HT instruments HT307 User Manual
ENGLISH
User manual
© Copyright HT ITALIA 2011 Release EN 1.04 - 11/05/2011
HT307
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 ........................................................................................... 4
3. PREPARATION FOR USE .............................................................................................. 5
3.1. Initial ...................................................................................................................... 5
3.2. Power supply ......................................................................................................... 5
3.3. Calibration ............................................................................................................. 5
3.4. Storage .................................................................................................................. 5
4. OPERATING INSTRUCTIONS ........................................................................................ 6
4.1. Measurement description ...................................................................................... 6
5. PREVENTIVE MAINTENANCE ....................................................................................... 6
5.1. General information ............................................................................................... 6
5.2. Battery replacement .............................................................................................. 6
5.3. Cleaning ................................................................................................................ 6
5.4. End of life .............................................................................................................. 6
6. TECHNICAL SPECIFICATIONS ..................................................................................... 7
6.1. Characteristics ....................................................................................................... 7
6.1.1. Spectral sensitivity ......................................................................................................... 7
6.1.2. Photo detector ............................................................................................................... 7
6.1.3. General data .................................................................................................................. 8
6.2. Environment .......................................................................................................... 8
6.2.1. Environmental conditions .............................................................................................. 8
6.3. Accessories ........................................................................................................... 8
6.3.1. Standard accessories .................................................................................................... 8
7. SERVICE ......................................................................................................................... 9
7.1. Warranty conditions ............................................................................................... 9
7.2. Service .................................................................................................................. 9
8. APPENDIX A: RECOMMENDED ILLUMINATION ........................................................ 10
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HT307
1. SAFETY PRECAUTIONS AND PROCEDURES
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
.
Do not use the meter in presence of explosive gas (material), combustible gas (material),
steam or dust.
The followings symbols are 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 photodiode 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.
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
CAUTION
• 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.
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HT307
2. GENERAL DESCRIPTION
HT307 is a precision digital illuminance meter for light measurements (lux, ft), complying
with the CIE (International Commission on Illumination) spectral response.
It’s fully cosine corrected for the angular incidence of light. Compact, tough and easy to
handle.
The photo detector is a very stable long-life silicon photodiode with spectral response filter.
2.1. FEATURES
• Light measuring levels up to 200.000 lux / 20.000 fc.
• High accuracy and rapid response.
• DATA HOLD function to hold measuring values.
• Unit and sign display for easy reading.
• Manual zeroing with trimmer.
• Corrected for spectral relative efficiency.
• Possibility to select the measuring mode in lux or fc scale, alternatively.
• Maximum and minimum values.
• DC analogic output for connection to external datalogger.
• Low battery indication.
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