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Service Instructions Safety Cabinet HERAsafe KS / KSP
Service Instructions Safety Cabinet HERAsafe KS / KSP
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Test
est measurement
measurement
1.
1. Sw
Swit
itch th
ch the dev
e devic
ice on.
e on.
2.
2. Move th
Move the front wi
e front window to t
ndow to the worki
he working positi
ng position. The
on. The lead tim
lead time
e
for the first measurement is 20 minutes.
for the first measurement is 20 minutes.
3.
3. Instal
Install the me
l the measuring h
asuring head to th
ead to the first m
e first measuring
easuring point.
point.
4.
4. Perform
Perform the mea
the measurement
surement at each m
at each measuring
easuring point fo
point for a
r a
minimum of one minute and record the values.
minimum of one minute and record the values.
5.
5. Calculat
Calculate the ave
e the average valu
rage value for the d
e for the downflow
ownflow velocity
velocity..
Calculating the average value for the downflow velocity
Calculating the average value for the downflow velocity
Sum
Sum of
of measured
measured values
values
Number
Number of
of measuring
measuring points
points
Acceptable values
Acceptable values
Application in USA/Canada (NSF 49):
Application in USA/Canada (NSF 49):
NOTE – Nominal values
NOTE – Nominal values
The nominal values for the individual device
The nominal values for the individual device
types are listed on the nameplate.
types are listed on the nameplate.
The unit is examined as a uniform safety cabinet:
The unit is examined as a uniform safety cabinet:
The average value must be within ± 0.025 m/s (5 ft/min) of the nominal value.
The average value must be within ± 0.025 m/s (5 ft/min) of the nominal value.
The measured values of
The measured values of
each individual measuring point
each individual measuring point
must not deviate
must not deviate
more than 25 % or 16 ft/min (0.081 m/s) from the average downflow velocity.
more than 25 % or 16 ft/min (0.081 m/s) from the average downflow velocity.
The unit is examined as a non-uniform (zoned) safety cabinet:
The unit is examined as a non-uniform (zoned) safety cabinet:
The average value must be within ± 0.025 m/s (5 ft/min) of the nominal value.
The average value must be within ± 0.025 m/s (5 ft/min) of the nominal value.
The measured values of the
The measured values of the
individual measuring rows (zones)
individual measuring rows (zones)
must not
must not
deviate more than 25 %
deviate more than 25 % or 16 ft/min (0.081 m/s) from the average
or 16 ft/min (0.081 m/s) from the average downflow ve-
downflow ve-
locity of each zone.
locity of each zone.
Average =
Average =
Summary of Contents for HERAsafe KS
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