Product Description; Technical Data; Water Chemistry - Pahlen MiniMaster User Manual

MiniMaster

1. Product description

MiniMaster is an electronic control unit for pH and/or chlorine level measurement and control in a swimming pool.
The pH water value is measured with pH electrode, and chlorine level with a free chlorine or redox electrode.
MiniMaster is connected to an external dosing equipment for dispensing acid or base (pH) and chlorine. In case of abnormal
values, the control unit sends signal to the dosing devices to dispense chemicals into the pool system until the correct level is
reached.
The package includes: Control unit (1) with water measuring fittings, PE hose 2 x 4 m, external prefilter and hose connections.
An electrodes kit is delivered separately: including electrodes, cleaning medium, and pH electrode kit includes pH 7,3 buffer
solution.

2. Technical data

Power consumption - excl. dosing equipment
Power consumption - dosing equipment (max)
Ground current
Voltage
Temperature range
Protection class
Measured L x B x H
Weight

3. Water chemistry

Mini Master continuously measures and displays pool water pH and chlorine levels.
In a private swimming pool, pool water volume is circulated by circulation pump. The total pool water volume should be turned
around at least 3 times a day. Less frequent turn-around times bring the risk of uneven distribution of the pool disinfectants.
Dosing swimming pool chemicals into the pool water can produce different measurement and regulation effects. Dosing chlorine
chemicals affects the pool water pH. High/low pH values can result in misleading chlorine measurements.
In order to maintain a balanced water quality, it is important to follow our recommended values for the pool water, as you can
see below. Values different from the recommended values can result in misleading chlorine and pH contents.
At dosing the pool water, or if it has been previously dosed with organic chlorine (e.g. tablet/puck form), the pool-water most
certainly contains a chlorine stabilizing agent - isocyanuric acid. The agent is responsible for lowering the signal for free chlorine
and redox electrodes at regulating the chlorine value . We recommend, therefore, to dilute the pool water with fresh water or
completely replace all pool water in order to completely eliminate the agent. If there isn´t an opportunity to reduce the agent
content, you find the recommended values for free chlorine, combined with isocyanuric acid below.
A pool that is started for the season or a newly-filled pool (with municipal water or water from your own well) should be
circulated, tempered and processed manually with chlorine and pH stabilizers AT LEAST ONCE A WEEK before Mini Master
can be calibrated in automatic mode.
Mini Master has two options for measuring the pool water chlorine content - free chlorine or redox electrodes: Free chlorine
electrode measures excess chlorine (not yet affected by the pool water agents).
A Redox electrode measures the chlorine effect (disinfectant power of the pool water).
Pool water chemistry can be complicated, but if our recommended values are followed and the owner regularly carries out the
electrodes maintenance and cleaning of all pool filters, MiniMaster can maintain an optimal pool water quality. We recommend
using a digital photometric testing instrument and a regular reference measurement of the pool water
combined with calibration of Minimaster.
Recommended values for water quality at automatic measuring and dosing
Free chlorine - isocyanuric acid content 0 mg/l (ppm)
Free chlorine - isocyanuric acid content max 50 mg/l (ppm):
Combined chlorine:
pH-value:
Alkalinity:
Salinity (chloride content) : - at measuring with free chlorine electrode
Calcium hardness:
Water temperature:
For more details on the pool chemicals and maintenance see Pool Guide on our website
http://www.pahlen.com
MiniMaster MiniMaster
chlorine pH
Item no. 416600 Item no. 416610
2W 2W
100W 100W
220-240V 1~N 50/60Hz
310 x 85 x 500 mm
0.3–1.5 mg/l (ppm)
1.0–3.0 mg/l (ppm)
max 0.5 mg/l (ppm)
7.2–7.4
60–120 mg/l (ppm)
max 800 mg/l (ppm) = 0,08%
100–300 mg/l (ppm)
max +/-2ºC skillnad
3
ENGLISH
MiniMaster MiniMaster
pH + chlorine pH + Redox
Item no. 416620 Item no. 416630
4W 4W
2x100W 2x100W
1 A
0 till +45°C
IP44
2 kg