33
2.3.4 Analyzer atmospheric air calibration ("
automatic
")
Automatic analyzer calibration is undertaken:
when the meter is new;
on a shift basis (8 h); and
after replacement of electrolyte, membrane or Teflon film.
The analyzer may be calibrated in atmospheric air of temperature from plus
15 to plus 35
С at 100 % relative humidity. Preferably, calibration is to be
undertaken at room temperature.
Prior to calibration the meter is to be held at room temperature for at least
1 h with AA alkaline dry cells or AA metal hydride batteries.
Prior to calibration the probe is to be fully submerged in distilled water for at
least 10 min at room temperature.
Switch on the analyzer.
1
Press the key . The display shown in Fig. 2.8 shall come up.
Fig. 2.8
2
Move the marker to
AUTOMATIC
command and depress the key
.
The display shown in Fig. 2.9 shall come up.
Fig. 2.9
3
Shake water drops off the probe membrane and place the probe into a
КН-100-19/26 conical flask or a similar vessel filled with water of 3-5 mm
layer as shown in Fig 2.10. The flask is to be inclined at 30-45
angle to
the horizontal so that residual water might flow down the membrane.
RECORD
ENTER
CALIBRATION
►
AUTOMATIC
MANUAL
PLACE PROBE IN AIR AND
PRESS "RECORD/ENTER"
BUTTON
CAL
◄
