Configuration & Calibration
31
3.10 Set D/A Trim
D/A Trim is NOT a calibration! This is a pre
calibrated alignment to precision factory settings
and is rarely in need of change. The procedure is
intended only as a slight "meter" adjustment to a
known external reference.
The Digital to Analog (D/A) Trim adjusts the transmitter
mA (current) output. Since the smart transmitter
performs a digital to analog conversion, there may be a
discrepancy in the 4-20 mA output loop as measured with
a reliable external milliampere meter.
For example: perhaps after calibration you observe that
the tank is empty and a hand-held mA meter reads only
3.94 mA, while the Real Time View in the PC Menu shows
4.00 mA. By adjusting the D/A trim, you may digitally
manipulate the output current to equal 4.00. You may
also wish to adjust the high end to 20.00 mA.
To make these adjustments, click on
D/A Trim
on the PC
software Menu Screen and follow the pop-up window
instructions:
3.11 Strapping Table
The strapping table is a 2-point to 21-point table
used by the RCT Series to cause the output current to
follow a specified relationship to the level. There are
certain strapping tables that are already built in to
the transmitter software. These are: Linear (vertical
tank); Horizontal Tank with flat ends; Horizontal Tank
with dished ends; Horizontal Tank with hemispherical
ends; and Spherical Tank. These predefined tables are
automatically created by selections made with Vessel
Configuration assignments during Configuration
procedure in Section 3.7.2, and viewed by clicking the
Strapping Table
"button" on the Main menu.
If the output-to-level relationship is not defined by one
of these tables, you may create a table in the Strapping
Table program. To create a non-linear relationship, you
will need at least 3 points and may use as many as 21
points. A 21-point table will define the relationship with
more accuracy. A common example for a simple table
would be a Cone Bottom Vertical tank which would
require 3 points—the bottom, straight-side break point,
and the top. On the other hand, an open channel flow
application could benefit from using all 21 available
points.
Figure 3-14
Setting D/A Trim Menu Screen
"Pop-Ups"
Summary of Contents for RCT 10 series
Page 4: ......
Page 8: ...SECTION 1...
Page 26: ...SECTION 3...
Page 46: ...SECTION 4...
Page 57: ...Configuration Calibration 49 5 4 Set Up Procedures...
Page 58: ...RCT 10 11 12 13 Series 50 5 4 Set Up Procedures Continued...
Page 59: ...Configuration Calibration 51 5 4 Set Up Procedures Continued...
Page 66: ...SECTION 6...
Page 80: ...SECTION 7...
Page 86: ...APPENDIX A...
Page 87: ...Appendix A A 1 APPENDIX A APPROVAL DRAWINGS A 1 ATEX APPROVAL DRAWINGS...
Page 88: ...RCT 10 11 12 13 Series A 2 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 89: ...Appendix A A 3 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 90: ...RCT 10 11 12 13 Series A 4 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 91: ...Appendix A A 5 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 92: ...RCT 10 11 12 13 Series A 6 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 93: ...Appendix A A 7 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 94: ...RCT 10 11 12 13 Series A 8 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 95: ...Appendix A A 9 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 96: ...RCT 10 11 12 13 Series A 10 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 97: ...Appendix A A 11 A 1 ATEX APPROVAL DRAWINGS Continued...
Page 98: ...RCT 10 11 12 13 Series A 12 A 2 CSA APPROVAL DRAWINGS...
Page 99: ...Appendix A A 13 A 2 CSA APPROVAL DRAWINGS Continued...
Page 100: ...RCT 10 11 12 13 Series A 14 A 2 CSA APPROVAL DRAWINGS Continued...
Page 101: ...Appendix A A 15 A 2 CSA APPROVAL DRAWINGS Continued...
Page 102: ...RCT 10 11 12 13 Series A 16 A 2 CSA APPROVAL DRAWINGS Continued...
Page 103: ...Appendix A A 17 A 2 CSA APPROVAL DRAWINGS Continued...
Page 104: ...RCT 10 11 12 13 Series A 18 A 2 CSA APPROVAL DRAWINGS Continued...
Page 105: ...Appendix A A 19 A 2 CSA APPROVAL DRAWINGS Continued...
Page 106: ...RCT 10 11 12 13 Series A 20 A 2 CSA APPROVAL DRAWINGS Continued...
Page 107: ...Appendix A A 21 A 2 CSA APPROVAL DRAWINGS Continued...
Page 108: ...RCT 10 11 12 13 Series A 22 A 2 CSA APPROVAL DRAWINGS Continued...
Page 109: ...Appendix A A 23 A 2 CSA APPROVAL DRAWINGS Continued...
Page 110: ...RCT 10 11 12 13 Series A 24 A 2 CSA APPROVAL DRAWINGS Continued...
Page 111: ...Appendix A A 25 A 2 CSA APPROVAL DRAWINGS Continued...
Page 112: ...RCT 10 11 12 13 Series A 26 A 2 CSA APPROVAL DRAWINGS Continued...
Page 113: ...Appendix A A 27 A 2 CSA APPROVAL DRAWINGS Continued...
Page 114: ...RCT 10 11 12 13 Series A 28 A 2 CSA APPROVAL DRAWINGS Continued...
Page 115: ...Appendix A A 29 A 3 FM APPROVAL DRAWINGS Continued...
Page 116: ...RCT 10 11 12 13 Series A 30 A 3 FM APPROVAL DRAWINGS Continued...
Page 117: ...Appendix A A 31 A 3 FM APPROVAL DRAWINGS Continued...
Page 118: ...RCT 10 11 12 13 Series A 32 A 3 FM APPROVAL DRAWINGS Continued...
Page 119: ...Appendix A A 33 A 3 FM APPROVAL DRAWINGS Continued...
Page 120: ...RCT 10 11 12 13 Series A 34 A 3 FM APPROVAL DRAWINGS Continued...
Page 121: ...Appendix A A 35 A 3 FM APPROVAL DRAWINGS Continued...
Page 122: ...RCT 10 11 12 13 Series A 36 A 3 FM APPROVAL DRAWINGS Continued...
Page 123: ...Appendix A A 37 A 3 FM APPROVAL DRAWINGS Continued...
Page 124: ...RCT 10 11 12 13 Series A 38 A 3 FM APPROVAL DRAWINGS Continued...
Page 125: ...Appendix A A 39 A 3 FM APPROVAL DRAWINGS Continued...
Page 126: ...RCT 10 11 12 13 Series A 40 A 3 FM APPROVAL DRAWINGS Continued...
Page 127: ...Appendix A A 41 A 3 FM APPROVAL DRAWINGS Continued...
Page 128: ...RCT 10 11 12 13 Series A 42 A 3 FM APPROVAL DRAWINGS Continued...
Page 129: ...Appendix A A 43 A 3 FM APPROVAL DRAWINGS Continued...
Page 130: ...RCT 10 11 12 13 Series A 44 A 3 FM APPROVAL DRAWINGS Continued...
Page 131: ...A 3 FM APPROVAL DRAWINGS Continued...
Page 133: ......
