Azbil DCP31 - Page 222

11-2
Chapter 11. SPECIFICATIONS
Item Specification
Input Input sampling cycle 0.1s
Input bias current Thermocouple, dc voltage input: ±1.3μA max. (at peak value, under
standard conditions)
At 1V min. range: 3μA max.
Input impedance dc current input: 50Ω ±10% (under operating conditions)
Measuring current RTD input: 1.04mA ±0.02mA, current flow from terminal A (under
operating conditions)
Influence of wiring
resistance
Thermocouple, Changes in readout value at wiring resistance of 250Ω
at both
dc voltage input: ends are as follows by input conversion:
 •0to10mV,−10to10mV: Within35μV
 •0to100mV: Within60μV
 •Other: Within750μV
RTD input: ±0.01%FS max. in wiring resistance range 0 to 10Ω
Range of F01, F33, F38, P01, P33 and P38: ±0.02%FS/Ω
max.
RTD input allowable
wiring resistance
•Allowablewiringresistanceis85Ωmax.(includingZenerbarrier
resistance. When Zener barrier is used, this applies only to ranges other
than F01, F33, F38, P01, P33 and P38.
Note that site adjustment is required.)
•RangeofF01,F33,F38,P01,P33andP38are10Ωmax.(Zenerbarrier
can not be used.)
Allowable parallel
resistance
Thermocouple disconnection detection allowable parallel resistance:
1MΩ min.
Max. allowable input Thermocouple, dc voltage input: −5 to +15Vdc
dc current input: 50mAdc, 2.5Vdc
Burnout Upscale and downscale can be internally selected. (dc current input and
dc voltage input of 1V or more are only downscaled.)
Over-range detection
threshold
110%FS min.: Upscaled
−10%FS max.: Downscaled (Note that F50 range is not downscaled.
Lower readout limit of B18 range is 20°C, 68°F.)
Cold junction
compensation accuracy
±0.5°C (under standard conditions)
Influence of surrounding
temperature on cold
junction compensation
±0.2°C (at 0 to 50°C range)
Cold junction
compensation system
Internal/external (0°C only) compensation selectable
Scaling −1999 to +9999U (settable at dc voltage and dc current ranges. Reverse
scaling and decimal point repositioning possible)
Square root extraction Dropout 0.1 to 10.0%, Possible by dc current and voltage ranges
Linearization table
approximation
12 (both line ends fixed, 11 points variable)
Input bias −1000 to +1000U variable
Digital filter 0.0 to 120.0s variable (filter OFF at 0.0)