HT HT12 Handbuch Seite 2

1. PRECAUTIONS AND SAFETY MEASUREMENTS
HT12
This instrument complies with safety Standard IEC/EN61010-1
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
USER MANUAL
symbol
The following symbols are used in user manual and on the meter:
Copyright HT ITALIA 2013 Release EN 1.02 - 15/02/2013
5. FUNCTION KEYS DESCRIPTION
5.1 DH key
By pressing DH key the measured value is hold on the display where
the symbols "H" and " " appear. Pressing again DH to disable this
function and resume normal operation
5.2 RH key
By pushing RH key, the manual mode is activated, the "AUTO"
symbol disappears and the symbol " " is displayed. To quit this
function keep RH key pressed for at least 1 second or rotate the 6.2.1 DC Current measurement
selector into another position. The Autorange mode is automatically
1. Rotate the selector on
active whenever you switch on the meter
6. HOW TO PERFORM THE MEASUREMENTS
2. Perform zeroing operation turning the adjust knob which is
6.1 DC/AC Voltage measurement
CAUTION
Maximum input for AC/DC voltage measurements is
3. Put the conductor in the fork of clamp sensor at the centre of the
600V. Do not take any voltage measurement
exceeding this limit in order not to risk electrical shock
or damaging the meter
4. The current value is displayed. The symbol "-" on the instrument
position. The "DC" or "AC" and
1. Rotate the selector on or
"AUTO" symbols are shown at display. Press RH key for the
selection of manual range (see § 5.2)
6.2.2 AC Current measurement
2. Connect the red and black test leads to the positive and negative
poles of the circuit under test respectively (for DC voltage). The 1. Rotate the selector onto
voltage value is displayed
3. If the message "O.L" is displayed the maximum voltage value
was exceeded 2. Put the conductor in the fork of clamp sensor at the centre of the
4. On DC voltage measurement the symbol "-" on the instrument
display indicates that voltage has opposite direction compared to
the previous connections
5. For Data HOLD feature see § 5.1 3. The current value is displayed
4. For Data HOLD feature see § 5.1
6.2 Current measurement with fork sensor clamp
6.3 Resistance and Continuity test measurements
CAUTION
Do not perform measurements on circuits with a
voltage exceeding 600V AC/DC between phases or
exceeding 300V AC/DC between phase and ground
to avoid possible shock hazard
1. Rotate the selector onto
Do not perform measurements with test leads
connected to the circuit under test
Do not apply strong vibrations to the clamp sensor
2. Connect the test leads to the circuit under test. The resistance
and keep the fingers behind the protective bar
during measurements
3. The continuity test is always active and the buzzer sounds when
1.1 Preliminary instructions
CAUTION
Avoid measuring in humid or wet places
Avoid measuring 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 fluid, blind display
etc.
Be careful when measuring voltages exceeding
20V to avoid risks of electrical shock
CAUTION - refer to the instruction manual - an
improper use may damage the instrument or its
components
Double insulated meter
The instrument can clamp not insulated live cables
corresponding to the measurement category
indicated on them
AC voltage or current 1.2 Measuring overvoltage category definitions
According to the IEC/EN61010-1 guidelines the circuits are divided
DC voltage or current
into the following measurement categories:
CAUTION: this symbol indicates that equipment, its
accessories and battery shall be subject to a
separate collection and correct disposal
6.4 Frequency measurement
6.4.1 Voltage frequency measurement
1. Rotate the selector on Hz position. Press RH key for the
2. Connect the test leads to the circuit under test. The frequency
position. The "DC" and "AUTO" symbols
are displayed. Press RH key for the selection of manual range
6.4.2 Current frequency measurement
(see § 5.2)
1. Rotate the selector on Hz position. Press RH key for the
present on the central part of the clamp sensor. The "0.0" value
2. Put the conductor in the fork of clamp sensor at the centre of
should be displayed to perform correct measurements
arrows keys which are present in the frontal side (see picture)
and respect the current direction as indicated by the arrow key
which is present on the meter sideways
display indicates that the current has opposite direction
compared to the previous connection
position. The "AC" and "AUTO"
symbols are displayed. Press RH key for the selection of manual
range (see § 5.2)
arrows keys which are present in the frontal side (see picture)
and respect the current direction as indicated by the arrow key
7. BATTERY REPLACEMENT
which is present on the meter sideways
When the "
must be replaced as follows:
1. Switch OFF the meter
CAUTION 2. Remove the protection holster from the instrument
3. Remove the fixing screw and the battery compartment cover
Before taking resistance measurements on circuit
4. Remove batteries and replace with new ones of the same type
remove power from the circuit under test and
5. Replace battery compartment cover and holster
discharge all capacitors
position. The "M " and "O.L"
/
symbols are displayed. Press RH key for the selection of manual
range (see § 5.2)
value is displayed
resistance values are lower than 30 . In Manual mode the " "
symbol is displayed only in the 340 range
1.800.561.8187
www.
2. GENERAL DESCRIPTION
CAUTION
HT12 performs the following measurements:
This instrument has been designed for use in
DC and AC voltage
environments with pollution degree 2
DC and AC current by using integrated sensor fork clamp
It can be used for VOLTAGE and CURRENT
Resistance and continuity test
measurements on installations with overvoltage
Voltage and current frequency
category CAT III 300V and CAT II 600V
All selectable by means of a 7-position function selector. Function
Only the leads supplied with the instrument
guarantee compliance with the safety keys DH and RH in addition to an analogical bargraph are also
available (see § 5.1 and § 5.2). The selected quantity is displayed
standards in force. They must be under good
conditions and, if necessary, replaced with with indication of measuring unit and active functions. The
instrument is provided with an Auto Power Off function consisting
identical ones
in an automatic switching off 10 minutes after last pressure on
Do not test or connect to any circuit exceeding
keys or rotation of selector. To resume normal operation, switch
the specified overload protection
on the instrument again
Do not effect measurements under
environmental conditions exceeding the limits
3. PREPARATION FOR USE
indicated in § 8
3.1 Initial checks
Make sure that batteries are properly installed
This instrument was checked both mechanically and electrically
Before connecting the test probes to the
prior to shipment. All possible cares and precautions were taken
installation, make sure that the function
to let you receive the instrument under perfect conditions.
selector is positioned on the required
Notwithstanding we suggest you to check it rapidly (any damage
measurement
may have occurred during transport – if so please contact the
Make sure that LCD and function selector
local distributor from whom you bought the item). Make sure that
indicate the same function
all standard accessories mentioned in § 8 are included. Should
When changing the range, first disconnect the
you have to return back the instrument for any reason please
test leads from the circuit under test in order to
follow the instructions mentioned in § 9
avoid any accident
3.2 Supply voltage
When the instrument is connected to
The instrument is powered by 2x1.5V batteries AAA LR03
measuring circuits never touch any unused
included in the packaging. When batteries are low the symbol
terminal
"
If during measurement the displayed values
instructions indicated in § 7
remain constant check whether the HOLD
3.3 Calibration
function is active
The instrument complies with the technical specifications
contained in this manual and such compliance is guaranteed for
12 months
3.4 Storage
CAT IV is for measurements performed at the source of the low-
After a period of storage under extreme environmental conditions
voltage installation
exceeding the limits mentioned in § 8 let the instrument resume
CAT III is for measurements performed in the building installation
normal operating conditions before using it
CAT II is for measurements performed on circuits directly
connected to the low voltage installation
CAT I is for measurements performed on circuits not directly
connected to MAINS
8. TECHNICAL SPECIFICATIONS
CAUTION The accuracy is referred to 23°C± 5°C, <75%RH
AC Current
Do not perform measurements on circuits with a
voltage exceeding 600V AC/DC between phases or
exceeding 300V AC/DC between phase and ground
to avoid possible shock hazard
Overload protection: 72A AC/DC for 10s
DC Current
selection of manual range (see § 5.2)
value (in kHz or MHz) is displayed
Overload protection: 72A AC/DC for 10s
AC Voltage
selection of manual range (see § 5.2)
the arrows keys. The value (in kHz or MHz) is displayed
DO NOT CONNECT SIMULTANEOUSLY THE TEST LEADS
AND THE CLAMP SENSOR TO THE INSTALLATION
Input impedance: 10M
DC Voltage
0.000
Input impedance: 10M
Resistance and Continuity test
" low battery indication is displayed the batteries
0.000
0.000
0.00
Frequency
Current sensitivity: 15A ; Voltage sensitivity: 30V
Safety: IEC/EN61010-1, IEC/EN61010-2-031, IEC/EN61010-2-032
Measurement category: CAT III 300V , CAT II 600V, Pollution degree: 2
Insulation: double insulation
Compliance with 2004/108/CE (EMC) and 2006/95/CE (LVD) Directives
Display: LCD, ¾ dgt, 3400 points with bargraph
information@itm.com
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4. INSTRUMENT AND DISPLAY DESCRIPTION
" is displayed. To replace/insert batteries follow the
Sampling rate: approx 400ms (approx 20ms bargraph)
Over range indication: "O.L" or "-O.L" symbols at display
Power supply: 2x1.5V alkaline batteries type AAA LR03 UM-4
Auto Power OFF: after 10 minutes of idleness (not disable)
Reference temperature/humidity: 23°C± 5°C (73°F ± 41°F) ; <75%RH
Meas. Range Resolution Accuracy
Working temperature/humidity: 0
0.0 60.0A 0.1A (2.0%rd+5dgt) (50/60Hz)
Storage temperature/humidity: -20
Max height of use: 2000m (6562ft)
Max diameter conductor : 6mm (0.2in)
Dimensions (LxWxH): 128x87x24mm (5x3x1in)
Meas. Range Resolution Accuracy
Weight (with batteries): 210g (7ounces)
Included accessories: batteries, user manual
0.0 60.0A 0.1A (2.0%rdg+5dgt)
9. SERVICE
9.1 Warranty conditions
This instrument is guaranteed for one year against material or
Meas. Range Resolution Accuracy
production defects, in accordance with our general sales conditions.
0.000 3.400V 0.001V
0.00 34.00V 0.01V
(1.5%rdg+5dgt) (50-400Hz)
During the warranty period the manufacturer reserves the right to
0.0 340.0V 0.1V
decide either to repair or replace the product. Should you need for
0 600V 1V
any reason to return back the instrument for repair or replacement
; Overload protection: 720V AC/DC for 10s
take prior agreements with the local distributor from whom you
bought it.
Meas. Range Resolution Accuracy
Do not forget to enclose a report describing the reasons for returning
340.0mV 0.001mV
(detected fault). Use only original packaging. Any damage occurred
0.000 3.400V 0.001V
in transit due to not original packaging will be charged anyhow to the
0.00 34.00V 0.01V (1.5%rdg+4dgt)
customer
0.0 340.0V 0.1V
0 600V 1V 9.2 Service
Should the instrument not work properly, make sure that batteries are
; Overload protection: 720V AC/DC for 10s
correctly installed and working before contacting your distributor, also
check the test leads and replace them if necessary.
Meas. Range Resolution Accuracy
0.0 340.0 0.1
Should you need for any reason to return back the instrument for
(1.0%rdg+3dgt)
3.400k 0.001k
repair or replacement take prior agreements with the local distributor
Buzzer active for R<30 10
0.00 34.00k 0.01k
from whom you bought it.
Only on 340 range
0.0 340.0k 0.1k
Do not forget to enclose a report describing the reasons for returning
3.400M 0.001M (5.0%rdg+5dgt)
(detected fault). Use only original packaging. Any damage occurred
34.00M 0.01M (15.0%rdg+5dgt)
in transit due to not original packaging will be charged anyhow to the
customer. The manufacturer will not be responsible for any damage
Meas. Type Meas. Range Accuracy
to persons or things.
Current 0 10kHz
(0.1%rdg+1dgt)
Voltage 0 300kHz
40°C (32°F 104°F) ; <85%RH
60°C (-4°F 140°F) ; <85%RH
HT ITALIA SRL
Via della Boaria, 40
48018 – Faenza (RA) – ITALY
Tel: +39-0546-621002
Fax: +39-0546-621144
Web: www.ht-instruments.com
Email: ht@htitalia.it