HT instruments HT204 - Manual (Page 6)

HT204
EN - 5
4. OPERATING INSTRUCTIONS
4.1. MEASUREMENT DESCRIPTION
1. Press the power key to turn on the meter
2. Press the key to select W/m
2
or BTU/(ft
2
*h) measurement
3. Remove the protection cap of the photo detector and expose it to the light source in
horizontal position. Read the sunlight value on the LCD display
4. Wait for values to be stable on the display. Press “D-H” key to activate the DATA
HOLD function blocking the result on the display
CAUTION
If the instrument displays "OL", the input signal is too strong. A higher range
must be selected.
5. When the measurement is completed, fit the photo detector cap and check that the
indication value should be “000” regardless of the range. If no, adjust the “ADJ” trimmer
on “000” before pressing the power key to turn off the meter
5. PREVENTIVE MAINTENANCE
5.1. GENERAL INFORMATION
This is a precision instrument. To guarantee its performances be sure to use it according to
these instructions and keep it stored on suitable environmental conditions Do not expose it to
high temperatures or humidity. Be sure to turn it off after use. If you expect not to use the
instrument for a long period remove batteries to avoid leakages of battery liquid which
could damage the its inner components.
5.2. BATTERY REPLACEMENT
When the low battery indication “ ” is displayed, replace the battery.
1. Switch off the instrument
2. Press the battery cover and push in the direction of the arrow to open
3. Replace the battery with a new one of the same type (9V 6LR61)
4. Replace the battery cover
5.3. CLEANING
To clean the instrument use a soft dry cloth. Never use a wet cloth, solvents or water, etc.
The white plastic lens of the detector should be cleaned with a damp cloth when
necessary.
5.4. END OF LIFE
CAUTION: this symbol indicates that equipment and its accessories shall be
subject to a separate collection and correct disposal.