Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 157)

IM 11M12D01-01E 9-7
9. Calibration
3) Calibration time setting
If the mode is [Man]:
Select [Hold time]. This is the output stabilization (settling) time required from calibra-
tion end until measurement mode is reentered. During this time, the calibration gas is
switched to measurement gas and the measurement is allowed time to stabilize. Setting
range is from 00min. 00 sec. to 60 min 59 sec. The analog outputs of individual chan-
nels which are under calibration remain in Output Hold status from the start of calibra-
tion until the end of the stabilization (settling) time, and their output is not included in
averaging group calculations during this time.
If the mode is [Semi-Auto]:
In addition to the above [Hold] output stabilization (settling) time, there is also a [Cal.
time] setting. This is the settling time from when calibration gas flow is started until
calibration is performed. The same time settingis used for both Zero and Span calibra-
tion. Setting range is from 00min. 00 sec. to 60 min 59 sec. Calibration time and
stabilization time, and analog output status are shown on the calibration timing chart of
Fig. 9.6 below. For Solenoid Valve (SV) piping and wiring see Sec. 4.2 (on
AutoCalibration).
Ch1 Span CAL
CAL time
Stabilizn.
CAL start
Off On
On Off
Zero gas ON Span gas on Zero gas ON Span gas ON
Cal start in
F9.6E.eps
Ch1 Zero CAL
Ch1 output hold
Ch2 Span CAL
Ch2 Zero CAL
Ch2 output hold
Average output
SV-Ch1 contact
SV-Ch2 contact
SV-Ch2 contact
Ch1 removed from average Ch2 removed from average
Ch.2 Output hold
CAL time
Ch.1 Output hold
CAL time
Stabilizn.
CAL time
Fig. 9.6 Calibration Timing