There are over 160 sensors in the IBAL and 130 control and feedback signals. All the signals are identified in a meta data file, MetaData.csv. This file includes:
- measurement_id
- Name of the sensor/control signal
- Examples:
- ahu1_p_down = pressure transducer downstream of AHU1
- v2_pos_c = control signal set the position of Valve2
- v2_pos_fb = feedback signal indicating the actual position of Valve2
- ahu1_out_rtd = temperature measurement at the outlet of AHU1
- ahu1_rh_down = relative humidity measurement at the outlet of AHU1
- ahu1_f_sa = airflow rate in the supply duct to AHU1
- ahu1_fan_power = power consumption of the AHU1 fan
- card
- The data acquisition card connected to the sensor/controller
- physical_channel
- Channel used by the data acquisition system to create the connection to the sensor/controller
- channel_number
- Number associated with the sensor/controller
- measurement_type
- Control
- Differential pressure
- Flow
- Humidity
- Power
- Pressure
- Temperature
- signal_type
- RTD – resistance temperature device; temperature measurement
- AI – analog input
- AO – analog output
- DI – digital input
- DO – digital output
- Subsystem
- AHU1
- AHU2
- Chiller1
- Chiller2
- CondensingLoop
- CoolingLoad
- ExhaustFan1
- ExhaustFan2
- OAU
- PrimaryLoop
- SecondaryLoop
- ThermalStorage
- VAV1
- VAV2
- VAV3
- VAV4
- WaterSideEconomizer
- ZS1
- ZS2
- ZS3
- ZS4
- instrument_m_n
- Manufacturer name of a sensor
- instrument_s_n
- Serial number of a sensor
- calibration_date
- Date of most recent calibration of a sensor
- accuracy_scaled
- Accuracy of the sensor in the scaled units – may be from manufacturer data or based on calibration
- unit_raw
- Unit of the raw measurement
- F
- Hz
- mA
- position
- V
- unit_scaled
- Unit of the scaled measurement
- F
- cfm
- %
- gpm
- psi
- inH2O
- W
- fpm
- A
- mA
- V
- position
- range_lo_raw
- Minimum value of the reading
- range_hi_raw
- Maximum value of the reading
- startup
- Value of the controller at startup
- shutdown
- Value of the controller at shutdown
- scaling_coeff_a0
- Zeroth coefficient of the polynomial equation for converting from raw to scaled values
- Scaled = a0 + a1*raw + a2*raw2
- scaling_coeff_a1
- First order coefficient of the polynomial equation for converting from raw to scaled values
- scaling_coeff_a2
- Second order coefficient of the polynomial equation for converting from raw to scaled values