HoldPeak 850E User manual

850E
DIGITAL DUAL DISPLAY AC CLAMP MULTIMETER
OPERATION MANUAL
This LCD Auto Range & Auto Power off Digital AC clamp multi
meter is a portable, 3 1/2-digit multi meter. It is ideally suited for
field, laboratory, shop and home applications.
1. SAFETY INFORMATION
The following safety information must be observed to in sure
maximum personal safety during the operation at this meter.
1) When measuring voltage ensure that instrument is not switched
to the current range, resistance range, diode and continuity range,
temperature range.
2) Use extreme care when measuring voltage above 50V.
especially from sources where high energy is existed.
3) Avoid making connections to "live" circuits whenever possible.
4) Before making resistance measurements, diode or continuity
test, temperature test, ensure that the circuit under test is
de-energized.
5) Always ensure that the correct function and range is selected.
6) Extreme care should be taken when using the instrument to
conjunction with a current transformer connected to the terminals if
an open circuit occurs.
7) Ensure that the test leads and probes are in good condition with
no damage to the insulation.
8) Take care not to exceed the over-load limits as given in the
specifications.
9) Before opening the cover of the battery cabinet to replace
batteries. disconnect the test leads from any external circuit, set
the selector switch to "OFF" position.
10) Keep the fingers after the protection ring when measuring
through the instrument lead.
11) Change the battery when the symbol “ ” appears to avoid
incorrect data.
2. Panel Layout
1）HOLD key：In any range, push the key, the present display value
will be locked and the " H D " symbol will appear, push it again to
exit HOL and the " H D " symbol disappear.
2）Rotary Switch: use this switch to select functions and ranges
3）RANGE key：Push the key to select manual mode, push it again
to change the range, press the key for more than 2 seconds to go
back auto range mode.
4）MAXH key: Push MAXH key, will test max value for AC/DC
voltage or AC/DC current(not a peak value).Push again, cancel
this function.
5）SELECT key：This key work on the " " range. Push the key
to choose diode or continuity test.. Press “SELECT”in ＂℃/℉＂
rang , press direct for ℃/ 0F select.
6）Back Light key: Press “BLCTR” button more than 2 seconds, the
back light will light, press it more than 2 seconds again, the back
light will light off.
7）LCD Display：LCD Dual Display, facilitates reads the data.
8）T+V ΩInput Jack 、COM Input Jack、T-Input Jack
9) Clamp Light easy for test the electric current in hidden place.
2. SPECIFICATIONS
2.1 GENERAL SPECIFICATIONS
Display: 3 1/2 digit LCD with a max. reading of 1999.
Range control: Auto range or manual range control.
Polarity: Automatic negative polarity indication.
Zero adjustment: Auto malic.
Over range indication: Only the "OL" display.
Low battery: The " " is display when the battery voltage is below
2.4V.
Auto Power Off: 15 minutes after stopping the switch or no push
button, the meter automatically enter to power off mode. Push
button or run switch, auto power off disable.
Safety Standards: The meter is up to the standards of IEC1010
Double Insulation, Pollution Degree 2, Overvoltage Category Ⅲ.
Clamp opening size: 45mm.
Operating Environment: Temperature 32～104°F(0～40℃),
humidity＜80%RH.
Storage Environment: Temperature -4～140°F(-20～
60℃),humidity＜90%RH.
Power supply: 9V Zinc-carbon battery.
Dimension: 275(H)×120(W)×33(D)mm.
Weight: Approx. 580g (including batteries).
2.2 ELECTRICAL SPECIFICATIONS
Accuracies are ±(% of reading +number in last digit)
at 23±5℃,≤75%RH.
2.2.1 DC Voltage
Range
Accuracy
Resolution
200mV
1.0% of rdg+15digits
0.1mV
2V
1.0% of rdg+8digits
1mV
20V
10mV
200V
100mV
1000V
1.0% of rdg+10 digits
1V
Overload protection: 1000V DC/750Vrms AC
Impedance: 10MΩ，More than100MΩon 200mV scale
2.2.2 AC Voltage
Range
Accuracy
Resolution
Frequency
200mV
2.0% of rdg+15 digits
0.1mV
50～400Hz
2V
1.0% of rdg+15 digits
1mV
20V
10mV
200V
100mV
750V
1.5% of rdg+15 digits
1V
50～100Hz
Average sensing, calibrated to rms of sine wave
Overload protection: 1000V DC/750Vrms AC
Impedance: 10MΩ，More than 100MΩon 400mV scale
2.2.3 AC Current
Range
Accuracy
Resolution
Frequency
2A
4.0% of rdg+20 digits
1mA
50～60Hz
20A
3.0% of rdg+20 digits
0.01A
50～60Hz
200A
0.1A
50～60Hz
2000A
0～1000
3.5% of rdg+20 digits
1A
1000～2000
6.5% of rdg+15 digits
Average sensing, calibrated to rms of sine wave
Overload protection: 1000Arms within 60 seconds
2.2.4 Resistance
Range
Accuracy
Resolution
200Ω
1.0% of rdg+25 digits
0.1Ω
2kΩ
1.0% of rdg+15 digits
1Ω
20kΩ
10Ω
200kΩ
100Ω
2MΩ
1kΩ
20MΩ
2.0% of rdg+20 digits
10kΩ
Overload protection: 250V DC/250Vrms AC
2.2.5 Temperature(NiCr-NiSi sensor)
Range
Accuracy
Resolution
℃/℉
-20~150℃
-4~302℉
±(3℃+2)
1℃/1℉
150~300℃
302~572℉
±(3% of rdg+2digits)
300~1000℃
572~1800℉
±(3.5% of rdg+10digits)
Overload protection: 36V DC/36Vrms AC

2.2.8 Diode and Audible continuity test
Range
Description
Test condition
Display read approx.
forward voltage of
diode
Forward DC current
approx. 0.7mA
Reversed DC voltage
approx. 1.5V
Built-in buzzer sounds if
resistance is less than
70Ω
Open circuit voltage
approx. 0.45V
Overload protection: 250V DC/250Vrms AC
3. MEASURING INSTRUCTION
3.1 DC Voltage measurement
1) Connect the black test lead to "COM" socket and red test lead
to the "VΩT＋" socket.
2) Set the selector switch to desired " " position and connect the
probes across the source or load under measurement.
3) Read the result from the LCD panel.
3.2 AC Voltage measurement
1) Connect the black test lead to "COM" socket and red test lead
to the " VΩT＋" socket.
2) Set the selector switch to desired " " position and connect
the probes across the source or load undermeasurement.
3) Read the result from the LCD panel.
3.3 AC Current measurement
1) Set selector switch to desired " " position.
2) Open the clamp by pressing the jaw-opening handle and insert
the cable (one cable only) to be measured into the jaw.
3) Close the clamp and get the reading from the LCD panel.
Note:
a) Before this measurement, disconnect the test lead with the
meter for safety.
b) In same occasion that the reading is hard to read, push the
HOLD button and read the result later.
3)When in measuring voltage can click on the "range" key for "mV"
and "V" conversion
3.4Resistance measurement
1) Connect the black test lead to "COM" socket and red test lead
to the " VΩT＋" socket.
2) Set the selector switch to desired "Ω" position, the present
function is resistance measurement.
3) Connect the probes across circuit to be tested.
4) Read the result from the LCD panel.
Caution: Ensure that the circuit to be tested is "dead". Max. input
over-load: 250V rms＜10sec
3.5 Diode test
1) Connect the black test lead to "COM" socket and red test
lead to the " VΩT＋" socket.
2) Set the selector switch to " " position.
3) Push "SELECT" to select diode test.
4) Connect the black and red test probe to the cathode (-) and
anode (+) ends of diode to be tested respectively, read the forward
voltage drop (junction) value from the display. If reverse connected
the probes to diode, display shows over-load.
Caution: Ensure that the circuit to be tested is "dead". Max .input
over-load: 250V rms＜10sec
3.6 Audible continuity test
1) Connect the black test lead to "COM" socket and red test lead
to the " VΩT＋" socket.
2) Set the selector switch to " " position.
3) Push "SELECT" to select audible continuity test.
4) Connect the probes across circuit to be tested, the beeper
sounds continuously if the resistance is less than approx. 70Ω.
Caution: Ensure that the circuit to be tested is "dead". Max .input
over-load: 250V rms＜10sec
3.9 Temperature measurement
1) Connect the black test lead of the sensor to "T-" socket and
the red test lead to the "T＋" socket.
2) Set the selector switch to "℃/℉" position.
3) Put the sensor probe into the temperature field under
measurement.
4) Read the result from the LCD panel.
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 in closure 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 ;
D. Please don’t importing the voltage in the temperature function.
3.10 Auto/Manual Range Control
The auto range mode is a convenient function, but it might be
faster to manually set the range when you measure values that
you know to be within a certain range .To select manual range
control, repeatedly press "RANGE" until the display shows
the desired range. The range steps upward as you press "RANGE".
But when you press "RANGE" for more than 2 seconds, then it can
go to auto range mode.
Caution: While suing the manual range control, if "OL" appears on
the display and you hear an intermittent tone, immediately set
RANGE to a higher range.
4. CARE AND MAINTENANCE
4.1 CARING FOR YOUR MULTIMETER
Your Digital Multi meter is an example of superior design and
craftsmanship. The following suggestions will help you care for the
multi meter so you can enjoy it for years.
1) Keep the multi meter dry. If it gets wet, wipe it dry immediately.
Liquids can contain minerals that can corrode electronic circuits.
2) Use and store the multi meter only in normal temperature
environments. Temperature extremes can shorten the life of electronic
devices, damagebatteries and distort or melt plastic parts.
3) Handle the multi meter gently and carefully. Dropping it can
damage the circuit boards and cause and can accuse the multi
meter to work improperly.
4) When take current measurement, keep the cable at the center
of the clamp will get more accurate test result.
5) Keep the multi meter away from dust and dirt, which can cause
premature wear of parts.
6) Wipe the multi meter with a damp cloth occasionally to keep it
looking new. Do not use harsh chemicals, cleaning solvents, or
strong detergents to clean the multi meter.
7) Use only fresh batteries of the required size and type. Always
remove old or weak batteries. They can leak chemicals that
destroy electronic circuits.
8) Please take out the battery when not using for a long time.
4.2 9Volt battery replacement
1) Ensure the instrument is not connected to any extreme circuit.
Set the selector switch to "OFF" position and remove the test leads
from the terminals.
2) Open the cover of the battery cabinet by a screwdriver.
3) Replace the old batteries with the same type batteries.
4) Close the battery cabinet cover and fasten the screw.