ENGLISH
User manual
Copyright HT ITALIA 2012 Release EN 2.00 - 06/06/2012
HT327
Table of Contents:
1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................... 2
1.1. Preliminary ........................................................................................................................ 2
1.2. During use ......................................................................................................................... 3
1.3. After use ............................................................................................................................ 3
1.4. Measuring (overvoltage) categories definitions ................................................................. 3
2. GENERAL DESCRIPTION ........................................................................................... 4
2.1. Mean value and TRMS: definition ..................................................................................... 4
2.2. True root mean square value and crest factor: definition .................................................. 4
3. PREPARATION FOR USE ........................................................................................... 5
3.1. Initial .................................................................................................................................. 5
3.2. Supply voltage ................................................................................................................... 5
3.3. Calibration ......................................................................................................................... 5
3.4. Storage .............................................................................................................................. 5
4. OPERATING INSTRUCTIONS ..................................................................................... 6
4.1. Instrument - description ..................................................................................................... 6
4.1.1. Front panel .................................................................................................................................. 6
4.2. Description of function keys .............................................................................................. 7
4.2.1. HOLD key ................................................................................................................................... 7
4.2.2. PK/REL key .................................................................................................................... ............ 7
4.2.3. MX/MN key ................................................................................................................................. 7
4.2.4. R/SEL key ................................................................................................................................... 7
4.2.5. Backlight key ( ) .................................................................................................................... 7
4.2.6. Disable Auto Power OFF ............................................................................................................ 7
4.3. Measurements................................................................................................................... 8
4.3.1. DC Voltage measurement .......................................................................................................... 8
4.3.2. AC Voltage measurement .......................................................................................................... 9
4.3.3. DC Current measurement ........................................................................................................ 10
4.3.4. AC Current measurement ......................................................................................................... 11
4.3.5. Resistance measurement and Continuity Test ......................................................................... 12
4.3.6. Diode test .................................................................................................................................. 13
4.3.7. Capacitance measurement ....................................................................................................... 14
4.3.8. Frequency measurement .......................................................................................................... 15
5. MAINTENANCE ......................................................................................................... 16
5.1. Battery and Fuse replacement ........................................................................................ 16
5.2. Cleaning .......................................................................................................................... 16
5.3. End of life ........................................................................................................................ 16
6. TECHNICAL SPECIFICATIONS ................................................................................ 17
6.1. Technical features ........................................................................................................... 17
6.1.1. Electrical specifications ............................................................................................................ 19
6.1.2. Reference guidelines ................................................................................................................ 19
6.1.3. General data ............................................................................................................................. 19
6.2. Environment .................................................................................................................... 19
6.2.1. Environmental conditions ......................................................................................................... 19
6.3. Accessories ..................................................................................................................... 19
6.3.1. Standard accessories ............................................................................................................... 19
6.3.2. Optional accessories ................................................................................................................ 19
7. SERVICE .................................................................................................................... 20
7.1. Warranty conditions ......................................................................................................... 20
7.2. After-sale service ............................................................................................................. 20
EN - 1
HT327
1. SAFETY PRECAUTIONS AND PROCEDURES
This meter is in compliance with safety IEC/EN61010-1 guideline 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 - make sure that humidity is within the limits
indicated in § 6.2.1.
Avoid doing that in rooms where explosive gas, combustible gas, steam or excessive
dust is present.
Keep you insulated from the object under test.
Do not touch exposed metal parts such as test lead ends, sockets, fixing objects,
circuits etc.
Avoid doing that if you notice anomalous conditions such as breakages, deformations,
fractures, leakages of battery liquid, blind display etc.
Be particularly careful when measuring voltages exceeding 20V to avoid risk of
electrical shocks.
The following symbols are used:
CAUTION - refer to the instruction manual - an improper use may damage the
instrument or its components.
Danger high voltage: risk of electric shocks.
Double insulated meter.
AC voltage or current.
DC voltage or current.
1.1. PRELIMINARY
This instrument has been designed for use in environments of pollution degree 2.
It can be used for VOLTAGE and CURRENT measurements on installations of
overvoltage CAT III 1000V and CAT IV 600V.
When using the instrument always respect the usual safety regulations aimed at
protecting you against the dangerous electric currents and protecting the instrument
against incorrect operations.
Only the leads supplied with the instrument guarantee compliance with the safety
standards in force. They must be in good conditions and, if necessary, replaced with
identical ones.
Do not test or connect to any circuit exceeding the specified overload protection.
Do not effect measurements under environmental conditions exceeding the limits
indicated in § 6.1.1 and § 6.2.1.
Make sure that batteries are properly installed.
Before connecting the test probes to the ins tallation make sure that the rotary selector
is positioned on the right function.
Make sure that LCD and rotary selector indicate the same function
EN - 2
HT327
1.2. DURING USE
CAUTION
An improper use may damage the instrument and/or its components or
injure the operator.
When changing the range, first disconnect the test leads from the circuit under test in
order to avoid any accident.
When the instrument is connected to measuring circuits never touch any unused
terminal.
When measuring resistors do not add any voltage. Although there is a protection
circuit, excessive voltage could cause malfunctioning.
If during measurement the displayed values remain constant check whether the 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.
1.4. MEASURING (OVERVOLTAGE) CATEGORIES DEFINITIONS
IEC/EN61010-1: Safety requirements for electrical equipment for measurement, control
and laboratory use, Part 1: General requirements, gives a definition of measuring
category, usually called overvoltage category. § 6.7.4: Measuring circuits:
(OMISSIS)
Circuits are divided into the following measurement categories:
Measurement category IV is for measurements performed at the source of the low-
voltage installation.
Examples are electricity meters and measurements on primary overcurrent protection
devices and ripple control units.
Measurement category III is for measurements performed in the building installation.
Examples are measurements on distribution boards, circuit breakers, wiring, including
cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and
equipment for industrial use and some other equipment, for example, stationary motors
with permanent connection to fixed installation.
Measurement category II is for measurements performed on circuits directly
connected to the low voltage installation..
Examples are measurements on household appliances, portable tools and similar
equipment.
Measurement category I is for measurements performed on circuits not directly
connected to MAINS.
Examples are measurements on circuits not derived from MAINS, and specially
protected (internal) MAINS-derived circuits. In the latter case, transient stresses are
variable; for that reason, the norm requires that the transient withstand capability of the
equipment is made known to the user.
EN - 3
HT327
2. GENERAL DESCRIPTION
This meter performs the below listed measurements:
DC and AC TRMS Voltage
DC and AC TRMS Current
Resistance and Continuity test
Frequency
Capacitance
Diode test
All selectable by means of a 10 position rotary selector (including OFF position). Functions
keys are also available (see § 4.2). An analogical bargraph is also available. The selected
quantity is displayed with indication of measuring unit and active functions.
The instrument disposes of an Auto Power Off function consisting in an automatic
switching off 30 minutes after last selector rotation or function selection.
2.1. MEAN VALUE AND TRMS: DEFINITION
Safety testers for AC quantities are divided in two big families:
MEAN VALUE instruments, measuring only the value of the wave at the
fundamental frequency (50 or 60 Hz).
TRUE ROOT MEAN SQUARE (or “TRMS”) instruments, measuring the true root
mean square value of the quantity under test.
In presence of a perfectly sinusoidal wave, both families provide identical results. While in
presence of distorted waves, readings are different. Mean value instruments provide only
the value of the fundamental wave while TRMS instruments provide the value of the entire
wave, including harmonics (within the passband of the instrument). Accordingly, if the
same quantity is measured with both kinds of instruments, the measured values are
identical only if the wave is purely sinusoidal. Should it be distorted, TRMS instruments
provide higher values than MEAN VALUE instruments.
2.2. TRUE ROOT MEAN SQUARE VALUE AND CREST FACTOR: DEFINITION
The effective current value is defined as follows: “In an interval of time equivalent to a
period, an alternate current with effective value having an intensity of 1A, by passing on a
resistor, disperses the same energy which would be dispersed in the same period of time
by a direct current having an intensity of 1A”. From this definition comes the numerical
Tt
0
1
expression: G=
T
The Crest Factor is defined as the ratio between the Peak Value of a signal and its
effective value: CF (G)=
for a purely sinusoidal wave it’s worth 2 =1.41. In presence of distortions the Crest Factor
assumes higher values as long as the wave distortion is higher.
2
dttg
)(
t
0
The effective value is indicated as RMS (root mean square).
G
p
. This value varies according to the waveform of the signal,
G
RMS
EN - 4
HT327
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 contact the local distributor from whom you bought the item).
Make sure that all standard accessories mentioned in § 6.3.1 are included.
Should you have to return back the instrument for any reason please follow the
instructions mentioned in § 7.
3.2. SUPPLY VOLTAGE
The instrument is supplied by 1x9V battery type NEDA1604 JIS006P IEC6F22. When
battery is low, a low battery indication “ ” is displayed. To replace/insert battery please
refer to § 5.1.
3.3. CALIBRATION
The instrument complies with the technical specifications contained in this manual and
such compliance is guaranteed for 1 year. Annual recalibration is recommended.
3.4. STORAGE
After a period of storage under extreme environmental conditions exceeding the limits
mentioned in § 6.2.1 let the instrument resume normal measuring conditions before using
it.
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HT327
4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT - DESCRIPTION
4.1.1. Front panel
LEGEND:
1. LCD
2. HOLD Key
3. PK/ REL Key
4. MX/ MN Key
5. R/SEL Key
6. Backlight Key
7. Function selector
8. Input terminal A
9. Input terminal
V Hz A
10. Input terminal COM
Fig. 1: Instrument description
EN - 6
HT327
4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. HOLD key
By pressing HOLD key the measured value is frozen on the display where the symbol
"HOLD" appears. Press again HOLD to disable this function and resume normal operation.
4.2.2. PK/REL key
This key have the double function of measuring max/min peak values (active for V and
A positions of rotary selector) and performing relative measurements (REL) for V, A,
Hz, / , , and A positions of rotary selector.
Press cyclically PK/REL to measure and save peak values. “PMAX” and “PMIN” symbols on
the display correspond to Maximum Peak and Minimum Peak values respectively which
are continuously updated by the meter. By keeping pressed PK/REL key for at least 3
seconds, “CAL” symbol appears on the display and the meter performs an auto calibration
permitting a higher accuracy on peak measurements. To exit this function keep pressed
PK/REL for at least one second or rotate the selector on another position. By pressing
PK/REL key, the relative measurement is activated: the meter saves the (offset) value on
the display and the “REL” symbol is shown. The following measurement will be referred to
this offset value. By pressing again PK/REL key the offset value is shown and the “REL”
symbol is blinking. To exit this function keep pressed PK/REL for at least one second or
rotate the selector on another position.
4.2.3. MX/MN key
By pressing MX/MN key, maximum and minimum values are measured. Both values are
stored and automatically updated as soon as an higher value (MAX) or lower value (MIN)
are measured by meter. The symbol corresponding to the desired function is displayed:
“MAX” for maximum value, “MIN” for minimum value. MX/MN key is disabled when HOLD
function is active. To exit this function keep MX/MN key pressed for at least 1 second or
rotate the selector to another position.
4.2.4. R/SEL key
By pressing R/SEL key the manual selection of measured range (exception
and
(by choosing between and
A positions) and the selection of a double function which are included on selector
measure and AC or DC Current) are possible. The
, , A
“MANU” symbol is shown at display by pressing R/SEL key and the cyclically pressure of
the key change the measuring range and fix the decimal point on the display. Press R/SEL
key at least 1second or rotate the selector to exit from this function and restore the “AUTO”
symbol at display. By moving the selector in /
position the resistance measure is
selected on meter and “” symbol is shown at display. Press R/SEL key to activate
continuity test (the symbol “ ” is shown). Press again R/SEL key to back to resistance
measurement.
4.2.5. Backlight key ( )
By pressing key it’s possible to activate the backlight function on the display. The
function automatically disabled itself after some seconds and is available on each position
of the rotary selector
4.2.6. Disable Auto Power OFF
The instrument switch off after 30 minutes of idleness. To disable this feature:
Switch OFF the meter
Switch ON the meter keeping pressed PK/REL, MX/MIN and R/SEL keys. The “ ”
symbol disappear at display
EN - 7
HT327
4.3. MEASUREMENTS
4.3.1. DC Voltage measurement
The maximum input for DC voltage is 1000V. Do not attempt to measure
higher voltages to avoid electrical shocks or damages to the instrument.
CAUTION
Fig. 2: Using the meter for DC Voltage measurement
1. Selecting the position V .
2. Pressing the R/SEL key to select the correct range or using the Autorange feature (see
§ 4.2). If the voltage value under test is unknown, select the highest range.
3. Insert the test leads into the jacks, the red plug into V Hz A jack and black plug
into COM jack
4. Connect the red and black test leads to the positive and negative poles of the circuit
under test respectively (see Fig. 2). The voltage value is displayed.
5. If the message "O.L" is displayed select a higher range.
6. The symbol "-" on the instrument display indicates that voltage has opposite direction
with regard to the connection.
7. For HOLD function, Minimum and Maximum value measurement and Relative measure
please refer to § 4.2.
EN - 8
HT327
4.3.2. AC Voltage measurement
The maximum input for AC voltage is 750Vrms. Do not attempt to measure
higher voltages to avoid electrical shocks or damages to the instrument.
CAUTION
Fig. 3: Using the instrument for AC Voltage measurement
1. Selecting the position
2. Pressing the R/SEL key to select the correct range or using the Autorange feature (see
§ 4.2). If the voltage value under test is unknown, select the highest range
3. Insert the test leads into the jacks, the red plug into V Hz A jack and black plug
into COM jack
4. Connect the test leads to the circuit under test (see Fig. 3). The voltage value is
displayed
5. If the message "O.L" is displayed select a higher range
6. For HOLD function, Minimum and Maximum value measurement and Peak
measurement please refer to § 4.2
EN - 9
HT327
4.3.3. DC Current measurement
The maximum input for DC current is 10A. Do not attempt to measure
higher currents to avoid electrical shocks or damages to the instrument.
CAUTION
Fig. 4: Using the instrument for DC Current measurement
1. Power off the circuit under test.
2. Selecting the position
. The message “ ” is shown at display.
3. Insert the test leads into the jacks, the red plug into A jack and black plug into COM
jack
4. Connect the red and the black plugs in series with the circuit whose current is to be
measured respecting the polarities (see Fig. 4)
5. Energize the circuit under test. The current value will be displayed.
6. The message "O.L." means that the detected current exceeds the limits.
7. If the measured value is lower than 4mA, to get a better resolution:
Switch off the circuit under test.
Turn the selector on A.
Remove the red test lead from A jack, and insert it into V Hz A jack and
power the circuit under test. Press R/SEL key if necessary to select an higher range.
8. The symbol "-" on the instrument display indicates that current has opposite direction
with regard to the connection of Fig. 4
9. For HOLD function, Minimum and Maximum value measurement and Relative measure
please refer to § 4.2
EN - 10
HT327
4.3.4. AC Current measurement
The maximum input for DC current is 10A. Do not attempt to measure
higher currents to avoid electrical shocks or damages to the instrument.
CAUTION
Fig. 5: Using the instrument for AC Current measurement
1. Power off the circuit under test
2. Selecting the position . By pressing R/SEL key to select AC measurement. The
“ ” symbol is shown at display
3. Insert the test leads into the jacks, the red plug into A jack and black plug into COM
jack
4. Connect the red and the black plugs in series with the circuit whose current is to be
measured (see Fig. 5)
5. Energize the circuit under test. The current value will be displayed.
6. The message "O.L." means that the detected current exceeds the limits.
7. If the measured value is lower than 4mA, to get a better resolution:
Switch off the circuit under test.
Turn the selector on A.
Remove the red test lead from A jack, and insert it into V Hz A jack and
power the circuit under test. Press R/SEL key if necessary to select an higher range.
8. For HOLD function, Minimum and Maximum value measurement, Peak measurement
(for A position) and for Relative measurement (for position) please refer to §
4.2
EN - 11
HT327
4.3.5. Resistance measurement and Continuity Test
CAUTION
Before taking resistance measurements on the circuit remove power from
the circuit being tested and discharge all capacitors.
Fig. 6: Using the instrument for Resistance measurement and Continuity test
1. Selecting the position /
2. Insert the test leads into the jack, the red plug into V Hz A jack and black plug
into COM jack
3. Connect the test leads to the circuit under test (see Fig. 6). The resistance value is
displayed
4. Pressing the R/SEL key to select the correct range or using the Autorange feature (see
§ 4.2). If the resistance value under test is unknown, select the highest range.
5. If the message "
O.L" is displayed a higher range must be selected.
6. For continuity test press the R/SEL key until the symbol “ ” is displayed and use the
test leads in the same way of resistance measurement. The buzzer is on for resistance
values <35.
7. For HOLD function, Minimum and Maximum value measurement and Relative measure
please refer to § 4.2.
EN - 12
HT327
4.3.6. Diode test
Before taking diode test on remove power from the circuit being tested and
discharge all capacitors.
CAUTION
Fig. 7: Using the instrument for Diode test
1. Selecting the position
2. Insert the test leads into the jacks, the red plug into V Hz A jack, and black plug
into COM jack
3. Connect the test leads to the diode under test observing the proper polarities (see Fig. 7 ).
The threshold voltage value of direct polarization is shown at display. The meter
displays the diode voltage to approximately 0.4 ~ 0.9V for good junction.
4. If the message “ O.L." is displayed the diode terminals are reversed or the diode P-N
junction is damaged.
5. For HOLD function, Minimum and Maximum value m easurement and Relative measure
please refer to § 4.2.
EN - 13
HT327
4.3.7. Capacitance measurement
Before taking capacitance measurements in circuit remove power from the
circuit being tested and discharge all capacitors. Due to internal delay time,
bargraph it’s no operative in capacitance measurement.
CAUTION
Fig. 8: Using the instrument for Capacitance measurement
1. Selecting the position
2. Insert the test leads into the jacks, the red plug into V Hz A jack and black
plug into COM jack
3. Connect the red and black test clamps to the capacitor terminals respecting if
necessary the proper polarities (see Fig. 8). The capacitance value is shown on
display
4. Pressing the R/SEL key to select the correct range or using the Autorange feature
(see § 4.2). If the capacitance value under test is unknown, select the highest range.
5. If the message "O.L" is displayed the maximum readable value is reached.
6. For HOLD function, Minimum and Maximum value measurement and Relative
measure please refer to § 4.2.
EN - 14
HT327
4.3.8. Frequency measurement
The maximum input for AC voltage is 750Vrms. Do not attempt to measure
higher voltages to avoid electrical shocks or damages to the instrument.
CAUTION
Fig. 9: Using the instrument for Frequency measurement
1. Selecting the position Hz.
2. Insert the test leads into the jacks, the red plug into V Hz A jack and black plug
into COM jack
3. Connect the test leads to the circuit under test (see Fig. 9). The frequency value will be
displayed.
4. Pressing the R/SEL key to select the correct range or using the Autorange feature (see
§ 4.2). If the frequency value under test is unknown, select the highest range
5. If the message "O.L" is displayed the maximum readable value is reached.
6. For HOLD function, Minimum and Maximum value measurement and Relative measure
please refer to § 4.2.
EN - 15
HT327
5. MAINTENANCE
CAUTION
Only skilled technicians can open the instrument and replace batteries.
Before removing batteries disconnect the test leads from the input
terminals to avoid electrical shocks
Do not expose it to high temperatures or humidity or direct sunlight
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 its inner components
5.1. BATT ERY AND FUSE REPLACE M ENT
When the symbol “ ” is shown at display the battery should be replaced.
Battery replacement
1. Disconnect the test leads from the input terminals
2. Remove the fixing screws from the back case and detach it
3. Remove the battery replacing it with new one (see § 6.1.3) respecting the polarity signs
and replace the back case and screws. Use the appropriate battery disposal methods
for your area
Fuse replacement
1. Turn OFF the meter and disconnect the test leads from the input terminals
2. Unscrew the four fixing screws of the back holster and remove it
3. Remove the defective fuse and install a new fuse of the same size and rating (see §
6.1.3). Make sure the new fuse is centered in the fuse holder. Re-screw the back
holster
5.2. CLEANING
To clean the instrument use a soft dry cloth. Never use a wet cloth, solvents or water.
5.3. END OF LIFE
Caution: this symbol indicates that equipment and its accessories shall be
subject to a separate collection and correct disposal.
EN - 16
HT327
6. TECHNICAL SPECIFICATIONS
6.1. TECHNICAL FEATURES
Accuracy is indicated as [%reading + (number of digits*resolution)] at 23°C±5°C, < 80%HR
DC Voltage
Range Resolution Accuracy Input impedance
400.0mV 0.1mV
(0.5%rdg + 3dgt)
4.000V 0.001V
40.00V 0.01V
(0.5%rdg + 2dgt)
10M // <100pF
400.0V 0.1V
1000V 1V
(1.0%rdg + 2dgt)
AC TRMS Voltage
Range Resolution
400.0mV 0.1mV Not declared
4.000V 0.001V
40.00V 0.01V
400.0V 0.1V
750V 1V
Accuracy
(50500Hz)
(1.3%rdg + 5dgt)
(50300Hz)
(1.5%rdg + 3dgt)
(50500Hz)
Input impedance
10M // <100pF
DC Current
Range Resolution Accuracy (*) Output voltage
400.0A 0.1A
4000A 1A
(1.0%rdg + 2dgt)
<5mV/A
10.00A 0.01A 2V max Fuse 10A/1000V
AC TRMS Current
Range Resolution
400.0A 0.1A
4000A 1A
10.00A 0.01A
Accuracy
(50500Hz)
Output voltage
(1.2%rdg + 5dgt) <5mV/A
(1.5rdg+5dgt)
(50 399Hz)
(2.0rdg+5dgt)
2Vmax Fuse 10A/1000V
(400 500Hz)
Resistance
Range Resolution Accuracy
400.0 0.1 (1.0%rdg + 5dgt)
4.000k 0.001k
40.00k 0.01k
(0.8%rdg + 2dgt)
400.0k 0.1k
4.000M 0.001M (1.0%rdg + 2dgt)
40.00M 0.01M (1.5%rdg + 5dgt)
Max Open
Circuit Voltage
about 1.3V
about 0.45V
Overload
protection
1000VDC
750VACrms
Overload
protection
1000VDC
750VACrms
Overload
protection
750Vrms
Overload
protection
750Vrms
Overload
protection
600Vrms
EN - 17
HT327
Diode Test
Feature Resolution
10mV
Accuracy
(0.4 0.8V)
(1.5%rdg + 5dgt)
Test
current
1.5mA <3V 600Vrms
Open
voltage
Overload
protection
Continuity Test
Feature Buzzer Open voltage
<35
about 1.3V
Overload
protection
600Vrms
Frequency
Range Resolution Accuracy Sensitivity Overload protection
4.000kHz 0.001kHz
40.00kHz 0.01kHz
Minimum pulse duration: 25ns
30% Duty Cycle 70%
(0.1%rdg + 2dgt)
1.5V ÷ 600VACrms
(0 ÷ 1.000kHz)
2.0V ÷ 5VACrms
(1.000kHz ÷ 40.000kHz)
600Vrms
Capacitance
Range Resolution Accuracy Overload protection
4.000nF 0.001nF
40.00nF 0.01nF
400.0nF 0.1nF
4.000F 0.001F
40.00F 0.01F
400.0F 0.1F
4.000mF 0.001mF
40.00mF 0.01mF
Not declared
(2.0%rdg + 8dgt)
(5.0%rdg+20dgt)
600Vrms
EN - 18
HT327
6.1.1. Electrical specifications
Conversion: TRMS
Measuring rate: 1.5 times per second
Temperature coefficient: 0.15×(accuracy)/°C (<18°C and >28°C)
NMRR Normal Mode Rejection Ratio: >50dB for DC parameters and 50/60Hz
CMRR Common Mode Rejection Ratio: >100dB from DC up to 60Hz on DCV
>60dB from DC up to 60Hz on ACV
6.1.2. Reference guidelines
Safety: IEC/EN61010-1
Insulation: double insulation
Pollution degree: 2
Measurement category: CAT IV 600V, CAT III 1000V (V//A)
Max height of use: 2000m (6561ft)
6.1.3. General data
Mechanical characteristics
Dimensions (L x W x H): 163 x 88 x 48mm (6.4 x 3.5 x 1.9in)
Weight (including battery): 400g (14 ounces)
Power supply
Battery type: 1x9V battery NEDA1604, JIS006P, IEC6F22
Low battery indication: symbol " " is displayed
Battery life: Approx. 300 hours
Auto power OFF: After 30 minutes of idleness
Fuse: F10A/1000V Bussmann type
Display
Specifications: 4 LCD with max. reading 3999 counts + symbol
decimal point sign and bargraph
Out of range indications: “OL” or “-OL”
6.2. ENVIRONMENT
6.2.1. Environmental conditions
Reference temperature: 23° ± 5°C (73 ± 41°F)
Working temperature: 0° ÷ 30°C (32 ÷ 104°F)
Relative humidity: <80%HR
Storage temperature: -20° ÷ 60°C (-4 ÷ 140°F)
Storage humidity: <80%HR
This product conforms to the prescriptions of the European directive on low voltage
2006/95/EEC (LVD) and to EMC directive 2004/108/EEC.
6.3. ACCESSORIES
6.3.1. Standard accessories
Test leads
User manual
Battery
B80: carrying case
6.3.2. Optional accessories
4413-2: couple of 4mm test leads
EN - 19
HT327
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 no 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 provided 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 unskilled 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. AFTER-SALE SERVICE
Shouldn’t the instrument work properly, before contacting your distributor make sure that
batteries are 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.
EN - 20
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