ENGLISH User manual ©Copyright HT ITALIA 2011 Release EN 1.
HT4000 Index: 1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................... 2 1.1. 1.2. 1.3. 2. 3. GENERAL DESCRIPTION ........................................................................................... 3 PREPARATION FOR USE ........................................................................................... 3 3.1. 3.2. 3.3. 3.4. 4. Preliminary ...............................................................................................................
HT4000 1. SAFETY PRECAUTIONS AND PROCEDURES This apparatus conforms to EMC standards relating to electronic measuring instruments. For your own safety and that of the apparatus, you must follow the procedures described in this instruction manual and carefully read all the notes preceded by the symbol .
HT4000 2.
HT4000 4. OPERATING INSTRUCTIONS 4.1. INSTRUMENT DESCRIPTION LEGEND: 1. External probe terminal 2. Internal sensor for atmospheric pressure measurement 3. LCD display 4. HOLD/RECALL key 5. MAX MIN key 6. S/ key 7. / UNIT key 8. ESC/REC key 9. T/ key 10. / SET key 11. Sensor fan 12. Sensor for temperature/humidity measurement 13. Probe handle 14. Battery compartment 15. Battery compartment cover 16. External probe input terminal Fig. 1: Instrument description 4.2. DISPLAY DESCRIPTION LEGEND: 1.
HT4000 4.3. FUNCTION KEY DESCRIPTION 4.3.1. T/ key The key T/ has a dual function: ¾ Æ Just press it to turn on the instrument. Press it for a longer time to turn off the instrument. ¾ T Æ If the key is pressed cyclically you can select the quantities on secondary display (temperature, humidity, CMM/CFM and atmospheric pressure). The same key is also used for programming (see § 4.6) 4.3.2.
HT4000 4.3.6. / UNIT key The key / UNIT has many functions: ¾ UNIT Æ Press and hold to select the measuring unit of quantities on the main display (see § 4.4.2) ¾ Æ Just press to confirm selection of the measuring unit ¾ It permits setting the measurement values of the volumetric flow (see § 4.6) ¾ It permits to confirm cancellation of internal memory (see § 4.10) ¾ It permits to activate/disable the automatic shutdown of display backlight (see § 4.4.1) / SET key 4.3.7.
HT4000 4.4. PRELIMINARY OPERATIONS 4.4.1. Activation of display backlight Just press the key / SET to activate or deactivate display backlight which shuts off automatically after approx. 30s. To activate or deactivate the function of display auto power off operate as follows: 1. 2. 3. 4. 5. Press and hold the key / SET to enter the setting mode.
HT4000 4.5. MEASUREMENT OF AIR SPEED AS WELL AS TEMPERATURE/HUMIDITY CAUTION Do not touch the fans in the upper side of the external sensor to avoid any damage. Fig. 3: Measurement of air speed and temperature/humidity 1. Connect the external probe with the upper side of the instrument through the corresponding terminal (see Fig. 1 – part 1) 2. Turn on the instrument pressing the key 3. Set the desired measuring unit relative to measurement of air speed and air temperature/humidity (see § 4.4.2) 4.
HT4000 4.6. MEASUREMENT OF AIR FLOW CAUTION Do not touch the fans in the upper side of the external sensor to avoid any damage. 1. Connect the external probe with the upper side of the instrument through the corresponding terminal (see Fig. 1 – part 1) 2. Turn on the instrument pressing the key 3. Set the desired measuring unit relative to measurement of air speed (see § 4.4.2) 4. Press and hold the key / SET to enter the setting mode 5. Use the arrow keys S or T and scroll “ArEA” 6.
HT4000 4.8. SAVING OF RESULTS The instrument is capable of storing data relative to air speed measurement into the internal memory (max 99 locations). 1. When the result is shown on main display press the key ESC / REC 2. The instrument shows an instantaneous message “Memory” on secondary display as well as the memory location where the result is saved 4.9. RECALL OF RESULTS TO DISPLAY 1. Press and hold the key HOLD / RECALL 2.
HT4000 5. MAINTENANCE 5.1. GENERAL INFORMATION 1. This digital meter is a precision instrument. Whether in use or in storage, please do not exceed the specification requirements to avoid any possible damage or danger during use 2. Do not place this meter in high temperature or expose to direct sunlight 3. Be sure to turn the meter off after use. For long time storage, remove the battery to avoid leakage of battery liquid that would damage the interior parts 5.2.
HT4000 6. TECHNICAL SPECIFICATIONS 6.1. CHARACTERISTICS Accuracy is indicated as [%rdg + values] at 23°C ± 5°C <80%RH Air speed measurement with external probe Meas. units m/s Km/hr (kph) mph Knots (kts) ft/min (fpm) Beaufort Range 0.4 ÷ 25 1.5 ÷ 90 0.9 ÷ 55 0.8 ÷ 48 79 ÷ 4921 1 ÷ 10 Resolution 0.1 Accuracy ±(2%rdg+ 0.2) ±(2%rdg+ 0.8) ±(2%rdg+ 0.4) 1 ±(2%rdg+ 40) -- Airflow measurement with external probe Meas.
HT4000 6.1.1.
HT4000 7. SERVICE 7.1. WARRANTY CONDITIONS This equipment is guaranteed against material faults or production defects, in accordance with the general sales conditions. During the warranty period (one year), faulty parts may be replaced. The manufacturer reserves the right to decide either to repair or replace the product. In case of returning of the instrument, all transport charges must be paid by the customer.
