Chapter 5 Temperature Measurement Module AH04PT/AH08PTG (4) High accuracy The error is ±1°C of a Pt100/Pt1000/Ni100/Ni1000 sensor’s temperature. The error is ±0.1% of a resistance in the range of 0 Ω to 300 Ω. (5) High stability High-level analog parts are used to strengthen the function of automatically filtering 50/60/400 Hz signals, and the function of suppressing noise. (6) Disconnection detection When a sensor is disconnected, AH08PTG-5A gives an alarm or a warning. (7) PID control An object can be maintained at a desired temperature through a PID control action. (8) A module can be set by means of utility software. HWCONFIG is built-in utility software in ISPSoft.
Users can set modes and parameters in HWCONFIG to complete hardware configuration without spending time writing a program to set registers corresponding to functions. 5.2.3 Specifications Electrical specifications 5-39 Number of analog 8 inputs Three-wire configuration: Pt100/Ni100/Pt1000/Ni1000 sensor, and 0~300 Ω input impedance Two-wire/Four-wire configuration: Pt100/Ni100/Pt1000/Ni1000 sensor, and 0~300 Ω input impedance Pt100: DIN 43760-1980 JIS C1604-1989; 100 Ω 3850 PPM/°C Pt1000: DIN EN60751; 1 kΩ 3850 PPM/°C Ni100/Ni1000:
DIN 43760 Applicable sensor Supply voltage 24 V DC (20.4 V DC~28.8 V DC) (-15%~+20%) Connector type Removable terminal block The error allowed is ±1°C of a Pt100/Pt1000/Ni100/Ni1000 sensor’s temperature. The error allowed is ±0.1% of 300 Ω. Overall accuracy Quick mode: Four-wire/Two-wire configuration: 20 ms/channel Three-wire configuration: 200 ms/channel General mode: A conversion time will be gotten after the conversion time of the two channels in a group is added up. Two-wire/Four-wire configuration: 200 ms/channel Three-wire configuration:
400 ms/channel Conversion time An analog circuit is isolated from a digital circuit by a digital integrated circuit, and the analog channels are isolated from one another by optocouplers. Isolation between a digital circuit and the ground: 500 V DC Isolation between an analog circuit and the ground: 500 V DC Isolation between an analog circuit and a digital circuit: 500 V DC Isolation between two group circuits: 500 V DC Isolation between the 24 V DC and the ground: 500 V DC Isolation