HoldPeak HP-37C 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 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, battery test, Non Contact AC Voltage (NCV) detection,
positive diode voltage fall and audible continuity.
2. Panel Layout
1. Test lead fixture: Fix the test lead.
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 detection area: Non Contact AC Voltage (NCV) detection area.
4. NCV red light: Non Contact AC Voltage (NCV) detection red light.
5. NCV green light: Non Contact AC Voltage (NCV) detection green light.
6. LCD display: 6000 counts digit, full function symbol display.
7. SELECT key: This key work on the "
diode, continuity or capacitance test, on the voltage or current range, change to DC or AC, on the
range, change to ℃ or ℉ test; If press and hold SELECT key to power on, "Auto Power
Off " function will be disabled.
8. RANGE Key: Press the "RANGE" key, the meter enters manual range mode, press it more than
2 seconds again, return to auto mode.
9. HOLD key: Press the "HOLD" key to lock display value, and the "DH" sign will appear on the
display, press it again to exit.
10. 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.
11. Hz/% Key: On "ACV/ACA" or "Hz" range, press the "Hz/%" key, you can choose the
Frequency or Duty Cycle measurement.
12. Rotary Switch: Use this switch to select functions and ranges.
13. COM: COM and Temperature "-" Input Jack
15. VΩmA: V/μAmA/Hz/BATT/
16. Crust of meter 17.Protective casing
3. Safety Information
3-1 The meter is designed according to IEC-1010 concerning electronic measuring instruments
with an over-voltage category 600V (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 600V
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 counts digit.
5-6 Auto range & Manual range control
5-7Auto 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.
" range, press the key to choose resistance,
14. 10A: 10AInput Jack
and Temperature "+" Input Jack
5-8 Auto LCD backlight
5-9 Fuse protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V 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: 150x106x36mm
5-15 Weight: approx. 250g (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
600.0mV 0.1mV
6.000V 1mV
60.00V 10mV
600.0V 100mV
600V 1V
-- Impedance: 10MΩ, More than 100MΩ on 600mV range
-- Overload protection: 600V DC or AC rms
6-2 AC Voltage (True RMS)
Range Resolution
600.0mV 0.1mV
6.000V 1mV
60.00V 10mV
600.0V 100mV
600V 1V
-- Impedance: 10MΩ, More than 100MΩ on 600mV range
-- Overload protection: 600V DC or AC rms
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
Range Resolution
600μA 0.1μA
6000μA 1μA
60mA 10μA
600mA 100μA
6A 1mA
10A 10mA
-- Overload protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V Fuse, 10A up to 10 seconds
6-4 AC Current (True RMS)
Range Resolution
600μA 0.1μA
6000μA 1μA
60mA 10μA
600mA 100μA
6A 1mA
10A 10mA
-- Overload protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V Fuse, 10A up to 10 seconds
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-5 Resistance
Range Resolution
600Ω 0.1Ω
6kΩ 1Ω
60kΩ 10Ω
600kΩ 100Ω
6MΩ 1kΩ
60MΩ 10kΩ
-- Overload protection: 250V DC or AC rms
6-6 Capacitance
Range
9.999nF
±(3.0% of rdg + 10 digits)
99.99nF
999.9nF ±(2.5% of rdg + 5 digits)
9.999µF
99.99µF
±(5.0% of rdg + 10 digits)
999.9µF
9.999mF ±(10.0% of rdg + 20 digits)
99.99mF
-- Overload protection: 250V DC or AC rms
6-7 Frequency
Range Accuracy
9.999Hz
99.99Hz
999.9Hz
9.999kHz ± (0.1% of rdg + 5 digits)
99.99kHz
999.9kHz
9.999MHz
-- Sensitivity: sine wave 0.6V rms (9.999MHz: 1.5V rms)
-- Overload protection: 250V DC or AC rms
6-8 Duty cycle
Accuracy
±(0.5% of rdg + 2 digits)
±(0.8% of rdg + 2 digits)
Accuracy
±(5.0% of rdg + 5 digits)
±(1.0% of rdg + 3 digits)
±(1.5% 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
Accuracy
1pF
10pF
100pF
1nF
10nF
100nF
1µF
10µF
Resolution
0.001Hz
0.01Hz
0.1Hz
1Hz
10Hz
100Hz
1kHz