Portable Calibrator RS350

RS350

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?

Accuracy Tests for Energy Meters

RS350 accuracy
accuracy test screen

The RS350 can perform error measurement for maximum 3 energy 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.

doing five accuracy tests in 27 seconds

Energy Register Tests

Energy Register Test
test of active, reactive and apparent registers in parallel

Register tests are necessary to verify that the energy supplied to the meter is matching with the internal register or counter. The RS350 can perform this tests on site.

Demand Register Tests

Demand Register Test
Demand Testing over 3 minutes

The RS350 can check demand registers over a defined time for up to 3 meters in parallel.

Instrument Transformer Testing

RS350 CT Error
error test for current transformers

The RS350 can perform various instrument transformer tests. Current transformers can be tested for ratio, phase displacement and burden.
Follow the link to find more information about instrument transformer burden testing with the calibrator RS350.

Current transformer burden measurement

Real Time Measurement

RS350 Real Time Parameters
display of all available parameters

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.

Long Time Measurement

RS350 long time measurement
long time measurement, graph view for reactive power

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). The results can be displayed in table- or graphical format. It's also possible to export the data to a comma separated values file (CSV).
The record interval and integration time can be controlled by a start/stop timer.

Waveform Analysis

RS350 waveform analysis
Waveforms for voltages and currents

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

Harmonics Analysis

RS350 harmonics
harmonics graph for phase L2

The RS350 can perform the analysis for harmonic content 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.
Power harmonics are displayed by phase.

Wiring Check

RS350 wiring check
wiring check

The RS350 helps you to debug complex wiring problems.

Site Analysis

RS350 site analysis
site analysis

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

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

Wiring Simulator

RS350 wiring simulator
Wiring Simulator

The calibrator RS350 has an integrated wiring simulator. The simulator can be used for analysis and for training purpose. It can either read the actual values or simulation values.

You can run a simulation in the screen below. If the monitor size is too small, use the scroll bars. The grey circles are touch sensitive.

Meter Testing Workflow

RS350 meter testing workflow
workflow procedure, here: check the seals

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

You can share the reports by email, Whatsapp, Wechat or to whatever service is available on your tablet/phone.

Database

RS350 database
RS350 database

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).

Product Details

Specifications

Mains and environment
Voltage: 60 V to 265 V AC
Frequency: 47 Hz to 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 to 576 V
Voltage ranges 60 V, 120 V, 240 V, 480 V, auto range
Test current, direct connected 1 mA to 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 to 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

Content of Delivery

Calibrator and Tab

RS350

Reference Standard and Tablet PC
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.

Transport Case

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.

RS350 case front view open
RS350 case front view open
RS350 case back
RS350 case back
RS350 case topview
RS350 case topview
RS350 case front
RS350 case front

Scanning Head

Scanning Head TP-17C
Scanning Head TP-17C with fixing device
transport bad for scanning head and small parts
transport bag for scanning head and small parts
Scanning head specifications
parameter value
Wave-length 400 to 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 to 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 IP54
operating temperature -40 °C – +85 °C
relative humidity > 85 %

Cables and Connectors

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

4mm adapter
4mm adapter
pin connector
pin connector
cable set
cable set
long flexible pins
long flexible pins
crocodile clips
crocodile clips
lug connector
lug connector

Clamp-On CTs, 120 A

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.

Clamp-on CTs, 120 A
Clamp-on CTs, 120 A
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 to 24 A 0.2
5 A 1.2 A to 6 A 0.2
1 A 0.24 A to 1.2 A 0.3
0.2 A 0.05 A to 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, UL 94 V0

Electrical parameters  
Primary current 10 mA to 120 A AC
Max. continuous input current 120 A
Ratio 1200 : 1
Load capacity ≤ 4 Ω
Overvoltage category CAT III 600 V
Frequency range 40 Hz to 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, IEC 60044-1

Pulse Output Cable

pulse output cable
pulse output cable

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

Documentation

The documentation for the calibrator RS350 includes:

  • user manual
  • company calibration certificate
  • warranty card

3rd party calibration certificates can be provided at additional cost.

Optional accessories

Clamp-On CTs, 5 A

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

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.

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, IEC 60044-1

Clamp-On CTs, 1000 A

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

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.

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, UL 94 V0

Electrical parameters  
Primary current 0 to 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 to 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, IEC 60044-1

Clamp-On CTs, 2000 A

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

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.

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, UL 94 V0
Electrical parameters
Primary current 0 to 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 to 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, IEC 60044-1

Clamp-On CT, 100 A, neutral

Clamp-on CT for neutral, 120 A

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 as for the 100 A clamps.

Extension Box for 3 Scanning Heads

extension box for 3 scanning heads
extension box for 3 scanning heads

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

Pulse Input Cable

Pulse input cable
Pulse input cable

This cable adapter is also used for accuracy verification and communication connection of the RS350 against energy meters that have only pulse terminals without pulse lights.
The meters can't be tested via optical head, therefore the cable is used.
The plug end of the cable connects to the RS350 pulse port, with its clamp Pin1 connecting to meter pulse positive electrode and clamp GND to meter pulse negative electrode.

Additional Scanning Head

scanning head with fixing device

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.
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 as for the original delivered head.

Wireless Scanning Head

wireless scanning head
wireless scanning head

This scanning head can be used for detection of metrological LED pulse outputs for static electronic meters together with CLOU portable meter test equipment RS350.
The TP-17 Wireless scanning head is based on the Nordic nRF24L01+, highly integrated, ultra low power (ULP) 2 Mbps RF transceiver for the 2.4 GHz ISM (Industrial, Scientific and Medical) band. It includes the Enhanced ShockBurst™ hardware protocol accelerator for a high-speed SPI interface. The no. of TP-17 Wireless scanning heads working in parallel is not limited.

The scanning system consists of

  • Scanning head TP-17 wireless 2.4 GHz transmitter, fixed at the energy meter
  • Fixing device TP-GS 2
    – fastening to meter by two side-plates, can be moved up and down along the meter
    – can be used for rectangle- or round meters
    – adjustable width from 35 mm to 180 mm
    – provides magnetic adhesion to scanning probes
    – provides mechanical adhesion to scanning probes
    – probes can be moved left/right freely
    – made of insulation material, which ensures safety and portability
  • Receiver TP-17 wireless
  • USB charging cable for scanning head
  • Pairing cable
  • Transport bag

The scanning head TP17-wireless is designed and manufactured in conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA). The compliance was verified by MicroTest (external type test laboratory).

Specifications scanning head TP-17 Wireless
wavelength 400 to 1100 nm
max. sampling frequency 3 kHz
uncertainty of switching edge detection ± 1 μs
pulse width ≥ 0.2 ms
operating voltage 3.3 V DC
scanning distance 10 to 100 mm
housing hard plastic
color blue-grey
dimensions 55 mm x 30 mm x 38 mm
weight < 90 g
transmission power 0 dBm ≙ 1 mW
transmission range, outdoor max. 40 m
transmission range, indoor, industrial environment 25 m (one wall)
battery capacity 800 mAh
permanent operation, battery full charged 72 h
battery charging USB adapter cable
ingress protection IP54
operating temperature: -40 °C to +85 °C
relative humidity: > 85 %
Specifications receiver for scanning head TP-17 Wireless
operating voltage 3.3 V to 5 V DC
operating current ≤ 30 mA
output signal, high ≥ 4.5 V
output signal, low ≤ 0.3 V

Start/Stop Switch

start/stop switch
start/stop switch

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.

Frequently Asked questions

What are the constants of the RS350?

RS350 power constants
60 V 120 V 240 V 480 V
0.02 A 5 x 1010 2.5 x 1010 1.25 x 1010 6.25 x 109
0.05 A 2 x 1010 1x 1010 5 x 109 2.5 x 109
0.1 A 1 x 1010 5 x 109 2.5 x 109 1.25 x 109
0.2 A 5 x 109 2.5 x 109 1.25 x 109 6.25 x 108
0.5 A 2 x 109 1 x 109 5 x 108 2.5 x 108
1 A 1 x 109 5 x 108 2.5 x 108 1.25 x 108
2 A 5 x 108 2.5 x 108 1.25 x 108 6.25 x 107
5 A 2 x 108 1 x 108 5 x 107 2.5 x 107
10 A 1 x 108 5 x 107 2.5 x 107 1.25 x 107
20 A 5 x 107 2.5 x 107 1.25 x 107 6.25 x 106
The table refers to the automatic settings. It's valid for 3 wire- and 4 wire measuring mode.

The output frequency for end of range in voltage/current pair with three phase connection is 50 kHz. The power pulses are on TTL/CMOS level. The burden capacity is > 20 mA.

Calculation formulas

Frequency

frequency calculation
f = frequency
UR = voltage range
IR = current range
c = reference meter constant

Constant

constant calculation

Where can I download the specifications?

We can send you the full list of specifications for tender purpose on request.

Do you have a demo video for meter test?

Lixin is doing a meter test

Do you provide training?

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



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