CJC Temperature sensor measurement on SCB-100

I am trying to measure temperature at CJC-T sensor on SCB-100 box. I grounded the differential channel "0" (short-circuited pins 2,3 and 4). I am measuring a temperature reading(22.3 Deg Cel) at channel "0" (I am not sure if it correct) when CJC was disabled (S4 and S5 in down position) but some junk when I have the CJC enabled(S4 and S5 in up position). Moreover, it shows the same reading even when the SCB-100 box is put in a heated chamber. why?
I have similar problems with an external thermocouple too. Ironically, it reads when CJC is disabled and nothing when CJC is enabled. Am I missing something that needs to be done? I am also attaching the SCB-100 manual for quick reference.
Attachments:
scb100installation.pdf ‏124 KB

Also, make sure that you have selected the scb-100 as the accessory for the DAQ board. You can do this by right-clicking on the DAQ board under devices and interfaces in Measurement and Automation Explorer (MAX) and selecting "Properties," going to the Accessory tab, and then choosing the scb-100 (check the CJC jumper set). Once you do this, you can create virtual channels in MAX and will want to select "built-in" for the CJC of the thermocouple virtual channel.

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www.ni.com/ask

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Figure 1: Green is Good
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Figure 2: Self-Test and Reset Device
For these devices the correct driver to use would be NI-DAQmx 8.8.
Message Edited by Dan_K on 12-03-2008 11:01 AM
Regards,
Dan King
Attachments:
buttons.jpg ‏9 KB
devices.jpg ‏38 KB

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I want to know OID value for 'Chasis Temperature sensor' of C4948E.
as below, I could find it for C4948 but couldn't C4948E and C4948E-F.
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======================================== C4948-10G ======================================================
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Chassis Temperature                    = 48 degrees Celsius
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Hi,
I found this for you
Table 2. Physical and Environmental Characteristics
Feature
Specification
Environmental
Operating temperature
32 to 104°F (0 to 40°C)
Storage temperature
-40 to 167°F (-40 to 75°C)
Relative humidity
10 to 90%, noncondensing
Operating altitude
-196 to 6561 ft (-60 to 2000m)
Mean time between failure (MTBF)
• Cisco Catalyst 4948E-F : 149,261 hours
• Cisco Catalyst 4948E: 145,422 hours
Airflow
• 28 cubic feet per minute (CFM) at low speed
• 44 CFM at full speed
Physical
Dimensions
1.75 x 17.5 x 19.4 in. (4.4 x 44.4 x 49.3 cm)
Weight
• 19 lb (8.62 kg) (fully loaded with 2 power supplies and fan tray)
• 14 lb (6.35 kg) (base system only; no power supply or fan tray)
Power
AC input voltage range
90 to 264 VAC
DC input voltage range
-40.5 to -72 VDC
Maximum current
• AC: 4 amperes (A) at 120 VAC; 2A at 240 VAC input
• DC: 8A at -48 VDC input
Typical operating power
230W at 25°C
Maximum power
275W at 55°C
RoHS compliant
RoHS-6 compliance
Heat dissipation (maximum)
• AC Input: 1173 BTU per hour
• DC Input: 1251 BTU per hour
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6021/ps10947/data_sheet_c78-598933.html
Please rate the helpful posts.
Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."

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I don't have the manual in front of me, but isn't it mentioned there? JT1 or something like that. I'll look on the Imperfect...
...Still searching, only found this:
http://www.computing.net/cpus/wwwboard/forum/8962.html
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