HT instruments HT4000 User Manual

ENGLISH

User manual

©Copyright HT ITALIA 2011 Release EN 1.02 - 28/12/2011

HT4000

Index:

1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................... 2

1.1. Preliminary ........................................................................................................................ 2

1.2. During use ......................................................................................................................... 2

1.3. After use ............................................................................................................................ 2

2. GENERAL DESCRIPTION ........................................................................................... 3

3. PREPARATION FOR USE ........................................................................................... 3

3.1. Initial .................................................................................................................................. 3

3.2. Power supply ..................................................................................................................... 3

3.3. Calibration ......................................................................................................................... 3

3.4. Storage .............................................................................................................................. 3

4. OPERATING INSTRUCTIONS ..................................................................................... 4

4.1. Instrument description ....................................................................................................... 4

4.2. Display description ............................................................................................................ 4

4.3. Function key description .................................................................................................... 5

4.3.1. T/ key .................................................................................................................................... 5

4.3.2. HOLD / RECALL key .................................................................................................................. 5

4.3.3. S/ key .................................................................................................................................... 5

4.3.4. MAX MIN key .............................................................................................................................. 5

4.3.5. ESC / REC key ........................................................................................................................... 5

4.3.6. / UNIT key ............................................................................................................................. 6

4.3.7. / SET key ................................................................................................................................ 6

4.3.8. Check of displayed symbols as well as Firmware version ......................................................... 6

4.4. Preliminary operations ....................................................................................................... 7

4.4.1. Activation of display backlight ..................................................................................................... 7

4.4.2. Change of measuring unit .......................................................................................................... 7

4.5. Measurement of air speed as well as temperature/humidity ............................................. 8

4.6. Measurement of air flow .................................................................................................... 9

4.7. Measurement of atmospheric pressure ............................................................................. 9

4.8. Saving of results .............................................................................................................. 10

4.9. Recall of results to display ............................................................................................... 10

4.10. Cancellation of internal memory ...................................................................................... 10

5. MAINTENANCE ......................................................................................................... 11

5.1. General information ......................................................................................................... 11

5.2. Battery replacement ........................................................................................................ 11

5.3. Cleaning .......................................................................................................................... 11

5.4. End of life ........................................................................................................................ 11

6. TECHNICAL SPECIFICATIONS ................................................................................ 12

6.1. Characteristics ................................................................................................................. 12

6.1.1. General data ............................................................................................................................. 13

6.2. Environmental conditions ................................................................................................ 13

6.2.1. Climatic conditions .................................................................................................................... 13

6.3. Accessories ..................................................................................................................... 13

7. SERVICE .................................................................................................................... 14

7.1. Warranty conditions ......................................................................................................... 14

7.2. Service ............................................................................................................................ 14

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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 .
Strictly keep to the following instructions before and during measurements:

• Do not effect measurements in environments with explosive gas, fuels or dust

• Do not submit the measuring probe to excessive mechanical stress

• Do not touch the probe inner fan to avoid damaging it

• Do not effect any measurement in case of unusual conditions of the instrument such as

deformation, breakage, leakage of substances, absence of display reading etc.

The following symbols are used on the instrument and in this manual:

Caution: refer to the instructions reported on this manual; improper use may
damage the apparatus or its components.

1.1. PRELIMINARY

• Use the meter only as specified in this manual; otherwise, the protection provided by
the meter may be impaired.

• Only the accessories supplied with the instrument guarantee compliance with the
safety standards. They must be in good conditions and must be replaced, if necessary,
with identical models.

• Do not effect measurements beyond the limits specified in this manual.

• Check that batteries have been placed correctly.

1.2. DURING USE

Carefully read the following recommendations and instructions:

CAUTION

No compliance with the Warnings and/or Instructions may damage the
apparatus and/or its components or injure the operator.

• Use the meter and the probes on ly within the ranges specified in this manual and in the
probes’ ones.

• Do not perform any measurement on materials under voltage. This could damage the
instrument.

• If during a measurement the read value or sign never changes, please verify if the
HOLD function is active.

1.3. AFTER USE

• When the measurements are completed switch OFF the instrument.

• Remove batteries when the apparatus remains unused for long periods.

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HT4000

2. GENERAL DESCRIPTION

The HT4000 meter can perform the following measurements:

• Air speed measurement with 30 mm diameter external probe

• Airflow measurement in m3/min (CMM) and ft3/min (CFM)

• Air temperature measurement in °C/°F with external probe

• Relative humidity measurement %RH with external probe

• Atmospheric pressure measurement with internal sensor

• Maximum, minimum and average (AVG) values

• Data HOLD

• Internal memory with 99 locations for measurement storing

• Back light

• Auto power OFF

Each function could be selected via the relative key. The selected quantity appears on a
high-contrast liquid crystal display with indication of measurement unit and of the active
functions. There are also the function keys, for their use please see § 4.3.

3. PREPARATION FOR USE

3.1. INITIAL

The instrument has been checked from every point of view before shipment. Every care
has been taken to make sure that the instrument reaches you in perfect conditions.

However, it’s advisable to make a rapid check in order to detect eventual damages, which
may have occurred in transit. Should this be the case, enter immediately the usual claims
with the carrier.

Make sure that all the accessories listed in § 6.3 are contained in the package. In case of
discrepancies contact the dealer.

In case of returning of the tester, please keep to the instructions given in § 7.

3.2. POWER SUPPLY

The instrument is battery supplied by 1 battery 9V type 9V NEDA 1604 IEC 6F22 JIS 006P
included in the package. Battery life: about 100 hours. When battery is low, the symbol

" appears on the display. Replace it immediately, following the instructions given in §

"

5.2.

3.3. CALIBRATION

The instrument complies with the technical features listed in this manual. Its performances
are guaranteed for one year.

3.4. STORAGE

In order to guarantee the accuracy of the measurements, after a period of storage in
extreme environmental condition, wait for the necessary time so that the instrument
returns to normal measuring conditions (see § 6.2.1).

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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. Low battery indication

2. Indication of active
Auto Power OFF

3. Main display
measuring unit

4. Secondary display
measuring unit

5. Secondary display

6. Main display

7. Symbols for internal
functions

Fig. 2: Display description

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