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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)