Correct Choice of the QUARTER Bridge Type
Hello,
We have to measure 80x SG (strain gauge) channels with 20x NI-9237 modules in 3x cDAQ-9188 chassis. The CEng guy wants to use a passive SG for temperature compensation in all channels (although not needed because we use self compensating SGs in their temperature range). So he will glue the active SGs on the tested model, and he will glue the passive SGs on pieces of same material AWAY FROM THE MODEL - NO THERMAL CONTACT WITH THE MODEL!
This configuration for me is QUARTER Bridge Type 1 since the passive SGs (dummies) are just resistors unaffected by the seismic activities on the model.
However, he insists on Type 2 guided by its definition ("Strain Gauge Configuration Types" Tutorial) which sounds like his comprehension of his bridge. I stay with Type 1 because the dummies are not in a close contact to the tested model - I see them just as bridge completion resistors.
Can someone with expertise in SG conditioning and measurements help in solving this dilemma?
Thanks in advance,
OK, let me paraphraze my questions.
1. RemoteSensing
NI-9237 documentation says RemoteSensing is meant for HALF and FULL bridges, and for QUARTERs we should use shunt calibration. Since I plan to use Q2 which is not a HALF bridge will RemoteSensing be performed by the NI-9237 or not? If NOT, will measuring lead resistance do the job instead? I find it very awkward that this crucial info is missing from the NI-9237 documentation!
2. Brdge balancing
NI-9237 documentation says this module needs to know the "initial voltage" measured on disconnected ETERNAL part of the bridge to compensate for offset. I have used the "DAQmx Perform Bridge Offset Nulling Calibration.VI" to balance all my bridges in COMPLETED status prior to any acquisition. Is this doing the job so I do not have to measure the "initial voltages"?
The tasks of interest are the 3x cDAQ. The PXI task needs some IEPE current sources to be switched on for 60sec prior to the acquisition so that the PCB accelerometers can be initialized.
Thanks in advance,
Attachments:
SaveNullsFile.png 57 KB
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Attachments:
Quarter Bridge 5B38.gif 16 KB -
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Network adapter Wireless Network Connection driver information:
Description . . . . . . . . . . : Intel(R) Centrino(R) Advanced-N 6250 AGN
Manufacturer . . . . . . . . . : Intel Corporation
Provider . . . . . . . . . . . : Intel
Version . . . . . . . . . . . : 13.2.1.5
Inf File Name . . . . . . . . . : C:\Windows\INF\oem17.inf
Inf File Date . . . . . . . . . : Monday, June 14, 2010 9:05:44 AM
Section Name . . . . . . . . . : Install_MPCIEX_GEN_6250_AGN_2x2_HMC_WIN7_64_MOW
Hardware ID . . . . . . . . . . : pci\ven_8086&dev_0087&subsys_13018086
Instance Status Flags . . . . . : 0x180200a
Device Manager Status Code . . : 0
IfType . . . . . . . . . . . . : 71
Physical Media Type . . . . . . : 9
Informational Diagnostics Information (Wireless Connectivity)
Details about wireless connectivity diagnosis:
Information for connection being diagnosed
Interface GUID: 70a0781d-6329-45e4-8d7c-34aeca294c39
Interface name: Intel(R) Centrino(R) Advanced-N 6250 AGN
Interface type: Native WiFi
Connection incident diagnosed
Auto Configuration ID: 1
Connection ID: 1
Connection status summary
Connection started at: 2015-03-07 19:57:14-186
Profile match: Success
Pre-Association: Success
Association: Success
Security and Authentication: Success
List of visible access point(s): 22 item(s) total, 22 item(s) displayed
BSSID BSS Type PHY Signal(dB) Chnl/freq SSID
60-02-92-C6-D3-E8 Infra <unknown> -62 11 HOME-C7D4-2.4
60-02-92-A1-75-E0 Infra <unknown> -58 6 HOME-B917-2.4
00-1D-D5-D5-34-F0 Infra <unknown> -73 6 HOME-34F2
60-02-92-A1-75-E1 Infra <unknown> -58 6 (Unnamed Network)
06-1D-D5-D5-34-F0 Infra <unknown> -78 6 xfinitywifi
C4-27-95-C9-C4-2D Infra <unknown> -57 1 HOME-C42D
02-1D-D5-D5-34-F0 Infra <unknown> -74 6 (Unnamed Network)
00-0D-97-07-E0-79 Infra g -75 6 (Unnamed Network)
00-1D-CF-2A-44-C0 Infra <unknown> -86 6 HOME-44C2
02-1D-CF-2A-44-C0 Infra <unknown> -86 6 (Unnamed Network)
F8-E4-FB-3C-87-A2 Infra <unknown> -89 6 YVNM7
06-1D-CF-2A-44-C0 Infra <unknown> -87 6 xfinitywifi
0C-F8-93-7A-13-50 Infra b -87 6 PKennedy
06-F8-93-7A-13-50 Infra b -89 6 xfinitywifi
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E0-88-5D-C8-A9-DC Infra <unknown> -80 1 HOME-A9DC
E2-88-5D-C8-A9-DD Infra <unknown> -79 1 (Unnamed Network)
16-CF-E2-43-0B-30 Infra <unknown> -88 1 xfinitywifi
60-02-92-F0-A8-C0 Infra <unknown> -90 11 HOME-96A6-2.4
60-02-92-C6-D3-E9 Infra <unknown> -63 11 (Unnamed Network)
02-1D-D4-EB-87-00 Infra <unknown> -88 11 (Unnamed Network)
06-1D-D4-EB-87-00 Infra <unknown> -88 11 xfinitywifi
Connection History
Information for Auto Configuration ID 1
List of visible networks: 13 item(s) total, 13 item(s) displayed
BSS Type PHY Security Signal(RSSI) Compatible SSID
Infra <unknown> Yes 63 Yes HOME-C7D4-2.4
Infra <unknown> Yes 70 Yes HOME-B917-2.4
Infra <unknown> Yes 43 Yes HOME-34F2
Infra <unknown> Yes 70 Yes (Unnamed Network)
Infra <unknown> No 40 Yes xfinitywifi
Infra <unknown> Yes 71 Yes HOME-C42D
Infra g No 43 Yes (Unnamed Network)
Infra <unknown> Yes 28 Yes HOME-44C2
Infra <unknown> Yes 20 Yes YVNM7
Infra b Yes 21 Yes PKennedy
Infra <unknown> Yes 33 Yes HOME-A9DC
Infra <unknown> Yes 35 Yes (Unnamed Network)
Infra <unknown> Yes 16 Yes HOME-96A6-2.4
List of preferred networks: 3 item(s)
Profile: xfinitywifi
SSID: xfinitywifi
SSID length: 11
Connection mode: Infra
Security: No
Set by group policy: No
Connect even if network is not broadcasting: No
Connectable: Yes
Profile: HTC Portable Hotspot 9F50
SSID: HTC Portable Hotspot 9F50
SSID length: 25
Connection mode: Infra
Security: Yes
Set by group policy: No
Connect even if network is not broadcasting: No
Connectable: No
Reason: 0x00028002
Profile: belkin.332
SSID: belkin.332
SSID length: 10
Connection mode: Infra
Security: Yes
Set by group policy: No
Connect even if network is not broadcasting: No
Connectable: No
Reason: 0x00028002
Information for Connection ID 1
Connection started at: 2015-03-07 19:57:14-186
Auto Configuration ID: 1
Profile: xfinitywifi
SSID: xfinitywifi
SSID length: 11
Connection mode: Infra
Security: No
Pre-Association and Association
Connectivity settings provided by hardware manufacturer (IHV): No
Security settings provided by hardware manufacturer (IHV): No
Profile matches network requirements: Success
Pre-association status: Success
Association status: Success
Last AP: 06-1d-d5-d5-34-f0
Security and Authentication
Configured security type: Open
Configured encryption type: None
802.1X protocol: No
Key exchange initiated: Yes
Unicast key received: No
Multicast key received: No
Number of security packets received: 0
Number of security packets sent: 0
Security attempt status: Success
Connectivity
Packet statistics
Ndis Rx: 2068
Ndis Tx: 2543
Unicast decrypt success: 0
Multicast decrypt success: 0
Unicast decrypt failure: 0
Multicast decrypt failure: 0
Rx success: 3954
Rx failure: 0
Tx success: 537
Tx failure: 4
Tx retry: 2
Tx multiple retry: 2
Tx max lifetime exceeded: 0
Tx ACK failure: 18
Roaming history: 0 item(s)
InformationalDiagnostics Information (Wireless Connectivity)
Details about wireless connectivity diagnosis:
For complete information about this session see the wireless connectivity information event.
Helper Class: Auto Configuration
Initialize status: Success
Information for connection being diagnosed
Interface GUID: 70a0781d-6329-45e4-8d7c-34aeca294c39
Interface name: Intel(R) Centrino(R) Advanced-N 6250 AGN
Interface type: Native WiFi
Result of diagnosis: There may be problem
Network Connection details from Command Prompt (some info hidden for security reasons)
Connection-specific DNS Suffix:
Description: Intel(R) Centrino(R) Advanced-N 6250 AGN
Physical Address: 00-23-15-54-19-B8
DHCP Enabled: Yes
IPv4 Address: 192.168.X.XX
IPv4 Subnet Mask: 255.255.XX.X
Lease Obtained: Saturday, March 07, 2015 7:57:14 PM
Lease Expires: Saturday, March 07, 2015 8:24:44 PM
IPv4 Default Gateway: 192.168.X.X
IPv4 DHCP Server: 192.168.X.X
IPv4 DNS Servers: 75.75.75.75, 75.75.76.76
IPv4 WINS Server:
NetBIOS over Tcpip Enabled: Yes
Link-local IPv6 Address: fe80::b8de:3ac9:e166:XXX%XX
IPv6 Default Gateway:
IPv6 DNS Server:
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Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
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Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
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Reply from 173.194.121.6: bytes=32 time=19ms TTL=55
Request timed out.
Request timed out.
Ping statistics for 173.194.121.6:
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),
Approximate round trip times in milli-seconds:
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Pinging 74.125.239.34 with 32 bytes of data:
Request timed out.
Request timed out.
Reply from 74.125.239.34: bytes=32 time=3286ms TTL=50
Request timed out.
Ping statistics for 74.125.239.34:
Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),
Approximate round trip times in milli-seconds:
Minimum = 3286ms, Maximum = 3286ms, Average = 3286ms
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Reply from 65.55.157.204: bytes=32 time=111ms TTL=237
Request timed out.
Request timed out.
Reply from 65.55.157.204: bytes=32 time=1537ms TTL=237
Ping statistics for 65.55.157.204:
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),
Approximate round trip times in milli-seconds:
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Pinging 207.46.11.236 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 207.46.11.236:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
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5 19 ms 18 ms 18 ms 50-248-116-190-static.hfc.comcastbusiness.net [50.248.116.190]
6 35 ms 18 ms 18 ms 209.85.249.217
7 21 ms 19 ms 19 ms 72.14.233.93
8 * * * Request timed out.
9 * 2509 ms 677 ms iad23s25-in-f5.1e100.net [173.194.121.5]
Trace complete.
C:\Windows\system32>tracert 74.125.239.34
Tracing route to nuq04s19-in-f2.1e100.net [74.125.239.34]
over a maximum of 30 hops:
1 54 ms 23 ms 12 ms xfwsr12-nwca-01.sys.comcast.net [68.85.15.244]
2 22 ms 19 ms 17 ms ae-14-32767-ar03.newcastle.de.panjde.comcast.net[68.85.192.205]
3 19 ms 19 ms 18 ms he-5-14-0-0-cr01.ashburn.va.ibone.comcast.net [68.86.166.121]
4 18 ms 18 ms 18 ms he-0-15-0-0-cr01.350ecermak.il.ibone.comcast.net[68.86.85.74]
5 19 ms 18 ms 22 ms 50-248-116-190-static.hfc.comcastbusiness.net [50.248.116.190]
6 22 ms 36 ms 19 ms 209.85.249.217
7 26 ms 23 ms 25 ms 209.85.143.112
8 * * * Request timed out.
9 * * * Request timed out.
10 972 ms * * 216.239.51.97
11 148 ms 97 ms 95 ms 216.239.46.241
12 324 ms 130 ms 432 ms 209.85.246.252
13 * * * Request timed out.
14 1403 ms 101 ms 126 ms nuq04s19-in-f2.1e100.net [74.125.239.34]
Trace complete.
C:\Windows\system32>tracert www.hotmail.com
Tracing route to dispatch.kahuna.glbdns2.microsoft.com [65.55.157.144]
over a maximum of 30 hops:
1 13 ms 13 ms 25 ms xfwsr12-nwca-01.sys.comcast.net [68.85.15.244]
2 13 ms 15 ms 13 ms ae-14-32767-ar03.newcastle.de.panjde.comcast.net[68.85.192.205]
3 20 ms 19 ms 17 ms he-5-13-0-0-cr01.ashburn.va.ibone.comcast.net [68.86.95.145]
4 17 ms 20 ms 20 ms he-0-13-0-0-pe07.ashburn.va.ibone.comcast.net [68.86.86.50]
5 17 ms 18 ms 38 ms as8075-2-c.ashburn.va.ibone.comcast.net [173.167.58.82]
6 18 ms 18 ms 36 ms ae4-0.ash-96cbe-1a.ntwk.msn.net [207.46.36.172]
7 * * * Request timed out.
8 * 2191 ms 35 ms ae0-0.atb-96cbe-1b.ntwk.msn.net [191.234.81.167]
9 * * * Request timed out.
10 * * * Request timed out.
11 86 ms 84 ms 84 ms ae4-0.lax-96cbe-1a.ntwk.msn.net [191.234.83.150]
12 86 ms 86 ms 87 ms ae9-0.by2-96c-1a.ntwk.msn.net [207.46.42.176]
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 87 ms 84 ms 85 ms origin.by173w.bay173.mail.live.com [65.55.157.144]
Trace complete.
C:\Users\C.Cunningham>tracert 207.46.11.236
Tracing route to origin.by181w.bay181.mail.live.com [207.46.11.236]
over a maximum of 30 hops:
1 16 ms 16 ms 19 ms xfwsr12-nwca-01.sys.comcast.net [68.85.15.244]
2 18 ms 13 ms 13 ms ae-14-32767-ar03.newcastle.de.panjde.comcast.net[68.85.192.205]
3 21 ms 19 ms 21 ms he-5-12-0-0-cr01.ashburn.va.ibone.comcast.net [68.86.95.141]
4 18 ms 21 ms 18 ms he-0-13-0-0-pe07.ashburn.va.ibone.comcast.net [68.86.86.50]
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.
Results of Intel WiFi Manual Diagnostics
Test Name Test Result Test Summary
Hardware Test Passed Wireless Hardware is enabled
Driver Test Passed Diver is loaded. NETwNs64 Version 13.3.0.24
Radio Test Passed Radio is ON
Scan Test Passed There are 25 Networks available to connect
Association Test Passed Associated
Authentication Test Passed Authenticated
Signal Test Passed Signal Quality: Poor
Ping Test Failed No Reponse: default gateway, DHCP server
I hope this information is enough to get to the root of this problem once and for all. Please let me know if you any other information such as event logs or statistics.
Thanks in advance.Results of Intel WiFi Event View Log (I deleted some lines since there were basically repeats of the same messages)
#Event Source Time
Error Severity Domain
User Description
45 EvtEngine
3/8/2015 20:40 Success
Connection SYSTEM
iAMT - Failed to read Windows Events Log
46 S24EvMon
3/8/2015 20:41 Information
AppDriver
SYSTEM
Getting List of adapters.
47 S24EvMon
3/8/2015 20:41 Information
AppDriver
SYSTEM
Intel adapter(s) found.
156 S24EvMon
3/8/2015 20:47 Information
Driver SYSTEM
AddToExclude 06:1d:d5:d5:34:f0 xfinitywifi 6 WEV_EXCLUDE_LIST_REASON_802_11_AUTH_FAILURE
157 S24EvMon
3/8/2015 20:47 Information
Driver SYSTEM
ATC 06:1d:cf:2a:44:c0 xfinitywifi 6 RSSI=-88
158 S24EvMon
3/8/2015 20:47 Error
Driver SYSTEM
AssociationFailure 06:1d:cf:2a:44:c0 xfinitywifi 6 CNCT_GENERAL_FAILURE
159 S24EvMon
3/8/2015 20:47 Information
Driver SYSTEM
AddToExclude 06:1d:cf:2a:44:c0 xfinitywifi 6 WEV_EXCLUDE_LIST_REASON_802_11_ASSOC_FAILURE
160 S24EvMon
3/8/2015 20:47 Information
Driver SYSTEM
ATC 06:1d:d5:d5:34:f0 xfinitywifi 6 RSSI=-79
161 S24EvMon
3/8/2015 20:47 Success
Driver SYSTEM
RxAuthSuccess 06:1d:d5:d5:34:f0 6
162 S24EvMon
3/8/2015 20:47 Success
Driver SYSTEM
RxAssocResp 06:1d:d5:d5:34:f0 6 -77
163 S24EvMon
3/8/2015 20:49 Information
TCP/IP SYSTEM
VoIP: Got link down - deleting flows .
164 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
ATC 06:1d:d4:eb:87:00 xfinitywifi 11 RSSI=-88
165 S24EvMon
3/8/2015 20:49 Error
Driver SYSTEM
AssociationFailure 06:1d:d4:eb:87:00 xfinitywifi 11 CNCT_GENERAL_FAILURE
166 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
AddToExclude 06:1d:d4:eb:87:00 xfinitywifi 11 WEV_EXCLUDE_LIST_REASON_802_11_ASSOC_FAILURE
167 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
ATC 06:1d:d4:eb:87:00 xfinitywifi 11 RSSI=-89
168 S24EvMon
3/8/2015 20:49 Error
Driver SYSTEM
AssociationFailure 06:1d:d4:eb:87:00 xfinitywifi 11 CNCT_GENERAL_FAILURE
169 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
AddToExclude 06:1d:d4:eb:87:00 xfinitywifi 11 WEV_EXCLUDE_LIST_REASON_802_11_ASSOC_FAILURE
170 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
ATC 06:1d:d4:eb:87:00 xfinitywifi 11 RSSI=-90
171 S24EvMon
3/8/2015 20:49 Error
Driver SYSTEM
AssociationFailure 06:1d:d4:eb:87:00 xfinitywifi 11 CNCT_GENERAL_FAILURE
172 S24EvMon
3/8/2015 20:49 Information
Driver SYSTEM
ATC 06:1d:d5:d5:34:f0 xfinitywifi 6 RSSI=-82
173 S24EvMon
3/8/2015 20:49 Success
Driver SYSTEM
RxAuthSuccess 06:1d:d5:d5:34:f0 6
174 S24EvMon
3/8/2015 20:49 Success
Driver SYSTEM
RxAssocResp 06:1d:d5:d5:34:f0 6 -81
175 S24EvMon
3/8/2015 20:50 Information
Driver SYSTEM
AddToExclude 06:1d:d5:d5:34:f0 xfinitywifi 6 WEV_EXCLUDE_LIST_REASON_802_11_AUTH_FAILURE
176 S24EvMon
3/8/2015 20:50 Information
Driver SYSTEM
ATC 06:1d:d5:d5:34:f0 xfinitywifi 6 RSSI=-79
177 S24EvMon
3/8/2015 20:50 Success
Driver SYSTEM
RxAuthSuccess 06:1d:d5:d5:34:f0 6
178 S24EvMon
3/8/2015 20:50 Success
Driver SYSTEM
RxAssocResp 06:1d:d5:d5:34:f0 6 -80
179 S24EvMon
3/8/2015 21:03 Information
Driver SYSTEM
RoamTrigger 06:1d:d5:d5:34:f0 xfinitywifi 6 RSSI=-81 MisBcn=8 RSSITh=-85 Roam Other Reason
186 S24EvMon
3/8/2015 21:21 Information
General
SYSTEM
DeviceIoCtrlS24NDIS: (2) Failed to send OID 0xff100055 to driver. Error - 31
187
S24EvMon
3/8/2015 21:21 Information
General
SYSTEM
DeviceIoCtrlS24NDIS - Dot11ExtNicSpecificExtension failed (31) -
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We use a cloud based application, ServiceNow for Service managerment. They provide an odbc 3.5 compliant driver which works outside of Data Services fine.
I tried adding a Datastore for this choosing the 'ODBC' database type. When I click [OK], it Crashed the Designer client !
There are a lot of OBDC options in the advance properties and I tried turning some off, but so far it keeps crashing everytime I click ok.
I assumed the point of the 'ODBC' database option was to provide limited support for this sort of thing. Am I correct ?
The manuals state:
The Data Services UNIX ODBC driver manager provides the option to load any ODBC driver library when the ODBC driver satisfies following:
The ODBC driver is at least ODBC 2.0 compliant
The ODBC driver library is thread-safe
I assume the same is true on Windows (the manuals are very UNIX-focused) ?yes, you can use ODBC datastore for this purpose, but this may not always work since different drivers have there own implementation and requirements
you will have to findout if the issue is with ODBC Driver or with the DS, are you able to do a test connection successfully when creating a system DSN ?
try enabling the ODBC trace and see where it fails when you click ok in DS
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