CEM DT-360 User manual

OPERATING INSTRUCTION
AC CLAMP METER
Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must refer
to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present
Double insulation
SAFETY NOTES
•Do not exceed the maximum allowable input range of any function
•Do not apply voltage to meter when resistance function is selected.
•Set the function switch OFF when the meter is not in use.
WARNINGS
•Set function switch to the appropriate position before measuring.
•When measuring volts do not switch to current/resistance modes.
•When changing ranges using the selector switch always disconnect the test leads from
the circuit under test.
•Do not exceed the maximum rated input limits.
CAUTIONS
Improper use of this meter can cause damage, shock, injury or death. Read and understand
this user manual before operating the meter.
Always remove the test leads before replacing the battery.
Inspect the condition of the test leads and the meter itself for any damage before operating
the meter. Repair or replace any damage before use.
Use great care when making measurements if the voltages are greater than 25VAC rms or
35VDC. These voltages are considered a shock hazard.
Remove the battery if the meter is to be stored for long periods.
Always discharge capacitors and remove power from the device under test before
performing Diode, Resistance or Continuity tests.
•Voltage checks on electrical outlets can be difficult and misleading because of the
uncertainty of connection to the recessed electrical contacts. Other means should be used
to ensure that the terminals are not "live".
•If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Input Limits
Function
Maximum Input
A AC
400A
V DC, V AC
600V DC/AC
Resistance, Diode, Continuity ,
250V DC/AC

Meter Description
1. Current clamp
2. Non-contact AC voltage indicator light
3. Clamp trigger
4. Rotary Function swith
5. Data Hold button
6. Back light button
7. LCD display
8. MODE select button
9. Range button
10. MAX hold button
11. COM input jack
12. V ΩCAP TEMPHz jack
13. Battery Cover
1. AC DC AC (alternating current)
and DC (direct currrent)
2. Minus sign
3. 8.8.8.8 2000 count (0 to 1999)
measurement reading
4. AUTO AutoRange mode
5. REL Relative mode
6. Diode test mode
7. •))) Audible Continuity
8. HOLD Data Hold mode
9.
℃
,
℉
,µ,m,V,A,K,M,
Ω
,Units of measure list
10. MAX MAX hold mode
Specifications
Function
Range & Resolution
Accuracy (% of reading)
AC Current
(50/60Hz)
2.000AAC
± (2.5 % + 10 digits)
20.00AAC
± (2.5 % + 4digits)
200.0AAC
± (2.5 % + 4digits)
400.0 AAC
± (3 % + 4digits)
DC Voltage
200.0 mVDC
± (0.8% + 2 digits)
2.000 VDC
± (1.5% + 2digits)
20.00 VDC
200.0 VDC
600.0 VDC
± (2 % + 2digits)
AC Voltage
200.0 mVAC
± (1.5% + 35 digits)
2.000 VAC
± (1.8% + 8 digits)
20.00 VAC
200.0 VAC
600.0 VAC
± (2.5% + 8digits)
Resistance
200.0 Ω
± (1.0% + 4 digits)
2.000KΩ
± (1.5% + 2 digits)
20.00KΩ
200.0KΩ
2.000MΩ
± (2.5% + 3 digits)
20.00M
Ω
± (3.5% + 5 digits)
Clamp size Opening 1.2" (30mm) approx
Diode Test Test current of 0.3mA typical; Open circuit voltage 1.5V DC
typical.
Continuity Check Threshold <150Ω; Test current < 0.5mA
Low Battery Indication “ ” is displayed
Overrange Indication “OL”” is displayed
Measurements Rate 2 per second, nominal
Input Impedance 10MΩ(VDC and VAC)
Display 2000 counts LCD
AC Current 50-60Hz (AAC)
AC Voltage bandwidth 50-60Hz (VAC)
Operating Temperature 41 to 104oF (5 to 40oC)
Storage Temperature -4 to 140oF (-20 to 60oC)
Operating Humidity Max 80% up to 87°F (31°C) decreasing linearly to 50% at
104°F(40°C)
Storage Humidity <80%
Operating Altitude 7000ft. (2000meters) maximum.
Over voltage Category III 600V
Battery One 9V Battery
Auto OFF approx. 15 minutes
Dimensions/Weight 197x70x40mm/183g
Safety For indoor use and in accordance with Overvoltage Category
II, Pollution Degree 2. Category II includes local level,
appliance, portable equipment, etc., with transient
overvoltages less than Overvoltage Cat. III
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6 7 8
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10

Operation
NOTICES: Read and understand all warning and precaution statements listed in the
safety section of this operation manual prior to using this meter. Set the function
select switch to the OFF position when the meter is not in use.
AC Current Measurements
WARNING: Ensure that the test leads are
disconnected from the meter before making current
clamp measurements.
1. Set the Function switch to the 400.0A ~ 2.000A range.
2. If the range of the measured is not known,
select the higher range first then move to the lower
range if necessary.
3. Press the trigger to open jaw. Fully enclose one conductor
to be measured.
The clamp meter LCD will display the reading.
DC/AC Voltage Measurements
1. Insert the black test lead into the negative COM terminal and the
red test lead into the positive Vterminal.
2. Set the function switch to the V position.
3. Select AC or DC with the MODE button.
4. Connect the test leads in parallel to the circuit under test.
5. Read the voltage measurement on the LCD display.
Resistance Measurements
1. Insert the black test lead into the negative COM terminal and the
red test lead into the positive terminal.
2. Set the function switch to the Ω •))) position.
3. Touch the test probe tips across the circuit or component under
test. It is best to disconnect one side of the device under test so
the rest of the circuit will not interfere with the resistance reading.
4. For Resistance tests, read the resistance on the LCD display.
Diode and Continuity Measurements
1. Insert the black test lead banana plug into the negative COM jack and the red test lead
banana plug into the positive diode jack.
2. Turn the rotary switch to the Ω•))) position.
3. Press the MODE button until “ “ appears in the display.
4. Touch the test probes to the diode under test. Forward voltage will indicate 0.4V to 0.7V.
Reverse voltage will indicate “OL”. Shorted devices will indicate near 0mV and an open
device will indicate “OL” in both polarities.
For Continuity tests, if the resistance is < 150Ω, a tone will sound.
Non-Contact AC Voltage Measurements
1. Touch the probe tip to the hot conductor or insert into the hot side of the electrical outlet.
2. If AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often twisted. For best results, rub the probe tip
along a length of the cord to assure placing the tip in close proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static electricity or other sources of energy
may randomly trip the sensor. This is normal operation
MODE BUTTON
To select DC/ACV,OHM/ Diode/Continuity
Data Hold Button
To freeze the LCD meter reading, press the data hold button. The data hold button is
located on the left side of the meter (top button). While data hold is active, the HOLD
display icon appears on the LCD. Press the data hold button again to return to normal
operation.
MAX Hold Button
The max. Hold position is used to measure the maximum value. The maximum
measured value is up dated continuously. Press once again the button, will release
the hold and allow a further measurement.
RANGE BUTTON
When the meter is first turned on, it automatically goes into AutoRanging. This automatically selects the
best range for the measurements being made and is generally the best mode for most measurements.
For measurement situations requiring that a range be manually selected, perform the following:
1. Press the RANGE button. The “Auto Range” display indicator will turn off, The “Manual Range”
display indicator will turn on
2. Press the RANGE button to step through the available ranges until you select the range you want.
3. Press and hold the RANGE button for 2 seconds to
exit the ManualRanging mode and return to AutoRanging.
Battery Replacement
1. Remove the one rear Phillips head screw
2. Open the battery compartment
3. Replace the Requires One 9V Battery.
4. Re-assemble the meter
Red Black Black Red
Probe Probe Probe Probe
Forward test Reverse test
WARNING: Risk of Electrocution. Before use,
always test the Voltage Detector on a known live
circuit to verify proper operation