<3. Parameter Setting>
3-18
IM 01C50T03-02EN
IMPORTANT
• This function is only effective when the sensor
type is set to “Sensor Matching”.
• Enter the appropriate R
0
value corresponding to
the sensor type. For example, if you are using
the Pt100, enter a value of approximately 100
Ω for R
0
.
(2) Setting the sensor matching function
(1) Set a sensor type.
Set a sensor type and a number of wire connections
using the following parameters.
Setting
Item
Parameter
for S1
Parameter
for S2
(2-input
model only)
Value to be
selected
Sensor
type
D10:SENSOR1
TYPE
D30:SENSOR2
TYPE
Sensor
Matching
Number
of wire
connections
D11:SENSOR1
WIRE
D31:SENSOR2
WIRE
Set them
according
to the actual
number
of wire
connections.
(2) Setting of Sensor Matching constant
Set each constant using the following parameters.
However, only one pair of A, B and C or one pair of
α, δ and β must be set. The other pair is calculated
automatically by the temperature transmitter, and it
is set automatically.
Constant Parameter
for S1
Parameter
for S2
(2-input
model
only)
Exponent
(Cannot
be
changed)
Factory
default
Setting
example
R
0
D20:S1 R0 D40:S2 R0
Not
applicable
+ 100.00
ohms
+ 100.05
ohms
A
D21:S1 A
IEC
D41:S2 A
IEC
E-3
(10
-3
)
+3.90830
E-3
+3.90800
E-3
B
D22:S1 B
IEC
D42:S2 B
IEC
E-7
(10
-7
)
-5.77500
E-7
-5.80200
E-7
C
D23:S1 C
IEC
D43:S2 C
IEC
E-12
(10
-12
)
-4.18300
E-12
-4.00000
E-12
α
D24:S1
ALPHA
D44:S2
ALPHA
E-3
(10
-3
)
+3.85055
E-3
+3.85000
E-3
δ
D25:S1
DELTA
D45:S2
DELTA
E0
(10
0
)
+1.49979
E0
+1.50700
E0
β
D26:S1
BETA
D46:S2
BETA
E-1
(10
-1
)
+1.08634
E-1
+1.00000
E-1
IMPORTANT
When entering R
0
, α, δ, β, A, B, C in the YTA, the
following restrictions apply.
• α, δ, β, A, B and C must be normalized with
the value of the exponent determined for each
constant. The number of decimal places that
can be entered is five. Since the position of the
decimal point is fixed, pad it with zeros if lower
digits are unnecessary. (See the above setting
example.)
• The decimal point can be set arbitrarily for
R
0
. However, the input possible range is from
+0.0000 to +32000.
NOTE
If a value that has significantly deviated from
the factory default value is set for each sensor
matching constant, an “AL.07 Temp R-Calc
Fail” alarm may occur. In such a case, set the
correct constant again or change the sensor
type (to Pt100 for example). In either case, the
temperature transmitter needs to be restarted
afterwards.
3.2.16 CJC Function Selection
For thermocouple input, the terminal temperature
measured by an internal sensor of the temperature
transmitter is used for Cold Junction Compensation
function (CJC function). The constant value set
by the user can be used for the compensation
function in place of the measured terminal block
temperature.
Set the CJC function in the following procedure.
(1) Mode selection of CJC function
Select a mode of CJC function by the following
parameters.
Parameter
Setting
value
Remarks
G10:CJC
SELECT
Internal CJC Perform cold junction
compensation at terminal
block temperature.
Constant
CJC
Perform cold junction
compensation using the
user-specified constant
(temperature).
