YOKOGAWA 2553A, Руководство пользователя

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Appendix
App-7
IM 2553A-01EN
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App
Index
Definition Specifications
Item Specifications
Number of user
definitions
Thermocouple user definition (TC USER): 1 set,
RTD user definition (RTD USER): 1 set
Temperature range Lower limit: –9999.9°C, Upper limit: +9999.9°C
Number of
temperature ranges
Up to 100
Output unit TC USER: µV, RTD USER: Ω
Output range TC USER: –120.000 mV to +120.000 mV, RTD USER: 18.00 Ω to 400.00 Ω
Temperature unit
displayed on the
panel
Unit set on the SETUP menu
(User definitions of thermoelectromotive force and resistance are in terms of °C. If the unit is
changed to °F, the temperatures converted to °F will be displayed.)
Polynomial Create TC USER and RTD USER definition expressions using single-variable high-order
polynomials.
Σ
n
i =
0
a
i
t
i
n : Up to 20
a : Coefficient. Can be set using a fixed-point number or floating-point number. If
omitted, it is assumed to be zero.
t
: Temperature
Unit: µV for TC USER, Ω for RTD USER
Limitations on creating polynomials
• It is assumed that the thermoelectromotive force and resistance polynomials will be written
in terms of °C for both TC USER and RTD USER user definitions.
• For TC USER, create the polynomial so that 0 V is output at 0°C.
Syntax Line 1
Line 2
Line 3
Line 4
⁞
Line 101
TYPE:<type><line feed>
<temperature range 1><line feed>
<temperature range 2><line feed>
<temperature range 3><line feed>
⁞
<temperature range 100><line feed>
• Keep the number of characters in line 1 within 512.
• The maximum number of temperature ranges is 100. Temperature ranges beyond 100 are
ignored.
<type> No character or a single ASCII code character in the range of 20 to 7E
(hexadecimal). For the characters that correspond to ASCII codes 20 to
7E, see appendix 7.
<temperature
range 1 to 100>
[Lower limit]
,
upper limit [
,
0th order coefficient [
,
1st order coefficient [
,
2nd order coefficient . . . [
,
20th order coefficient] . . . ]]]
• Use a comma to delimit values.
• Parts in square brackets ([ ]) can be omitted.
Lower limit Set the lower temperature limit of each temperature range. Can be set
using a fixed-point number or floating-point number.
Selectable range:–9999.9°C to +9999.9°C
If omitted, –9999.9°C is set.
If the selectable range overlaps with the next lower temperature range,
the lower limit is set to the same value as the upper limit of the next lower
temperature range.
If the selectable range is higher than the upper limit of the next lower
temperature range, the lower limit is also set to the upper limit of the next
lower temperature range.
Upper limit Set the upper temperature limit of each temperature range. Can be set
using a fixed-point number or floating-point number.
Selectable range:–9999.9°C to +9999.9°C
You cannot omit the upper limit.
Make sure that the lower limit is less than or equal to the upper limit.
nth order
coefficients
Set the nth order coefficients of the polynomial for each temperature
range. Can be set using a fixed-point number or floating-point number.
If omitted, 0 is set.
Up to 21 coefficients can be set. Use a comma to delimit the coefficients.
Set the coefficients so that the thermoelectromotive force or resistance do
not exceed the maximum output.
Appendix 4 User Definitions of Thermocouples and RTDs