YOKOGAWA Daqstation DX2000, User Manual

Page: 346 / 366

13-22
IM 04L42B01-01E
Item Specifications
Measuring accuracy in case of scaling
Accuracy during scaling (digits) = measurement accuracy (digits) × mult 2 digits (rounded up)
* Fractions rounded up
where the multiplier = scaling span (digits)/measuring span (digits).
Example For 1-5 V range (A/D integration time is 16.7 ms or more), measurement span of 1.000 to
5.000 V, and scaling span of 0.000 to 2.000
The measuring accuracy for 5 V input is as follows.
Measuring accuracy (1-5 Vrange) = ±(0.05% × 5 V + 3 digits) = ±(0.0025 V [3 digits] + 3
digits) = ±6 digits
Multiplier = {2000 digits (0.000 to 2.000)}/4000 digits (1.000 to 5.000) = 0.5
Thus, accuracy during scaling = ±(6 × 0.5 + 2) digits = 5 digits (rounded up)
Reference junction compensation accuracy
When measuring temperature greater than or equal to 0 °C and when input terminal temperature is balanced
Type R, S, W, WRe: ±1.0°C
Type K, J, E, T, N, L, and U: ±0.5°C. Type B: Internal reference compensation is fixed to 0°C
Maximum input voltage ±60 VDC (continuous)
Input resistance 200 mV range or less and TC: 10 MΩ or more
2 V range or higher: Approx. 1 MΩ
Input source resistance
Volt, TC 2 kΩ or less
RTD input 10 Ω or less per wire (The resistance of all three wires must be equal).
Bias current 10 nA or less (except when burnout detection function is enabled)
Maximum common mode noise voltage
250 VACrms (50 Hz/60 Hz)
Maximum noise voltage between channels
250 VACrms (50 Hz/60 Hz)
Interference across channels
120 dB (when the input source resistance is 500 Ω and the input to other channels is 60 VDC)
Common mode rejection ratio
When the A/D integration time is 20 ms
120 dB (50 Hz ± 0.1%, 500 Ω unbalanced, between the minus terminal and ground)
When the A/D integration time is 16.7 ms
120 dB (60 Hz ± 0.1%, 500 Ω unbalanced, between the minus terminal and ground)
When the A/D integration time is 1.67 ms
80 dB or higher (50/60 Hz ± 0.1%, 500 Ω unbalanced, between the minus terminal and ground)
Normal mode rejection ratio
When the A/D integration time is 20 ms
40 dB or more (50 Hz ± 0.1%)
When the A/D integration time is 16.7 ms
40 dB or more (60 Hz ± 0.1%)
When the A/D integration time is 1.67 ms
Not reject 50/60 Hz
Effects of Operating Conditions
Item Specifications
Ambient temperature (applies when the A/D integration time is 16.7 ms or greater, with temperature variation of 10°C)
DC voltage, TC range ±(0.1% of rdg + 0.05% of range) or less
* Excluding the error of reference junction compensation
RTD range ±(0.1% of rdg + 2 digits) or less
Power supply fluctuation With variation within 90 to 132 V and 180 to 250 VAC (50/60 Hz):
Accuracy specifications are satisfied.
With variation of ±2 Hz from rated power frequency (power supply voltage 100 VAC):
Accuracy specifications are satisfied.
Magnetic field AC (50/60 Hz) and DC 400 A/m fields:±(0.1% of rdg + 10 digits) or less
Input source resistance
DC voltage range With variation of +1 kΩ:
200 mV range or less: ±10 µV or less
2 V range or higher: ±0.15% of rdg or less
TC range With variation of +1 kΩ: ±10 µV or less
RTD range (Pt100) With variation of 10 Ω per wire (resistance of all three wires must be equal): ±(0.1% of rdg + 1 digits)
or less
With maximum difference of 40 mΩ between wires: Approx. 0.1 °C
Effects of vibration Effects from a sinusoidal vibration along all three axis at a frequency between 10 to 60 Hz and an
acceleration of 0.2 m/s
2
: ±(0.1% of rdg + 1 digit) or less
13.6 General Specifications