AnsweredAssumed Answered

vrf DMM 34401A High speed read

Question asked by mstrutt on Jun 17, 2003

Like • Show 0 Likes0
Comment • 3

To All the high speed capture >500 samples per second is now working
Many Thanks to all that replied Les and Christian

I had a reply from delmar_fryd

AUTOZERO OFF
AUTORANGE OFF (i.e. fixed range to whatever you need)
Aperture 0.02 PLC
MATH Functions OFF
Resolution could be 0.5mV if you use the 10V range (i.e. not too many
digits)
TRIG:COUN 500 (and no trigger delay)
READ? (REAL ARRAY 1D, 500)

this works a treat

Many Thanks Mike

-----Original Message-----
From: Les Hammer [mailto:Les.Hammer@CompleteTest.com]
Sent: 17 June 2003 16:19
To: VEE vrf
Subject: [vrf] re: DMM 34401A High speed read

> The multimeter incorporates an automatic zero measurement procedure
> (autozero) to eliminate internal thermal EMF and bias current errors.

Yes. Turning Autozero off will increase the speed of measurement.
Also, set the meter for auto range off and minimum resolution.
Instead of getting one reading at a time, get an array of readings.
Get the array in binary format instead of ASCII.

Les Hammer

---
You are currently subscribed to vrf as: MStrutt@tycoelectronics.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".

If you need help with the mailing list send a message to
"owner-vrf@it.lists.it.agilent.com".

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".

No one else has this question

Outcomes

mstrutt Jun 16, 2003 2:52 AM

Looking through the DMM user manual it states you can get 900 reads a second
over the IEEE bus.
I am trying to sample a 30 Hz waveform looking at the floating DC component
I cant seem to get it going faster than 100 samples per sec using display
off no delay etc.

Question.
1. has anybody read at high speed
2.I have tried to configure the system to take multiple samples
SAMPle:COUNt {<value>|MINimum|MAXimum}
Set the number of readings (samples) the multimeter takes per trigger.
Select
from 1 to 50,000 readings per trigger. MIN = 1. MAX = 50,000. [Stored in
volatile memory]
4
The manual states it can only take 512 readings, but I cant get it to take a
sampled readings.

Anybody have some code examples for this??
I have already spent too long on this!!!

Thanks Mike

          \\////
         -(o!o)-
-ooO--(_)--Ooo----------
| Phone DDI +44 (0) 1908 574238
| Phone (operator) +44 (0) 1908 574200
| Fax     +44 (0) 1908 574300
| mstrutt@tycoelectronics.com     l
| Wireless Automotive Principal Test Engineer
|
|     oooO
|     (    )     Oooo
*---   (-----(    )-------------
        \_)     ) /
                ( /

Tyco Electronics UK Limited M/A-COM Division
A tyco INTERNATIONAL COMPANY
Featherstone Road
Milton Keynes
Wolverton Mill
MK12 5EW

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".

Actions

VRFuser Jun 16, 2003 12:04 PM

Mike,

I haven't programmed that box myself, but a quick glance at the
manual on page 213 says...

Making High-Speed DC and Resistance Measurements
------------------------------------------------
The multimeter incorporates an automatic zero measurement procedure
(autozero) to eliminate internal thermal EMF and bias current errors.
Each measurement actually consists of a measurement of the input
terminals followed by a measurement of the internal offset voltage.
The internal offset voltage error is subtracted from the input for improved
accuracy. This compensates for offset voltage changes due to temperature.
For maximum reading speed, turn autozero off. This will more than double
your reading speeds for dc voltage, resistance, and dc current functions.
Autozero does not apply to other measurement functions.

Don't know if you saw this or not.

Mike Groves

-----Original Message-----
From: Strutt, Michael [mailto:MStrutt@tycoelectronics.com]
Sent: Monday, June 16, 2003 8:53 AM
To: VEE vrf
Subject: [vrf] DMM 34401A High speed read

Looking through the DMM user manual it states you can get 900 reads a second
over the IEEE bus.
I am trying to sample a 30 Hz waveform looking at the floating DC component
I cant seem to get it going faster than 100 samples per sec using display
off no delay etc.

Question.
1. has anybody read at high speed
2.I have tried to configure the system to take multiple samples
SAMPle:COUNt {<value>|MINimum|MAXimum}
Set the number of readings (samples) the multimeter takes per trigger.
Select
from 1 to 50,000 readings per trigger. MIN = 1. MAX = 50,000. [Stored in
volatile memory]
4
The manual states it can only take 512 readings, but I cant get it to take a
sampled readings.

Anybody have some code examples for this??
I have already spent too long on this!!!

Thanks Mike

          \\////
         -(o!o)-
-ooO--(_)--Ooo----------
| Phone DDI +44 (0) 1908 574238
| Phone (operator) +44 (0) 1908 574200
| Fax     +44 (0) 1908 574300
| mstrutt@tycoelectronics.com     l
| Wireless Automotive Principal Test Engineer
|
|     oooO
|     (    )     Oooo
*---   (-----(    )-------------
        \_)     ) /
                ( /

Tyco Electronics UK Limited M/A-COM Division
A tyco INTERNATIONAL COMPANY
Featherstone Road
Milton Keynes
Wolverton Mill
MK12 5EW

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".

Actions

VRFuser Jun 16, 2003 6:19 PM

> The multimeter incorporates an automatic zero measurement procedure
> (autozero) to eliminate internal thermal EMF and bias current errors.

Yes. Turning Autozero off will increase the speed of measurement.
Also, set the meter for auto range off and minimum resolution.
Instead of getting one reading at a time, get an array of readings.
Get the array in binary format instead of ASCII.

Les Hammer

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".

Actions

3 Replies

mstrutt Jun 16, 2003 2:52 AM
Mark Correct
Correct Answer
Looking through the DMM user manual it states you can get 900 reads a second
over the IEEE bus.
I am trying to sample a 30 Hz waveform looking at the floating DC component
I cant seem to get it going faster than 100 samples per sec using display
off no delay etc.

Question.
1. has anybody read at high speed
2.I have tried to configure the system to take multiple samples
SAMPle:COUNt {<value>|MINimum|MAXimum}
Set the number of readings (samples) the multimeter takes per trigger.
Select
from 1 to 50,000 readings per trigger. MIN = 1. MAX = 50,000. [Stored in
volatile memory]
4
The manual states it can only take 512 readings, but I cant get it to take a
sampled readings.

Anybody have some code examples for this??
I have already spent too long on this!!!

Thanks Mike

          \\////
         -(o!o)-
-ooO--(_)--Ooo----------
| Phone DDI +44 (0) 1908 574238
| Phone (operator) +44 (0) 1908 574200
| Fax     +44 (0) 1908 574300
| mstrutt@tycoelectronics.com     l
| Wireless Automotive Principal Test Engineer
|
|     oooO
|     (    )     Oooo
*---   (-----(    )-------------
        \_)     ) /
                ( /

Tyco Electronics UK Limited M/A-COM Division
A tyco INTERNATIONAL COMPANY
Featherstone Road
Milton Keynes
Wolverton Mill
MK12 5EW

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
Like • Show 0 Likes0
Actions
VRFuser Jun 16, 2003 12:04 PM
Mark Correct
Correct Answer
Mike,

I haven't programmed that box myself, but a quick glance at the
manual on page 213 says...

Making High-Speed DC and Resistance Measurements
------------------------------------------------
The multimeter incorporates an automatic zero measurement procedure
(autozero) to eliminate internal thermal EMF and bias current errors.
Each measurement actually consists of a measurement of the input
terminals followed by a measurement of the internal offset voltage.
The internal offset voltage error is subtracted from the input for improved
accuracy. This compensates for offset voltage changes due to temperature.
For maximum reading speed, turn autozero off. This will more than double
your reading speeds for dc voltage, resistance, and dc current functions.
Autozero does not apply to other measurement functions.

Don't know if you saw this or not.

Mike Groves

-----Original Message-----
From: Strutt, Michael [mailto:MStrutt@tycoelectronics.com]
Sent: Monday, June 16, 2003 8:53 AM
To: VEE vrf
Subject: [vrf] DMM 34401A High speed read

Looking through the DMM user manual it states you can get 900 reads a second
over the IEEE bus.
I am trying to sample a 30 Hz waveform looking at the floating DC component
I cant seem to get it going faster than 100 samples per sec using display
off no delay etc.

Question.
1. has anybody read at high speed
2.I have tried to configure the system to take multiple samples
SAMPle:COUNt {<value>|MINimum|MAXimum}
Set the number of readings (samples) the multimeter takes per trigger.
Select
from 1 to 50,000 readings per trigger. MIN = 1. MAX = 50,000. [Stored in
volatile memory]
4
The manual states it can only take 512 readings, but I cant get it to take a
sampled readings.

Anybody have some code examples for this??
I have already spent too long on this!!!

Thanks Mike

          \\////
         -(o!o)-
-ooO--(_)--Ooo----------
| Phone DDI +44 (0) 1908 574238
| Phone (operator) +44 (0) 1908 574200
| Fax     +44 (0) 1908 574300
| mstrutt@tycoelectronics.com     l
| Wireless Automotive Principal Test Engineer
|
|     oooO
|     (    )     Oooo
*---   (-----(    )-------------
        \_)     ) /
                ( /

Tyco Electronics UK Limited M/A-COM Division
A tyco INTERNATIONAL COMPANY
Featherstone Road
Milton Keynes
Wolverton Mill
MK12 5EW

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
Like • Show 0 Likes0
Actions
VRFuser Jun 16, 2003 6:19 PM
Mark Correct
Correct Answer
> The multimeter incorporates an automatic zero measurement procedure
> (autozero) to eliminate internal thermal EMF and bias current errors.

Yes. Turning Autozero off will increase the speed of measurement.
Also, set the meter for auto range off and minimum resolution.
Instead of getting one reading at a time, get an array of readings.
Get the array in binary format instead of ASCII.

Les Hammer

---
You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@it.lists.it.agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
Like • Show 0 Likes0
Actions

vrf DMM 34401A High speed read

Outcomes

Related Content

Recommended Content