C-LOGIC 8900 User manual
C-LOGIC 8900
Digital clamp meter
USER MANUAL
Security requirements.............................................1
Safety instructions...................................................2
Safety signs .............................................................2
DeGeneral description ............................................2
Characteristic...........................................................3
Select wheel functions...........................................6
Key functions ..........................................................7
LCD screen.............................................................10
Operation Manual ..................................................12
Test data storage...................................................21
Read saved data ...................................................22
RS232C communication interface.......................22
Input current and voltage.....................................23
Backlit display........................................................23
Auto off..................................................................23
Secure clamping diagram.....................................24
Power curve diagram ...........................................25
Low battery indication..........................................26
Replacing the batteries.........................................26
General specification............................................28
Technical specification..........................................28
Accessories ...........................................................31
Replacing the test leads.................... ...................32
Replacing the batteries.........................................32
CONTENTS CONTENTS
Security requirements
Please read the instruction manual carefully before using
the clamp and pay special attention to the "Warnings."
Please follow the instructions in the "Warnings".
1. Please be very careful when the test voltage is higher
than 30V AC, and take care that your fingers do not
exceed the protection barrier of the test leads.
2. Do not measure voltage higher than the permitted limit
values.
3. Before use, please check the clamp and test leads; do
not carry out measurements if the leads are bare, the
caliper housing is damaged, there is no LCD display, etc.
4. The requirements of the safety regulations are met
only when the clamp is used in conjunction with the
supplied test leads. In the event that the cables are
damaged and need to be replaced, it is necessary to use
others of the same model and identical technical
specifications.
5. Please never carry out voltage measurements if the
test leads are connected to a current output.
6. Please do not expose the clamp to strong light, high
temperature or humidity.
Warning
Before use, please read this instruction manual
carefully. Especially the safety contents!
01 02
Security instructions
This three-phase wattmeter is designed and manufactured
in accordance with the EN61010-1 safety standard and the
IEC1010-2-032 international safety specification and
meets the CATIII 600V AC double insulation safety
requirement.
Safety signs
Important safety information, see the instruction
manual.
High voltage risk
Ground
Double insulation (Category II safety
equipment)
Low battery indicator
CAT III (OVERVOLTAGE CATEGORY III): Measurement
category III is suitable for testing and measuring circuits
connected to the distribution part of the building's low
voltage installation.
General description
The 3-phase wattmeter is a portable, smart harmonic power
tester with both current and power measurement. The
instrument is composed of three channels including voltage,
current and power as well as a single micro chip and is
equipped with powerful software for measurement and data
processing functions; It can measure, calculate and display
voltage, current, active power, power factor, apparent power,
passive power, frequency and harmonic parameters, with
stable performance and ease of operation. The instrument is
especially suitable for measuring and
examination of on-site power equipment and power supply
circuits; With a small and lightweight portable clamp
structure, it can be easily carried by the user, making
measurements quick and easy. For single-phase / three-
phase power measurements, this instrument is the ideal
choice.
Characteristics
1. The clamp can be used to measure power, voltage,
current, peak value, phase, frequency, power factor,
phase angle, reactive factor, etc. single-phase / three-
phase circuits; automatic checking of the phase
sequence is possible for three-phase measurements.
2. True RMS Measurement - Accurate measurement is
possible even with strong distortion in the current
waveform.
3. A high speed and low consumption single chip
microprocessor is used and a sophisticated algorithm is
used, resulting in great speed and precision in obtaining
results and the possibility of measuring the distortion value
and up to the 20th harmonic.
4. It is equipped with a large memory
to record up to 100 groups of test parameters.
5. A recording interface is equipped and
RS232C communication and specialized graphics software
for WINDOWS.
6. Clip-type format, portable, lightweight and suitable for
transporte.
03 04
Appearance
1
2
3
4
5
8
6
7
~
~
kW
1 PHASE
Ø
1 PHASE
kW/Ø
3 PHASE
HARM
A~
V~
HARM
°
APS
RS232
HOLD REC
FS
LAG
LEAD
RST
CAL
USED
READ
MEMO
COSΦ
SINΦ
MAX MIN
VA
kWh
PEAK
%THD
kVA
Hz
HzA
PEAK
kWVAh
POWER CLAMP METER
Yrue RMS
Harmonic
AUTO RANGE
MODE I U READ
CLEARRS232
Watt
SET
COM/V2 EN61010-1
600V CAT III
V3V1
HOLD
OFF
05 06
1. Size of the current jaw: Φ 50 mm.
2. HOLD key: data hold key; press the HOLD key, the last
reading on the screen will freeze and the “HOLD” symbol will
be displayed; press the HOLD key again and the clamp will
return to normal measurement mode.
3. Function selection wheel: selection wheel for choosing the
measurement function.
4. Function selection key: key to manage measurement
functions.
5. Input terminals:
Terminal Funtion
V1
Input terminal to measure the first phase;
use the yellow test lead for connection
COM/V2
Input terminal to measure the second
phase; use the black test lead for
connection.
Common terminal: ground input terminal for
all measurement functions; use the black
test lead for connection
V3
Input terminal to measure the third phase;
use the green test lead for connection
6. LCD display: 4-digit digital display; 7-segment LCD to
display measurement function, result, and unit symbol.
7. Trigger: press the trigger and the clamp will open;
release it and the clamp will close.
8. RS232C interface: the specialized optical-electrical
interface cable is used for online communication with the
PC, as well as for data logging and data trend curve on
the PC.
Select wheel functions
The function selector wheel is used for switching on and for
selecting the measurement function according to the
following table:
SymbolWheel position Functions
OFF OFF position To turn off the clamp
KW
(1 fase)
Active power
position
To measure active
power, etc.
Φ
(1 fase)
Single phase phase
angle check position
To measure the phase
angle, such as cos Φ
and sin Φ, etc.
KW/Φ
(3 fase)
Three-phase apparent
power position
To measure three-phase
apparent power, etc.
A~ AC current harmonics
check position
To measure harmonics
of AC current, etc.
V~
AC voltage
harmonics check
position
To measure AC
voltage harmonics,
etc.
Note:
When the caliper turns off automatically, be sure to turn the
wheel to the “OFF” position; turn on the clamp after 5
seconds.
Key functions
Description of the keys
SN Function selection key
1MODE: Mode select key - test
2SET: setting key
3I: current test key
4WATT:power test selection key
5U: voltage test key
6READ: data read key
7RS232: RS232C key
8CLEAR: memory clear key
9: tbacklight key
10 : increase key
11 : decrement key
12 REC/SAVE: data logging and storage key
13 HOLD: reading hold key
The following operations can be performed using the keys:
WATT key
In measurement mode, you can measure active power,
apparent power, power factor and phase angle and display
the results on the LCD screen by pressing the WATT key.
MODE key
In kW measurement mode, press the MODE key to toggle
between the active power and reactive power display; In A /
V ~ measurement mode, you can toggle between displaying
the total harmonic distortion ratio Fr and the harmonic
percentage.
07
SET key
In the measurement mode, you can press the SET key and
then the and keys , you can adjust the current and
voltage scale and then press the SET key again to return to
normal mode. This key also serves as a confirmation key
during storage and deletion.
U key
In measurement mode, you can press this key to check the
voltage in the circuit under test and show the measured
voltage on the screen.
READ key
In HOLD mode, you can press this key to display the stored
data; press this key again to return to normal mode.
I key
In measurement mode, you can press the I key to measure
the current in the circuit under test and display the current
measured by the clamp on the LCD screen.
RS232 key
In the measurement mode, you can press the RS232 key to
transfer the current results to the PC via the specific
interface cable supplied with the clamp for the purpose of
recording / printing data and data trend graph.
Before pressing the RS232 key for transfer
data, the RS232C interface cable must be connected to the
RS232C port of the clamp and to the COM port of the PC, to
perform the communication functions.
08
SAVE to display voltage, current, max / min power. which is
actually measured; In reading hold mode, press this key to
display the storage position; press the SET key again to
save the frozen data on the screen in memory. Up to 100
groups of data can be stored in the gripper.
HOLD key
After measurement, press this key to freeze the data on the
LCD screen; After shutdown, the data will be displayed.
LCD Screen
09 10
CLEAR key
In data reading mode, you can press the CLEAR key and
then the SET key to clear the test data stored in the clamp at
a specified position.
Key
You can press the key to turn the backlight on or off.
After being on for 20 seconds, it will turn off automatically.
Key
In the tension scale setting mode, you can press the key
to change the tension scale. During the harmonic check, you
can change the order of the harmonics.
When reading the stored data, you can press the key to
advance through memory locations and display them on the
LCD screen. With each press of the key, the search cursor
will advance one position on the previous data.
Key
In the current scale setting mode, you can press the key
to change the voltage scale. During the harmonic check, you
can change the order of the harmonics.
When reading the stored data, you can press the key to
go back through the memory locations and display them on
the LCD screen. With each press of the key, the search
cursor will go back one position on the previous data.
REC / SAVE key
In measurement mode, you can press the REC /
°
APS
RS232
HOLD REC
FS
LAG
LEAD
RST
CAL
USED
READ
MEMO
COSΦ
SINΦ
MAX MIN
VA
kWh
PEAK
%THD
kVA
Hz
HzA
PEAK
kWVAh
LCD symbol Description LCD symbol Description
RS232 Data
transference REC Data register
APS Auto OFF FFast
HOLD Read retention SSlow
LAG Phase
angle delay LEAD
Phase
angle Lead
Low battery
indication oPhase Angle
(Degrees)
SINΦ
Reverse
power factor COSΦ Power factor
RST triphasic Normal phase
Symbol C.A. Reverse phase
Lack of phase Negative
symbol
MIN Minimum value MAX Maximum value
USED Used MEMO Save
READ Read VVoltage
WWatts ACurrent
VAr Reactive
power Hz Frequency
VA Apparent
power PEAK Peak value
%Harmonic
percentage
High voltage
warning sign
%THD Total harmonic distortion ratio
H01F Total harmonic distortion ratio F
(relative to main wave)
H01r Total harmonic distortion ratio F
(relative to the actual effective value)
Operation manual
AC voltage measurement (V)
11 12
ACV
Position Input
terminal V1
Input
terminal V2
Input
terminal V3
Object
under test
V~
Toma V1 Toma V2/
COM N/A Monofásico
Toma V1 Toma V2/
COM N/A Bifásico
Toma V1 Toma V2/
COM Toma V3 Trifásico
1. According to the connection mode indicated in the table
above, place the thumbwheel in the V ~ position, select the
corresponding sockets for the V1, V2 or V3 terminals and
insert the test leads.
2. Connect the two test leads V1, V2 to the power source or
load to be tested. The clamp will automatically perform the
measurement and display the result on the screen and the
percentage of harmonics present will be shown on the next
line.
3. In the voltage measurement function, press the SET key
to display “AUTO V” and “AUTO A” on the display and press
the key to select the appropriate voltage scale and
press SET again to return to normal mode.
4. Press the MODE key to show the harmonic percentage
on the screen and the total harmonic distortion ratio F and R
will be displayed cyclically. Press the keys to display
the value of each harmonic.
5. When the input voltage is higher than 50V, the symbol ()
will be displayed on the screen, warning of the risk.
13
AC current measurement (A)
14
NEUTRAL
3
2
1
3. After connecting correctly, you can measure single phase
power (active power, power factor, apparent power, reactive
power, voltage, current, phase angle, peak value of voltage
and current and frequency).
4. The clamp will perform automatic measurement and
display the active power, and at the bottom of the screen it
will indicate the voltage / current value of the load tested;
Press the MODE key to display the reactive power value on
the LCD screen; Press the WATT key to show the apparent
power and the power factor (cosᴓ); Negative power factor
means that the tested load has a capacitive component.
5. The maximum active power measurement scale is
600kW; If this scale is exceeded, the “OL” symbol will be
displayed on the screen. If the voltage is higher than 600V or
the current is higher than 1000A, the “OL” symbol will be
displayed on the LCD.
1. Set the thumbwheel to position A ~.
2. Press the trigger to open the jaw, and then hug the lead
of the circuit to be measured. The measured current will
be displayed on the LCD screen.
3. Press the MODE key to display the percentage of
harmonics and the ratio of harmonic distortion F and r will
be displayed cyclically.
4. Press the keys to display the value of each
individual harmonic.
If the current through the measured cable is greater than
1000A (RMS), the symbol “OL” will be indicated instead of
the current value.
Notes:
1. You can select the AUTO / FIXED test frequency at 50 /
60Hz. When the input waveform fluctuates, the harmonic
values can be kept stable by selecting the Fixed 50/60 Hz
mode.
2. In the AUTO test frequency mode, the FFT calculation is
only performed when the frequency of the fundamental wave
is between 45 and 65 Hz. If that frequency is outside of that
range, harmonic analysis is not performed.
Single-phase circuit test
1. Clamp the power or charging cable with the clamp. If you
want to measure a specific phase of a three-phase system,
only wrap around the cable corresponding to that phase.
2. Set the thumbwheel to the KW position, select the
corresponding sockets for terminals V1 or V2 and insert the
test leads.
15
°
APS
RS232
HOLD REC
FS
LAG
LEAD
RST
CAL
USED
READ
MEMO
COSΦ
SINΦ
MAX MIN
VA
kWh
PEAK
%THD
kVA
Hz
HzA
PEAK
kWVAh
~
3 PHASE
1PHASE
1PHASE
HARM
HARM
Power supply
Load
Yellow
Black
600V~
MAX
600V~
MAX
~
16
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