Manual Calibration - YOKOGAWA ZR22G User Manual

CAUTION
• If instrument air is used for the span gas, dehumidify to a dew point of -20°C or less to
remove oil mist and dust before use.
• Insufficient dehumidification or use of dirty air may affect measurement accuracy.
7.12.2

Manual Calibration

Preparing for calibration Implementation
Before performing manual calibration, be sure that the ZA8F Flow Setting Unit zero gas flow
setting valve is fully closed. Open the zero gas cylinder pressure reducing valve so that the
secondary pressure equals sample gas plus approx. 50 kPa (or sample gas pressure plus
approx. 150 kPa when a check valve is used, maximum pressure rating is 300 kPa).
ZH40H Automatic calibration unit can perform manual calibration in the same way. ZR40H valves
(solenoid valve) open and close in conjunction with screen.
Calibration operating instructions assume that the same instrumentation air as the reference gas
is used as the span gas
(1) Home screen > "Calibration" > "Manual calibration" "Span"
Calibration Procedures
n
This manual assumes that the instrument air is the same as the reference gas used for the span
gas. Follow the steps below to conduct manual calibration:
(1) Press the [Setup] key in the Basic panel display to display the Execution/Setup display.
Then select "Calibration" in the Execution/Setup display.
Figure 7.15
(2) When "Span" is selected, screen of the span gas concentration is displayed. Check that the
oxygen concentration value of the span gas on screen matches the oxygen concentration
value of calibration gas to be actually used, and then select "Next"
Figure 7.16
Manual calibration steps
Span gas concentration check
<7. Startup>
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
7-13