Waltron AQUALERT Aqualyzer 3051, Instruction Manual, Page: 21 / 70

Introduction
20
Waltron User Manual
3051 Hardness Analyzer
2.5
FAST LOOP RESERVOIR
The external reservoir, required for online applications, allows a fast circulation of the sample
coming from the sampling point. Inside the fast-loop reservoir the sample is at atmospheric
pressure and this allows the sample pump to provide the analyzer with a constant delivery of
smaple and no overpressure. In addition, the fast-loop reservoir holds a small additional quantity
of sample to avoid wrong alarms in case of short loss of sample as well as to eliminate air bubbles
from the sample line.

The stainless steel drain tubing keeps a constant water level inside the container and
allows a proper sample circulation to avoid suspended solids accumulation.

The sample flow should be adjusted to have the complete sample overflow through the
U-shaped stainless steel tube. A small hole at the stainless steel tubing allows the fast-
loop reservoir to empty for cleaning purposes just with finger pressure.

Inside the reservoir a level sensor checks for water presence. The loss of sample switch
puts the analyzer into stand-by conditions at the end of the current cycle. When the
sample flow resumes in the reservoir, the analyzer will start automatically with a new
cycle.
NOTE:
In the case of dual stream units, there will be two separate
fast loop reservoirs, one for each of the sample streams.
Figure 2.5: Depiction of the fast-loop reservoir.
Air to
Overflow
Drain
Process
Sample
Overflow
Drain
Sample to
Analyzer
Stream Inlet
Level
Switch
Process
Sample Inlet
(behind
overflow
tubing)