General Technologies CM1000 : 1000 Amps AC/DC Current Clamp Meter - Manual

1. SAFETY RULES
• This meter is designed for indoor use at temperatures between 0°C to 40°C and
altitudes up to 2,000m.
• To ensure that the meter is used safely, follow all safety and operating instructions
in this operation manual. If the meter is not used as described in this operation
manual, the safety features of this meter might be impaired.
• Do not use the meter if the meter or test leads look damaged ,or if you suspect that
the meter is not operating properly.
• When using the instrument, keep your fingers behind the finger guards on the
plastic casing and probes.
• Disconnect the live test lead before disconnecting the common test lead.
• Make sure power is off before cutting, desoldering, or breaking the circuit wires.
Small amounts of current can be dangerous.
• Do not apply more than 1000 VDC or 1000V AC rms between a terminal and
ground.
• To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC
rms. Such voltages pose a shock hazard.
• Never make measurements with the battery cover off.
• To avoid electrical shock or damage to the meter, do not exceed the input limits.
2. INTERNATIONAL SYMBOLS
Important information Dangerous Voltages
see manual Continuity
AC Ground
DC Double Insulation
3. TECHNICAL SPECIFICATIONS
3.1 General Specifications
Display: 4 digits LCD, 9999 counts and engineering
units annunciator display
Polarity: Automatic, (-) negative polarity indication
Zero adjustment: One touch button
Sample rate: 0.5 Sec.
Peak hold sample time: 10 mS for DCV and DCA
Over range indication: Only the “OL” is displayed
Power: 2x UM-4 or AAA 1.5 Volt battery
Auto power off: Automatically powers off after 30 min. of
no operation
Battery life: Approx. 50 hours. (w/ alkaline batteries)
Clamp opening size: 25 mm maximum.
Dimension: 189 x 70 x 34 mm.
Weight: Approx. 220 g. (Including battery)
Accesories: User’s Manual, Soft Carrying Pouch, Test
Leads and 2 x AAA Alkaline Batteries
3.2 Electrical Specifications
• The mark next to the probe tip, is a warning that the input voltage
should not exceed the indicated values. This is to prevent damage to
the internal circuitry.
• The function switches should be set to the function which you want to
test before operation.
• Accuracies are ±(% of reading + number of least significant digits) at
23°C ±5°C, less than 75% RH.
4. OPERATION
4.1 INSTRUMENT DESCRIPTION
1) Current sensing clamp
2) Safety protection ring
3) Clamp opening handle
4) LCD Display
5) COM input terminal
6) Positive input terminal
7) Zero button
8) Function selection knob
9) Peak/Data hold button
Function Range Resolution Accuracy Remarks Overload Protection
DC Current 1000 A 0.1 A ±(2.5%+10) - 1020 Arms
AC Current 1000 A 0.1 A ±(2%+10) 50~500Hz 1020 Arms
DC Voltage 1000 V 0.1 V ±(1%+2) - 1020 Vrms
AC Voltage 1000 V 0.1 V ±(1.5%+5) 50~500Hz 1020 Vrms
Resistance 100K� 10 � ±(1%+3) - 660 Vrms
Continuity Beeps when < 1K� 3VDC Max. Test Voltage 660 Vrms
4.2 LCD Screen Description
4.3 Current Measurement
CAUTION: Remove all test leads connected to the instru-
ment before proceeding with this test.
4.3.1 DC Current Measurement
Set the function selector knob to (DCA) and press the Zero button,
the will appear in the display. Open the clamp by pressing the clamp
opening handle, insert the cable or wire inside the current sensing clamp,
and then close the clamp and read from the LCD screen.
4.3.2 AC Current Measurement
Set the function selector knob to (ACA). Open the clamp by pressing the
clamp opening handle, insert the cable or wire inside the current sensing
clamp, and then close the clamp and read from the LCD screen.
600V CATII 300V CATIII 600A
H HOLD
OFF
A
A
V
V
ZERO
P H
A
600V CATII
300V CATIII
600V
COM
1
2
3
4
5
8
9
7
6
P PEAK Press
2 Sec
General Technologies Corp.
CM1000
1000 Amp AC/DC Clamp Meter
600V CATII 300V CATIII 600A
H HOLD
OFF
A
A
V
V
ZERO
P H A
600V CATII 300V CATIII
600V
���
P PEAK Press 2 Sec
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600V CATII 300V CATIII 600A
H HOLD
OFF
A
A
V
V
ZERO
P H A
600V CATII 300V CATIII
600V
���
P PEAK Press 2 Sec
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Wrong Right
AUTO P H
A
V
Relative Indicator
AC/DC Indicator
Low Battery
Auto Power Off
Digital Reading Ohm Indicator
Voltage Indicator
Ampere Indicator
Continuity
Data Hold
Peak Hold