5 5041 2E22
(micro switches) which can be set for low and high flow alarm. The readout
has a scale, which shows you the ordered flow range with a multiplier as a
standard. The standard scales have the following designations; for S2/S02 /
S2SS/S02SS the scale goes from the number 4 to 8 (1:2 turndown). This is
the value that you have to multiply the small multiplier (sticker) figure at the
bottom of the scale with, in order to read the actual flow in the values you
have ordered i.e. liters/min, m3/hours, USGPM. etc. (also shown at the
bottom of the scale) For the S25/S05 / S25SS/S05SS, the scale goes from 1
to 5 and hence, this is the value you use together with the multiplier at the
bottom of the scale, to read the actual Flow through the Monitor. For the
S2/S02/S2SS and S02SS with low differential pressure range (12,5 – 50 mbar),
the scale is customized and shows the direct value.
The Control Unit can also be fitted with a special ordered scale (direct reading
scales) as an option, for example, l/min, m3/h, USG/min etc. for easy reading
and then you have no multiplier at the bottom of the scale.
1.2 Specifications
The only flow difference between the S2/S02 and S25/S05 is the turn down of
the flow range i.e. the S2/S02 has a 1:2 turn down (for example; 50 –100
l/min) and the S25/S05 has a turn down of 1:5 (for example; 20 – 100 l/min).
Accuracy: <+/–5% F.S (full scale) within 20-80 % of the chosen Flow range
<+/–10% F.S.(full scale) within 100% of the chosen Flow range
The accuracy stated is achievable if the installation instruction
is followed given in this manual. It is recommended that you
always choose the Flow Range of the Flow Monitor so that the
normal flow is in the middle of the Monitor Flow Range.
Make sure that the expected alarm set points are within the
chosen flow range. For example: If you have a flow of 110
l/min maximum and the normal Flow is at 90 l/min, chose the
Eletta Flow Monitor S2 with a Flow Range of 60–120 l/min.
This will give you the highest accuracy since your flow is in
the middle of the Monitor Flow Range and give you a lower
pressure loss.
Repeatability: < 2 %
Pressure: Max:16 bar, (232 PSI), higher test pressure as an option.
Min: A line pressure of apr.: 0,7 – 1,0 bar (10 – 14,5 PSI) is
required for proper operation.
Temperature: Control Unit
–20°C to 90°C (–4°F to 200°F), standard
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