Calibration; Calibration Of The Touchscreen; Calibration Of The Rotor - Merck RCS High Flow Touch Bedienungsanleitung

4 Service and Maintenance
4.6

Calibration

4.6.1 Calibration of the Touchscreen

A calibration of the touchscreen is recommended if
the software fails to respond to a clear touch with
appropriate pressure, or if the touch area seems to
move sidewards.
The Menu Service Area provides access to the cali-
bration of the touchscreen.
Calibration icon the touchscreen turns black and a
white cross appears in the upper left corner. Press
the cross with a narrow touch instrument (stylus).
Then, repeat the procedure for all four corners of
the touch area by following the appearance of the
white cross. After the calibration of the touch-
screen is finalized the instrument automatically
returns to the Menu Service Area.

4.6.2 Calibration of the Rotor

®
The RCS High Flow Touch Microbial Air Sampler is
delivered with a calibrated rotor. Optionally, an
instrument can be calibrated with more than one
rotor. For every calibrated rotor a calibration certif-
icate is provided. After first use of the instrument
each rotor must be calibrated at least once a year.
For control of servicing intervals the calibration ex-
piration date for each rotor is stored in the memory
of the instrument. Generally the calibration expira-
tion date of a rotor is set at 365 days (1 year).
84
For determination of the calibration expiration date there are two general pos-
sibilities:
By touching the
If the calibration displays a deviation the calibration can be adjusted within
a range of 20% in 2% increments.
Example for Determination of the Calibration Factor
CF =
Example:
Result of differential measurement (= rotor volume): 97 L/min
Result of sampling time (300 L sample volume): 182.5 s
Correction factor = 0%
Selected sample volume: 300 L
Cf =
CF = + 1.7%
The calibration factor must be adjusted at 2% thus, the calibration factor
is set at +2!
NOTE
• Rotor and instrument are required for a calibration.
• A calibration should is performed at least annually
• A calibration is performed after tearing apart the rotor apart for cleaning
(see chapter 4.4).
• An expired rotor is indicated by the red rotor symbol.
• If an expired rotor is used with QA Level 2­4 an error message is
displayed.
• Measurements with an expired rotor is possible but not recommended.
• The CalibSo Software allows changing of the calibration data.
• A manual calibration is possible in QA Level 1.
• If a manual calibration is performed the time period for expiration is set
according to the last saved values.
(continued)
1 Send instrument and rotor for anual calibration service to your local
Service Provider
2 Perform the calibration yourself by using the HYCON
(Art. No. 1.44205.0001) and optional the CalibSo Software (Art. No.
1.44206.0001). For the detailed calibration procedure please refer to
the user manual of the Anemometer. The calibration factor (Cf) in % is
calculated according to the following formula (for minimum sampling
volume of 300 L is used):
Sampling Volume × 60 (s/min) × 100% – 100%
Rotor volume (L/min) × Sampling Time (s)
300 × 6000 – 100%
97 × 182.5
®
Anemometer