The Honeywell DR450T-1100-00-001-0-00-0111 is a microprocessor-based circular chart recorder that captures up to four analog traces simultaneously on a single 12-inch (304.8 mm) heat-sensitive thermal chart. The instrument employs a one-pen stylus printhead to eliminate pen alignment errors and compensates for chart dimensional variations caused by temperature and humidity fluctuations. It records alphanumeric data including time, trend lines, range markings, process variable values, and trace identification on blank thermal paper, eliminating the need for pre-printed chart inventory.
## Technical Specifications
• **Chart Format:** 12-inch (304.8 mm) circular, blank heat-sensitive thermal paper
• **Recording Channels:** One to four analog input channels (model-dependent)
• **Accuracy:** ±0.05% full scale
• **Input Signal Types:** Thermocouple (10 types), RTD (Pt100), 0–5 VDC, 0–10 VDC, millivolts (mV), 4–20 mA DC, Radimatic
• **Control Capability:** Integral microprocessor PID controller (available on select models) with 1 or 2 control loops
• **Control Actions:** On-Off, PID-A, PID-B, PD with Manual Reset, 3 Position Step
• **Transmitter Power Supply:** 24 Vdc (all models)
• **Communications:** RS-485 Modbus RTU
• **Alarms:** Two relay outputs available with defined contact ratings for resistive loads
• **Digital Inputs:** Two channels
• **Proportional Output:** Available; includes autotune facility and duplex variations for heat-cool applications
• **Totalization:** Software-configurable for flow and equivalent variables
## Key Features
• Single-stylus thermal printhead eliminates multi-pen alignment drift
• Alphanumeric digital display showing PV, setpoint, controller output, and deviation
• English-language configuration keypad interface
• Temperature and humidity compensation for chart medium
• Microprocessor architecture supports flexible control configurations
## Typical Applications
Food processing, pharmaceutical manufacturing, heat treatment, environmental testing, and water/wastewater treatment operations requiring continuous process documentation and closed-loop control.
## Compatibility & Integration
RS-485 Modbus RTU enables integration with supervisory control systems and networked data acquisition environments.
