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Chauvin Arnoux CA6416 Earth Clamp

Ground measurements in urban areas can be difficult to set up ground stakes. Perform selective measurements on a parallel ground system without disconnecting conductors or setting up stakes

Next Day Delivery (subject to availability)

including VAT @ 20%
Regular Price:
  • Case Supplied
  • Measure Earth Resistance
  • OLED Display
  • 35mm Jaw
  • Ground Loop Resistance
  • Rechargeable Batteries
  • High Accuracy
  • FreeDelivery
  • 30DayMoneyBack
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Chauvin Arnoux CA6416 Earth Clamp

The C.A 6416 earth clamps, delivered in a carrying case, are ideal for quick earth-loop resistance measurements. 600V CAT IV, they display the earth voltage with a dangerous voltage alarm and provide additional safety during measurement.

They are particularly easy to use thanks to ergonomic innovations such as a force compensation system to keep the clamp open without any effort and an OLED display, offering visibility over an angle of 180° whatever the lighting conditions. 

The automatic PRE-HOLD function when the clamp is opened and the automatic jaw calibration function at power-up help to optimize processing of the measurements provided by the clamps.


Chauvin Arnoux C.A 6416 Comes Supplied With:

  • Carrying Case
  • 4 x 1.5 V batteries
  • CD-Rom containing the operating manual in 5 languages

Key Features:

Simultaneous display of:

  • The impedance and leakage current (Ω+A), 
  • The earth voltage, 
  • The breakdown of the resistive and inductive parts of the ground impedance, 

Also allows user to display the impedance transposed to a frequency close to the network frequency, thus reducing measurement errors when low values are involved.

  • Additional specifications:
  • Large measurement range: 1,500 Ω / 500 µH / 40A 
  • Alarms on Ω, A and V
  • Automatic Pre-Hold mode when the clamp is opened
  • 300 storage locations
  • Real-time clock for time/date-stamping of measurements 
  • Automatic calibration of jaw opening distance at start-up
  • Buzzer and automatic power-off


Typical Applications:

Measurement of grounds in parallel on MV/LV installations

To ensure the quality of the ground present on the whole distribution network, an extended ground is set up using all the local grounds in parallel: grounds of electricity poles, building grounds, etc.

Ground measurements in urban areas and/or on buildings with Faraday cages.

On buildings in urban areas where the grounding system comprises numerous ground connections in parallel and in buildings equipped with sensitive electronic equipment, a network of ground conductors connected to multiple grounds helps to equalize the potential of the chassis-grounds, particularly in the event of storms.

Measurements on telecommunications lines

To protect their line from disturbances, the telecommunications line provider isolates the cable by means of a conducting sheath connected to the ground over its whole length. Indeed, under the influence of external electromagnetic fields, telecommunication cables, which comprise several conductors, are subject to a stray current which disturbs the devices connected. This current, called the common mode, often drains to ground.

Measurements in the rail sector

Railways are particularly well protected against lightning and voltage surges. The poles bearing the catenary, the rails and sometimes even the fences are connected to the ground. In addition, to obtain a lower ground resistance, the poles, rails and fences are interconnected to create a network of multiple grounds set up in parallel.

Ground measurement on buried or surface pipelines

The ground connection of the pipeline is checked with a ground clamp by ground-loop and low- current or leakage-current measurements. In the case of pipelines, the presence of several independent but neighbouring ground networks may cause a significant difference in potential leading to dangerous stray currents. In order to prevent this, specific connections are set up to interconnect the various ground networks, thus guaranteeing their equipotentiality.


GTC Ground Tester Clamp software (Additional)

The GTC (Ground Tester Clamp) software can be used to control C.A 6417 communicating earth clamps.

GTC is a tool for:

- Configuring the instruments,
- Downloading and viewing the data stored in the memory and saving them (creation of a *.icp file)
- Perform instantaneous acquisition operations,
- Exporting the measurement data into DATAVIEW (*.dvb files) or an Excel spreadsheet (*.csv or *.xls files)

*Dataview software is not supplied with this version of GTC

Spares & Accessories (Not Supplied):

CA6417 Bluetooth USB Modem P01102112
Dataview Software for CA6416 & CA6417 P01102095
CA641* series, calibration loop - CL1 P01122301


Chauvin Arnoux CA6416 Earth Clamp
C.A 6416C.A 6417
Loop Ohmmeter 1500 Count Display Measurement Ranges (Ω), Resolution (Ω), Accuracy
0.010 to 0.099 / 0.001 / ±1.5 % ±0.01
0.10 to 0.99 / 0.01 / ±1.5 % ±2 r
1.0 to 49.9 / 0.1 / ±1.5 % ±r
50.0 to 99.5 / 0.5 / ±2 % ±r
100 to 199 / 1 / ±3 % ±r
200 to 395 / 5 / ±5 % ±r
400 to 590 / 10 / ±10 % ±r
600 to 1,150 / 50 / Approx. 20 %
1,200 to 1,500 / 50 / Approx. 25 %
Frequencies Measurement frequency 2083Hz / transposition frequency 50, 60, 128 or 2083Hz
Loop Measurement Ranges (μH), Resolution (μH), Accuracy
10 to 100/1/±5% ±r
100 to 500/1/±3% ±r
Ground Voltage Measurements (V) / Resolution (V)
0.1 to 4.9/0.1
5.0 to 49.5/0.5
50.0 to 75.0/1
Ammeter (4000-Count Display) Measurement Ranges (A), Resolution (A), Accuracy
0.200 to 0.999 mA / 1 μA / ±2 % ±50 μA
1.000 to 2.990 mA - 3.00 to 9.99 mA / 10 μA / ±2 % ±50 μA
10.00 to 29.90 mA - 30.0 to 99.9 mA / 100 μA / ±2 % ±r
100.0 to 299.0 mA - 0.300 to 0.990 A / 1 mA / ±2 % ±r
1.000 to 2.990 A - 3.00 to 39.99 A / 10 mA / ±2 % ±r
Modes Standard or Advanced
Alarms Configurable on Z, V and A
Buzzer Active
HOLD Manual or automatic PRE-HOLD
Automatic Power-Off Active/Inactive
General Specifications  
Display 152-segment OLED. Active area 48 x 39 mm
Max. Clamping Diameter Ø 35 mm  
Storage 300 time/date-stamped measurements 2,000 time/date-stamped measurements
Communication - Bluetooth Class 2
Power Supply 4 x 1.5V LR6 (AA) alkaline batteries or 4 x NiMH batteries
Battery Life 1440 measurements of 30 seconds each
Calibration Automatic at start-up
Electrical Safety IEC 61010 600V CAT IV
Protection IP40
Dimensions 55 x 95 x 262mm
Weight Approx 935g with batteries

Standard Delivery 3-5 Day Delivery – UK
£2.95 for all all orders under £40.00 (exld vat). Sent by Royal Mail Tracked, delivered/posted within 3-5 working days from the date of your order, subject to availability.

Standard Free Delivery 3-5 Day Delivery – UK Mainland only - Zone A & B
Included in the price for all orders over £40.00 (exld vat). Sent using FedEx, delivered within 3-5 working days from the date of your order, subject to availability.

Express DPD Delivery 1-2 Day Delivery – UK Mainland only - Zone A & B
£4.50 select at the checkout. Sent using DPD on their Award Winning “Predict” Service with these great key benefits:

  • You are given a one hour delivery window. (no more waiting in all day for your parcel)
  • You are notified by text or e-mail on your parcels progress.
  • Change of plan? You can easily use the text or e-mail to rearrange your delivery.
  • Notifications on your parcel up to 15 minutes before delivery.

Orders must be placed before 3pm for next day delivery and a mobile number supplied, subject to availability.

Next Day Delivery – UK Mainland only - Zone A & B
£8.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for next day delivery, subject to availability.

Saturday Pre 12am - UK Mainland only - Zone A & B
£15.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for Saturday delivery.

Delivery Surcharges
Because of the high cost of carriage we need to apply a surcharge on all deliveries made in the following regions: 

  • Scotland, Isle of Wight & Isles of Scilly - £6.00  
  • Scottish Highlands and Northern Ireland - £12.00  Zone C
  • Scottish Islands, Isle of Man and Channel Islands - £14.00  Zone D
  • Southern Island - £15.00  Zone E


 International delivery

International delivery charges are automatically added to your order at the checkout; you can also use the guide below for a guide on prices. For any questions regarding international deliveries please contact us at

 Zone 1:

  • France, Germany, Belgium, Netherlands, Luxembourg. £20.00 per parcel

Zone 2:

  • Austria, Denmark. £22.00 per parcel
  • Liechtenstein, Switzerland £47.00 per parcel (added cost for custom clearance surcharge)

Zone 3:

  • Czech Republic, Italy, Slovakia, Spain. £28.00 per parcel

Zone 4:

  • Estonia, Finland, Hungary, Poland, Portugal, Slovenia, Sweden. £50.00 per parcel

Zone 5:

  • Bulgaria, Croatia, Greece (incl islands) Latvia, Lithuania, Romania. £60.00 per parcel

Bosnia-Herzegovina, Iceland, Norway, Serbia. £85.00 per (added cost for custom clearance surcharge)

If no shipping option is available to your selected country.  Please call us on +44 (0) 1603 406 148 to purchase your items.