TSI Instruments PRESSURA RPC30 User Manual

Part Two
70
4. Select the SIGNAL MIN item and enter the minimum output signal of the transducer. In this
example, you would enter 0 V.
5. Select the SIGNAL MAX item and enter the maximum output signal of the transducer. In this
example, you would enter 10 V.
6. To zero the pressure transducer:
a. Mark the high pressure tubing going to the high port of the transducer.
b. Remove the tubing from the high and low ports of the transducer.
c. Enter the SENSOR ZERO item on the PresSura controller.
d. Reconnect tubing to the high and low ports of the pressure transducer, using the mark to
connect the high pressure tubing to the high port.
Flow Calibration
Flow can be measured using a Pressure Flow Station, Linear Flow Station or Venturi with
feedback.
Pressure Flow Station Calibration
NOTE: Flow stations are optional and may not be installed in your system.
1. Set DUCT AREA item to the duct area where the flow is measured.
2. To Zero the flow station:
a. Mark the high pressure tubing going to the high port of the transducer.
b. Remove the tubing from the high and low ports of the transducer.
c. Enter the SENSOR ZERO item on the PresSura controller.
d. Reconnect tubing to the high and low ports of the pressure transducer, using the mark to
connect the high pressure tubing to the high port.
3. Enter the LOW CAL item to perform the low flow calibration submenu with the following
items:
LOW POS
Damper position for low flow calibration
ZERO VOLTAGE
Voltage from pressure transducer during Flow Station
Pressure Transducer Zero
VOLTAGE INPUT
Current voltage from pressure transducer
ZERO VOLTAGE
Voltage from pressure transducer during Flow Station
Pressure Transducer Zero
CALIBRATED FLOW
Input actual flow as measured with reference instrument here
a. With the LOW POS at 0% (default), observe the VOLTAGE INPUT displayed on the
screen, or use a voltmeter to read the voltage at the pressure input terminals on the back
of the controller.
b. Slowly increase the LOW POS percentage value to adjust the damper position until the
VOLTAGE INPUT (pressure transducer output) shows the first noticeable increase in
voltage from the 0% position. A general rule-of-thumb is that the voltage change should
occur with the damper between approximately 10% to 30% open.
c. For reference only, the UNCALIBRATED FLOW item will display the default measured
flow based on the current settings of the flow station (duct area, etc.).
d. Determine the actual flow with a duct traverse.

TSI Instruments PRESSURA RPC30 Specifications

General

Brand	TSI Instruments
Model	PRESSURA RPC30
Category	Controller
Language	English