Dräger Polytron 5000 User Manual

10 Dräger Polytron 5000
Maintenance
4 Maintenance
Prior to calibration, each sensor must be allowed to warm up
for the length of time specified in the sensor data sheet. During
this time the sensor is capable of detecting the target gas, but
its performance will deviate from specifications. Please see
sensor data sheet for details.
4.1 Calibration procedure for toxic gases
For oxygen sensor see Section 4.2 on Page 11.
Calibration of this instrument must be performed at regular
intervals as detailed in the sensor data sheet.
1 Regulator
2 Calibration gas cylinder
3 Calibration adapter
4.1.1 Zero calibration
1. Attach the pressure regulator to the nitrogen (N
2
) or Zero
Air calibration gas cylinder.
2. Fit the calibration adapter tightly to the end of the sensor.
3. Turn the gas on.
4. Scroll through software menu to Zero Adj and tap OK. The
current zero value will be displayed.
5. Wait for the zero to stabilize.
6. Trim the stabilized value to zero on the display using the Up
and Down arrows.
7. Accept the value by tapping OK with the magnetic wand.
8. Turn off the gas flow and remove the calibration adapter
from the sensor
.
4.1.2 Span calibration
1. Attach the pressure regulator to the calibration gas cylin-
der.
2. Fit the calibration adapter tightly to the end of the sensor.
3. Turn the gas flow on.
4. Scroll through software menu to Span Adj and tap OK. The
span value will be displayed.
5. Wait for the span value to stabilize.
6. Trim the stabilized value to the calibration gas
concentration using the Up and Down arrows.
7. Accept the value by tapping OK with the magnetic wand.
8. Turn off the gas flow and remove the calibration adapter
from the sensor.
NOTICE
Allow the gas to flow for at least three minutes before
proceeding.
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NOTICE
Ambient air can be used to zero the sensor instead of
nitrogen or Zero Air if the area is known to be free of
the target gas or any 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.
NOTICE
Allow the gas to flow for at least three minutes before
proceeding.
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Dräger Polytron 5000 Specifications

General

Type	Gas Detector
Housing Material	Aluminum or Stainless Steel
Detection Principle	Electrochemical sensor
Gases Detected	Oxygen, Toxic and Combustible gases
Display	Backlit LCD
Output Signal	4 to 20 mA, HART
Operating Temperature	-40 °C to +65 °C (depending on the sensor)
Ingress Protection	IP66
Approvals	ATEX, IECEx
Humidity	0 to 95% RH, non-condensing