Ultra-Safe Bonding Circuit continuity Tester for Squibs, Bombs, Detonators and Other Explosive Devices. Designed and proven to operatesafely in explosive gaseous volitle atmospheres.

AMPTEC 620UKB

Intrinsically Safe Ohmmeter - EeX-ib-IIC-T4 British Defense Standard Compliant

 Fail Safe Current 8mA Maximum
 47 Resistance Ranges:2Ω-20Ω-200Ω-2KΩ-20KΩ-200KΩ-2MΩ
 100 micro-ohm Resolution (100mW)
 Battery Powered ~ Portable
4-Wire Resistance Measurement

 UK Ministry of Defense EEX Approved
 Display: 19999 ~ High Accuracy
 Ultra Power Line Isolation Igniter Testing
 Digital Low Resistance Ohmmeter (DLRO)
Automatic Lead Resistance Compensation
 MIL STD 810, Method 511F Compliant

The 620UK-B Intrinsically Safe Explosive Ordinance Igniter Tester-Ohmmeter

The 620UK-B Low Resistance Explosive Safety Ohmmeter/Igniter Tester is a portable Intrinsically Safe Explosive Safety Digital Ohmmeter.  It was specifically designed (and UK Ministry of Defense EEX Approved) for ultra-safe resistance testing around fueling depots (flammable vapours present), Aircraft bonds/connections, refineries and explosive devices (i.e. squibs, igniters, flares, detonators, munitions, warheads) in volatile and explosive atmospheres.  The AMPTEC 620UK-B Ohmmeter complies with the EU ATEX Directive and is Intrinsic Safety Standard (Eex-ib-IIc-T4) compliant and certified under the ATEX Laboratory Certificate # SIRA03ATEX2076.  The 620UK-B is Intrinsically Safe certified and can be safely used and "located where flammable gases and vapours of groups IIA, IIB, and IIC are present".  The 620UK-B Ohmmeter is only certified for use in ambient temperatures in the range of -20°C and +40°C and should not be used outside this temparature range. The AMPTEC 620UK-B Safety Ohmmeter is also: EMC tested in accordance with British Defence Standard 59-41 and British Defence Standards 66-31, 07-85 and 05-34 (-40° Cold temperature, Damp Heat +°70C, Humidity and Altitude tests) compliant.  The 620UK-B Ohmmeter provides a reliable and safe means of measuring resistance in explosive and volatile atmospheres.

No Hazardous Mercury Batteries - Any brand of Alkaline "AA" battery will work

The AMPTEC 620UKB Bonding Ohmmeter does not use hazardous mercury batteries like those used in the older model ohmmeters.  It can be powered by any standard high quality brand "AA" Alkaline batteries ( Duracell Ultra or Duracell Coppertoptm MN1500, Energizer, Eveready etc. requires 4 each). The AMPTEC 620UK-B Bonding Milliohmmeter can be safely used with any brand of alkaline "AA" battery, cheaper quality brands of batteries will simply not last as long. 

Acrylic Epoxy Encapsulated Coated Circuit Board and More ...

A common question we get from evaluating safety engineers is "What sort of corrosion preventative on components on the PCB and electrical and  mechanical  measures are taken with the AMPTEC 620UKB to prevent an internal  loose wire, metal screw, or washer inside from floating around and shorting the battery output to the terminal output connections?".  The ohmmeter's output connections are insulated inside the unit with heat shrink tubing covering all of it's conductive surfaces.  The entire PCB (except for the calibration trim pots) is also non-conductive acrylic epoxy encapsulated/coating, to make it extremely difficult if not impossible to expose al conductive pathway. This coating also provides excellent humidity protection and resistance to environmental extremes ( dust etc.) 

Link to Safety Approval Test Reports

Intrinsically Safe Ohmmeter - EeX-ib-IIC-T4 British Defense Standard Compliant

The 620UK-B circuitry has been independently laboratory certified as EEx "Intrinsically Safe" more than just safe in the unlikely event of a worst case component failure.  The AMPTEC 620UK-B Explosive Safety Ohmmeter output current limiting is still in effect, regardless of component failure by total design insite and compliance to the International Safety Standard of EeX-ib-IIC-T4.

MIL STD 810, Method 511, rev F "Explosive and Volatile Atmosphere" Laboratory Tested
The AMPTEC 620UK-B Explosive Safety Ohmmeter has been independently laboratory certified as MIL STD 810, Method 511 (revision F) Explosive and Volatile Atmosphere compliant up to +50°C. The AMPTEC 620UK-B Safety Ohmmeter was remotely operated in an explosive atmospheric chamber ( Air fuel mixed with highly volatile hexane ). While fully operational, the AMPTEC 620UK-B  test lead contacts were successfully shorted then and disconnected 400 times in the explosive atmospheric fuel air mixture and shown to be fully compliant @ +50°C. A copy of the test report is available ( 620UK-B MIL STD 810_511 test ) .
U.S. NAVY Ordnance Safety Board ( Indianhead MD) Approved -  For use on Evolved Sea Sparrow Missile Squibs (ESSM )

NSN 6625-01-542-7587 USAF Bonding Test Package

Selected by the USAF as the replacement for their aging inventory of old Bonding Meters - ideal replacement for obsolete, aging and over-priced 3 ½ digit AC Bonding Meters. As a ruggedized milliohmmeter The AMPTEC 620UK-B offers high accuracy (DC  - better than ½ milliohm), 4 ½ digit resolution, 0.1 milliohm resolution with "No Warm-up" required its ready to use when turned on.  USAF's AMPTEC 620UK-B Bonding Ohmmeter NSN package (6625-01-542-7587) also includes 1) protective padding carrying case, 2) 4-Wire Kelvin Pistol Grip Probes (PG-401), 3) Operator/maintenance manual and 4) U.S.A. N.I.S.T Traceable Calibration Certificate  - MIL STD 130 Marking and MIL STD 129P packaging is optionally available. The AMPTEC 620UK-B Bonding Ohmmeter NSN package was selected by the USAF Aircraft Equipment Maintenance Team to modernize their inventory of old ohmmeters they been using since the 1970's.