Sentinel Performance Solutions Ltd, The Heath Business & Technical Park
Runcorn, Cheshire, WA7 4QX T: +44 (0) 1928 588330
F: +44 (0) 01928 588368
Page 2 of 4
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.
