Calibrator RS350

RS350 calibrator with tablet

The portable reference standard and calibrator RS350 is especially designed for the needs of metering engineers for on-site testing with high precision.
The equipment offers highest functionality together with excellent menu guided operation through a 8” Tablet PC. 

It’s the perfect instrument to reduce technical- and non-technical losses.

What can I do with this instrument?
The RS350 can perform error measurement for maximum 3 meters at time. The last five individual errors are shown on the tablet together with average error and standard deviation. The instrument can also detect the meter constant, if the meter is not proper marked. The tablet gives full information for the testing time, remaining time and shows a progress bar. Instrument transformer ratios can be easy applied.
RS350 error measurement
RS350 error measurement
Accuracy Tests for Energy Meters
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The RS350 has an internal database for all saved data. The pdf-reports are generated from the database.
Individually imported and exported for synchronisation can be:

  • customer information
  • meter types
  • site information
  • meter test workflows

All test data can be uploaded to a common PC database working under our Electric Measurement Studio platform (EMS5).

RS350 database
RS350 database

Database

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The RS350 can check demand registers over a defined time.

Demand Testing

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The RS350 can perform the analysis for harmonic in voltage & current circuits up to 63rd order. All harmonics are displayed simultaneously on one screen in graphical or table format.
All 6 channels can be stored together.
It’s possible to select the harmonics in percent of the fundamental wave or as total RMS value.

RS350 harmonics
RS350 harmonics

Power harmonics are displayed by phase. Shown is the active, reactive- and apparent content.
RS350 power harmonics
RS350 power harmonics

Harmonics Analysis

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The RS350 can perform instrument transformer tests. Current transformers can be tested for ratio, phase displacement and burden.
Voltage transformers can be tested for burden.

RS350 CT error
RS350 CT error

RS350 CT burden
RS350 CT burden

RS350 PT burden
RS350 PT burden

Instrument Transformer Testing

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The RS350 can record all basic measurement values in cyclic time intervals. The intervals can be set between 1 to 99 seconds. The tablet can store 36,000 records (10 hours with 1 second interval time).

RS350 long time measurement
RS350 long time measurement

RS350 long time measurement settings
RS350 long time measurement settings

The results are displayed in graphical format.
RS350 LTM graph
RS350 LTM graph

Long Time Measurement

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The workflow for the meter tester can be defined by the utility. It allows to create systematic meter test sequences. Once the structure is defined, all meter testers will report with the same testing content and nothing will be forgotten. The RS350 guides the user trough all test steps.
The test sequence can include:

  • recording site data
  • verification of proper sealing
  • taking of photos
  • accuracy tests
  • record of the GPS location
  • Signature of witness
  • Report generation

RS350 workflow
RS350 workflow

Meter Testing Workflow

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The RS350 real time measurement display shows all 51 electrically relevant parameters on one screen.
The instrument shows THD & Crest Factor for each phase in voltage & current. It has an easy application of Instrument transformer (IT) ratios for comparison purpose.
Supported are many measurement modes, e.g. 1Ph 2W, 3Ph 3W, 3Ph 4W, in active, reactive & apparent mode, (total & fundamental).
The Apparent power definition is switchable between arithmetical- or trigonometric calculation.

real time measurement
RS350, real time measurement

Real Time Measurement

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The RS350 can test energy registers.

Register Test

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The automatic site analysis function of the RS350 checks the essential parameters versus predefined limits and makes wiring checks for the meter tester easier.
Indicated with PASS/FAIL information are:

  • Presence of voltages & currents
  • Direction of currents
  • Balancing of phase voltages & currents
  • Phase symmetry
  • Phase sequence of voltage & current circuits
  • THD in voltage & current circuits

RS350 site analysis
RS350 site analysis

The limits can be set as per utility rules and regulations.

RS350 wiring check limits
RS350 wiring check limits

Site Analysis

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The RS350 can flexible selected display the actual voltage- and current waveforms for maximum 6 channels in parallel.
Per phase it can show the waveforms of active- and reactive power.
All waves can be saved. To capture suspicious events the RS350 has a HOLD function.

RS350 waveform analysis

Waveform Analysis

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The RS350 helps to debug complex wiring problems.

  • Vectorial display along with relevant electrical parameters
  • Automatic hints on the actual wiring status
  • Supports both vectorial presentations (U & I based)
  • Power quadrant display (per phase & total)

wiring check
RS350 wiring check

Wiring Check

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The calibrator RS350 has a integrated wiring simulator. The simulator can be used for analysis and for training purpose. It can either read the actual values or simulation values.
It’s written in HTML/Javascript and supports most browsers. Take a look here.

RS350 wiring simulation
RS350 wiring simulation

Wiring Simulator

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Specifications

Specifications RS350

Mains and environment

Voltage:


60 V – 265 V AC

Frequency:

47 Hz – 63 Hz

Power consumption:


< 30 VA

Operating temperature:

-5 °C – 50 °C

Max. relative humidity:

≤ 85 %, not condensate

Surge voltage protection:

class C

Installation category:

III

Pollution degree:

2

Ingress protection

IP 30

Housing material

Polycarbonate

Weight:

< 3 kg

Dimensions

268 mm x 243 mm x 68 mm

Measurement parameters

Test voltages, phase-neutral

0.5 V – 576 V

Voltage ranges

60 V, 120 V, 240 V, 480 V, auto range

Test current, direct connected

1 mA – 24 A

Current ranges

20 mA, 50 mA, 100 mA, 200 mA, 500 mA,
1 A, 2 A, 5 A, 10 A, 20 A,
auto-range

Frequency range, fundamental wave

15 Hz – 70 Hz

Bandwidth

4 kHz

Voltage measurement accuracy

< 0.01 %

Voltage measurement drift

< 35 ppm/year

Current measurement accuracy < 25 mA

< 0.02 %

Current measurement accuracy ≥ 25 mA

< 0.01 %

Current measurement drift

< 65 ppm/year

Power measurement accuracy P, Q, S
(related to apparent power)

< 0.05 % (current ≥ 25 mA and λ = 1)

Power measurement drift

< 100 ppm

Phase angle

< 0.01° (current ≥ 25 mA and voltage > 30 V)

Frequency

0.005 Hz

Voltage temperature drift

< 2,5 ppm/K

Current temperature drift

< 5 ppm/K

Power temperature drift

< 7.5 ppm/K

Accessories

Standard accessories

The content of delivery for the calibrator RS350 includes:
10 pcs laboratory cable
4 pcs crocodile clips
10 pcs connector with cable lug
10 pcs adapter with 4 mm pin
10 pcs connector with pin
1 mains power supply cable
10 fuses

Cables and Connectors

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The calibrator RS350 has it’s own compartment inside of the transport case. The tablet is for transport safely stored in the case flap.
The actual tablet is a Lenovo TB3-850F. It has 1 GB RAM and 16 GB internal storage. Operation with battery is up to 8 hours.


RS350 case topview
RS350 case topview

Calibrator and Tablet

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The content of delivery for the calibrator RS350 includes 3 pcs. clamp-on CTs. The CLOU clamp-on CT is designed to perform measurements up to 100 A + 20 %. The CT is rated for 600 V ac circuits of Measurement Category III, Pollution Degree 2, per EN/IEC 61010-1 and EN/IEC 61010-2-032.

Specifications
The accuracy classes are related to apparent power. The given accuracy classes are including the internal RS350 error.

Range current Accuracy class
100 A 24 A ≤ 120 A 0.2
20 A 6 A < 24 A 0.2
5 A 1.2 A < 6 A 0.2
1 A 0.24 A < 1.2 A 0.3
0.2 A 0.05 A < 0.24 A 0.5

Mechanical parameters
Can be uses for wiring diameters up to ⌀ 20 mm
Max. Jaw opening 20 mm
Dimensions 53 mm x 138 mm x 28 mm
Weight 350 g
Material PC + ABS + Polycarbonate, UL94 V0

Electrical parameters
Primary current 10 mA – 120 A AC
Max. continuous input current 120 A
Ratio 1200 : 1
Load capacity ≤ 4 Ω
Over voltage category CAT III 600 V
Frequency range 40 Hz – 3800 Hz
Dielectric strength 3 kV 50 Hz / 60 Hz for 1 minute
Temperature range -20 °C – +55 °C
Output 2.0 meter cable with connector for RS350
Max. voltage not insulated conductors 600 V
Compliant with Standards EN/IEC 61010-1, EN/IEC 61010-2-032, IEC60044-1

Clamp-On Current Transformers 100A

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The documentation for the calibrator RS350 includes:

  • user manual
  • calibration certificate
  • warranty card

Documentation

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This cable adapter is used for accuracy verification of the RS350 against a higher accurate standard (e.g. our reference standard CL3115)

pulse cable
pulse cable

Pulse Output Cable

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A wired scanning head belongs to the standard scope of delivery for the RS350. It can detect rotor marks for electromechanical meters and pulse diodes for electronic meters. LEDs with a wave-length of 400 – 1100 nm and with pulse frequencies up to 3 kHz can be detected.
The scanning head is delivered with a fixing device. The clamping width is 10 mm to 180 mm.

Scanning Head TP-17C
Scanning Head TP-17C

Bag for scanning head and small parts
Bag for scanning head and small parts

Scanning head specifications

parameter

value

Wave-length

400 – 1100 nm

max. frequency, unmodulated

> 3 kHz

max. frequency, modulated

> 9 kHz

dark to light change

max. 15 µs

light to dark change

max. 15 µs

uncertainty of switching edge detection

±1 µs

pulse width

min. 0.2 ms

operating voltage

3.3 V – 24 V DC

operating current

≤ 50 mA

scanning distance

0 – 50 mm

output signal, high

≥ 3.0 V

output signal, low

≤ 0.3 V

Housing

Polycarbonate

Color

blue-grey

dimensions

30 mm x 46 mm x 22 mm

weight incl. cable

< 80 g

cable length

2 m

ingress protection

IP 54

operating temperature

-40 °C – +85 °C

relative humidity

> 85 %

Scanning Head

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The equipment is delivered in a trolley with wheels and handle for easy transportation. The trolley is designed in such way that you can leave the RS350 inside and only make the connections to the meter. The cables can remain connected to the RS350 during transport. This saves time and increases the efficiency of use. The suitcase dimensions are 483.5 mm x 474 mm x 237 mm. The weight with standard accessories is less than 12 kg.

Transport case

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Optional accessories

The basic set of the calibrator RS350 includes one scanning head. Sometimes it’s useful to check the accuracy of two or three energy meters in parallel. The hardware is supporting maximum 3 scanning heads.

Scanning head with fixing device
Scanning head with fixing device

The additional scanning heads are delivered with fixing devices.
Please note that the extension box is needed when using more than one scanning head.
The specifications are the same like the original delivered head.

Additional Scanning Head

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The RS350 can measure the current in Neutral together with the phase currents.
For Neutral current measurement an additional current clamp is needed.
The specifications are the same like for the 100 A clamps.

Clamp-on current transformer 100 A Neutral

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The CLOU clamp-on CT is designed to expand the measurement capabilities of CLOU calibrators like RS350 in industrial and power environments to measurements up to 1000 A + 20 %. The CT is rated for 600 V ac circuits of Measurement Category III, Pollution Degree 2, per EN/IEC 61010-1 and EN/IEC 61010-2-032.

clamp-on CT 1000 A
clamp-on CT 1000 A

Specifications
The accuracy classes are related to apparent power. The given accuracy classes are including the internal RS350 error.

Range

current

Accuracy class

1000 A

between 1200 A and 100 A

0.2

100 A

between 100 A and 10 A

0.1

100 A

Between 10 A and 500 mA

0.2


Mechanical parameters

Can be uses for wiring diameters

up to ⌀ 50 mm

Max. Jaw opening

50 mm

Dimensions

103 mm x 220 mm x 28 mm

Weight

550 g

Material

PC + ABS + Polycarbonate, UL94 V0


Electrical parameters

Primary current

0 – 1000 A AC

Max. continuous input current

1200 A

Ratio

2000 : 1

load capacity

≤ 4 Ω

Over voltage category

CAT III 600 V

Frequency range

40 Hz – 3800 Hz

Dielectric strength

3 kV 50 Hz / 60 Hz for 1 minute

Temperature range

-20 °C – +55 °C

Output

2 m cable with connector for RS350

Max. voltage not insulated conductors

600 V

Compliant with Standards

EN/IEC 61010-1, EN/IEC 61010-2-032, IEC60044-1

Clamp-on current transformer 1000 A

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The CLOU clamp-on CT is designed to expand the measurement capabilities of CLOU calibrators like RS350 in industrial and power environments to measurements up to 2000 A + 20 %. The CT is rated for 600 V ac circuits of Measurement Category III, Pollution Degree 2, per EN/IEC 61010-1 and EN/IEC 61010-2-032.

clamp-on CT 2000 A
clamp-on CT 2000 A

Specifications

The accuracy classes are related to apparent power. The given accuracy classes are including the internal RS350 error.

Range current Accuracy class
2000 A between 2400 A and 600 A 0.1
500 A between 600 A and 120 A 0.2
100 A Between 120 A and 24 A 0.3
20 A Between 24 A and 2 A 0.5
Mechanical parameters
Can be uses for wiring diameters up to ⌀ 50 mm
Max. Jaw opening 75 mm
Dimensions 116 mm x 327 mm x 35 mm
Weight 550 g
Material PC + ABS + Polycarbonate, UL94 V0
Electrical parameters
Primary current 0 – 2400 A AC
Max. continuous input current 2400 A
Ratio 4000 : 1
load capacity ≤ 4 Ω
Over voltage category CAT III 600 V
Frequency range 40 Hz – 3800 Hz
Dielectric strength 3 kV 50 Hz / 60 Hz for 1 minute
Temperature range -20 °C – +55 °C
Output 2 m cable with connector for RS350
Max. voltage not insulated conductors 600 V
Compliant with Standards EN/IEC 61010-1, EN/IEC 61010-2-032, IEC60044-1

Clamp-on current transformer 2000 A

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The CLOU clamp-on CT is designed to perform measurements up to 5 A + 20 %. The CT is rated for 600 V ac circuits of Measurement Category III, Pollution Degree 2, per EN/IEC 61010-1 and EN/IEC 61010-2-032.

clamp-on CT 5 A
clamp-on CT 5 A

Specifications

The accuracy classes are related to apparent power. The given accuracy classes are including the internal RS350 error.

Range

current

Accuracy class

5 A

2.4 A ≤ 6 A

0.2

2 A

1.2 A < 2.4 A

0.2

1 A

0.6 A < 1.2 A

0.2

0.5A

0.24 A < 0.6 A

0.2

0.2 A

0.12 A < 0.24 A

0.3

0.1 A

0.05 A < 0.12 A

0.3


Mechanical parameters

Can be uses for wiring diameters

up to ⌀ 8 mm

Max. Jaw opening

10 mm

Dimensions

53 mm x 136 mm x 28 mm

Weight

350 g

Material

PC + ABS + Polycarbonate, UL94 V0


Electrical parameters

Primary current

10 mA – 6 A AC

Max. continuous input current

6 A

Ratio

1000 : 1

Load capacity

≤ 4 Ω

Over voltage category

CAT III 600 V

Frequency range

40 Hz – 3800 Hz

Dielectric strength

3 kV 50 Hz / 60 Hz for 1 minute

Temperature range

-20 °C – +55 °C

Output

2.0 meter cable with connector for RS350

Max. voltage not insulated conductors

600 V

Compliant with Standards

EN/IEC 61010-1, EN/IEC 61010-2-032, IEC60044-1

Clamp-on current transformer 5 A

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The functionality of the RS350 hardware can be extended to use 3 scanning heads in parallel. For this purpose we have an extension box together with a connection cable to the RS350.

Extension box for 3 scanning heads

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This switch is connected to the pulse input socket of the RS350. It is used to test electromechanical meters under low load conditions.
A scanning head needs about 2 full rotations of the meter disk for adjustment. With the Start-Stop switch you can monitor the mark on the disk. When it is in front, you press the button for starting the measurement. Once the mark arrives again at the front, press the button and see the error result.

start - stop switch
start – stop switch

Start-Stop Switch

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wireless scanning head
wireless scanning head

The RS350 can work together with one or more wireless scanning heads TP17. This accessory is helpful to test energy meters in parallel without need of extension cables.
See the detailed description here.

Wireless Scanning Head
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FAQ

Our manual can give only guidance how to use the RS350-Application. For general information of this Android tablet please refer to the original Lenovo instructions.

How is the Lenovo Tablet operated?

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This is only a short reference for most common meters. Make sure that you have read the RS350 operation manual with more examples.
Always follow your company safety guidelines. In addition it’s no mistake to take a look at our safety regulations.

Single phase 2 wire, DIN terminal

Singlephase two wire meter, DIN terminal
Singlephase two wire meter, DIN terminal

Single phase 2 wire, BS- or ANSI bottom connected terminal
single phase 2 wire, BS terminal
single phase 2 wire, BS terminal

Threephase 3 wire, DIN terminal

DIN threephase 3 wire
DIN threephase 3 wire

Threephase 4 wire, DIN terminal

DIN threephase 4 wire, direct connected
DIN threephase 4 wire, direct connected

Threephase 4 wire CT, DIN terminal

DIN threephase 4 wire CT
DIN threephase 4 wire CT

Threephase 4 wire CT/PT, DIN terminal

DIN threephase 4 wire CT/PT
DIN threephase 4 wire CT/PT

How to connect the RS350 to different meter types?

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The calibrator RS350 communicates with the Android device (usually the delivered tablet) via Bluetooth. If it’s necessary to pair this two devices new, go to SETTINGS (RS350 application) and select Bluetooth.

RS350 Bluetooth
RS350 Bluetooth

Click on Refresh and select RS350-xxxxxx
The number xxxxxx is matching with the last 6 digits of the RS350 serial no. indicated on the type-label.
The device will show Connected and device battery status as soon as the communication is established.

How to pair the calibrator with the tablet?

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The calibrators RS350 are leaving our factory with a traceable calibration certificate.
All metrological instruments need to be recalibrated regular. The recalibration period depends on country regulations. In most countries portable calibrators have a recalibration period of one year.
The recalibration can be done in any for this purpose accredited laboratory.
The general principle is to compare the calibrator pulses with the reference standard pulses. Connect the P-OUT to the pulse input and GND to the ground, calculate the meter constant for the actual load and verify the RS350 accuracy with the higher accurate standard.

RS350 meter constants
RS350 meter constants

How to recalibrate the RS350?

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Contact Us

Would you like to receive a quotation or to talk to our wonderful sales team? Please enter your email, so we can follow up with you.

Downloads

Specifications in Word-Format

can be used for comparison or tender purpose

Size: 1.2 MB, doc-file
Brochure RS350

Highlights of the portable calibrator RS350.

Size: 12 MB, pdf-file

Training

We are also offering theoretical- and practical training, either in our headquarter in Shenzhen or at customer site.

Calibrator RS350
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Published by

Lao Ren

more than 30 years experience in energy metering Product Director Shenzhen CLOU Electronics

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