Measurement of CJC for 1 of 3 SCC-TC modules

There are multiple SCC modules (> 9) being monitored of various signal types. Is it possible to read the cjc on a t/c/ module along with the other signals in the SC-2345 box

Thanks for the reply Brett"
I agree and understand your response for the t/c measurement
One aspect that I was looking at was the ability to monitor the following configuration effectively:
SCC t/c module in J1 and use J8 for CJC
SCC 1V analog module in J2
SCC 5V analog module in J9
Would this work by acquiring a config of ch 0 for t/c, ch 8 for cjc, ch 1 for V, and ch 9 for V?
Or does it have to go ch's 0,1,8,9
Thanks,

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Can I measure 2 differential channels on a single SCC-SG24?

I am trying to use a single SCC-SG24 module to excite and measure the
output of 2 pressure transducers. The module is installed in the
ACh2 position of an SC-2345 carrier. When I configure the module
through 'custom voltage with excitation' in MAX, I can set the terminal
configuration of ai2 to differential. However, the other channel of the
module, ai10, can only be set to RSE or NRSE; the other options are
greyed out. I want both channels to be set to differential. Can I
configure the SCC-SG24 to measure 2 differential channels on a single
SCC-SG24? Thanks.

Hi,
I did a little looking into the DataSheet
for SCC Modules, and I found the following schematic.
As you can see there 2 instrumentation amplifiers that make it to where your measurements
are really differential, and then mapped to the NRSE lines in the
SC-2345. If you were to set up the DAQ board for differential it would
simply read the difference between one pressure transducer and the next.
Long story short, you set up the DAQ board for NRSE for all of the channels,
the SCC-SG24 makes it to where you are really taking a differential
measurement. Everything works quite simply in the end.
Regards,
Message Edited by Otis on 10-11-2005 12:56 PM
Otis
Training and Certification
Product Support Engineer
National Instruments
Attachments:
728815-SCC-SG24_Channels.GIF ‏10 KB

CJC for Multiple SCXI Modules

I am setting up an SCXI signal conditioning system to measure 20 thermocouples using three 1320's and three 1120's in one SCXI-1000. When using MAX (setup as one task), I have a couple of questions:
1. Is there any special or unique ways I have to setup MAX because I have multiple modules or does setting the "CJC Source" to "Built In" work correctly?
2. Which CJC of the three 1320's does max use for each channel?
3. What should the 1320 jumper be set to (MTEMP or DTEMP)? Assume I am in multiplex mode.
Thank you in advanced for your support.
Dan Young

Hi Youngds01:
I would like to point you to this KB How Can I Address and Use Cold Junction Compensation (CJC) with SCXI Modules?
1.       Is there any special or unique ways I have to setup MAX because I have multiple modules or does setting the "CJC Source" to "Built In" work correctly?
There is no correct way of setting up the CJC source it will depend on what you want to accomplish. You can use multiplex mode or direct mode by changing the jumpers (MTEMP or DTEMP), let’s say you will like to read the room temperature with scxi-1320 #1 you will set this for DTEMP and use SCxMody/_cjTemp to address the channel.
2.       Which CJC of the three 1320's does max use for each channel?
It will use all each CJC for each SCXI-1320, so for example every time there is a measurement in SCXI-1320 #1 and SCXI-1320 #2 it will read the CJC of the 1320 #1 and then the 1320 #2.
3.       What should the 1320 jumper be set to (MTEMP or DTEMP)? Assume I am in multiplex mode.
You will set it up depending on what you would like to do. I will suggest setting the jumper to “mtemp” and if you will like to read that value from the CJC of one of the modules just use SCxMody/_cjTemp as the address where x = chassis and y = module.
I hope it helps
Jaime Hoffiz
National Instruments
Product Expert
Digital Multimeters and LCR Meters

Which type of V/A sensor suitable for the use of SCC -2345?

Which type/brand of Voltage/current sensor suitable for the connection of SCC -2345?

Hi TARC,
There are a lot of options for measuring voltage or current in the National Instruments SCC series. These are listed below, with the link to NI’s website where these modules can be found.
SCC Analog Input Modules
http://sine.ni.com/nips/cds/view/p/lang/en/nid/10339
2 Channel Voltage Input Module:
·         SCC-AI01, 2 Channel Isolated Analog Input (42V, 10 kHz)
·         SCC-AI02, 2 Channel Isolated Analog Input (20V, 10 kHz)
·         SCC-AI03, 2 Channel Isolated Analog Input (10V, 10 kHz)
·         SCC-AI04, 2-Channel Isolated Analog Input (5V, 10 kHz)
·         SCC-AI05, 2-Channel Isolated Analog Input (1V, 10 kHz)
·         SCC-AI06, 2 Channel Isolated Analog Input (100 mV, 10 kHz)
·         SCC-AI07, 2 Channel Isolated Analog Input (50 mV, 10 kHz)
·         SCC-AI13, 2 Channel Isolated Analog Input (10V, 4 Hz)
·         SCC-AI14, 2 Channel Isolated Analog Input (5V, 4 Hz)
2 Channel Current Input Module
·         SCC-CI20 2-Channel Current Input Module, 0-20 mA
2 Channel Voltage Attenuator Module
·         SCC-A10 2-Channel Attenuator Input Module, 10-to-1
These modules will work with any standard transducer.
Hope this helps!
Ed Waxler | Applications Engineering | National Instruments

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Thanks
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Also the other possibility, that if in your case purchase requisition are converted to purchase orders through background jobs,
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Unit of measure not defined for language ZH

Hi,
We were creating a PO when we encountered the error which states "Unit of measure not defined for language ZH".
We executed CUNI to translate the units of measurement to our target language. System prompted "This object was segmented. Only new lines evaluated." What does this mean?
We tried creating the PO again, however we encountered the same error that the unit of measure was not defined for the language.
Please recommend action/s that we should take. Thank you.

Take a look at the below threads. Your problem has the solution.
Re: Unit of measure XX not defined for language DE
Re: Unit of Measure Error in Purchase order

If bought NI USB-6800 device, is Measurement Studio free for dev?

If bought a NI USB-6800 device, is Measurement Studio free for VC++ development?
Do I need to buy the Measurement Studio license?
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Plus I noticed that there are UNIX/Linux drivers about NI USB-6800 device, but there is no document about C/C++ development under UNIX/Linux!
Can I do the development with NI USB-6800 device under UNIX/Linux?
An individual human existence should be like a river - small at first, narrowly contained within its banks, and rushing passionately past boulders and over waterfalls. Gradually the river grows wider, the banks recede, the waters flow more quietly, and in the end, without any visible break, they become merged in the sea, and painlessly lose their individual being.

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How to Measure time taken for a some lines of code in a program?

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I have one requirement to measure time taken for executing a block of code in report . How we can find it ?
Is there any way to code something in report to caluculate it ?
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thank u

Ok.. try this code...
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Hello,
The NI SCC-FT01 is a feedthrough module that offers direct connection to analog input or output, digital I/O and Counter channels of the E Series DAQ device. It also includes breadboard area for development of custom signal conditioning circuitry for analog input, analog output, digital I/O, and GPCTR channels of the E Series DAQ device.
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Converting RTD voltage to temperature using SCC-TC module.

I'm trying to convert the thermistor voltage from an SCC-TD module to deg C (using VB6). I am using the formulas supplied with the SCC-TC manual. The formula that I'm having problems with is Tk = 1/ [a+b(1nRt)+c(1nRt)^3]. I understand Rt to be the resistance of the thermistor but what is 1n?
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Hello,
It is not 1n, it is ln i.e., natural logarithm.
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NI-DAQ Users Manual
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Does SCC-A10 module provide isolation similar to SCC-AIxx module?

I have a NRSE signal with range of 0 to 13 volts. I am using an SC-2345 and a DAQ-6035E.
I have both SCC-AI04 modules and SCC-A10 modules. I currently have it set up with the SCC-AI04 module and a resistor voltage divider on the input to scale the input from 0-13 volts to 0-5 volts.
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Voltage Limits to SCC-CI20 Module

I am going to be usinga sc-2345 and SCC-CI20 module to measure a 4-20mA signal from a pressure transmitter. An external power supply of 12-30 VDC will be applied to the pressure transmitter. The manufactures diagram shows the +DC from Pwr sup. going to the +side of the transmitter, the -side of the transmitter going to the receiver load, and then going out of the receiver load to the - DC Pwr Sup. Do I connect the SCC-CI20 as the receiver load? Is there a limit to the voltage the SCC-Ci20 module can take,(12-30VDC I hope is OK)?

Ranger1,
Yes you need to connect the CI20 in series with the transmitter so that it could measure the current.
The SCC-CI20 can handle a maximum working voltage of 15V from channel-to-earth. This spec can be found on page 13 of your users manual.
Hope this helps.
Kevin R
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Can you hear the fans and hard drive and see the white boot screen? Flashing question mark? The circle just runs and nothing happens? Only black screen and nothing else? These can be very helpful to diagnose the source of the problem. [1]
Flashing question mark [2]: This is usually a sign of a failed hard drive. This indicates that boot up volume can not be found.
Black screen: This is usually a sign of a failed logic board. There is no single reason for this and this may be caused by failed GPU, screen, CPU or RAM.
Circle of death/no circle/blue screen: This is usually a sign of a hard drive failure. This may NOT be a dead hard drive, just broken permissions or something
Gray screen/Apple logo/spinning gear or globe/prohibitory sign/folder with flashing question mark [3]: This could be a sign of faulty hardware but more likely a software issue, i.e. broken permissions, failed software update, etc.
[edit]
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First, hold down the option key (also known as the alt key) just after you've pressed the power button. This should show all the available options to boot from, so if you have Windows installed through Bootcamp or a disk in your SuperDrive, you should be able to see them along with your OS X drive/partition. Select the OS X partition with arrow keys and press enter. Startup key combinations
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2. PRAM reset [5]. Hold down option, command, P and R while booting. Start it when you hear the sound and don't let go before it reboots.
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Can I use SCC-DI01 modules with a PCI-6533 device?

I am looking into performing buffered acquisition of various digital signals using a PCI-6533 device. Can I use SCC-DI01 modules with this device? If so, would this be via the SC-2345 Carrier? The manual seemed to suggest is was only compatible with E-series devices?
Basically, I want to monitor 32 digital channels and will have a mixture of 5V and 24V signals.
Many thanks,
Douglas

Hi Douglas
Could you please clarify where the manual suggests that the module is only compatible with an E series board (is it because only an E series board is referenced in the manual)?
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Kind Regards
Stuart R

Measurement of CJC for 1 of 3 SCC-TC modules

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