass tranny was shorted, it would
be a lot more than 4.2V unless the overvoltage Zener is able to sink
all that current...
-marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]
On Behalf Of Mark C. Stephens
Sent: Saturday, 6 July 2013 8:18 PM
To: time-nuts@febo.com
Subject: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning and appears to be reading o/k
I went to use my 5370B todayt and noticed the LEDS on the display are
slowly sort of pulsing bright one after another.
Also all the push button LEDS are going on and off one by one.
The strangest thing is that it appears to be working o/k via HPIB.
I don't have extender boards but I do have a signature analyser.
Could it be something silly like one of the PSU regulator has gone kaput?
Has anyone seen this issue before?
-marki
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage "Derated" the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases, no wonder I am having
problems.
Is that nominally 240 phase to neutral/ 415 phase to phase. typically,
the utility is allowed 10% tolerance.. I see that wikipedia says AS60038
calls out 230V +10% -6% so that's 253 to 216
One thing to be wary of is that the utility supplies voltages at, say,
120V or 240V (in the US), but utilization equipment (motors, for
instance) is labeled as 115V or 230V. This accounts for the 2% voltage
drop in the branch circuit, among other things.
I just checked the HP manual, most of the linear equipment is specified: 240V +5/-10%
So, I am a little over at 258V here ):
I am going to unplug everything until I can get this sorted out.
Can't afford to lose anything more, in both time and spares obtainability.
marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage "Derated" the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases, no wonder I am having
problems.
Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216
One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for
instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things.
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Check with your power company. They may be able to switch taps on the
transformer to reduce the voltage. I don't know what the situation is
for you, but in some places power companies can be forced to
repair/replace equipment that they fry due to faults in their system.
Ed
On 7/6/2013 5:14 PM, Mark C. Stephens wrote:
I just checked the HP manual, most of the linear equipment is specified: 240V +5/-10%
So, I am a little over at 258V here ):
I am going to unplug everything until I can get this sorted out.
Can't afford to lose anything more, in both time and spares obtainability.
marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage "Derated" the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases, no wonder I am having
problems.
Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216
One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for
instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things.
Yes that is true in Australia, but one has to prove that it is the utility companies fault.
The main problem is we are right across the street for the main transformer for the area.
So, the start of the 240V run for the whole neighbourhood basically.
Our switchbox meter has a voltage function that I checked this morning, the voltage is ~255-258V on all 3 phases.
I will give a call to power Co stating this is not no, but I don't like my chances.
Boo..
-marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Ed Palmer
Sent: Sunday, 7 July 2013 9:29 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
Check with your power company. They may be able to switch taps on the transformer to reduce the voltage. I don't know what the situation is for you, but in some places power companies can be forced to repair/replace equipment that they fry due to faults in their system.
Ed
On 7/6/2013 5:14 PM, Mark C. Stephens wrote:
I just checked the HP manual, most of the linear equipment is specified: 240V +5/-10%
So, I am a little over at 258V here ):
I am going to unplug everything until I can get this sorted out.
Can't afford to lose anything more, in both time and spares obtainability.
marki
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage "Derated" the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases, no wonder I am having
problems.
Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out 230V +10% -6% so that's 253 to 216
One thing to be wary of is that the utility supplies voltages at, say, 120V or 240V (in the US), but utilization equipment (motors, for
instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in the branch circuit, among other things.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.