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Note 1: For ADT227Ex/ ADT227Ex-S, when the environmental temperature is (-20~+10) °C and (30~50) °C, the temperature coefficient
is:
(1) Measurement of voltage, current, TC and RTD: ±5ppmFS/°C.
Note 2: For ADT227Ex-E, when the environmental temperature is (-20~-10)°C, the temperature coefficient is:
(1) Measurement of voltage, current, TC and RTD: ±5ppmFS/°C.
Note 3: Input characteristics:
(1) Voltage scale: (-300~300)mV input impedance >100MΩ;
(2) Voltage scale: (-30~30)V input impedance >1MΩ;
(3) Current measurement: input impedance <40Ω;
(4) TC measurement: input impedance >100MΩ.
Note 4: The excitation current for RTD measure is 0.2mA, and each position has 4-wire, 3-wire and 2-wire methods. The accuracy is as
follows: (given accuracy data in the table in based on 4-wire)
(1) The accuracy of the 3-wire method is 10mΩ more than the accuracy of the 4-wire method;
(2) The accuracy of the 2-wire method is 50mΩ more than the accuracy of the 4-wire method.
Note 5: Minimum threshold voltage for frequency and pulse measure:2.5V
Note 6: Rising edge and falling edge trigger mode is available for pulse measure.
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