HT Italia HT204 User manual

©Copyright HT ITALIA 2012 Release EN 1.01 - 09/02/2012
ENGLISH
User’s manual

HT204
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Table of contents:
1. SAFETY PRECAUTIONS AND PROCEDURES.............................................................2
1.1. Preliminary ............................................................................................................2
1.2. During use.............................................................................................................2
1.3. After use................................................................................................................2
2. GENERAL DESCRIPTION..............................................................................................3
2.1. Features................................................................................................................3
2.2. Instrument description...........................................................................................3
2.3. Description of function keys...................................................................................3
2.3.1. ON/OFF key.................................................................................................................. 3
2.3.2. M-H key......................................................................................................................... 3
2.3.3. W/B key......................................................................................................................... 4
2.3.4. D-H key ......................................................................................................................... 4
2.3.5. R key............................................................................................................................. 4
3. PREPARATION FOR USE..............................................................................................4
3.1. Initial......................................................................................................................4
3.2. Power supply.........................................................................................................4
3.3. Calibration .............................................................................................................4
3.4. Storage..................................................................................................................4
4. OPERATING INSTRUCTIONS........................................................................................5
4.1. Measurement description......................................................................................5
5. PREVENTIVE MAINTENANCE.......................................................................................5
5.1. General information...............................................................................................5
5.2. Battery replacement ..............................................................................................5
5.3. Cleaning ................................................................................................................5
5.4. End of life ..............................................................................................................5
6. TECHNICAL SPECIFICATIONS .....................................................................................6
6.1. Characteristics.......................................................................................................6
6.1.1. General data.................................................................................................................. 6
6.2. Environment ..........................................................................................................6
6.2.1. Environmental conditions.............................................................................................. 6
6.3. Accessories...........................................................................................................6
6.3.1. Standard accessories.................................................................................................... 6
7. SERVICE.........................................................................................................................7
7.1. Warranty conditions...............................................................................................7
7.2. Service ..................................................................................................................7

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1. SAFETY PRECAUTIONS AND PROCEDURES
This meter is in compliance with safety standard EN 61010-1 related to electronic
measuring instruments. For your own safety and to avoid damaging the instrument follow
the procedures described in this instruction manual and read carefully all notes preceded
by this symbol . When taking measurements:
•Avoid doing that in humid or wet places
•Avoid doing that in rooms where explosive gas, combustible gas, steam or excessive
dust is present
•Avoid doing that if you notice anomalous conditions such as breakages, deformations,
fractures, leakages of battery liquid, blind display etc
The following symbol is used:
Caution: refer to the instruction manual. An incorrect use may damage the
luxmeter or its components.
1.1. PRELIMINARY
•Before turning on the instrument make sure that the battery is correctly installed.
Replace the battery as soon as the low battery indication (“ ”) is displayed
•Don’t touch the sensor during measurements to prevent any damage due to
contamination or static electricity
1.2. DURING USE
Always keep to the instructions contained in this manual.
CAUTION
An improper use may damage the instrument and/or its components or
injure the operator.
•If the reading value or the sign indication remains unchanged during the
measurement, check if the DATA HOLD function is active
1.3. AFTER USE
•After using the instrument turn it off
•If you expect not to use the instrument for a long period remove the battery to avoid
leakages of battery liquids which may damage its inner components

HT204
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2. GENERAL DESCRIPTION
The digital solar power meter HT204 is used to measure the sunlight. Possible
applications are the evaluation of the solar power in industrial installations (photovoltaic
plants) or its danger level for people’s skin. The sunlight is usually expressed in W/m2or
BTU/(ft2*h).
2.1. FEATURES
•Sunlight measurement up to 1999W/m2/ 634BTU/(ft2*h)
•High accuracy and rapid response
•DATA HOLD function to hold measuring values
•Unit and sign display for easy reading
•Measuring unit selection among W/m2and BTU/(ft2*h)
•Manual scale selection
•Direct reading with no adjustments needed
•Maximum and minimum values
•Low battery indication
2.2. INSTRUMENT DESCRIPTION
LEGEND:
1. DATA HOLD active
2. MAX active
3. MIN active
4. Decimal point
5. Measured value
6. Measuring unit W/m2
7. Measuring unit BTU/(ft2*h)
8. Low battery
LEGEND:
1. ON/OFF key
2. M-H key to select the maximum,
minimum or current reading
3. W/B key to select the measuring unit
W/m2or BTU/(ft2*h)
4. D-H key to hold displayed data
5. R key to select the full scale manually
Fig. 1: Instrument description
2.3. DESCRIPTION OF FUNCTION KEYS
2.3.1. ON/OFF key
Press the key to switch on and off the instrument.
2.3.2. M-H key
By pressing key, maximum and minimum values are measured. The symbol
corresponding to the desired function is displayed: “MAX” for maximum value, “MIN” for
minimum value. To exit this function keep M-H key pressed for at least 1 second.

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2.3.3. W/B key
By pressing key the manual selection of measuring unit is possible. The cyclically
pressure of the key changes the measuring unit among W/m2and BTU/(ft2*h).
2.3.4. D-H key
By pressing key the measured value is frozen on the display where the symbol
"HOLD" appears. Press again D-H to disable this function and resume normal operation.
2.3.5. R key
By pressing key the manual selection of measured range cyclically pressure of the key
changes the measuring range and fix the decimal point on the display.
3. PREPARATION FOR USE
3.1. INITIAL
This instrument was checked both mechanically and electrically prior to shipment. All
possible cares and precautions were taken to let you receive the instrument in perfect
conditions. Notwithstanding we suggest you to check it rapidly (eventual damages may
have occurred during transport – if so please contact the local distributor from whom you
bought the item).
Make sure that all standard accessories mentioned in paragraph 6.3.1 are included.
Should you have to return back the instrument for any reason please follow the
instructions mentioned in paragraph 7.
3.2. POWER SUPPLY
The instrument is powered by batteries (refer to paragraph 6.1.1 for further details on
model, number and battery life). The battery charge is displayed on the right top side.
Replace it immediately, following the instructions given in paragraph 5.2.
3.3. CALIBRATION
The instrument complies with the technical specifications contained in this manual and
such compliance is guaranteed for 1 year.
The calibration interval for the photo detector varies according to the operating conditions,
but generally the sensitivity decreases in direct proportion to the product of luminous
intensity and operating time. In order to maintain the basic accuracy of the instrument, a
periodic recalibration is recommended.
3.4. STORAGE
After a period of storage in extreme environmental conditions exceeding the limits
mentioned in paragraph 6.2.1 let the instrument resume normal measuring conditions
before using it.

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4. OPERATING INSTRUCTIONS
4.1. MEASUREMENT DESCRIPTION
1. Press the power key to turn on the meter
2. Press the key to select W/m2or BTU/(ft2*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.

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6. TECHNICAL SPECIFICATIONS
6.1. CHARACTERISTICS
Accuracy is referred to the following reference conditions: 23 ± 5°C with RH < 70%.
Uncertainty: ± 10 W/m2[ ± 3 BTU/(ft2*h) ] or ± 5%, whichever is greater
Temperature added uncertainty: ± 0.38 W/m2/°C [ ± 0.12 BTU/(ft2*h)/°C] from 25°C
Resolution: 1 W/m2[ 1 BTU/(ft2*h) ]
Range: 1 ÷ 1999 W/m2[ 1 ÷ 634 BTU/(ft2*h) ]
6.1.1. General data
Mechanical characteristics
Size: 172(L) x 60(W) x 38(H)mm; 6,8 x 2,4 x 1,5in
Weight (including battery): About 150g; 5,3ounces
Supply
Battery type: 1 battery 9V type 6LR61
Low battery indication: " " is displayed when the battery is low
Battery life: About 100 hours (carbon zinc.)
Display
Characteristics: 3-1/2 digit LCD, 2000 counts with “OL” indication
Sample rate: 4 times/sec
6.2. ENVIRONMENT
6.2.1. Environmental conditions
Reference temperature: 23° ± 5°C; 73° ± 41°F
Operating temperature: 5° ÷ 40°C; 41° ÷ 104°F
Operating humidity: <80%RH
Storage temperature: -10° ÷ 60°C; 14° ÷ 140°F
Storage humidity: <70%RH
Internal use: Max. 2000m (6561ft), pollution degree 2
This instrument complies with the requirements of the European Directive:
EN61326 (1997) + A1 (1998) + A2 (2001)
6.3. ACCESSORIES
6.3.1. Standard accessories
The packaging contains:
•Instrument HT204
•Carrying case
•Instruction manual

HT204
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7. SERVICE
7.1. WARRANTY CONDITIONS
This instrument is guaranteed against material or production defects, in accordance with
our general sales conditions. During the warranty period the manufacturer reserves the
right to decide either to repair or replace the product.
Should you need for any reason to return back the instrument for repair or replacement
take prior agreements with the local distributor from whom you bought it. Do not forget to
enclose a report describing the reasons for returning (detected fault). Use only original
packaging. Any damage occurred in transit due to non original packaging will be charged
anyhow to the customer.
The manufacturer will not be responsible for any damage to persons or things.
The warranty doesn’t apply to:
•Accessories and batteries (not covered by warranty)
•Repairs made necessary by improper use (including adaptation to particular
applications not foreseen in the instructions manual) or improper combination with
incompatible accessories or equipment
•Repairs made necessary by improper shipping material causing damages in transit
•Repairs made necessary by previous attempts for repair carried out by non skilled or
unauthorized personnel
•Instruments for whatever reason modified by the customer himself without explicit
authorization of our Technical Dept
The contents of this manual may not be reproduced in any form whatsoever without the
manufacturer’s authorization.
Our products are patented and our logotypes registered. We reserve the right to
modify specifications and prices in view of technological improvements or
developments which might be necessary.
7.2. SERVICE
Shouldn’t the instrument work properly, before contacting your distributor make sure that
the battery is correctly installed and working, check the test leads and replace them if
necessary. Make sure that your operating procedure corresponds to the one described in
this manual.
Should you need for any reason to return back the instrument for repair or replacement
take prior agreements with the local distributor from whom you bought it. Do not forget to
enclose a report describing the reasons for returning (detected fault). Use only original
packaging. Any damage occurred in transit due to non original packaging will be charged
anyhow to the customer.
The manufacturer will not be responsible for any damage to persons or things.