HP E1313A Manual page 372

Notes
Appendix D
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The < compensation > parameter is used only for custom EU thermocouple
measurements. < compensation
use for reference junction compensation.
following values for thermocouple reference compensation:
Code
0
1
2
3
4
5
6
7
1. The Control Processor needs to " know" the SCP channel gain
settings to properly perform an EU conversion for each channel.
The command reads all channel gains and must be
SCPGAINS
executed once the gains are set and scan lists are defined.
2. Standard thermocouple measurements (except for conversion code F)
are always compensated for the current reference temperature.
3. There are two types of conversions. Most conversions involve a
piecewise linear interpolation from tables stored in RAM. An
alternative conversion method consists of a simple (MX+B )2
computation. This " straight-line" computation is valid for the entire
measurement range of the A/D, and is used for reading voltage and
resistance.
4. It is possible to download tables into RAM by direct memory access
from A24. If a custom downloaded conversion will be used for
channel n , the table for that channel should be loaded into the EU
< >
Conversion RAM at the address corresponding to that channel
number. Contact your HP System Engineer for information on
creating and downloading custom EU conversion tables.
5. All Piecewise EU Conversions have 16-bit dynamic range. Linear
EU conversions have full dynamic range of the HP E1413.
6. Piecewise EU Conversions use y=Mx+B, where x is the low-order
9-bits, and M and B coefficients are fetched based on the high-order
7-bits of the A/D converter reading.
7. Linear EU Conversions use y=Mx+B, where x is the entire 16-bit
A/D reading, M and B are constants.
> specifies which built-in (standard) table to
< compensation >
EU Conversion
No Compensation
J Type Compensation
K Type Compensation
T Type Compensation
E Type Compensation
N Type Compensation
R Type Compensation
S Type Compensation
Register-Based Programming
allows the
E
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