Yokogawa DR240 - Manual (Page 230)

14-3 IM DR231-01E
Specifications
14
14.1 Specifications of DR130/DR231/DR241 (Style S3)
Measurement interval
DR130 : Selectable from 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 or 60s; max. 2s/20ch (measured with
20ch, filter:OFF, A/D integration time: 20ms(50Hz)/16.7ms(60Hz))
DR231/DR241 : Selectable from 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 or 60s; max. 2s/30ch (measured
with 30ch, filter:OFF, A/D integration time: 20ms(50Hz)/16.7ms(60Hz))
Noise rejection
Rejection by integration type A/D, lowpass filter, or moving averaging.
Input resistance
Min. 10M
Ω at 2V DC or lower and thermocouple range
Approx. 1M Ω at 6V DC or higher.
Insulation resistance
Min. 20M
Ω at 500V DC between the input terminal and ground.
Input bias current
max. 10nA
Dielectric strength
Between input terminals : 1000V AC (50/60Hz) for one minute
Between an input terminal and ground : 1500V AC (50/60Hz) for one minute
Input source resistance
DCV, TC : 2k Ω or lower
RTD : 10
Ω or lower per line (Pt100Ω)
5
Ω or lower per line (Pt50Ω)
1
Ω or lower per line (Cu10Ω)
Temperature coefficient
zero : 0.01% of range/
°C
full span : 0.01% of range/
°C (0.02% of span/°C for CU10Ω)
Thermocouple burnout
Detected in a TC range (On/Off) enabled, current of 4 µA, detectable pulse width of approx. 5ms
2 k
Ω or lower is considered “normal”
100 k
Ω or greater is considered “disconnected”
Detection interval for thermocouple burnout
Detected at each measurement interval.
Input Type
Power monitor
Terminal Configuration
Single-phase use (one channel each for voltage and current): clamp
Three-phase use (three channels each for voltage and current): clamp
Shortest Measurement Interval
2 s
Method of Input
Transformer-isolated input, with isolation between channels (separated channels)
Method of Measurement and Computing
Digital multiplication
Input Ranges
Voltage: 25 or 250 Vrms
Current: 0.5 or 5 A
In three-phase measurement or single-phase three-wire measurement, the current/voltage ranges
are identical between the respective phases or lines (the current/voltage ranges are set in common
between the respective channels).
Measured Frequency Range
45 to 65 Hz
Wiring Methods
DU400-12: Single-phase two-wire
DU400-22: Single-phase two-wire, single-phase three-wire, three-phase three-wire (dual-voltage,
dual-current), three-phase three-wire (triple-voltage, triple-current) and three-phase four-wire