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TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 1
INSTRUCTION MANUAL
S3497X Psychrometer Software and A3497 TC Psychrometer Cooling Current Interface
Revision: 1/92
Copyright (c) 1984-1992 Campbell Scientific, Inc.
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 3
... Temperature Measurement 2 4. Function 1 2. Input and A3497 Interface Connections 2 5. Use the Adobe Acrobat® bookmarks tab for links to the printed version of this document. Example 4 8. Model S3497X Psychrometer Software and Model A3497 Interface Table of Contents
PDF viewers note: These page numbers refer to specific sections.
1. Output Format 4 7.
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 5
...psychrometers (TCP) excited through Campbell Scientific's Model A3497 Psychrometer Cooling Current Interface. Thus, five TCPs are the numerical average of psychrometers per TCP; 25 PELTIER THERMOCOUPLE PSYCHROMETER
1. DATA NO. Option code...measurements Reference temperature location. Number of five TCPs and programming Instruction 25 within the limitation of the CR7 Excitation Card by ...
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 6
...A3497s measured within a Loop. TCP Color Coding for Wescor and Merrill Psychrometers
CR7
Hi Lo Ground
Wescor Model PST-55
Red Black Blue
Merrill Model 74
White Blue Red
2 The base ... Location Number of the reference temperature is obtained using the Panel Temperature Instruction 17. 25 PELTIER THERMOCOUPLE PSYCHROMETER
If zero delay between wet-bulb readings is specified in Parameter 14,...
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 7
... V, 50 mA at ground through a 10K resistor preventing leakage of the A3497 Interface. 25 PELTIER THERMOCOUPLE PSYCHROMETER
Figure 1. THE A3497 INTERFACE AND CURRENT CALCULATION
Figure 2 is limited by
V = I )(Np) where...five TCPs is disabled. The use of 8 mA for a given excitation voltage. The instruction uses the same voltage but 10 mA per meter. For example, a current of ...
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 8
... using a Sample Instruction for each TCP associated with one A3497 Interface and the number of Loop Delay Loop Count
03:
P
01: 4
02: 2
03: 1
04: 2
05: 1 06: 1 07: 1 08: 1 09: -1900 10: 1500 11: 1500 12: 1500 13: 0 14: 0 15: 29
25 Thermocouple Psychrometer Psychrometers per psychr.
04:
P
01: 10
86 Do Set high Flag...
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 9
11:
P
01: 31
02: 95
12:
P
13:
P
70 Sample Reps Loc TCP 4 #1
95 End
End Table 1
25 PELTIER THERMOCOUPLE PSYCHROMETER
5
TC Psychrometer PROM and Cooling Current Interface (S3497X, A3497) - Page 10
...+0.152 22+0.202 30+0.226
07+22.46 15+0.143 23+0.217 31+0.251
08+6.187 16+0.113 24+0.226 32+0.256
6 25 PELTIER THERMOCOUPLE PSYCHROMETER
Table 2.
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