RS PRO RS 155B, RS 156B, RS 157B, RS 158B Instruction 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

E

Application 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.Ⅳ 600V / CAT.Ⅲ 1000V 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.

20

150B Series / EN

Measuring Capacitance

Set the rotary switch to the " %" position.

Capcitance

 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 capacitance. Use the DC voltage
function to confirm that the capacitor discharged.

Note - The meter will display “diSC” while discharging the
capacitor.

21

150B Series / EN

Measuring Current with Flex Clamp Meter

Set the rotary switch to the " " position.

Keep the range of Flex Clamp meter which has 3000A/3V

output ratio.

Note : Please follow the above illustrated instruction and

measure a known current to make sure that the
connection between two meters is correct.

22

150B Series / EN

Measuring Temperature °C / °F ( For 158B )

Set the rotary switch to the " " position.

Don’t take any high voltage measurement prior to accurate
°C/°F measurements.

23

150B Series / EN

Other Function :

AUTO/MANUAL RANGE

HOLD Key

Press HOLD key to freeze display value.

Auto Range mode Manual Range mode

>2SEC

>2SEC

Press
Hold key

SMART HOLD ： The meter will beep continuously and the

display will flash if the measured signal is larger than the
display reading. (for V, A, W, and Flex AC current function)

MEM mode

When measuring, you can save the reading to memory and
load it from memory. The meter can store maximum 1000
data in memory.

To enter MEM mode, use arrow keys to select MEM icon, and
press OK button.
In this mode, you can operate the following options:

24

150B Series / EN

Use Arrow keys to select the following icons.

A-SAVE

(Auto-Save)

You can operate the A-SAVE mode to automati­cally save new reading. When you use the probes
to measure a new reading, the meter will automati­cally save it. In some case, the A-SAVE mode will
not work. For example, the reading is smaller than
the A-SAVE limit or the reading is OL.
Press OK button to enter/exit A-Save mode.
Press RANGE button to display the recorded data
amount /currently measured value.

SAVE

Press OK button to enter SAVE mode.
Press OK button to save a new reading to
memory.
Press RANGE button to display the recorded data
amount /currently measured value.
Press OK button for more than 2seconds to exit
the mode.

LOAD

Press OK button to enter/exit LOAD mode.
Press LEFT or RIGHT button to select data.
Press RANGE button to select data index/
recorded value.

CLR

Press OK button to enter CLR mode.
Press OK button to delete all data in memory.
Press OK button for more than 2seconds to exit
this mode.

MMA

(MAX/MIN)

MMA mode is only valid when A-Save mode has
executed and finished.
Press OK button to enter MMA mode.
Press OK button to display the maximum/
minimum value .
Press OK button for more than 2seconds to exit
this mode.

To exit MEM mode, use arrow keys to select MEM icon and
press OK button.

A-Save limit.

Function Limit

V, A, W, Flex A, Cap 5% of range

Hz

10% of 100Hz range
5% of 1k/10k Hz range

25

150B Series / EN

LOG mode

You can record a lot of reading to memory in a long time, then
analyze and plot graph.
The meter can store a maximum 9999 data in memory.
The record rate can be set from 1 sec to 600 sec. The error of
timer is less than 3 seconds per hour.
To enter LOG mode, use Arrow keys to select LOG icon, and
press OK button to enter.
In this mode, you can operate the following options :

Use Arrow keys to select the following icons.

SAVE

Press OK button to start data logger. The logger
automatically records at regular intervals.
To stop data logger, press OK button to return.

LOAD

Press OK button to review data from memory.
Press LEFT or RIGHT button to select data.
Press RANGE button to select data index/recorded
value.
Press OK button to return.

RATE

Press OK button to setup the record rate of logger.
Press LEFT or RIGHT button to select rate.
Press OK button to return.

To exit LOG mode, select LOG icon, and press OK button.

Bluetooth

The meter uses low-power Bluetooth v4.0 wireless technology
to transfer the real-time data. You can use the RF communica­tion to link to android or apple devices.
The RF communication range : Open air up to 10 m.
This function is invalid for INRUSH / Phase Rotation.

26

150B Series / EN

VoltSeek :

The red diamond shape of LED will Illuminate, if an electric
field been detected form the jaw.

Note - This function is invaild for OHM, Capacitance, INRUSH,
and Phase Rotation.



Caution

The light indicator turns on while the
clamp tips are close to an electric field.
If no indication, voltage could still be
present.

Buzzer

The meter beeps once for every valid key-press, and beeps
twice for every invalid key-press.

Power-up options:

Press one of the following buttons while tuning meter on from
OFF position.

UP/DOWN button : Display of the software version.
OK button : Disable auto power off. The display shows “AoFF”.
LEFT button : Disable active backlight. The display shows “LoFF”.
HOLD BUTTON : Display all LCD symbols approx 10 seconds.

27

150B Series / EN

Battery State display

User can know the battery state from the battery indicator.

Batter State Description

The battery is full charged

The battery is remained 2/3 power

The battery is remained 1/3 power

Replace the battery as soon as the low battery
indicator blinks to avoid inaccurate reading

Battery Replacement

HCaution

Remove test leads from meter before opening the battery
cover or meter case.

28

150B Series / EN

Specifications

General Specifications

Overload protection : 1000 V

rms

600 A

rms

For 155B/156B

1000 A

rms

For 157B/158B

Display count : 10000 or 4000
Measuring rate : 3 times / sec.
Overrange display : “OL” or “-OL” .
Auto Power Off : Approx 15 minutes.
Power requirement : 6×1.5 V AAA alkaline batteries.
Battery life : 50 hours (without backlight).
Dimensions :

103 mm(W) x 243 mm(L) x 55 mm(D) for 155B/156B
103 mm(W) x 258 mm(L) x 55 mm(D) for 157B/158B
Weight : approx. 540g (with battery) for 155B/156B
approx. 600g (with battery) for 157B/158B

Environmental Conditions

Indoor Use.
Calibration : One year calibration cycle.
Operating temperature :

0°C ~ 10°C
10°C ~ 30°C (≦80% RH)
30°C ~ 40°C (≦75% RH)
40°C ~ 50°C (≦45%RH)
Storage temperature : -10 to 50°C
0 to 80% RH (batteries not fitted).

Temperature coefficient :

0.2 x (Specified accuracy) / °C, < 18°C, > 28°C .
Over voltage category :
IEC 61010-1 CAT.Ⅳ. 600V, CAT.Ⅲ. 1000V
IEC 61010-2-032, IEC 61010-2-033

CAT Application field

Ⅱ

The circuits directly connected to Low-voltage installation.

Ⅲ

The building installation.

Ⅳ

The source of the Low-voltage installation.

Operating altitude : 2000m (6562 ft)
Conductor Size : 33 mm diameter (for 155B/156B)

40 mm diameter (for 157B/158B)
Pollution degree : 2

29

150B Series / EN

Electrical Specifications

Accuracy is ±(% reading + number of digits) at 23°C ± 5°C
< 80%RH. Accuracy is specified for a period of one year after

calibration.

(1) Voltage

Function Range Accuracy*

DCV

99.99 V
± (0.7% + 2 dgt)

999.9 V

ACV

99.99 V
± (1.0% + 5 dgt)

50 – 500 Hz

999.9 V

HFR
ACV

99.99 V

50 – 60 Hz ± (1% + 5 dgt)

>60 – 400 Hz ± (5% + 5 dgt)

999.9 V

* DCV <1000 dgt, add 6 dgt to the accuracy.

ACV <1000 dgt, add 3 dgt to the accuracy.

Input Impedance : 3.5MΩ // <100pF

AC Conversion Type : AC Conversions are ac-coupled, true

RMS responding, calibrated to the RMS value of a sine wave

input. Accuracies are given for sine wave at full scale and non-

sine wave below half scale. For non-sine wave (50/60Hz) add

the following Crest Factor corrections:

For Crest Factor of 1.4 to 2.0, add 1.0% to accuracy.

For Crest Factor of 2.0 to 2.5, add 2.5% to accuracy.

For Crest Factor of 2.5 to 3.0, add 4.0% to accuracy.

CF 3 @ 460 V, 460 A (for 157B/158B),280 A(for 155B/156B)

2 @ 690 V, 690 A (for 157B/158B),420 A(for 155B/156B)

AC+DC Vrms Accuracy : same as ACV spec. +DCV spec.

EMC : EN 61326-1
Shock Vibration: Per MIL-PRF-28800F for a Class 2 instrument.
Drop Protection : 4 ft. drop to hardwood on concrete floor.

30

150B Series / EN

(2) Current

* 156B : 599.9 A ; 158B : 999.9 A
** The measured value <1000 dgt, add 5 dgt to the accuracy.
Position Error : ±1% of reading.
AC Conversion Type and additional accuracy is same as AC
Voltage.

AC+DC Arms Accuracy : Same as ACA spec + DCA spec.

－ For better measurement accuracy of high current and the

constraint of temperature increasing of maximum range
600A/1000A AC, do not measurement more than 10 mins.
and have rest time with 30 mins. at least in between every
measurement (for 155B/157B).

－ DCA affected by the temperature and the residual magnetism.

Press HOLD key > 2 seconds to compensate it.

156B/158B

Function Range Accuracy

DCA

99.99 A ± (1.5% + 0.2 A)

599.9 A/999.9 A* ± (1.5% + 5 dgt) **

ACA

0.10 A – 99.99 A
50 – 60 Hz ± (1.5% + 5 dgt) **

>60 – 400 Hz ± (2% + 5 dgt) **

599.9 A/999.9 A*

HFR
ACA

0.10 A – 99.99 A

50 – 60 Hz ± (1.5% + 5 dgt) **

>60 – 400 Hz ± (5% + 5 dgt) **

599.9 A/999.9 A*

* 155B : 599.9A ; 157B : 999.9A
** The measured value <1000dgt, add 5 dgt to the accuracy.

155B/157B

Function Range Accuracy

ACA

99.99A

50 – 60Hz ± (1.5% + 5dgt) **

>60 – 400Hz ± (2% + 5dgt) **

599.9A/999.9A*

HFR

ACA

0.10A – 99.99A
50 – 60Hz ± (1.5% + 5dgt) **

>60 – 400Hz ± (5% + 5dgt) **

599.9A/999.9A*

31

150B Series / EN

(3) Peak Hold : Peak MAX / Peak MIN

155B/156B

Function Range Accuracy

ACV

140.0 V
± (3.0% + 15 dgt)

1400 V

ACA

140.0 A
± (3.0% + 15 dgt)

850 A

157B/158B

Function Range Accuracy

ACV

140.0 V
± (3.0% + 15 dgt)

1400 V

ACA

140.0 A
± (3.0% + 15 dgt)

1400 A

Accuracy defined for :

Sine wave, ACV>5 V rms / ACA≧5 A rms, Freq.50 – 400 Hz.

－ For square wave, the accuracy is unspecified.

－ Only suitable for the repetitive events.

(4) Frequency

Function Range Accuracy

Frequency

20.00 – 99.99 Hz

± (0.5% + 3 dgt)

20.0 – 999.9 Hz

0.020 – 9.999 KHz

Sensitivity :

10 – 100 Vrms for AC 100 V range
10 – 100 Arms for AC 100 A range ( >400Hz Unspecified)
100 – 1000 Vrms for AC 1000 V range
100 – 600/1000 Arms for AC 600 A/1000 A range
( >400Hz Unspecified)

- Reading will be 0.0 for signals below 10.0 Hz.

32

150B Series / EN

(5) Total Harmonic Distortion :

Function Range Accuracy

ACA /ACV 99.9% ± (3.0% + 10 dgt)

Harmonic distortion measurement :

Harmonic order Range Accuracy

H01 ~ H12

99.9%

± (5% + 10 dgt)

H13 ~ H25 ± (10% + 10 dgt)

－ If ACV<10 V rms or ACA <10 A rms, it will display “rdy”.

－ If the fundamental frequency out of range 45 – 65 Hz, it will

display “out.F”.

(6) Inrush Current :

Function Range Accuracy

ACA

99.99 A

± (2.5% + 0.2 A)

599.9 A /999.9 A * ± (2.5% + 5 dgt)

* 155B/156B : 599.9 A ; 157B/158B : 999.9 A

Accuracy defined for :

Sine wave, Freq. 50/60 Hz

- Integration time about 100m sec
Trigger level of INRUSH : 1 A rms for 100 A range
10 A rms for 600 A/1000 A range

(7)Active Power : Watt (DC/AC)

Function Range Accuracy

ACW / DCW

9.999 kW**

A,error×V,reading +

V,error×A,reading

99.99 kW

599.9 kW/999.9 kW*

* 155B/156B : 599.9 kW ; 157B/158B : 999.9 kW

** The measured value<1.000 kW，add 10 dgt to the accuracy.

33

150B Series / EN

Accuracy defined for :

ACW :
Sine wave , ACV≧ 10 V rms, ACA≧ 5 A rms
Freq. 50 – 60 Hz, PF=1.00
DCW (For 156B/158B only) :
DCV ≧ 10 V , DCA ≧ 5 A

(8) Power Factor

Function Range Accuracy*

PF 1.00 ± 5 dgt

* ACA<100 A, add ± 3 dgt to the accuracy (For 155B/157B)

(9) Resistance & Continuity & Diode :

Function Range Accuracy

Resistance

999.9 Ω

± (1.0% + 5 dgt)

9.999 kΩ

99.99 kΩ

Continuity 999.9 Ω ± (1.0% + 5 dgt)

Diode 0.40~ 0.80 V ± 0.1 V

Max. Test Current : Approx. 0.5 mA.
Maximum Open Circuit Voltage for Ω, ": Approximate 3 V
Maximum Open Circuit Voltage for diode : Approximate ±1.8 V

Continuity Threshold : ＜30Ω Beep On.

＞100Ω Beep OFF.

Continuity Indicator : 2 kHz Tone Buzzer
Continuity response time : < 100 ms.

(10) Capacitance :

Function Range Accuracy

Capacitance

3.999 μF

± (1.9% + 8 dgt)

39.99 μF

399.9 μF

3999 μF

34

150B Series / EN

(11) Flex AC Current (voltage input):

Function Range(1mV/1A) Accuracy*

ACA 300 A/3000 A ±(1%+5 dgt) (50–500 Hz)**

HFR ACA 300 A/3000 A

±(1%+5 dgt) (50–60 Hz)**

±(5%+5 dgt) (61–400 Hz)**

Peak 420 A/4200 A ±(3%+80 dgt) (50–500 Hz)

INRUSH 300 A/3000 A ±(2%+10 dgt) (50/60 Hz)

Frequency 99.99 Hz/999.9 Hz ± (0.5%+3 dgt) (<500 Hz)

THD 99.9% ±(5%+10 dgt)

Harm H01-H12 99.9% ±(5%+10 dgt)

*The accuracy of sFlex-T is not included.
**ACA <300 dgt, add 3 dgt to the accuracy.

－ If ACA <30 A rms, it will display “rdy” in Harmonic mode.

Trigger level of INRUSH : 1% of current range.

(12) Temperature

158B

Function Range Accuracy

°C

-50°C – 399.9°C

± (1% + 3°C)

400°C – 1000°C

°F

-58°F – 751.9°F

± (1% + 6°F)

752°F – 1832°F

－ The above specification is assumed at the ambient tempera-

ture stability within ±1°C. In addition, the temperature probe
has to be connected to meter for more than 1 hour in advance.
The meter needs 2 hour for stability for ambient temperature
change more than ± 5°C.

35

150B Series / EN

Limited Warranty

This meter is warranted to the original purchaser against
defects in material and workmanship for 3 years from the date
of purchase. During this warranty period, RS Components will,
at its option, replace or repair the defective unit, subject to
verification of the defect or malfunction.
This warranty does not cover fuses, disposable batteries, or
damage from abuse, neglect, accident, unauthorized repair,
alteration, contamination, or abnormal conditions of operation or
handling.
Any implied warranties arising out of the sale of this product,
including but not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited to the above. RS
Components shall not be liable for loss of use of the instrument
or other incidental or consequential damages, expenses,
economic loss, or for any claim or claims for such damage.
Some states or countries laws vary, so the above limitations or
exclusions may not apply to you.
For full terms and conditions, refer to the RS website.

Africa
RS Components SA

P.O. Box 12182,
Vorna Valley, 1686
20 Indianapolis Street,
Kyalami Business Park,
Kyalami, Midrand
South Africa

www.rs-components.com

Asia
RS Components Ltd.

Suite 1601, Level 16, Tower 1,
Kowloon Commerce Centre,
51 Kwai Cheong Road,
Kwai Chung, Hong Kong

www.rs-components.com

China
RS Components Ltd.

Suite 23 A-C
East Sea Business Centre
Phase 2
No. 618 Yan'an Eastern Road
Shanghai, 200001
China

www.rs-components.com

Europe
RS Components Ltd.

PO Box 99, Corby,
Northants.
NN17 9RS
United Kingdom

www.rs-components.com

Japan
RS Components Ltd.

West Tower (12th Floor),
Yokohama Business Park,
134 Godocho, Hodogaya,
Yokohama, Kanagawa 240-0005
Japan

www.rs-components.com

U.S.A
Allied Electronics

7151 Jack Newell Blvd. S.
Fort Worth,
Texas 76118
U.S.A.

www.alliedelec.com

South America
RS Componentes Limitada

Av. Pdte. Eduardo Frei M. 6001-71
Centro Empresas El Cortijo
Conchali, Santiago, Chile

www.rs-components.com