Ametek Dycor CG1000-RTP User Manual page 41

You will need a mechanical
flow meter to calibrate the
flow sensor.
Calibrate flow sensor
The flow sensor is calibrated at the factory. Only calibrate the flow sensor

if the analyzer loses its EEPROM memory. Always use a mixture of
NOTE nitrogen and oxygen as your carrier gas when calibrating the flow sensor.
1. Open the valve on the mechanical flow meter as far as possible. This
prevents overpressure problems that could damage the analyzer flow
sensor. The pressure into the analyzer must not exceed 5 PSIG (344
millibar).
2. Connect the mechanical flow meter to the outlet port on the back of
the analyzer.
3. From the Setup key menu, select Carrier Gas.
4. Select the Cal Flow Sensor menu option.
5. Enter the flow rate for gases entering the sensor, then press ENTER.
The acceptable range is 150 sccm (± 5 sccm). You must ensure that
gases flow into the analyzer at the same flow rate to produce consis-
tent readings. This applies to both calibration and sample gases.
You are prompted to adjust the flow of gases into the analyzer to the
desired flow rate as defined in Step 5 above.
6. Adjust the flow until it stabilizes at 150 sccm on the mechanical flow
meter, then press ENTER.
Flow Set: x sccm
Adjust mech flow rate
Enter to continue
Controller / User Interface
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