Yokogawa Button Operated MV2000 - Manual (Page 286)

13-18
IM MV1000-01E
Item Specfcatons
Measurement accuracy when scaling
Accuracy during scaling (digits) = measurement accuracy (digits) × multiplier + 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 (1-5V range) = ±(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 (fractions 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°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 (Pt100) 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)
Inter-channel interference 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 (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 (50Hz ± 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
13.6 General Specfcatons