Calibrating the flowmeter
This option enables flow rate calibration based on the value of a calibrated flow meter. To calibrate the flowmeter:
1.Power down the HP POD 40c G2. For more information, see "Power down procedure (on page 70)."
2.Select Flowmeter Calibration Factor. A keypad appears
3.Enter the calibration factor.
4.Select OK.
5.Select Save to store the new parameters in the system configuration file.
Calibrating the chilled water pressure sensors
This option is available only when the flow rate is zero and the chilled water pressure on the chilled water supply and return lines is less than 12.75 psi. (1.5 bar).
To calibrate the chilled water pressure sensors:
1.Power down the POD. For more information, see "Power down procedure (on page 70)."
2.Vent the exterior chilled water vent valves to relieve pressure.
3.Verify that the ECS Overview screen (on page 43) indicates a flow rate of 0.0 lpm (0.0 gpm).
4.Select Calibrate Chilled Water Pressure Sensors.
5.Note the current calibration factor.
6.Enter 0.1 as the new calibration factor.
7.Select OK.
8.Select Calibrate Chilled Water Pressure Sensor when the button reads Available.
9.Enter the original calibration factor that you noted down in step 5.
10.Select Save to exit.
Calibrating the differential pressure sensors
This option is available only when all fans and the IT load are powered off and there is no air flowing inside the HP POD 40c G2.
To calibrate the chilled water pressure sensors:
1.Power down the POD. For more information, see "Power down procedure (on page 70)."
2.Set the fan speed for each fan control zone to Manual mode and 0% fan speed. For more information, see "Setting the fan controls for each fan control zone (on page 52)."
3.Open the doors for 5 minutes to equalize the pressure between the hot and cold aisles.
4.Select Calibrate Differential Pressure Sensors.
5.Select Save.
6.Set the fan speeds to Auto mode.
Environmental control system 51