The Iso-Tek Room Pressure Monitor is a sophisticated device designed for critical environment monitoring, offering precise control and visibility into room conditions. It integrates a high-resolution 7-inch color touchscreen display, a robust I/O Module, and an advanced pressure sensor kit. The system can monitor up to four rooms simultaneously, providing real-time data on pressure, temperature, humidity, and air change rates.
Function Description
The core function of the Iso-Tek monitor is to maintain and display critical room pressure relationships, particularly in environments like isolation rooms, cleanrooms, and operating theaters. It utilizes a High Pneumatic Impedance Sensor (HPIS) which measures minute airflow changes to determine differential pressure. This architecture, featuring a micro-flow channel and thermal-based flow-through sensors, offers superior performance compared to traditional diaphragm-based sensors.
The system provides visual and audible alarms for various conditions, including high/low pressure, door open events, and sensor faults. These alarms are highly configurable, allowing for custom setpoints, warning bands, and delays to prevent nuisance alarms. The touchscreen display offers intuitive navigation, showing real-time room status, alarm conditions, and mode selections.
Connectivity options include USB and an optional Bluetooth transceiver for local configuration and data access via the Iso-Tek Insight software. For building management system (BMS) integration, the device supports BACnet MS/TP, allowing for seamless communication with central control systems. The I/O Module provides multiple relay outputs for controlling external devices (e.g., alarms, fans) and dry contact inputs for monitoring door switches or other binary signals. Analog outputs are also available for pressure measurement.
Important Technical Specifications
- Pressure Sensor:
- Pressure Range: +/- 0.100"wc (+/- 25Pa)
- Pressure Measurement Resolution: 0.00000335"wc (0.00083Pa)
- Zero Pressure Offset Accuracy: Typical: +/- 0.00016"wc (+/- 0.04Pa)
- Span Accuracy: Typical: +/- 0.75% of reading, Max: +/- 1.5% of reading
- Offset Drift: Typical: +/- 0.00004"wc (+/- 0.1Pa)
- Span Drift: Typical: +/- 0.2% of reading per 18 deg F (10 deg C)
- Long Term Stability: Max: +/- 0.1% of reading per 18 deg F (10 deg C), +/- 0.000003"wc (+/- 0.0007Pa) per year max
- Display (Local HMI):
- Display Type: 7" LCD-TFT Resistive touch display with LED backlight
- Color: RGB 65K colors
- Active Area: 6.49" x 3.93" (164.9mm x 100mm)
- Resolution: 800 x 480 pixel
- Speaker: Audible notifications, 550-18KHz, 83dBA SPL @ 1W/0.5M
- Connections: RJ-45 connector (to IO Module), USB 2.0 (to PC), USB-C (to PC)
- Operating Temp Range: -4 to 176 deg F (-20 to 80 deg C)
- Storage Temp Range: -40 to 185 deg F (-40 to 85 deg C)
- Humidity: 10 to 95% noncondensing
- IO Module:
- System Input Power: 24VAC +20/-10%, 22VA, 50-60Hz or 24 VDC +/- 10%, 10W
- Relay Outputs: 2 Independent SPDT Relay Contacts (Software Configurable), Contact Rating: 2A @ 30VDC, 0.5A @ 125VAC, 0.3A @ 250VAC
- Analog Outputs: 2 Analog Outputs for Room Pressure (Software Configurable), 0-5V, 1-5V, 0-10V, 2-10V, 0-20mA or 4-20mA
- Dry Contact Input: 2 Dry Contact Input for Primary Room Door Switch (Software Configurable)
- Accutrol Sensor Port: 4-pin, plugged-in screw terminal
- Accutrol Display Port: RJ-45 connector
- BACnet MS/TP (Optional): 1/8 unit load transceiver impedance, Full Master Node State Machine, Selectable Baud Rate: 9600, 19200, 38400, 76800 and 115200
- Bluetooth (Optional): Bluetooth version 4.2 or later
- Operating Temp Range: -4 to 176 deg F (-20 to 80 deg C)
- Storage Temp Range: -40 to 185 deg F (-40 to 85 deg C)
- Humidity: 0 to 95% noncondensing
- Wiring: Twisted-pair, 18-22AWG for 24V Input Power, Relay Outputs, Dry Contact Inputs, and Analog Outputs. Twisted-shielded-pair, low capacitance com cable for BACnet MS/TP. Windy City Wire # 042003 or Equivalent for Accutrol Pnet Sensor Network.
Usage Features
- Multi-Room Monitoring: Capable of monitoring up to four rooms, with individual configuration for each.
- Insight Software: A PC-based software tool for comprehensive configuration, data logging, and device management. It allows users to set up room names, pressure polarity, display positions, alarm modes, and BACnet parameters.
- Mode Management: Users can define and enable multiple operating modes (e.g., OCCUPIED, DECON, CLEAN, UNOCC, ENERGY), each with customizable alarm types and room applicability. Mode timeouts can be set to revert to a default mode after a specified period.
- User PIN Codes: The system supports an Admin Password and up to 10 unique User Pins, allowing for controlled access to mode changes and configuration settings from the touchscreen display.
- Alarm Configuration: Highly flexible alarm settings including warning bands, in/out delays, mute reminder intervals, and mute expiration times. Door open alarms can also be enabled with customizable delays.
- Balancer Pressure Offset: A tool within the Insight software for field calibration, allowing users to adjust pressure readings to match a balancer measurement. This feature includes steps for acquiring pressure readings and entering balancer measurements.
- Measurement Units: Users can select preferred units for pressure ("WC or Pa), temperature (Degree F or C), and flow (CFM or L/S) for both BACnet and display.
- Real-Time Clock (RTC): An on-board RTC with battery backup ensures accurate timekeeping for event logging.
Maintenance Features
- No Preventative Maintenance: The Iso-Tek system is designed to require no preventative maintenance.
- Sensor Certification: Sensor Probes can be returned to the factory for recertification if required.
- Touchscreen Cleaning: The touchscreen display can be cleaned with a damp cloth and then air-dried or wiped with a dry cloth.
- RTC Battery Replacement: The RTC battery needs replacement every 5 years. The system provides a notification when replacement is due, with instructions on the screen.
- Event Log: The device maintains an event log of up to 1000 entries, recording notable events with timestamps. A blinking folder icon indicates when the log is full, allowing users to view or download it via Insight software.
- Sensor Fault Alarm: The system provides an alarm if communication with a pressure sensor is lost, helping to diagnose issues like damaged cables or dislodged connections.
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