Witt MFA 9000 User Manual

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WITT-GASETECHNIK GmbH & Co KG
Salinger Feld 4-8

: +49 (0)2302 89010
www.wittgas.com
Gas Safety- & Control Equipment
D-58454 Witten
Fax: +49 (0)2302 89013
witt@wittgas.com
6.3 Calibration check / Calibration of the selected gas combination

Note!
You can find a more detailed description of operating the MFA 9000 when calibrating in Sec-
tions 7.3.1 – 7.3.4.

Note!
Often a sufficient accuracy is achieved by a single point “Offset calibration”.

Note!
We recommend to use pure carrier gas to perform an “Offset Calibration”.

Note!
We recommend to use a calibration gas concentration close to the end of the desired meas-
uring range to perform a “Gain Calibration”.
If you are in the “Operation Screen” of the MFA 9000:
 Press <UP> to proceed to the “Top Level Main Menu”.
 Press <RIGHT> to select the menu item “Calibration”
 Press <ENTER> to proceed to the “Calibration Menu”.
 Select the menu item “Offset Gas” (Section 7.3.1) and check whether the set concentration
corresponds to the concentration of the calibration gas you intend to use.
 Select the menu item “Gain Gas” (Section 7.3.2) and check whether the set concentration cor-
responds to the concentration of the calibration gas you intend to use.
 Connect the calibration gas for the “Offset Calibration” to the calibration gas inlet (labelled: cal-
ibration gas) at the rear of the analyser.
 Set the ball valve at the front of the analyser to “calibration gas”.
 Proceed as described in Section 7.3.3.
A calibration is only necessary if the actual measured value (Actu.) differs noticeable from the
set setpoint (Targ.).
 After check / calibration set the ball valve at the front of the analyser to “analysis gas”.
If you decide also to perform a “Gain Calibration” following the “Offset Calibration”:
 Remove the calibration gas for the “Offset Calibration” and
connect the calibration gas for the “Gain Calibration” to the calibration gas inlet.
 Set the ball valve at the front of the analyser to “calibration gas”.
 Proceed as described in Section 7.3.4.
A calibration is only necessary if the actual measured value (Actu.) differs noticeable from the
set setpoint (Targ.).
 After check / calibration set the ball valve at the front of the analyser to “analysis gas”.

Note!
A calibration is only valid for the currently selected measuring gas / carrier gas combina-
tion. If you select another gas combination a check / calibration with adequate calibration
gases for that gas combination should be performed.

Witt MFA 9000 Specifications

General

Brand	Witt
Model	MFA 9000
Category	Measuring Instruments
Language	English