Honeytek HK68B User manual

1
User’s Guide
Honeytek True RMS Auto Range Digital Multimeter
- HK68 Series
Shanghai HONEYTEK Electronic Instrument Co., Ltd (Headquarter)
1-2Fl., Building No.11A, Ruiqing Rd 528, Zhangjiang High-Tech Industrial Park,
Pudong District, Shanghai, China. (Zip Code: 201319)
Tel: [phone] / Fax: [phone]
Shenzhen HONEYTEK Electronic Instrument Co., Ltd (Subsidiary)
3rd Fl., #4 Building, Yingrenshi Xiangxiang Industrial Park, Shiyan Town,
Bao’an District, Shenzhen, China (Zip Code: 518055)
Tel: [phone] / Fax: [phone]
Email: [e-mail]
Website: www.honeytek.com

2
TABLE OF CONTENTS
1. INTRODUCTION
2. SAFETY
3. DESCRIPTION
3.1 Controls and Jacks
3.2 Front Panel Description
3.3 Symbols of LCD display
4. TECHNICAL SPECIFICATIONS
4.1 General Specifications
4.2 Measurement Specifications
5. OPERATING INSTRUCTIONS
5.1 AC and DC Voltage Measurement
5.2 Current Measurement
5.3 Diode Test and Continuity Check
5.4 Resistance Measurement
5.5 Capacitance Measurement
5.6 Temperature Measurement (for HK68B and HK68C)
5.7 Frequency (Duty Cycle) Measurement
5.8 Transistor hFE Test (for HK68A)
5.9 NCV (Non-Contact Voltage) Detection
5.10 LINE (Live Wire Recognition) Test
5.11 MAX/MIN
5.12 RELATIVE Mode
5.13 USB Interface (for HK68C)
5.14 Display Backlight
5.15 Hold Function
5.16 Auto Power Off
5.17 Low Battery Indication
6MAINTENANCE
6.1 Battery Installation
6.2 Replacing the Fuses

3
1. INTRODUCTION
Congratulations on your purchase of the Honeytek HK68 series True RMS Auto range
multimeter. This range meters have been designed according to IEC-61010-2-032
concerning electronic measuring instruments with 1000V CAT III & CAT IV and pollution 2.
This range meters measures AC/DC Voltage, AC/DC Current, Resistance, Diode Test,
Continuity, Capacitance, Frequency, Transistor, Temperature, and Non-Contact Voltage
Detection. It features a rugged design for heavy duty use. Proper use and care of this meter
will provide many years of reliable service.
To fully utilize this meter, please keep this manual for reference carefully.
Function
Model No.
HK68A
HK68B
HK68C
Max. Display
4000 counts
4000 counts
6000 counts
Basic Accuracy
0.5%
0.5%
0.5%
DC Voltage Range
40mV-1000V
40mV-1000V
60mV-1000V
AC Voltage Range
40mV-750V
40mV-750V
60mV-750V
DC Current Range
400µA-10A
400µA-10A
600µA-10A
AC Current Range
400µA-10A
400µA-10A
600µA-10A
Resistance（）
400-40M
400-40M
600-60M
Capacitance (CAP)
10nF-100mF
10nF-100mF
10nF-100mF
Frequency (Hz)
10Hz-10MHz
10Hz-10MHz
10Hz-10MHz
Temperature Test (℃/℉)
-
0℃-1000℃
0℃-1000℃
32℉-1832℉
32℉-1832℉
Transistor hFE Test
Yes
-
-
Diode Test
Yes
Yes
Yes
Continuity Check
Yes
Yes
Yes
Duty Cycle
Yes
Yes
Yes
NCV (Non-Contact Voltage) Detection
Yes
Yes
Yes
LINE (Live Wire Recognition) Test
Yes
Yes
Yes
Max. Input Protection
Yes
Yes
Yes
Relativity (Zero)
Yes
Yes
Yes
LCD Backlight
Yes
Yes
Yes
USB Interface
-
-
Yes

4
2. SAFETY
This symbol indicates that the operator must refer to an explanation in the Operating
Instruction to avoid personal injury or damage to the meter.
CAUTIONS:
● Improper use of this meter can cause damage, shock, injury or death. Read and
understand this user manual before operating the meter.
● Always remove the test leads before replacing the battery or fuses.
●Inspect the condition of the test leads and the meter itself for any damage before
operating the meter.
● Do not measure voltage if the voltage on the terminals exceeds 1000V above earth
ground.
● Use great care when making measurements if the voltages are greater 30VAC RMS or 60V
DC, these voltages are considered a shock hazard.
● Always discharge capacitors and remove power from the device under test before
performing Diode, Resistance or Continuity tests.
● To avoid damages to the meter, do not exceed the maximum limits of the input values
shown in the specification.
● In case the device is going to be unused for an extended period of time, remove the
batteries to prevent them from draining.
3. DESCRIPTION
3.1 Controls and Jacks
1. Non-contact voltage detection position
2. LED indicator
3. LCD display
4. Function buttons
5. Rotary switch
6. Input jacks
Note: Tilt stand and battery compartment
are on rear of unit
US B
2、LED indicator
3、LCD display
4、Function buttons
5、Rotary switch
6、Input jacks
1、Non-contact voltage
detection position

5
3.2 Front Panel Description
1
NCV Detection
(Non-Contact Voltage)
Move the rotary switch to NCV position, hold the meter
once detect the voltage, meter will be alarmed and LED
flash
2
LED Indicator
Once NCV alarm, LED indicator will flash, if detect
voltage increasing, the LED twinkles faster. NVC alarm
together with beeper sound.
3
LCD Display
The measured readings and symbols will be displayed in
this area.
4
Function Buttons
FUNC: the function select key that acts with trigger,
Use this key as switch to shift the measures of DC/AC,
Resistance/Continuity/Diode/ ℃/℉
REL: Press the "REL"key, you can measure the relative
value and ‘REL’ sign will appear on the LCD display in
the relative mode; Hold the button for 2 sec. to
activate USB communication with PC
MIN/MAX: Press this button LCD shows Max. value, Min.
value and difference value between max.& min.,
holding the button to exit this mode
RANGE: It is the auto/manual measurement push key,
the default is auto measurement once power is on, to
press one more time, will switch to manual
measurement. If press and hold this key over 2sec, the
meter will switch to auto measurement mode. You can
also manually choose the ranges once measures Voltage
& resistance.
Hz/%: the function shift button on frequency and duty
cycle measurement, valid under AC measuring modes.
HOLD: Press this button to lock the readings in the LCD,
press again to exit the hold mode.
Press " " to switch the back light mode, around 15sec.
exit from back light mode.
5
Rotary Switch
By moving the rotary switch to each individual range of
measurement or to the range needs to be measured
6
Input Jacks
V/Ω: the positive input terminal for voltage, resistance,
diode, temperature, frequency, capacitance, etc
COM: the negative input terminal for voltage, diode,
temperature, etc
mA: the input terminal for lower 600mA current
A: 10A input terminal

6
3.3 Symbols of LCD display
Symbol
Description
Symbol
Description
Data Hold
Low Voltage Indication
Diode Test
Low Pass Filter Function
Max. Value Hold
Low Pass Filter Function
NCV
Non-Contact Voltage
Detection
INR
Inrush Current
mV
V
Unit of Voltage
uA
mA
A
Unit of Current
Hz
KHz
MHz
Unit of Frequency
pF
nF
uF
mF
Unit of Capacitance

K
M
Unit of Resistance
uH
mH
H
Unit of Inductance
hFE
Transistor
℃
Centigrade
Temperature
TRMS
True RMS Measurement
℉
Fahrenheit
Temperature
%
Duty Cycle Measurement
REL
Relative Value
Measuremt

7
4. TECHNICAL SPECIFICATIONS
4.1 General Specifications
● Auto range 4000 count digital multimeter (HK68A/HK68B) / Auto range 6000 count digital
multimeter (HK68C)
● Overload protection, full range protection
● Data hold function
● Relative mode measurement
● Low voltage indication
● Backlight
● Auto power off
●Max. input voltage: AC750VRMS, DC1000V
●Sampling rate: Approx. 2/sec
● Operating Temperature: 0℃~40℃(32℉~104℉)
Operating Humidity: < 80%RH
● Storage Temperature: -10℃~60℃(14℉~122℉)
Storage Humidity: < 70%RH
● Power Supply: 9V Battery (6F22) x 1pc
● Dimension: 200 x 92 x 60mm (L x W x H)
● Weight: Approx. 230g (include battery)
●Accessory: user manual, test leads, gift-box, temperature probe (for HK68B & HK68C),
transistor test kit (for HK68A)
4.2 Measurement Specifications
Accuracy: ±(%readings + digit), warranty period: 12 months)
Environment temperature: 18℃~28℃; humidity: ≤80%
4.2.1 DC Voltage
Input impedance: 10MΩ; Max. input voltage: 1000V DC
4.2.2. AC Voltage
Range
Resolution
Accuracy
40mV/60mV
0.01mV
±(0.5% reading + 5 digits)
400mV/600mV
0.1mV
4V/6V
0.001V
±(0.8% reading + 3 digits)
40V/60V
0.01V
400V/600V
0.1V
1000V
1V
±(1.0% reading + 5 digits)
Range
Resolution
Accuracy
40mV/60mV
0.01mV
±(1.0% reading + 20 digits)
400mV/600mV
0.1mV
±(1.0% reading + 5 digits)
4V/6V
0.001V
±(0.8% reading + 5 digits)
40V/60V
0.01V
400V/600V
0.1V
750V
1V
±(1.0% reading + 5 digits)

8
Input impedance: 10MΩ
Max. input voltage: 750V ACRMS
Frequency range: 40~1000Hz
4.2.3 DC Current
Range
Resolution
Accuracy
400µA/600µA
0.1µA
±(1.0% reading + 5 digits)
4mA/6mA
0.001mA
±(0.8% reading + 5 digits)
40mA/60mA
0.01mA
400mA/600mA
0.1mA
4A/6A
0.001A
±(1.0% reading + 10 digits)
10A
0.01A
Overload protection: fuse FF500mA/1000V for mA range
fuse FF10A/500V for 10A range
4.2.4. AC Current
Range
Resolution
Accuracy
400µA/600µA
0.1µA
±(1.2% reading + 5 digits)
4mA/6mA
0.001mA
40mA/60mA
0.01mA
±(1.5% reading + 5 digits)
400mA/600mA
0.1mA
4A/6A
0.001A
±(1.8% reading + 15 digits)
10A
0.01mA
Overload protection: fuse FF500mA/1000V for mA range,
fuse FF10A/500V for 10A range
Frequency range: 40~1000Hz
4.2.5 Resistance
Range
Resolution
Accuracy
400Ω/600Ω
0.1Ω
±(0.8% reading + 5 digits)
4kΩ/6kΩ
0.001kΩ
40kΩ/60kΩ
0.01kΩ
400kΩ/600kΩ
0.1kΩ
4MΩ/6MΩ
0.001MkΩ
40MΩ/60MΩ
0.01MkΩ
±(1.2% reading + 15 digits)
Overload protection: 250V DC or 250V AC RMS
4.2.6 Diode and Continuity
Range
Function
Display approximate forward voltage of diode
Built-in buzzer will be sounded if resistance is less than
30Ω

9
4.2.7 Temperature (for HK68B and HK68C)
Range
Resolution
Accuracy
-20℃~ 400℃
1℃
±(2.0% reading + 3 digits)
400℃~ 1000℃
0℉~ 752℉
1℉
±(2.0% reading + 3 digits)
752℉~ 1832℉
Overload protection: 250V DC or 250V AC RMS
4.2.8 Frequency
Range
Resolution
Accuracy
10Hz
0.01Hz
±(0.5% reading + 2 digits)
100Hz
0.1Hz
1kHz
0.001kHz
10kHz
0.01kHz
100kHz
0.1kHz
1MHz
0.001MHz
10MHz
0.01MHz
Overload protection: 250V DC or 250V AC RMS
4.2.9 Capacitance
Range
Resolution
Accuracy
10nF
0.01nF
±(4.0% reading + 25 digits)
100nF
0.1nF
±(4.0% reading + 15 digits)
1µF
0.001µF
10µF
0.01µF
100µF
0.1µF
1mF
1µF
±(5.0% reading + 25 digits)
10mF
10µF
100mF
100µF
Overload protection: 250V DC or 250V AC RMS
Note: It is normal once the small value of capacitance dose not return zero, deduct the
readings during measurement for getting the accurate value.
4.2.10. Transistor hFE (for HK68A)
Range
Function
hFE
Display approx. hFE value 1~1000 of transistor under test,
base current approx. 1mA.

10
5. OPERATING INSTRUCTIONS
5.1 AC and DC Voltage Measurement
WARNING:
Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should
be measured with great care.
● To avoid electrical shock and/or damage to the instrument, do not attempt to take any
voltage measurement that might exceed 1000VDC or 750VAC RMS.
●To avoid electrical shock and/or damage to the instrument, do not apply more than
1000VDC or 750VAC RMS between the common terminal and the earth ground.
1) Set the rotary switch to the voltage position (~ mV / ~ V).
2) Insert the black test lead banana plug into the negative COM jack; insert the red test
lead banana plug into the positive V/Ωjack.
3) Touch the black test probe tip to the negative side of the circuit; touch the red test
probe tip to the positive side of circuit.
4) Read the voltage in the LCD display. The polarity of red test lead connection will be
indicated when making DC Voltage measurement.
NOTE:
Unstable display may occur, especially at the low voltage range measurement, even no test
leads insert at input terminals, if an erroneous readings suspected, short the Vjack and
COM jack and make sure the zero displayed at LCD.
5.2 Current Measurement
WARNING:
●To avoid damage to the meter, check the fuse of the meter before current measurement.
●User the proper terminals, function and range for any current measurement
●Never attempt an open circuit potential to earth is greater than 250V, do not place the
test leads in parallel with a circuit or component when the test leads are plugged into the
current terminals.
1) Remove the power from the circuit under test and discharge the capacitors of the
circuit.
2) Set the rotary switch to current measuring range.
3) Insert black test lead banana plug into the negative COM jack, for current measurement
less than 400mA (for model HK68C less than 600mA) insert the red test lead banana plug
into the mA jack, for current measurement between 400mA to 10A (for model HK68C
between 600mA to 10A), insert the red test lead banana plug into 10A jack.
4) Break the circuit under test, connect the black test lead to the more negative side of
the break, and connect the red test lead to the more positive side of break.

11
5) Turn on the power of circuit under test and read the value in LCD display. If only display
OL, which means the input over range and requested to select the higher range.
6) Turn off the power of circuit under test and discharge all capacitors, remove the test
leads and recover the measured circuit.
5.3 Diode Test and Continuity Check
WARNING:
To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking diode test.
1) Set the rotary switch to position, press “FUNC”button to indicate on the
display / press “FUNC”button to indicate on the display.
2) Insert the black test lead banana plug into the negative COM jack, insert the red test
lead banana plug into the positive V jack.
3) Place the red test lead on the anode of diode and black test lead on the cathode of
diode, the meter will show the approx. forward voltage of diode, reverse voltage will
indicate OL.
4) Touch the test probe tips to the circuit or wire you wish to check, the max. value of
resistance under check will be showed in display, if the resistance is less than 30Ω, the
audible signal will sound.
NOTE:
In a circuit, a good diode should produce a forward bias reading of voltage, however, the
reverse-bias reading can be variable based on resistance of other pathways between the
probe tips.
To avoid electric shock, never measure continuity on circuits of wires that have voltage on
them.
5.4Resistance Measurement
WARNING:
To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any resistance measurements. Remove the batteries and unplug
the line cords.
1) Set the rotary switch to position, press “FUNC”button to indicate on the display.
2) Insert the black test lead banana plug into the negative COM jack, insert the red test
lead banana plug into the positive V jack.
3) Touch the test probe tips across the circuit or part under test. It is best to disconnect
one side of the part under test so the rest of the circuit will not interfere with the
resistance reading.
4) Read the resistance in the LCD display
NOTE:
●The measured value of a resistor in a circuit usually is different from the rated value of
resistor, it because the test current of the meter flows through all possible paths between

12
the probe tips.
●In order to ensure the best accuracy in measurement of low resistance, short the test
leads before the measurement and subtract this resistance value of the test leads.
●For high resistance measurement, the meter may take a few seconds to stabilize the
readings.
●In the open circuit, the meter display OL to indicate the over range
5.5 Capacitance Measurement
WARNING:
To avoid electric shock, disconnect power to the unit under test and discharge all
capacitors before taking any capacitance measurements.
1) Set the rotary switch to position, press “FUNC”button to indicate nF on the display.
2) Insert the black test lead banana plug into the negative COM jack, insert the red test
lead banana plug into the positive V jack.
3) Touch the test leads to the capacitor to be tested and read the capacitance value in the
display.
NOTE:
●The test may take more time for large capacitors to charge, wait until the readings settle
before ending the test.
●To improve the accuracy of measurement less than 10nF, subtract the residual
capacitance of the meter and test leads.
5.6Temperature Measurement (for HK68B and HK68C)
WARNING:
To avoid electrical shock, do not perform temperature measurement when the input the
voltage exceed 36V DC or 36V AC rms.
1) Set the rotary switch to ℃℉ position, LCD displays values of environmental of
temperature.
2) Insert the temperature probe into the input jack, insert red plug of thermo probe into
V℃℉ jack, black plug of thermo probe into COM jack, making sure to observe the
correct polarity.
3) Press FUNC button to indicate ℃or ℉
4) Touch the temperature probe head to the part whose temperature you wish to measure,
keep the probe touching the part under test until the reading stabilizes.
5) Read the temperature in the LCD display.
5.7Frequency (Duty Cycle) Measurement
WARNING:
To avoid electric shock, do not apply more than 250V DC or 250V AC rms before taking
frequency measurement.
1) Set the rotary switch to Hz/% position.

13
2) Insert the black test lead banana plug into the negative COM jack and the red test lead
banana plug into the positive Hz jack
3) Touch the test lead tips to the circuit under test.
4) Read the frequency value in the LCD display.
5) Press the FUNC button to indicate "%"
6) Read the % duty cycle in the LCD display.
5.8 Transistor hFE Test (for HK68A)
WARNING:
To avoid electric shock, do not apply more than 36VDC or 36V AC rms between hFE terminal
and the COM terminal.
1) Set the rotary switch to hFE range
2) Connect the COM and “+”plug of the special multi-function socket to the COM and V/
input jack.
3) Determine whether the transistor under test is NPN or PNP type and located the emitter,
base and collector leads.
4) Insert leads to the transistor into proper holes of the special multi-function socket.
5) The meter will show the approx. hFE value in LCD display.
5.9 NCV (Non-Contact Voltage) Detection
WARNING:
Due to external interference source, this function may cause wrong voltage detection, the
detection result is for reference only.
Set the rotary switch to NCV position and LCD display EF, contact the top part of meter
with the circuit under test, the indicating LED will flash and audible signal will sound, the
signal strength showed in LCD display.
NOTE:
●The detection result is for reference, do not determine the voltage by NCV detection
ONLY.
●Detection may interfere by socket design, insulation thickness and other variable
conditions.
●The external interference sources, such as flashlight, motor, etc, may cause the wrong
detection.
5.10 LINE (Live Wire Recognition) Test
Set the rotary switch to LINE position, connect the black test lead to COM jack and red test
lead to VΩjack, hold the insulation part of black test lead and not put into circuit under
measurement; contact the red test lead to live wire, the buzzer of meter will be activated
and red LED will be flickered, when the red test lead connect the earth line, the buzzer
does not sound and LED will not flicker.

14
NOTE:
When the circuit is in serious leakage (approx. over 15V), the red test lead even contact
earth line, the buzzer of meter will be sounded and LED will be flickered.
5.11 MAX/MIN
1) Press the MAX/MIN button to activate the MAX/MIN recording mode, the display icon
"MAX" will appear, the meter will display and hold the maximum reading and will update
only when a new "max" occurs. This display icon "MIN" will appear, the meter will display
and hold the minimum reading and will update only when a new "min" occurs.
2) To exit MAX/MIN mode press and hold MAX/MIN button for 2 seconds.
5.12 RELATIVE Mode
The relative measurement feature allows you to make measurements relative to a stored
reference value. A reference voltage, current, etc. can be stored and measurements made
in comparison to that value. The displayed value is the difference between the reference
value and the measured value.
1) Press REL button to store the reading in the LCD display and the REL indicator will
appear on the LCD display.
2) The LCD display will indicate the difference between the stored value and measured
value
3) Press the REL button to exit the relative mode.
5.13 USB Interface (for HK68C)
1) Install and launch the PC software.
2) Press and hold the REL/USB button for 2 seconds to enter USB communication mode.
3) When the communication is established, the data will be displayed on the PC screen,
plotted and inserted into a list
4) Hold the REL button 2 seconds to exit USB communication mode.
5.14 Display Backlight
Press the button for 1 or 2 seconds to turn on or off the display backlight function, the
backlight will automatically turn off after 10 seconds.
5.15 Hold Function
The hold function freezes the reading in the display, press the HOLD button momentarily to
activate or to exit the hold function.
5.16 Auto Power Off
The auto off feature will turn the meter off after 15 minutes, to disable the auto power off
feature, hold down the FUNC button and turn the meter on.
5.17 Low battery Indication

15
The icon will appear in the LCD display when the battery voltage becomes low,
replace the battery when this icon appears.
6MAINTENANCE
WARNING:
●To avoid electric shock, disconnect the test leads from any source of voltage before
removing the back cover or the battery or fuse covers.
●To avoid electric shock, do not operate the meter until the battery and fuse covers are in
place and fastened securely.
6.1Battery Installation
To avoid the false readings, replace the battery as soon as the battery indicator
appears.
1) Turn power off and disconnect the test leads from the meter.
2) Open the rear battery cover by using screwdriver.
3) Insert the battery into battery holder, observing the correct polarity.
4) Put the battery cover back in place, secure with the screws.
6.2Replacing the Fuses
1) Turn power off and disconnect the test leads from the meter.
2) Remove the battery cover and the battery.
3) Remove the screws securing the rear cover.
4) Gently remove the old fuse and install the new fuse into fuse holder.
5) Replace and secure the rear cover, battery and battery cover.