Submenu » Span Cal - Dräger Polytron 7000 Instructions For Use Manual

Zero-point calibration can be aborted at any time:
Use the » « key to move to » Back « and press the »

Submenu » Span cal. «
The submenu » Span cal. « Contains all functions for calibrating the sensitiv-
ity of the installed sensor.
Sensitivity calibration
Calibration procedure (using an EC–H
Select the menu items » Calibration «, » Span calibration « and » EC–

H S « in this order, pressing the »
2
— The maintenance signal is transmitted on the analogue interface.
— The alarm and fault relays are not triggered.
— The values for the calibration gas are displayed, for example:
Cal. gas : H S
2
Unit : ppm
Concentr. : 000025
— The calibration gas, concentration and unit can be changed:
Select » Cal. gas « and press the »

gas from the list and press the »
Select » Concentr. « and press the »

centration (same procedure as for input of a password).
Select » Unit « and press the »

list and press the »
OK
If the settings agree with the available calibration gas:
Select » Next « and press the »

— The message » Supply gas: H
— Connect calibration gas (see the information in the section "Maintenance"
on page 44) to the sensor.
Select » Next « and press the »

— The current value and the expired time are now displayed.
When the displayed value has stabilised:
Select » Accept value « and press the »

— In the display the maximum value and the current value as well as the re-
mainder of the sensor vitality are represented as a bar indication.
S sensor as an example):
2
« key after each selection.
OK
« key. Select the desired calibration
OK
« key again.
OK
« key. Set the calibration gas con-
OK
« key: Select the desired unit from the
OK
« key again.
« key.
OK
S with flow rate 500 ml/min « is displayed.
2
« key.
OK
« key.
OK
« key.
OK
The menu » Calibration «
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