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Preparing adjustment:
1. Connect the pressure regulator to the test gas cylinder.
2. Mount the calibration adapter on the sensor.
3. Connect the hose to the plug nipple connection.
4. Open the menu (see "Opening menus", page 15).
Polytron 57x0 IR
See figure B on the fold-out page.
Adjustment equipment:
– Dräger pressure regulator (1), use a stainless steel
pressure regulator for reactive gases
– Dräger calibration adapter (5) (part number 6811610)
– Hose (3)
– Dräger test gas cylinder (4)
Preparing adjustment:
1. Connect the pressure regulator to the test gas cylinder.
2. Fit the calibration adapter to the splash guard so it snaps
into place.
This does not apply for mounting on ducts or if a process
adapter or process cuvette is used (see installation
instructions for the corresponding PIR 7x00 accessory).
3. Ensure that the sealing surfaces around the openings of
the splash guard are clean. The insect guard does not
have to be removed.
4. Connect the hose to the plug nipple connection.
5. Open the menu (see "Opening menus", page 15).
8.7
Zero calibration
8.7.1 General information
Ambient air can be used to calibrate the zero-point of the
sensor instead of nitrogen or synthetic air only if the ambient
air is known to be free of the target gas and any other gas to
which the sensor may be cross-sensitive (as listed on the
sensor data sheet). In this case, no cylinder or calibration
adapter is needed for the zero calibration.
WARNING
Calibration fault at zero calibration
Insufficient ambient air flow may cause calibration errors.
► Make sure that the ambient air flow to the sensor is
sufficient.
®
Polytron
5100 EC-specific:
Zero adjustment is not possible for oxygen (O
this function is not displayed in the menu.
®
Polytron
5200 CAT-specific:
Sensors must not be calibrated with pure nitrogen. Catalytic
sensors need oxygen to work properly.
®
Polytron
5720 IR-specific:
For Polytron 5720 IR (with PIR 7200 to detect carbon
dioxide), only Nitrogen or Synthetic Air without any CO
content may be used for a zero calibration.
Instructions for use
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Dräger Polytron 5000 Series
8.7.2 Performing zero adjustment
Prerequisites:
– Sensor has finished the warm-up phase
– Calibration is prepared.
All instruments except the Polytron 57x0 IR
1. Select -0- Adj and confirm with [OK].
The maintenance signal is transmitted via the analog
The current value flashes on the display (e.g. 2).
2. If ambient air cannot be used, use synthetic air or
nitrogen.
a. Set the gas flow corresponding to the sensor used
After the test gas has been applied to the sensor for
3 minutes and the displayed value is stable, perform
adjustment.
3. Tap [UP] / [DOWN] to set the value to 0.
4. Confirm with [OK].
The zero-point is adjusted and the menu is displayed
5. Turn off the gas flow and remove the calibration adapter
from the sensor or disconnect the hose.
Polytron 57x0 IR
1. Select -0- Adj and confirm with [OK].
The maintenance signal is transmitted via the analog
Continuous dashes are shown on the display, which
2. If ambient air cannot be used, use synthetic air or
nitrogen.
a. Set the gas flow corresponding to the sensor used
After the test gas has been applied to the sensor for
3 minutes and the displayed value is stable, perform
adjustment.
3. Tap [OK].
If the adjustment was successful, the reading on the
– If [OK] is not tapped again within approx. 5 minutes,
) sensors, so
2
– Tapping [UP] cancels the adjustment. The menu is
4. Confirm with [OK].
The zero-point is adjusted and the menu is displayed
5. Turn off the gas flow and remove the calibration adapter
from the sensor or disconnect the hose.
2
interface. No alarms or fault relays are switched.
(see "Gas flow for adjustments", page 16).
again.
interface. No alarms or fault relays are switched.
then alternates between CAL and the current value
(e.g. 0.1).
(see "Gas flow for adjustments", page 16).
display alternates between CAL and OK. Otherwise, it
alternates between CAL and FAIL.
the instrument pauses and the reading on the display
alternates between CAL and FAIL.
displayed again.
again.
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Calibration
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