Basic Functions - Endress+Hauser mypro CLM 431 Operating Instructions Manual

mypro CLM 431 / CLD 431 conductive
5.2

Basic functions

Matrix
Function/display
VH
VH
Remote
10
calibration
control
VH
Temperature
coefficient α
11
VH
Temperature
12
compensation
type
VH
Reference temp.
13
VH
Cell constant
15
VH
Line resistance
16
Operating level 2
Endress+Hauser
BASIC FUNCTIONS
1)
This function controls the calibration sequence when
operated via the interface (see chapter 4.6.4 ).
Note:
The measuring system can be calibrated in
the field or via the interface (hand-held
®
HART terminal or Commuwin II).
Entry of linear temperature coefficient for the process in
measuring mode.
Value range:
0 ... 10 % /K
Selection of medium temperature compensation type.
Value range:
nonE
= none
LI N
= linear
nACL
= NaCl
tAb
= α value table
Pur
= pure water NaCl
Reference temperature for automatic temperature
compensation.
Value range:
–35 ... 250 °C
Entry of cell constant or information on cell constant
determined during calibration.
Value range:
–1
0.0025 ... 99.99 cm
Entry of line resistance for conductivity measuring cell.
Note:
The line resistance does not affect the accuracy
in the case of measured values below 1 mS.
With measured values above 5 mS and line
lengths (CYK 71) exceeding 10 m, the error is
greater than 0.5% of the measuring value
and therefore requires compensation.
Note:
The total line resistance of measuring cable
CYK 71 is 0.17 Ω/m.
Value range:
0.00 ... 50 ohms
Function group
Description
Functional description
LM431CE5.CHP
Setting
Default
–
2.10 % / K
linear
25 °C
–1
1cm
0
Customer
29