KROHNE OPTISENS AAS 2000 EN - Manual (Page 25)

OPERATION
5
25
OPTISENS AAS 2000
www.krohne.com 12/2008 • MA AAS 2000 R01 en
5.3 Calibration
Leave the instrument turned on for about 30 minutes prior to calibration so that the sensor and
electronics can stabilize.
5.3.1 Zero calibration
The sensor is zero calibrated at the factory and does not often need to be zero calibrated. We do
however recommend to do a new zero calibration when replacing the electrode since half the job
is then already done.
Running a zero calibration
• Remove the electrode before performing a zero calibration ( on page 12).
• Select the sensor to be calibrated in the menu by using ↑ or ↓.
• Press ^ for approximately 5 seconds to enter the sensor menu.
• Select Calibrate Calibrate Calibrate Calibrate and then press ^.
• Select Zero Zero Zero Zero by using ↑ or ↓ and then press ^.
• Wait for the zero calibration to finish (usually takes about 20 seconds).
i A dialog box saying "Calibration done" will come up after successful calibration
• Press ^ to return to the previous menu.
i The sensor is zero calibrated.
• Continue with air calibration ( on page 25).
5.3.2 Air calibration
Please observe the following points while performing an air calibration:
• It is important to create a constant environment.
• The electrode cartridge must be dry with no water drops on the membrane.
• If rain and/or strong winds are present, the calibration procedure could be disturbed. In this
case shield the equipment so that it is protected from the rain or wind.
• An open plastic bag over the sensor may slow the calibration time down, but is otherwise a
good way to create constant conditions.
INFORMATION!
Detailed procedures for navigating the converter software can be found in the MAC 080 manual.
.book Page 25 Monday, December 15, 2008 12:43 PM