Compur Monitors Statox 506, Operation Manual

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6.4 Sensor Calibration

Sensor and sensor head must have the same temperature!

For calibration you need the Statox 505/506 calibration adapter art # 570505, and an inert gas tube
4x1 mm (i.e. art. # 556710) and span gas (allowable concentration see chapter 12.2). If you are not
sure that the ambient air is clean, you need synthetic air for zero adjustment.

In case the calibration fails for whatever reason, the sensor head will continue to operate with the
existing parameters, but the display will alternate showing the measured value and ZERO ADJ
respectively CALIB until a calibration procedure has been completed.

O
2
sensors do not require a zero adjustment, as their output in pure nitrogen is nearly zero. If you are
not sure that the ambient air is clean and does have 20.9 % oxygen content, you should use synthetic
air for the adjustment. Apply the synthetic air as soon as the CALIB menu has started.

During calibration, the timeout is not active. The automatic return into the measuring mode is disabled!
Calibration procedure:

Enter the CALIB menu and start the zero adjustment. As soon as „000“ is no longer flashing, zero has
been adjusted successfully.

Push the calibration adapter onto the sensor. Connect the span gas cylinder.

Start the gas calibration with ENTER.

As soon as GAS ON appears on the display, turn the gas on. Required flow is ca. 20 l/h (300 ml/min).
If you have to follow a zero emission policy, you can connect an active carbon filter at the adapter
outlet. Take care to avoid a stagnation pressure! The sensor head will detect the gas and confirm with:
GAS.IS.ON .

As soon as the measured value has stabilized, CONCENT? will appear in the display. Confirm with
ENTER and enter the concentration of the span gas you are using in ppm (for O
2
in %Vol). Use the
LEFT / RIGHT arrows to do this. Confirm with ENTER.

The sensor head will confirm a successful calibration with DONE . Push ENTER. Now the display
shows the actual detected concentration flashing. Check the reading.

Remove the calibration adapter and shut the gas off. Let the reading decrease to zero, then push
ENTER in order to enter the measuring mode. If you do nothing, the timeout feature will activate the
measuring mode after 5 min.

In the graph below potential errors are shown in dotted letters. You can find a complete error list in
chapter 10.2!
F
ilter
G
as
Calibration
adapter