HoldPeak HP-770H - Digital Multimeter Manual

Overview

The multimeter is characterized at slim size, portable, stable performance and anti-dropping capacity. Using 6000 counts digit LCD monitor with character 25mm 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, duty cycle, temperature, transistor hFE, Non Contact AC Voltage (NCV) detection, positive diode voltage fall and audible continuity.

Panel Layout

1. NCV detection area: Non Contact AC Voltage (NCV) detection area.
2. CDS sensor: The CDS sensor can reaction to the ambient brightness range, then automatically control the LCD backlight to lighten or go out.
3. NCV red light: Non Contact AC Voltage (NCV) detection red light.
4. NCV green light: Non Contact AC Voltage (NCV) detection green light.
5. LCD display: 6000 counts digit, full function symbol display.
6. SELECT key: This key work on the " " range, press the key to choose resistance, diode or continuity test, on the voltage or current range, change to DC or AC, on the °C/°F range, change to °C or °F test; If press and hold SELECT key to power on, "Auto Power Off " function will be disabled.
7. RANGE Key: Press the "RANGE" key, the meter enters manual range mode, press it more than 2 seconds again, return to auto mode.
8. REL Key: Press the "REL " key, 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.
9. Hz/Duty Key: On "ACV/ACA" or "Hz" range, press the "Hz/Duty" key, you can choose the Frequency or Duty Cycle measurement.
10. HOLD key: Press the "HOLD" key to lock display value, and the "DH" sign will appear on the display, press it again to exit.
11. MAX/MIN key: Press the "MAX/MIN" key to lock MAX, MIN or MAX-MIN value, and the "MAX", "MIN" or "MAX-MIN" sign will appear on the display, press it over 2 seconds to exit.
12. Rotary Switch: Use this switch to select functions and ranges.
13. μAmAT+: μAmAand Temperature "+" Input Jack
14. 20A: 20AInput Jack
15. VΩHz : V/Hz/ Input Jack
16. COMT-: COM and Temperature "-" Input Jack
17. Transistor hFE test Input Jack
18. Crust of meter
19. Protective casing

Safety Information

1. The meter is designed according to IEC-1010 concerning electronic measuring instruments with an over-voltage category 1000V (CAT III) and pollution 2.
2. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition.
3. safety symbols:
   Important safety information, refer to the operating manual.
   Dangerous voltage may be presence.
   Double insulation (protection Class II)

Special Cautions for Operation

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.
2. To avoid risk of electric shock, do not use the meters before the cover is in place.
3. The range switch should be right position for the testing.
4. To avoid electric shock and damaging the instruments, the input signals are forbidden to exceed the specified limits.
5. When measuring TV set or switched power, attention should be paid to the possible pulses that may bring destruction to the circuit.
6. Range switch position is forbidden to be changed at random during measurement.
7. Take caution against shock in the course of measuring voltage higher than DC 60V & AC 30V.
8. Protection fuse should be replaced only with same type and same specification.
9. After operation is finished, set function switch at OFF to save battery power.
10. If the meter is without usage for long time, take out battery to avoid damage by battery leakage.

GENERAL SPECIFICATIONS

1. Max Voltage between input terminal and Earth Ground: CAT III 1000V
2. Over-range Indication: display "OL" for the significant digit.
3. Automatic display of negative polarity "-".
4. Low Battery Indication: " " displayed.
5. Max LCD display: 6000 counts digit.
6. Auto range & Manual range control
7. Auto Power Off: When measurement exceeds 15 minutes without switching mode and pressing key, the meter will switch to standby mode. Press any key to exit standby mode.
   When restart the system, press and hold SELECT key to disable auto power off.
8. Auto LCD backlight
9. Fuse protection: 800mA/500V Fast Fuse, 20A/500V Fast Fuse
10. Power supply: 1.5V×2 "AA" R6P battery
11. Operating Temp.: 0°C to 40°C (relative humidity <85%)
12. Storage Temp.: -10°C to 50°C ((relative humidity <85%)
13. Guaranteed precision Temp.: 23±5°C (relative humidity <70%)
14. Dimension: 195x88x40mm
15. Weight: approx. 350g (including battery)

Testing Specifications

Accuracy is specified for a period of year after calibration and at 18_℃°C to 28°C (64°F to 82°F) with relative humidity to 70%.

DC Voltage

• Impedance: 10MΩ, More than 100MΩ on 60mV/600mV range
• Overload protection: 1000V DC or 750V AC rms

AC Voltage (True RMS)

• Impedance: 10MΩ, More than 100MΩ on 60mV/600mV range
• Overload protection: 1000V DC or 750V AC rms
• Frequency Range: 40 to 400Hz

DC Current

• Overload protection: 800mA/500V Fast Fuse
  20A/500V Fast Fuse, 20A up to 10 seconds

AC Current (True RMS)

• Overload protection: 800mA/500V Fast Fuse
  20A/500V Fast Fuse, 20A up to 10 seconds
• Frequency Range: 40 to 400Hz

Resistance

• Overload protection: 500V DC or AC rms

Capacitance

• Overload protection: 500V DC or AC rms

Frequency

• Sensitivity: sine wave 0.6V rms (9.999MHz: 1.5V rms)
• Overload protection: 500V DC or AC rms

Duty cycle

0.1%_~99.9%: ± ( 2.0% of rdg + 2 digits ), Frequency lower than 10kHz

• Sensitivity: sine wave 0.6V rms
• Overload protection: 500V DC or AC rms

Temperature

• NiCr-NiSi K-type sensor
• Overload protection: 800mA/500V Fast Fuse

Diode and Audible continuity test

Range	Description	Test Condition
	Display read approximately forward voltage of diode	Forward DC current approx. 1.5mA Reversed DC voltage approx. 3.2V
	Built-in buzzer sounds if resistance is less than 50Ω	Open circuit voltage approx. 1V

Overload protection: 500V DC or AC rms

Transistor hFE test

Test range: 0-1000
Ib=10µA, Vce=1.8V Approx.

Non Contact AC Voltage (NCV) detection

Test voltage range: 90V ~ 1000V AC rms
The NCV red light and green light will light up alternately together with sound.

OPERATING INSTRUCTIONS

Attention before operation

1. Check battery. When the battery voltage drop below proper operation range, the " " symbol will appear on the LCD display and the battery need to changed.
2. Pay attention to the " " besides the input jack which shows that the input voltage or current should be within the specified value.
3. The range switch should be positioned to desired range for measurement before operation.

Measuring DC & AC Voltage

1. Connect the black test lead to COMT- jack and the red to VΩHz jack.
2. Set the rotary switch at the desired "mV " or "V " range position, it shows symbol for testing DC voltage, if you want to test AC voltage, push "SELECT" button switch.
3. Connect test leads across the source or load under measurement.
4. You can get reading from LCD. The polarity of the red lead connection will be indicated along with the DC voltage value.

NOTE:

1. " " means you can't input the voltage more than 1000V DC or 750V AC, it's possible to show higher voltage, but it may destroy the inner circuit or pose a shock.
2. Be cautious against shock when measuring high Voltage.

Measuring DC & AC Current

1. Connect the black test lead to COMT- jack and the red to the μAmAT+ jack for a maximum 600mA current, for a maximum 6A or 20A current, move the red lead to the 20A jack.
2. Set the rotary switch at the desired "uA " & "mA " & "A " range position, it shows symbol for testing DC current, if you want to test AC current, push "SELECT" button switch.
3. Connect test leads in series with the load under measurement.
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 800mA and 20A's maximum current is 20A, over 800mA or 20A current can be protected by the fast fuse.
4. On the 20A range, the measuring time should be less than 10 seconds to prevent precision from affecting by circuit heating.

Measuring Resistance

1. Connect the black test lead to COMT- jack and the red to VΩHz jack.
2. Set the rotary switch at the desired " " range position.
3. Connect test leads across the resistance under measurement.
4. You can get reading from LCD.

NOTE: Max. input overload: 500V rms 10sec

1. For measuring resistance above 1MΩ, the mete may take a few seconds to get stable reading.
2. When the input is not connected, i.e. at open circuit, the figure 'OL' will be displayed for the over-range condition.
3. When checking in-circuit resistance, be sure the circuit under test has all power removed and that all capacitors have been discharged fully.

Measuring Capacitance

1. Connect the black test lead to COMT- jack and the red to VΩHz jack.
2. Set the rotary switch at the desired " " range position.
3. Connect test leads across the capacitance under measurement.
4. You can get reading from LCD.

NOTE: Max. input overload: 500V rms 10sec

1. Capacitors should be discharged before being tested.
2. When testing large capacitance, it will take longer time before the final indication ( For 100uF~99.99mF range, it will take about 10 seconds ).
3. When testing small capacitance (≤1uF), to assure the measurement accuracy, first press "REL ", then go on measuring.

Measuring Frequency & Duty cycle

1. Connect the black test lead to COMT- jack and the red to VΩHz jack.
2. Set the rotary switch at the desired "Hz" range position.
3. Push "Hz/Duty" key to choose Frequency or Duty cycle test.
4. Connect the probe across the source or load under measurement.
5. You can get reading from LCD.

Measuring Temperature

1. Connect the black banana plug of the sensor to COMT- jack and the red banana plug to the μAmAT+ jack.
2. Set the rotary switch at the desired "°C/°F" range position, push "SELECT" to choose °C or °F measurement.
3. Put the sensor probe into the temperature field under measurement.
4. You can get reading from LCD.

NOTE:

1. The accessory of the meter WRNM-010 type contact thermocouple limit temperature is 250°C (300°C shortly), please use special probe for test higher temperature.
2. Please don't change the thermocouple at will, otherwise we can't guarantee to measure accuracy.
3. Please don't importing the voltage in the temperature function.

Diode & Audible continuity Testing

1. Connect the black test lead to COMT- jack and the red to VΩHz jack.
2. Set the rotary switch at the " " range position, push "SELECT" to choose Diode or Audible continuity measurement.
3. On diode range, connect the test leads across the diode under measurement, display shows the approx. forward voltage of this diode.
4. On Audible continuity range, connect the test leads to two point of circuit, if the resistance is lower than approx. 50Ω, the buzzer sounds.

NOTE: Make sure the power is cut off and all capacitors need to be discharged under this measurement.

Transistor hFE Test

1. Set the rotary switch at the desired "hFE" range position.
2. Determine whether the transistor is NPN or PNP and locate the Emitter, Base and Collector leads. Insert the leads into the proper holes in the socket on the front panel.
3. You can get reading of the approximate hFE value from LCD.

NOTE: Don't connect an external voltage to measuring terminals.

Non Contact AC Voltage detection

1. Set the rotary switch at the desired "NCV" range position, the NCV green LED light will light up.
2. Hold the Meter so that the mater's top is vertically and horizontally centered and contacting the conductor, when the live voltage ≥ 90V AC rms, the NCV red LED light and green LED light will light up alternately together with sound.

NOTE:

1. Even without LED indication, the voltage may still exist. Do not rely on non-contact voltage detector to determine the presence of voltage wire. Detection operation may be subject to socket design, insulation thickness and different type and other factors.
2. When the meter input terminals presence voltage, due to the influence of presence voltage, voltage sensing indicator may also be bright.
3. Keep the meter away from electrical noise sources during the tests, i.e., florescent lights, dimmable lights, motors, etc.. These sources can trigger Non-Contact AC Voltage detection function and invalidate the test.

Battery replacement

1. When the battery voltage drop below proper operation range the " " symbol will appear on the LCD display and the battery need to changed.
2. Before changing the battery, set the selector switch to "OFF" position and remove the test leads from the terminals. Open the cover of the battery cabinet by a screwdriver.
3. Replace the old battery with the same type battery (AA R6P 1.5V×2). 8-4 Close the cover of the battery cabinet and fasten the screw.

Fuse replacement

1. This meter is provided with a 800mA/500V fast fuse to protect the battery test, temperature test and the current measuring circuits which measure up to 600mA, with a 20A/500V fuse to protect the 20A range.
2. Ensure the meter is not connected to any external circuit, set the selector switch to "OFF" position and remove the test leads from the terminals. Open the cover of the battery cabinet by a screwdriver.
3. Replace the old fuse with the same type and rating: 6×30mm 800mA/500V fast fuse or 6×30mm 20A/500V fast fuse.
4. Close the cover of the battery cabinet and fasten the screw.

Maintenance

1. You must replace the test leads if the lead is exposed, and should adopt the leads with the same specifications as origin.
2. Use only moist fabric or small amount of detergent but not chemical solution for cleaning.
3. 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.
4. Please take out the battery when not using for a long time.

Accessories

1. Test Leads: electric rating 1000V 20A
2. "K" type thermocouple sensor probe
3. Operator's Manual

Above picture and content just for your reference. Please be subject to the actual products if anything different or updated. Please pardon for not informing in advance.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download HoldPeak HP-770H - Digital Multimeter Manual