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Sentinel Performance Solutions Ltd, The Heath Business & Technical Park 
Runcorn, Cheshire, WA7 4QX T: +44 (0) 1928 588330

 F: +44 (0) 01928 588368 

 

 

 

 

 

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june-10

 

Technical Information 

Measured pH Level 

Recommended Actions 

Greater than 8.5 

The cleaner has not been flushed from the system correctly.  
Ideally the system should be drained, flushed and refilled 
with Sentinel R100. 

7.5 - 8.5 

pH is satisfactory. No action required. 

7.0 – 7.4 

pH is below ideal and more frequent checks are 
recommended 

Less than 7.0 

pH is too low indicating that the thermal fluid has 
deteriorated beyond an acceptable condition. System must 
be drained and cleaned with a suitable system cleaner. 

 

Refill with Sentinel R100

 

 

 

7.  After a clean has been performed with a 

suitable cleaner, measure the pH of both the 
mains water and the final flushing water.  

Ensure the pH of the final flushing water 
is the same as the mains water.

  

Compass 

The compass can be used to check the 
orientation of the solar plate collectors. Ideally 
they should be installed such that they are facing 
in a southerly direction or as close to it as 
possible. 

Instructions for use of Infrared 
Thermometer 

Operation 

1.  Point the unit at the surface to be measured. 

You must ensure that the detection area you 
want to measure is larger than the light spot 
size to get a correct reading.  The light spot is 
used for aiming at the target. 

2.  Press the button and the temperature reading 

will be updated on the LCD. When the 
operator releases the button, the reading will 
automatically be held on the LCD for 10 

seconds. After 10 seconds the thermometer 
will power down. 

3.  The temperature units can be changed by 

using the 

o

C/

o

F switch. 

Measurement Notes 

  If the surface of the object under test is 

covered in oil, grime etc clean before 
taking measurements. 

  If the surface of the object is highly 

reflective, apply masking tape to the 
surface before measuring. 

  Steam, dust, smoke can obscure 

accurate measurements. 

Battery Replacement 

When the low battery symbol appears on the 
LCD, replace the meter’s 1.5V batteries. Detach 
the battery compartment cover by pushing the 
engraved pattern on the handle and pull down.  
Replace the 1.5V x 2 batteries with new ones 
and replace the battery compartment cover. 

Содержание SolarCheck

Страница 1: ...tlet thermal fluid pipework as it enters and leaves the hot water storage tank and again record on the SolarCheck Survey Sheet 3 Using the radiator key take a sample of the thermal fluid from a suitable drain valve on the system Discard the first bottleful and refill the bottle Take appropriate care to avoid burns by using heat resistant gloves if it is appropriate to do so 4 Record the appearance...

Страница 2: ... such that they are facing in a southerly direction or as close to it as possible Instructions for use of Infrared Thermometer Operation 1 Point the unit at the surface to be measured You must ensure that the detection area you want to measure is larger than the light spot size to get a correct reading The light spot is used for aiming at the target 2 Press the button and the temperature reading w...

Страница 3: ...re that the sample is cooled to ambient temperature and repeat steps 1 3 above Take the reading at the point where the blue and white boundary occurs on the propylene glycol scale This will represent the antifreeze content of the thermal fluid Warning Maintenance 1 Do not expose the instrument to damp working conditions and do not immerse the instrument in water If the instrument becomes foggy wat...

Страница 4: ...Point as measured using the DIN 51583 method The Setting Point is the temperature at which the fluid solidifies The temperature figure read from the refractometer corresponding to the percentage glycol figure is the onset of the freezing point as measured using the ASTM D1177 method For a propylene glycol water mixture at temperatures between its Freezing Point and its Setting Point the mixture be...

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