8-Channel RTD / Voltage Digitizer
Model 6018
Features
RTD and voltage transducers
Constant current excitation
Gains 1 to 5,000 with 0.05% accuracy
Automatic zero
Four-pole, low pass filter
Simultaneous sampling, 16-bit ADC
Programmable warnings and alarms
Description
The Model 6018 contains eight channels of low-noise, highly stable constant current excitation, programmable gain instrumentation amplifier, filter and sample & hold.
The sample and hold outputs are multiplexed to a 16-bit analog-to-digital converter that connects to the 6000 data bus.
The 6018 is used primarly for resistive temperature devices / RTD) and voltage inputs. The input supports two-wire voltage and RTD and four-wire RTD. It can also be used for three-wire RTD and current excited bridge applications. A 100 Ohm precision resistor is provided that may be substituted for the transducer to produce a calibrated output.
Voltage substitution calibration is also provided.
Specifications Model 6018
| RTD | 10 to 1000 Ohms, four wire with shield |
| Input Range | ±2mV to ±10 Volts full scale. Input protected to ±50 Volts. ±200mV to ±100Volts with optional attenuator. |
| Excitation | 0.5 to 5mA in 0.02mA steps with 10 Volt compliance. |
| Calibration | Voltage substitution with attenuation of 1, 0.1 and 0.01. Single-step resistance substitution calibration, 100 Ohm, ±0.1%. |
| Gains | Programmable from 1 to 5,000 in 1, 2, 3, 5, 10 steps with ±0.05 accuracy. |
| Static Accuracy | Typically ±0.02% for gains 1 to 1,000 following calibration. |
| Common Mode | 110dB @ gain 1,000, ±10 Volts, protected to ±50 Volts. |
| Bandwidth and Filter | 1kHz bandwidth. Four-pole low-pass filter with plug-in modules for 1Hz to 1kHz, 10Hz supplied. |
| Sampling | Up to 10k samples per second per channel. Sample & hold time correlation is Up to 20k samples per second per channel. Time correlation is ±50nS. |
| ADC | 16-bits, two’s complement output. |
| Analog Output | ±3 Volts full scale. |