HoldPeak 770G Operator's Manual

DIGITAL MULTIMETER
OPERATOR'S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and anti-dropping
capacity. Using 4000 counts digit 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, duty cycle, temperature, transistor hFE, Non Contact AC Voltage (NCV) detection,
positive diode voltage fall and audible continuity.
2. Panel Layout
NCV detection area: Non Contact AC Voltage (NCV) detection area.
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CDS sensor: The CDS sensor can reaction to the ambient brightness range, then
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automatically control the LCD backlight to lighten or go out.
NCV red light: Non Contact AC Voltage (NCV) detection red light.
3
NCV green light: Non Contact AC Voltage (NCV) detection green light.
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LCD display: 6000 counts digit, full function symbol display.
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SELECT key: This key work on the "
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diode or continuity test, on the current range, change to DC or AC; If press and hold SELECT
key to power on, "Auto Power Off " function will be disabled.
RANGE Key: Press the "RANGE" key, the meter enters manual range mode, press it more
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than 2 seconds again, return to auto mode.
REL▲ Key: Press the "REL▲" key, the meter enters relative measuring mode, "REL" is
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displayed on the LCD and the present reading becomes the reference value and displayed on
the display. Relative measurement REL△=measurement value-Reference value. Press it
again to exit.
Hz/Duty Key: On "ACV/ACA" or "Hz" range, press the "Hz/Duty" key, you can choose the
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Frequency or Duty Cycle measurement.
HOLD key: Press the "HOLD" key to lock display value, and the "DH" sign will appear on the
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display, press it again to exit.
NCV Key: Press and hold the "NCV" key, the meter enters Non Contact AC Voltage (NCV)
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detection, the NCV green LED light will light up, free it to exit.
Rotary Switch: Use this switch to select functions and ranges.
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μAmAT+: μAmAand Temperature "+" Input Jack
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20A: 20AInput Jack
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VΩHz : V/Hz/
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COMT-: COM and Temperature "-" Input Jack
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Transistor hFE test Input Jack
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Crust of meter
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Protective casing
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3. Safety Information
3-1 The meter is designed according to IEC-1010 concerning electronic measuring instruments with
an over-voltage category 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 range 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 Range 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 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 Ⅲ 1000V
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: 4000 counts digit.
770G
" range, press the key to choose resistance,
Input Jack
5-6 Auto range & Manual range control
5-7Auto Power Off: When measurement exceeds 30 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.
5-8 Auto LCD backlight
5-9 Fuse protection: 500mA/500V Fast Fuse, 20A/500V Fast Fuse
5-10 Power supply: 1.5V×2 "AA" R6P battery
5-11 Operating Temp.: 0℃ to 40℃ (relative humidity <85%)
5-12 Storage Temp.: -10℃ to 50℃ ((relative humidity <85%)
5-13 Guaranteed precision Temp.: 23±5℃ (relative humidity <70%)
5-14 Dimension: 195x88x40mm
5-15 Weight: approx. 350g (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
400mV 0.1mV
4V 1mV
40V 10mV
400V 100mV
1000V 1V
-- Impedance: 10MΩ, More than 100MΩ on 400mV range
-- Overload protection: 250V DC or AC rms for 400mV range,
effective 1000V DC or 750V AC rms for other ranges
6-2 AC Voltage
Range Resolution
400mV 0.1mV
4V 1mV
40V 10mV
400V 100mV
750V 1V
-- The 400mV range be selected by press "RANGE" key only
-- Impedance: 10MΩ, More than 100MΩ on 400mV range
-- Overload protection: 250V DC or AC rms for 400mV range,
effective 1000V DC or 750V AC rms for other ranges
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
Range Resolution
400μA 0.1μA
4000μA 1μA
40mA 10μA
400mA 100μA
4A 1mA
20A 10mA
-- Overload protection: 500mA/500V Fast Fuse
20A/500V Fast Fuse, 20A up to 10 seconds
6-4 AC Current
Range Resolution
400μA 0.1μA
4000μA 1μA
40mA 10μA
400mA 100μA
4A 1mA
20A 10mA
-- Overload protection: 500mA/500V Fast Fuse
20A/500V Fast Fuse, 20A up to 10 seconds
-- Frequency Range: 40 to 400Hz
--
Response: average, calibrated in rms of sine wave
6-5 Resistance
Range Resolution
400Ω 0.1Ω
4kΩ 1Ω
40kΩ 10Ω
400kΩ 100Ω
4MΩ 1kΩ
40MΩ 10kΩ
-- Overload protection: 500V DC or AC rms
6-6 Capacitance
Range
Accuracy
51.2nF ±(3.0% of rdg + 10 digits)
512nF
5.12µF ±(2.5% of rdg + 5 digits)
51.2µF
100µF
±(5.0% of rdg + 10 digits)
-- Overload protection: 500V DC or AC rms
6-7 Frequency
Range Accuracy
5.12Hz
51.2Hz
512Hz
5.12kHz ± (0.1% of rdg + 5 digits)
51.2kHz
512kHz
5.12MHz
Accuracy
±(0.5% of rdg + 2 digits)
±(0.8% of rdg + 2 digits)
Accuracy
±(1.2% of rdg + 3 digits)
±(0.8% of rdg + 3 digits)
±(1.2% of rdg + 3 digits)
Accuracy
±(1.2% of rdg + 2 digits)
±(2.0% of rdg + 3 digits)
Accuracy
±(1.5% of rdg + 3 digits)
±(2.5% of rdg + 5 digits)
Accuracy
±(1.0% of rdg + 3 digits)
±(1.0% of rdg + 2 digits)
±(1.5% of rdg + 3 digits)
Resolution
10pF
100pF
1nF
10nF
100nF
Resolution
0.001Hz
0.01Hz
0.1Hz
1Hz
10Hz
100Hz
1kHz