Measurement Computing TempScan/1100 - Manual (Page 123)

TempScan / MultiScan User's Manual 879596 System Calibration 6-7
The Calibrate Channel Offset (
H
) command – formatted as Hchan – and the Calibrate Channel Gain (
G
)
command – formatted as Gchan,type – typically refer to calibration being performed on the first channel
number chan of each selected scanning card. These typical channel values are indicated in the second
table. However, any channel may be used. Make sure that the channel selected with the calibration
command matches the channel connected to the precision voltage source. Note that all three of the
TempScan/1100, TempScan/1000A, and MultiScan/1200 master chassis slots each uses scanning card
Channel 1.
The Calibrate Cold Junction Offset (
J
) command – formatted as Jchan,type,temp – refers to calibration
being performed on multiple channel numbers of each selected scanning card. The TempTC/32B (for the
TempScan/1100) and TempTC/32A (for the TempScan/1000A) thermocouple scanning cards each have 4
on-card temperature-sensor channels for cold-junction compensation of the thermocouple signals, while the
MTC/24 (for the MultiScan/1200) thermocouple/volts scanning card has only 3 on-card temperature-sensor
channels.
The multiple temperature-sensing channels on each scanning card must be supplied with an accurate
thermocouple signal of known warm-junction temperature. This may be accomplished by means of an
accurate thermocouple calibration source or of an accurate measurement of the temperature of the existing
thermocouple heat sources. Subsequently, the
J command must be entered 4 times for each
TempScan/1100 or TempScan/1000A scanning card, while the J command must be entered only 3 times
for each MultiScan/1200 scanning card.
Cold-Junction Channel Numbers
Exp/10A Exp/11A Master Unit Chassis
Unit # Slot # Unit # Slot # TempScan/1100
(of 992 Channels)
TempScan/1000A
(of 992 Channels)
MultiScan/1200
(of 744 Channels)
1 1 1 1 44,48,60,64 33,37,49,53 25,33,41
2 2 76,80,92,96 65,69,81,85 49,57,65
2 1 3 108,112,124,128 97,101,113,117 73,81,89
2 4 140,144,156,160 129,133,145,149 97,105,113
3 1 5 172,176,188,192 161,165,177,181 121,129,137
2 6 204,208,220,224 193,197,209,213 145,153,161
4 1 7 236,240,252,256 225,229,241,245 169,177,185
2 8 268,272,284,288 257,261,273,277 193,201,209
5 1 9 300,304,316,320 289,293,305,309 217,225,233
2 10 332,336,348,352 321,325,337,341 241,249,257
6 1 2 1 364,368,380,384 353,357,369,373 265,273,281
2 2 396,400,412,416 385,389,401,405 289,297,305
7 1 3 428,432,444,448 417,421,433,437 313,321,329
2 4 460,464,476,480 449,453,465,469 337,345,353
8 1 5 492,496,508,512 481,485,497,501 361,369,377
2 6 524,528,540,544 513,517,529,533 385,393,401
9 1 7 556,560,572,576 545,549,561,565 409,417,425
2 8 588,592,604,608 577,581,593,597 433,441,449
10 1 9 620,624,636,640 609,613,625,629 457,465,473
2 10 652,656,668,672 641,645,657,661 481,489,497
11 1 3 1 684,688,700,704 673,677,689,693 505,513,521
2 2 716,720,732,736 705,709,721,725 529,537,545
12 1 3 748,752,764,768 737,741,753,757 553,561,569
2 4 780,784,796,800 769,773,785,789 577,585,593
13 1 5 812,816,828,832 801,805,817,821 601,609,617
2 6 844,848,860,864 833,837,849,853 625,633,641
14 1 7 876,880,892,896 865,869,881,885 649,657,665
2 8 908,912,924,928 897,901,913,917 673,681,689
15 1 9 940,944,956,960 929,933,945,949 697,705,713
2 10 972,976,988,992 961,965,977,981 721,729,737
Master Unit Chassis Slot 12,16,28,32 1,5,17,21 1,9,17