HoldPeak 90B User manual

90B 6000 DIGITS AUTO CAL
DIGITAL MULTIMETER OPERATOR’S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and
anti-dropping capacity. Using 6000 digits LCD monitor with character 22mm high,
they offer clear readings. With overall circuitry design centering on large-scale IC
A/D converters in conjunction and over-load protection circuit, the meters give
excellent performance and exquisite making as a handy utility instrument.
The meters can be used to measure DC & AC voltage, DC & AC current, resistance,
capacitor, Frequency, positive diode voltage fall,Battery power, Temperature and
Continuity.
2. Panel Layout
①LCD Display: 6000 digits, full function symbol display
②SELECT key:This key work on the "CAP Ω" range , Push the key to choose
resistance, diode ,continuity test, on the voltag or current range,change to DC/AC,
and ℃/℉range , change to ℃/℉
③Hz/DUTY Key: In “ACV/ACA” or “Hz” range, push the key, you can measure
the Hz ,push again, can measure the duty.
④HOLD/ Back Light key：In any range, push the key, the present display value will
be locked and the " H " symbol will appear, push it again to exit HOLD and the "
H"symbol disappear. Press “HOLD” button more than 2 seconds, the back light will
light, press it more than 2 seconds again, the back light will light off.
⑸MAX/MIN key：Push the key to select MAX mode, push it again to change MIN
mode, push once again to change max-min,press the key for more than 2 seconds
to go back auto range mode. And Push the key to change manual range mode .But
in Hz/Duty and Capacitance measurement, it can not use.
⑥REL Key: Pressing this button, the meter enters relative measuring mode, “REL”
is displayed on the LCD and the present reading becomes the reference value and
displayed on the display. Relative measurement REL△=measurement
value-Reference value.
⑦RANGE Key: Pressing this button, the meter enters mancal range mode, press
it more than 2 seconds again, return to auto mode
⑧Rotary Switch: use this switch to select functions and ranges
⑨Illuminative window
⑩V ΩInput Jack、10A Input Jack、mA Input Jack 、COM Input Jack
3. Safety Information
3-1 The meters are designed according to IEC-1010 concerning electronic
measuring instruments with an over-voltage category 600V (CAT IV)/1000V(CAT III)
and pollution 2.
3-2 Follow all safety and operating instructions to ensure that the meter is used
safely and is kept in good operating condition.
3-3 safety symbols:
important safety information, refer to the operating manual.
Dangerous voltage may be presence.
Double insulation (protection Class II)
4. Special Cautions for Operation
4-1 The meters can be safe only according to standard procedures when used in
conjunctions with the supplied test leads. To replace damaged test leads with only
the same model or same electric specifications.
4-2 To avid risk of electric shock, do not use the meters before the cover is in place.
4-3 The Rotary switch should be right position for the testing.
4-4 To avoid electric shock and damaging the instruments, the input signals are
forbidden to exceed the specified limits.
4-5 When measuring TV set or switched power, attention should be paid to the
possible pulses that may bring destruction to the circuit.
4-6 Rotary switch position is forbidden to be changed at random during
measurement.
4-7 Take caution against shock in the course of measuring voltage higher than DC
60V & AC 30V.
4-8 Protection fuse should be replaced only with same type and same specification.
4-9 After operation is finished, set function switch at OFF range to save battery power.
4-10 If the meter is without usage for long time, take out battery to avoid damage
by battery leakage.
5. GENERAL SPECIFICATIONS
5-1 Max Voltage between input terminal and Earth Ground: CAT Ⅳ600V
5-2 Over-range Indication: display “OL” for the significant digit.
5-3 Automatic display of negative polarity “_” .
5-4 Low Battery Indication: „ ‟ displayed
5-5 Max LCD display: 6000 digits; capacitor, Frequency range: 9999 digits
5-6 auto ranges
5-7 Fuse protection: F-800mA/1000V (Ø 6x32mm) F-10A/1000V (Ø 10x38mm)
5-8 Power Supply: 9V Zinc-carbon battery
5-9 auto power-off：15minites,Push SELECT Key,Atuo power Off disable;
5-10 Operating Temp.: 0℃to 40℃(relative humidity <85%)
5-11 Storage Temp.:-10℃to 50℃((relative humidity <85%)
5-12 Guaranteed precision Temp.: 23± 5 ℃(relative humidity <70%)
5-13 Dimension: 193×88× 41mm
Weight: approx.320g (including battery)
6. Testing Specifications
Accuracy is specified for a period of year after calibration and at 18℃to 28℃
(64℉to 82℉) with relative humidity to 70%.
6-1 DC Voltage
range
resolution
accuracy
600mV
0.1mV
±(1.2% of rdg + 5 digit )
6V
1mV
± (0.8% of rdg +5 digits)
60V
10mV
± (0.8% of rdg +5 digits)
600V
100mV
± (0.8% of rdg +5 digits)
1000V
1V
± (1.5% of rdg +10 digits)
-- Input Impendence: 10MΩ, 60mV, 600mV range ＞100 MΩ
-- Overload protection: 250V for 400mV range, DC 1000V or AC 750V for other
ranges
6-2 AC Voltage(True RMS)
Range
Resolution
Accuracy
Sensitivity
600mV
0.1mV
±(2.5% of rdg +15 digit )
40HZ-1KHZ
6V
1mV
± 1.0% of rdg+10 digits
40HZ-400HZ
60V
10mV
± 1.0% of rdg+10 digits
40HZ-400HZ
600V
100mV
± 1.0% of rdg+10 digits
40HZ-400HZ
750V
1V
± 1.0% of rdg+10 digits
40HZ-400HZ
1. input impedance : > 10MΩ ; 60mV, 600mV range ＞100 MΩ
2. Overload protect : 250V for 400mV range, DC 1000V or AC 750V for other
ranges
6-3 DC Current
range
Resolution
accuracy
600uA
0.1μA
± (1.0% of rdg +5 digits)
6000uA
1μA
± (1.0% of rdg + 5 digits)
60mA
10μA
± (1.0% of rdg +5 digits)
600mA
100μA
± (1.0% of rdg +5 digits)
6A
1mA
±(1.5% of rdg + 5 digits)
10A
10mA
±(1.5% of rdg + 5 digits)
Overload protection:
4A &10A ranges: F10A/1000V fuse
Other ranges: F500mA/1000V fuse
10A up to 10 seconds
6-4 AC Current
range
Resolution
accuracy
600uA
0.1μA
± (1.5% of rdg +10digits)
6000uA
1μA
±(1.5% of rdg + 10 digits)
60mA
10μA
± (1.5% of rdg +10 digits)
600mA
100μA
± (1.5% of rdg + 10 digits)
6A
1mA
±(2.0% of rdg +10 digits)
10A
10mA
±(2.0% of rdg +20 digits)
Overload protection:
6A &10A ranges: F10A/1000V fuse
Other ranges: F800mA/1000V fuse
10A up to 10 seconds
Frequency Range: 40 to 1KHz
6-5 Resistance
range
Resolution
accuracy
600Ω
0.1Ω
± (1.2% of rdg +10 digits)
6KΩ
1Ω
± (1.2% of rdg +5 digits)
60KΩ
10Ω
± (1.2% of rdg +5 digits)
600KΩ
100Ω
± (1.2% of rdg +5digits)
6MΩ
1KΩ
± (1.5% of rdg +10 digits)
60MΩ
10KΩ
± (2.5% of rdg + 10 digits)
-- over-load protection: 600V effective value
6-7 Capacitor
range
Resolution
accuracy
9.999nF
0.001nF
± (3.0% of rdg +20 digits)
99.99nF
1pF
±(2.5% of rdg +10digits)
999.9nF
0.1nF
±(2.5% of rdg +10digits)
9.999μF
1nF
±(2.5% of rdg +10digits)
99.99μF
10nF
± (3.0% of rdg +10 digits)
999.9μF
0.1μF
± (3.0% of rdg +25 digits)
9.999mF
1μF
± (3.5% of rdg +25 digits)
99.99mF
10μF
± (3.5% of rdg +25 digits)
-- over-load protection: 600V effective value
6-8 Frequency Testing
range
resolution
Accuracy
9.999Hz
0.001Hz
± (0.5% of rdg + 15 digits)
99.99Hz
0.01Hz
999.9Hz
0.1Hz
9.999kHz
1Hz

99.99kHz
10Hz
999.9kHz
100Hz
9.999MHz
1kHz
Duty cycle: 1%～99% Accuracy: ±0.5
-- Overload Protection: 600V DC or rms AC, Sensitivity: Range of input
voltage:1.5V~10V, If input voltage over range,need adjust
6-9 Temperature(NiCr-NiSi sensor)
range
resolution
Accuracy
-4~1832℉
1℉
±(3% of rdg +5 digits)
-20~1000℃
1℃
±(3% of rdg +3 digits)
-- over-load Protection: 600V DC or rms AC
6-10 Diode Test
range
resolution
Function
1mV
Display: read approximate forward voltage of diode
-- over-load Protection: 250V effective value, forward DC current: approximate
1.5mA Reversed DC voltage: approximate 3.0V
6-11 Continuity
range
Function
Built-in buzzer will sound if resistance is lover than50Ω
-- over-load protection: 250V effective value
open circuit voltage: approximate 1.0V
6.12 Battery Power Test
Range
Accuracy
Test Condition
± (1.5% of rdg +5 digits)
Loading Current:
Approx. 25mA
Overload protection: DC/AC PEAK 15V
Battery voltage: 1.5V~12V
7. OPERATING INSTRUCTIONS
7-1 Measuring DC Voltage
7-1-1 Connect the black test lead to COM jack and the red to VΩHz jack.
7-1-2 Set the rotary switch at the desired V range position.
7-1-3 Connect test leads across the source or load under measurement.
7-1-4 You can get reading from LCD. The polarity of the red lead connection will be
indicated along with the voltage value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When only „OL‟ is displayed, it indicates over-range situation and the higher
range has to be selected.
3. “ ” means you can‟t input the voltage more than 1000V, it‟s possible to show
higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious against shock when measuring high Voltage.
7-2 Measuring AC Voltage
7-2-1 Connect the black test lead to COM jack and the red to VΩHz jack.
7-2-2 Set the rotary switch at the desired V~ range position.
7-2-3 Connect test leads across the source or load under measurement.
7-2-4 You can get reading from LCD.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When only „OL‟ is displayed, it indicates over-range situation and the higher
range has to be selected.
3. “ ” means you can‟t input the voltage more than 750V, it‟s possible to show
higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious against shock when measuring high Voltage.
7-3 Measuring DC & AC Current
7-3-1 Connect the black test lead to COM jack and the red to the μAmA jack for a
maximum 600mA current , for a maximum 6A or 10A current, move the red lead to
the 10A jack.
7-3-2 Set the rotary switch at the desired uA & mA & 10A range position, it shows
symbol for testing DC current, if you want to test AC current, push „select‟ button
switch.
7-3-3 Connect test leads in series with the load under measurement.
7-3-4 You can get reading from LCD. The polarity of the red lead connection will be
indicated along with the DC current value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When only „OL‟ is displayed, it indicates over-range situation and the higher
range has to be selected.
3. “ ” means the socket mA‟s maximum current is 600mA and 10A‟s maximum
current is 10A, over current will destroy the fuse.
7-4 Measuring Resistance
7-4-1 Connect the black test lead to COM jack and the red to VΩHz jack.
7-4-2 Set the rotary switch at the desired Ω range position.
7-4-3 Connect test leads across the resistance under measurement.
7-4-4 You can get reading from LCD.
NOTE:
1. When only „OL‟ is displayed, it indicates over-range situation and the higher
range has to be selected.
2. For measuring resistance above 1MΩ, the mete may take a few seconds to get
stable reading.
3. When the input is not connected, i.e. at open circuit, the figure „OL‟ will be
displayed for the over-range condition.
4. When checking in-circuit resistance, be sure the circuit under test has all power
removed and that all capacitors have been discharged fully.
5. the value scale to be measured is unknown beforehand, set the range selector
at the highest position.
7-5 Measuring Capacitor
7-5-1 Connect the black test lead to COM jack and the red to -II-jack.
7-5-2 Set the rotary switch at the desired “-II-”range position.
7-5-3 Before inserting capacitor under measurement into capacitance testing
socket, be sure that the capacitor has been discharged fully.
7-5-4 You can get reading from LCD.
Caution:
a) Capacitors should be discharged before being tested.
b) When testing large capacitance, it will take longer time before the
final indication(For 1uF~99.99mF range, it will take about 4~7
seconds).
c) When testing small capacitance（≤1uF）, to assur the
measurement accuracy, first press "REL", then go on measureing.
Max.input over-load: 250V rms＜10sec
7-6 Measuring Frequency
7-6-1 Connect the black test lead to COM jack and the red to Hz jack.
7-6-2 Set the rotary switch at the Hz range position.
7-6-3 Connect test leads across the source or load under measurement.
7-6-4 You can get a reading from LCD.
7-7 Temperature measurement
7-7-1 Connect the black test lead of the sensor to T- socket and the red test
lead to the "T+" socket.
7-7-2 Set the selector switch to "℃/℉" position.
7-7-3 Put the sensor probe into the temperasure field under measurement.
7-7-4 Read the result from the LCD panel.
NOTE: Max.input over-load: 250V rms＜10sec
A. The temperature function shows the random number at ordinary times, must
insert the thermocouple in temperature test hole while examining temperature.
B. This meter inclosure WRNM-010 type contact thermocouple limit
temperature is 250 ℃(300 ℃shortly ) ;
C. Please don't change the thermocouple at will , otherwise we can't guarantee
to measure accuracy ; Please don‟t importing the voltage in the temperature
function.
D. Please use special probe for test high temperature.
7-8 Diode Testing
7-8-1 Connect the black test lead to COM jack and the red to jack. (the polarity
of red lead is „+‟)
7-8-2 Set the rotary switch at the Ω range position, push „SELECT‟ button
switch until symbol of is displayed on LCD.
7-8-3 Connect the red lead to the anode and the black lead to the cathode of the
diode under testing.
7-8-4 You can get a reading from LCD.
NOTE:
1. The meter will show approximate forward voltage drop of the diode.
2. If the lead connections is reversed, only „OL‟ will be displayed.
7-9 Continuity Testing
7-9-1 Connect the black test lead to COM jack and the red to jack.
7-9-2 Set the rotary switch at the Ω range position, push „SELECT‟ button
switch until symbol of is displayed on LCD.
7-9-3 Connect test leads across two points of the circuit under testing.
7-9-4 If continuity exists (i.e. resistance less than about 50Ω), buzzer will sound.
NOTE:
If the input open circuit, the figure „OL‟ will be displayed.
Circuit under measurement should be power-off,
otherwise, any load signal can make the buzzer sound.
7-10 Battery Power Test
7-10-1 Set the FUNCTION switch to the “ ” range
7-10-2 Connect the BLACK test lead to “COM” jack and the RED test lead to the
“VΩ” jack.
7-10-3 Connect the BLACK test lead to the cathode and the RED test lead to the
anode of the battery under testing.
7-10-4 The LCD dispay Voltage of battery by testing with load
8. Maintenance
8-1 Before attempting to remove the battery door or open the case, be sure that
test leads have been disconnected from measurement circuit top avoid electric
shock hazard.
8-2 To avoid electrical shock, remove test leads from measurement circuits before
replacing the fuse. For protection against fire, replace fuses only with specified
ratings: F-800mA/1000V fuse or F-10A/1000V
8-3 Your must replace the test leads if the lead is exposed, and should adopt the
leads with the same specifications as origin.
8-4 Use only moist fabric or small amount of detergent but not chemical solution for
cleaning.
8-5 Do not use the meter before the back cover is properly closed and screw
secured. Upon any abnormality, stop operation immediately and send the meter
for maintenance.
8-6 Please take out the battery when not using for a long time.
9. Accessories
[1] Test Leads: electric rating 1000V 10A
[2] Fuse: F-800mA/1000V F-10A/1000V
[3] „K‟ type Thermocouple
[4] Operator‟s Manual