Ecotech Acoem Serinus 30 - Page 136

Serinus® 30 User Manual 3.3
Page 136
Equipment Required
• Calibrated Flow Meter
• Gas Cylinder of Zero air and Accessories
• Gas Cylinder of CO and Accessories
Procedure
1. Ensure the gas cylinder is fitted with an appropriate gas regulator with a shut off valve.
2. Connect a 1/4” line of stainless steel tubing between the appropriate gas cylinders and the
instrument’s Pres In Port and Calibration Port.
3. Open the cylinder main valve and adjust the regulator to 15 psig.
4. Open the regulator’s shutoff valve and test for leaks:
a. Pressurise the line.
b. Close the cylinder main valve.
c. If pressure drops by more than 2 PSI over 5 minutes, check the connections and retest.
d. Open cylinder main valve.
5. Temporarily place a flow meter on the Vent Port (This port is now used as the high pressure
calibration vent for both span and zero).
6. Open - Main Menu → Calibration Menu.
7. Select - Cal. Type → Manual - Accept.
8. Select - Cal. Mode → Zero - Accept.
Note: When using the high pressure zero option, ensure Zero Source is set to External.
9. Adjust the regulator pressure until the flow meter on the Vent Port is between 0.5 and 1 slpm. This
is the excess calibration gas.
Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas
leakage.
10. Select - Cal. Mode → Span - Accept.
11. Adjust the regulator pressure until the flow meter on the Vent Port is between 0.5 and 1 slpm. This
is the excess calibration gas.
Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas
leakage.
Note: This connection may need to be retightened during this operation.