Hoyt 2660CL User manual

AC/DC DIGITAL
CLAMP METER
INSTRUCTION MANUAL

1. INTRODUCTION
NOTE
This meter has been designed and tested According
to Safety Requirements for Electronic Measuring
Apparatus, IEC-61010 and other safety standards.
Follow all warnings to ensure safe operation.
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WARNING
READ "SAFETY NOTES" (NEXT PAGE)
BEFORE USING THE METER.

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2. SAFETY NOTES
Read the following safety information carefully before
attempting to operate or service the Meter.
● Use the meter only as specified in this manual；
otherwise the protection provided by the meter
may be impaired.
● Always keep hands behind the meter barrier.
● Use extreme caution when clamping around
uninstalled conductors or bus bars.
● Never clamp around any conductor carrying a
voltage above 600V R.M.S.
● Rated environmental conditions :
● Observe the international Electrical Symbols listed
1.Indoor use.
2.Installation category Ⅲ.
3.Pollution degree Ⅱ.
4.Altitude up to 2000 meter.
5.Relative humidity 80% max.
6.Ambient temperature 0°~40°C.
Meter protected throughout by double
insulation or reinforced insulation.
Warning ! Risk of electric shock.
Caution ! Refer to this manual before using
the meter.
Alternating current.
Earth (ground) terminal.

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3. FEATURES
● 4000- count LCD.
● Full automatic measurement.
Voltage measurement.
Current measurement.
Resistor measurement.
Frequency counter.
Capacitor measurement.
● Range change function.
● Data Hold function freezes the reading.
● REL function.
● Peak function.
● Bargraph indication.
● Diode measurement.
● Max/Min function.
● Continuity check.
● Low battery indication.
● Auto Power Off (APO) function.
● Safety design throughout with no exposed metal parts,
shielded banana plugs and recessed input terminals.
IEC/EN 61010-1
IEC/EN 61010-2-032 CAT.600V

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4. GENERAL
● Overload protection： ACV 600V rms
DCV 600V
Frequency & Ohm 500V rms
● Conductor Size： Approx. 35mm max
● Dimensions：  210mm(L) x 90mm(W) x 40mm(D)
● Weight：  Approx. 330g(battery included)
● Power source：
One type PP3, 6F22, 006P(or equivalent), 9V manganese.
● Operating Principle： Dual slope integration.
● Over rage indication： " O.L " indicated.
● Low Battery Indication：
" " sign appears on the display when the battery
voltage drops below accurate operating level.
● Response Time： Approx. 1 second.
● Sample Rate： Approx. 2 times per second.
● Temperature & Humidity for Guaranteed：
-0°C to 50°C at < 80% max. relative humidity.
● Storage Temperature & Humidity：
-10°C to 60°C at < 80% max. relative humidity.
● Battery Life：
Approx. 100 hours on continuous use.(Alkaline)
● Accessories：
Test leads, Carrying Case, instruction Manual

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(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(13)
(12)
5. INSTRUMENT LAYOUT

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(1) Transformer Jaws
Pick up the AC current or DC current flowing through the
conductor. The "-" marking on the jaw indicates direction of
DC current existing on the conductor being tested which
follows forward and vertically with jaws, the reading shown
on display is positive.
(2) Barrier
Provide a protective distance from hands to conductor.
(3) Jaw Trigger
Press the lever to open the transformer jaws.
When the lever is released, the jaws will close again.
(4) Function selector rotary switch
The rotary switch selects the function.
(5) LCD Display
The LCD display indicates the function mode, bar graph,
annunciator, and measured value of a signal. Field effects
3¾ digit LCD with maximum reading of 3999.
(6) Volt/Ohm/Frequency Terminal
This is positive input terminal for voltage / ohm /
frequency measurement. Use the RED test lead to connect.
(7) COM Terminal
This is the ground input terminal. Use the BLACK test lead
to connect.

( 8 ) RANGE Button
Press the RANGE button to selects the manual range
mode .and turns off the AUTO annunciator and turns on
the MANUAL annunciator. In manual range mode,
each time press RANGE button (less than one second),
the range increments and a new value is displayed.
To exit the manual range mode and return to auto mode,
press the RANGE button (more than one second).
( 9 ) Hold Button
Press the HOLD button (HOLD annunciator turns
on) makes the meter stop updating the display.
This mode can nested in most of the special
modes. Enabling HOLD function in AUTO mode
makes the meter switch to MANUAL mode, but the
full scale range remain the same. HOLD function
can be cancelled by changing the measurement
mode, pressing the RANGE button, or Press the
HOLD button again.
(10) REL Button
The "REL" mode means relative mode. Press the
REL button, the REL annunciator turns on, zero
the display, and store the displayed reading as a
reference value. Press the REL button more than 1
second to exit the REL mode. In the REL mode, the
value shown on the display is always difference
between the stored reference value and the
present reading. If the new reading is the same as
the reference value, the display will be zero. This
function is also made DCA zero adjustment.
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(11) PEAK Button
The PEAK mode is used to measure the peak
value of a signal. It is useable with AC Current
measurements. Press the PEAK button, the PMAX
annunciator turns on, and the display shows the
maximum peak value. When the PEAK button is
pressed again (less than one second), the PMIN
annunciator turns on, PMAX annunciator turns off
and the display shows the minimum peak value.
When the PEAK button is pressed for the third
time (less than one second), the PMAX and PMIN
PMIN annunciators are blinking, and display
shows current input value. The meter returns to
normal operation if the PEAK button is pressed
and held for longer than one second.
(12) SELECT Button
If SELECT button pressed in ACV or ACA
measurement mode, the meter enters frequency
counter mode with automatic range selection.
Therefore, pressing RANGE button in VAHZ mode
doesn't change the frequency range. However,
range changes the sensitivity of frequency
detection.
If the input signal has a small amplitude, the user
shall increase the sensitivity.
If SELECT button pressed in Ω measurement
mode, the meter exchange to Continuity Check &
Diode Measurement selection.
If press this key in these function circulation.
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(13) MAX / MIN Button
Press button to enter the MAX/MIN recording
mode. When the MAX/MIN button is pressed for
the first time, the "MAX" annunciator turns on, and
the display shows the maximum value. When the
MAX/MIN button is pressed again (less than one
second), the "MIN" annunciator turns on, and the
display shows the minimum value. When the
MAX/MIN button is pressed for the third time (less
than one second), the MAX and MIN annunciators
are blinking, and display shows current input
value. The meter returns to normal operation if the
MAX/MIN button is pressed and held for longer
than one second. Pressing the HOLD button in
MAX/MIN mode makes the meter stop updating
the maximum or the minimum value.
(14) Auto Power Off (APO)
This meter has a default auto power off function
(APO annunciator turns on). If the meter idles for
more than 30 minutes, the meter automatically
turns the power off. When this happens, the state
of the meter is saved. In order to disable auto
power off function, power on the meter when any
of the push function, except for HOLD, is pressed
down.

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6. MEASUREMENT
Before proceeding with measurement, read the safety notes.
(1) Voltage measurement
Insert the BLACK test lead to COM and the RED
one to the other terminal.
Switch to ACV range for AC voltage or DCV range
for DC Voltage.
Use the test lead tip to the circuit and read the reading of
display directly.
If the reading exceed AC 600V(DC 600V), maybe the reading
value is wrong and it is dangerous. (refer to the safety notes)
(2) Current measurement
Switch to ACA range for AC current or DCA for DC current.
If the initial reading of DCA is not zero, press the REL button
to adjust.
Make sure that the test lead is not connect to the terminal.
Press the jaw trigger to open the transformer jaws and clamp
onto one conductor only.
Read the display reading directly.
(3) Resistance Measurement
Switch to OHM range and make sure there is no power in the
circuit being measured. Insert the BLACK lead to the COM
and the RED one to another.
Connect the test leads to the circuit or device under test and
read the display directly.
(4) Continuity Check
Continuity check shares the same configuration with
200.0 manual resistance measurement mode, but with
buzzer output to indicate continuity.
The buzzer generates a 2KHz sound whenever the digit
number less than 35 . Because the cycle time of
measurement is only 70ms, the least significant digit
will not display.

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(5) Diode Measurement
Diode measurement mode shares the same configuration
with 2.000V manual voltage measurement mode.
If the test circuit is open or the voltage drop between the two
ports of the device (diode) under test are larger than 2V,
the LCD panel will show "OL".
The buzzer generates a 2KHz sound whenever the digit
number is less than 0.25V. Because the cycle time of
measurement is only 70ms, the least significant digit will \
not display.
(6) Capacitance measurement
Switch to capacitance measurement mode.
Insert the BLACK test lead to COM and the RED one to the
other terminal.
Connect the test leads to the capacitance test and
read the display directly.
In order to obtain an accurate reading, a capacitor
must be discharged before measurement begins.
The chip has a built-in discharge mode to in discharge
mode, the LCD displays DS.C discharging through the chip
is quite slow.
We recommend the user to discharge the Capacitor with
some other apparatus.
(7) Frequency measurement
Switch to frequency measurement mode.
Insert the BLACK test lead to COM and the RED
one to the other terminal.
Apply the test leads to the points across which
the frequency is to be measured, and read the
result directly from the display.

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7. MAINTENANCE
Battery replacement
When low battery warning appears, change a new
battery as follows:
(1) Disconnect the test leads from the instrument and
turn off power.
(2) Unscrew the battery cover and replace a new battery.
WARNING
To avoid electrical shock or damage to the
meter, do not get water inside the case.
Periodically wipe the case with a damp cloth and
detergent. Do not use abrasives or solvents.
If the meter is not used for over 60 days, remove the
battery for storage.
Cleaning and Storage
CAT IV - Is for measurements performed at the
source of the low voltage installation.
CAT III - Is for measurements performed in the
building installation.
CAT II - Is for measurement performed on circuits
directly connected to the low voltage installation.
CAT I- Is for measurements performed on circuits
not directly Connected to Mains.