RS PRO RS 155B User manual


Instruction Manual
RS 155B (162-4455) / RS 156B (162-4456)
RS 157B (162-4457) / RS 158B (162-4458)
Clamp Meter
EN
RS 158B
Press 2 sec

1
150B Series / EN
Warning
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Safety sheet
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 Read First
Safety Information
Understand and follow operating instructions carefully.
Use the meter only as specified in this manual; otherwise, the
protection provided by the meter may be impaired.
 WARNING
Identifies hazardous conditions and actions that could cause
BODILY HARM or DEATH
CAUTION
Identifies conditions and actions that could DAMAGE the meter
or equipment under test
 WARNING
˙When using test leads or probes, keep your fingers behind
the finger guards.
˙ Individual protective equipment should be used if HAZARD-
OUS LIVE parts in the installation where measurement is to
be carried out could be ACCESSIBLE.
˙Remove test lead from meter before opening the battery
door or meter case.
˙Use the meter only as specified in this manual or the protec-
tion by the meter might be impaired.
˙ Always use proper terminals, switch position, and range for
measurements.
˙ Verify the meter’s operation by measuring a known voltage.
If in doubt, have the meter serviced.
˙Do not apply more than the rated voltage, as marked on
meter, between terminals or between any terminal and
earth ground.
˙Use caution with voltages above 30 V ac rms, 42 V ac peak,
or 60 V dc. These voltages pose a shock hazard.
˙To avoid false readings that can lead to electric shock and
injury, replace battery as soon as low battery indicator blinks.
˙Disconnect circuit power and discharge all high-voltage
capacitors before testing resistance, continuity, diodes, or
capacitance.
˙Do not use meter around explosive gas or vapor.
˙ To reduce the risk of fire or electric shock do not expose
this product to rain or moisture.
˙ Probe assemblies to be used for MAINS measurements
shall be RATED as appropriate for MEASUREMENT
CATEGORY III or IV according to EN 61010-031 and shall
have a voltage RATING of at least the voltage of the circuit
to be measured.
Warning Safety sheet

2
150B Series / EN
CAUTION
˙Disconnect the test leads from the test points before chang-
ing the position of the function rotary switch.
˙Never connect a source of voltage with the function rotary
switch in Ω, %,and position.
˙Do not expose meter to extremes in temperature or high
humidity.
˙ Never set the meter in Ω, %,and function to measure
the voltage of a power supply circuit in equipment that could
result in damage the meter and the equipment under test.
Symbols as marked on the Meter and Instruction
manual
Unsafe Voltage
To alert you to the presence of a potentially hazardous voltage,
when the Tester detects a voltage ≧30 V or a voltage overload
(OL) in V .The symbol is displayed.
Maintenance
Do not attempt to repair this meter. It contains no user
serviceable parts. Repair or servicing should only be performed
by qualified personnel.
Cleaning
Periodically wipe the case with a dry cloth and detergent.
Do not use abrasives or solvents.
Risk of electric shock
See instruction manual
DC measurement
Equipment protected by double or reinforced
insulation
Battery
Earth
AC measurement
Conforms to EU directives
EApplication around and removal from hazardous live
conductors is permitted
Do not discard this product or throw away.

3
150B Series / EN
Feature
˙10000 Count digital display
˙Active Backlit,Large scale display
˙VoltSeek (None Contact Voltage)
˙Analog Bar graph
˙True RMS reading on AC and AC+DC mode
˙Memory Save/Load (data amount up to 1000 )
˙Data logger (data amount up to 9999 )
˙Bluetooth wireless communication
˙Torch lightening when clamping
˙Auto AC/DC 1000 Amps capability and selection (For 158B)
˙Auto AC/DC 600 Amps capability and selection (For 156B)
˙Auto AC/DC 1000 Volts capability and selection
˙Auto Ohms/Continuity/Diode selection
˙100K Resistance capability
˙Continuity Beeper
˙Frequency Counter
˙Power and Power factor measurement
˙Total Harmonics distortion and Harmonics 1 to 25
˙Capacitance capability
˙°C / °F Temperature Function (For 158B)
˙Inrush Current
˙DCA Auto-Zeroing Button (For 156B/158B)
˙Peak Hold
˙MIN/MAX HOLD
˙Smart Data Hold
˙Phase rotation indication
˙Flex AC Current
˙High frequency rejection
˙Auto Powet Off
˙CAT.Ⅳ600V / CAT.Ⅲ1000V Safety Standard

4
150B Series / EN
Unpacking and Inspection
Upon removing your new Power Clamp Meter from its packing,
you should have the following items:
1. Power Clamp Meter
2. Test leads. set (1 x Black, 1 x Red)
3. Temperature Probe (For 158B)
4. User Manual
5. Carrying case
6. Battery
The Meter Description
Press 2 sec

5
150B Series / EN
Power On / Off
Power on
Auto Power Off
After idle 15 min
The meter can work again by turning it on from the OFF
position.
After turning on the meter,
the LCD will show Full,
half, and low to indicate
the battery capacity.

6
150B Series / EN
Auto Power Off (APO) disable :
Press OK button while tuning meter on from OFF position.
Push Buttons
Bluetooth
UP/DOWN
LEFT RIGHT
Menu Operation
Example
Use arrow keys to move the blinking cursor to the
target icon, and then press OK button
Use arrow keys to move the blinking cursor to the
target icon, and then press OK button for more
than 2 seconds.
The icon without underline means the function is
not executed.
The icon with underline means the function is
executed.

7
150B Series / EN
Making Basic Measurements
Preparation and Caution Before Measurement
: Observe the rules of Warnings and Cautions
The figures on the following pages show how to make
basic measurements.
When connecting the test leads to the DUT (Device Under Test),
connect the common test lead before connecting the live lead.
When removing the test leads, remove the test live lead before
removing the common test lead.
Measuring Voltage
V

8
150B Series / EN
Warning
To avoid electrical shock, hazard or damage to meter, do not
attempt to measurement that might exceed 1000 V dc or ac
RMS. Do not apply more then 1000 V dc or ac RMS between
the common input terminal and earth ground.
Note - If the measured voltage is greater than 30 V dc or ac
RMS, the display will show the " " symbol.
Measuring Current
- DO NOT clamp on any conductor while the meter power on.
- 155B/157B has only AC current measurement mode.
- Torch lightening when clamping.
I
OK
I+(-I)=0
OK
I
I
I
OK
I
CAT.Ⅳ.600V
CAT.Ⅲ.1000V
with respect to
earth for the jaw.
Tactile Barrier for
hand guard.
Do not hold
the meter across
the Tactile Barrier.

9
150B Series / EN
AUTO SENSE mode :
Display measurement result at AC only with RMS value or
DC value, it depends on whichever is greater.
AC mode : AC only with RMS value.
DC mode : DC value.
AC+DC mode : AC+DC RMS value.
Note
- Press MODE button to enter the AC/DC/AC+DC mode.
- Press MODE button for more than 2 seconds to return to the
AUTO SENSE mode.
PEAK HOLD (AC mode only)
ACV mode
>2SEC
>2SEC

10
150B Series / EN
ACA mode
>2SEC
>2SEC >2SEC
In PEAK HOLD mode, the meter is activated to save the
positive peak value and negative peak value. Positive peak value
is displayed in PEAK MAX mode. Negative peak value is
displayed in PEAK MIN mode.
Inrush current
If the under testing Inrush current could be bigger than 100 A ac,
please select the range to 600 A/1000 A in advance before
activating inrush current.
: (AC mode only)
After Tigger
Watting Tigger

11
150B Series / EN
DCA ZERO (For 156B/158B)
Remove the jaw out of the conductor.
Press HOLD Key ＞2 Sec to compensate the residual
magnetism.
- DCA Zero is only available in Auto Sense, DC and AC+DC
mode.
Measuring Frequency (AC mode only)
Select the "Hz" indicator then press the OK button to
enter/exit the frequency measurement mode.
> 2 Sec
"Hz"

12
150B Series / EN
MAX/MIN/AVG
The MAX/MIN/AVG mode records the minimum and maximum
input values. When the inputs go below the record minimum
value or above the record maximum value, the meter records
the new value. The MAX/MIN/AVG mode can also calculate
the average of reading.
NOTE :
- Press HOLD key in MAX MIN mode to make the meter stop
updating the maximum and minimum value. When the HOLD
mode is rested in MAX MIN mode, the HOLD mode must be
released before the MAX MIN mode.
MMA >2sec
"MMA"
"MMA"
"MMA"
"MMA"

13
150B Series / EN
Harmonic Measurement
(AC mode only)
THD-F=RMS of Harmonics ÷ RMS of fundamental ×100%.
(harmonics up to the 25 th )
Hn=RMS of Individual Harmonic ÷ RMS of fundamental ×100%.
Press RANGE button to display harmonic order or the value
of the harmonic(unit : %).
" "
the value of h01
the value of h25
HFR (AC mode only)
Select the "HFR" indicator then press the OK button to
eliminate high frequency noise.

14
150B Series / EN
"HFR"
600V
+L
-N
600A
NOTE :
Peak Hold, Inrush, HZ, Harmonic and HFR mode are only
available in AC mode.
Measuring Active power(W)/Power factor(PF)
1.Single Phase Power Measurement
Step1. Set the rotary switch to the "W" position.
Step2. Connect the Red test lead to the L, and the Black test
lead to the N.
Step3. Press the trigger to open the transformer jaws and clamp
one conductor only, make sure that the jaw is firmly
closed around the conductor.
Step4. Use the MODE button to select the "ACW/DCW/PF"
mode.

15
150B Series / EN
NOTE :
-In AutoSense mode, the meter will displays ACW/DCW
if the AC frequency been detected.
- 155B/157B offer AC power measurement mode only.
Active power sign :
(The current direction must the same as the figure.)
No sign : Indicates the power flows from the power source to
the load.
"_" sign : Indicates the power flows from the load to the
power source.
Power factor sign :
No sign : The phase of the current signal is lagging behind
the voltage signal (inductive load).
"_" sign : The phase of the current signal is leading the
voltage signal (capacitive load).
Overrange display :
OL.U : Voltage overload
OL.A : Current overload
± OL kW : Active Power > 1050 kW or < -1050 kW.
2.Three Phase Power Measurement
a. 3-phase 3 wire balanced / unbalanced
Step1. Set the rotary switch to the "W" position
Step2. Using the MODE button to choose the ACW mode.
Black
Red
Black Red
3
W=W1+W2
1
2
Load

16
150B Series / EN
b. 3-phase 4 wire balanced / unbalanced
Step1. Set the rotary switch to the "W" position
Step2. Using the MODE button to choose the ACW mode .
W=W1+W2+W3
Red
N
RedBlack
RedBlack
Black
Load
1
2
3

17
150B Series / EN
Phase Rotation
Line 2
Line 3
Line 1
NOTE :
- Connect the supposed three phase of power source as shown
above.
- The test is only available while the system frequency is stable.
Step 1. Set the rotary switch to the "W" position.
Step 2. Using the MODE button to choose the "RST" mode
Step 3. Connect the Red test lead to the supposed phase
Line 1, and the Black test lead to the supposed phase
Line 3.
a. If volt > 1050V, it will display “OLU” and flash. If volt <30 V,
it will display “LoU”
b. If the frequency > 65 Hz or < 45 Hz, it will display “outF”
and flash.
c. If it is normal, then it will display “L1” and flash for about
3 secconds.

18
150B Series / EN
Step 4. If it displays “L2”, then BUZZER will be sound for twice.
Please switch the Red test lead to connect to the
supposed phase Line 2 immediately before the “ L2 ”
is disappeared.
Step 5. When “L2” is disappears, it will display the testing
result.
a. If it displays “ 1 2 3 “, then the phase sequence is forward
sequence, which means the supposed phase Line 1 is
ahead of the supposed phase Line 2.
b. If it displays “ 3 2 1 ”, then the phase sequence is reversed
sequence, which means the supposed phase Line 2 is
ahead of the supposed phase Line 1.
c. ”----” means that the meter is unable to determine the
results.
d. If it displays “LoU”, it is possible that you remove the test
leads before completing the whole testing procedures.
Step 6 : To repeat the test, press the OK button again.

19
150B Series / EN
OHM Measurment
CAUTION
To avoid possible damage to the meter or to the equipment
under test, disconnect circuit power and discharge all high -
voltage capacitors before measuring resistance and diode.
Note :
- Press MODE button to enter the "Ω", """ or "$" mode.
- Press MODE button for more than 2seconds to return to the
AUTO SENSE mode.
- The red LED will turn on, if the resistance of DUT is < 30Ω.
- Under diode mode, LCD displays "bad" when measuring
a diode conducted at forward and reverse bias.