Battery Check; Pressure Drop - Wohler SWF 233 Bedienungsanleitung

5. Pressure drop

4.2 Battery check

When turning on the instrument the display shows the voltage of the batte-
ry. A fully charged instrument shows approximately 5.7 V. When the supply
voltage is lower than 4.6 V, a battery symbol will be visible on the display and
the instrument can be used for another 15 minutes. When the supply voltage
is lower than 4.2 V, the instrument will be automatically shut off.
5. Pressure drop
The pressure drop over the hood is low but the flow can be reduced if the
pressure drop over the valve is low. If the pressure drop over the hood is lar-
ger than 5% of the pressure drop over the valve, adjustment of the measured
value can be made according to the diagram below.
Correction table:
A= Pressure drop over the hood in % of the pressure drop over the valve
B= Correction factor (multiply read value with B)
A%
5
10
20
Figure 5.1 The pressuredrop over SWF 233
14 Hotline: +49 2953 73-211
B=
1.01
1.05
1.11
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SWF 233