Product Description
AMPTEC 720A Safety Micro-Ohmmeter Auto-Ranging
The AMPTEC 720A Safety Micro-Ohmmeter has the identical ranges, resolution and it offers improved accuracy over the

AMPTEC 720A Safety Micro-Ohmmeter
obsolete Keithley 580 Ohmmeter. The AMPTEC 720A Safety Micro-Ohmmeter is an accurate, affordable, seven range, four wire Kelvin based Digital Micro-Ohmmeter and is available with Auto-Range capability. Resistance measurements can be made from 10 µΩ to 200 KΩ on seven ranges with 4 ½ digit (20,000 count or 50 ppm) resolution on the AMPTEC 720A Safety Micro-Ohmmeter. With 0.03% basic accuracy for all the ranges, except the low 200 milli-ohm range (0.05 %) the 720A micro-ohmmeter has accuracy that includes N.I.S.T. traceable calibration certification. The AMPTEC 720A Safety Micro-Ohmmeter is used to test electrical resistance on a wide variety of applications such as motors, transformers, contacts, copper coils, components, bonds and a host of metal to wire connection integrity (i.e. splices) tests. The unit’s high contrast high intensity LED display (25,000 lumens) is also readable in direct sunlight environments. The NSN package also includes the RS232C Interface with Autorange, the Test Lead Storage Pouch, Gold Plated 4 Wire Probes and Gold plated Kelvin Clip leads, US NIST Calibration Certificate and AMPTEC 720A Safety Micro-Ohmmeter operator manual. Four Terminal Configuration, Low thermal EMF binding posts and more
AMPTEC 720A Safety Micro-Ohmmeter Data Sheet AMPTEC_720A_ds Email for Quote: mailto:sales@atequip.com
Four Terminal Kelvin configuration (Voltage high, Current high, Voltage low and Current low) automatically eliminates major sources of resistance measurement errors such as test lead length resistance and test lead connection contact resistance (see our White Paper on 4-Wire-Kelvin measurements). The ohmmeters gold plated low thermal emf 5 Way binding posts also make it easy to securely connect bare test wires, spade lug wiring and DMM style banana jacks. The AMPTEC 720A Safety Micro-Ohmmeter Ohmmeter’s 5-way gold plated copper tellurium input jacks are low thermal emf which helps provide accurate low level resistance measurements when temperature differences and dissimilar metals (thermocouple effect) would normally be a measurement problem.
AMPTEC 720A Safety Micro-Ohmmeter Accurate and Easy Resistance Measurements
The AMPTEC 720A Safety Micro-Ohmmeter makes 4 terminal Kelvin resistance measurements on a variety of devices including the following: Winding resistance and shorted turns of: small motors, alternators, transformers, generators, coils, solenoids, relays, wire spools, chokes and ballasts. Measuring inductors like transformers, motor wings, coils and chokes couldn’t be easier using the AMPTEC 720A Ohmmeter. The AMPTEC 720A Safety Micro-Ohmmeter current source has a compliance voltage of > 1.5VDC. A higher compliance voltage allows the ohmmeter to rapidly charge any inductance associated with making the resistance measurement. The higher the ohmmeter’s compliance voltage (drives the constant current source) the more stable and quicker an inductors (i.e copper coil) resistance can be measured. All AMPTEC 720ASafety Micro-Ohmmeter test lead and probe sets are a minimum 48″ length, dual banana termination at the ohmmeter end. Call ATEquip at 858-756-8742 to discuss custom requirements.
Options
- OP110 Test Lead Pouch (included in NSN package)
- OP232 Isolated RS-232 Interface (included in NSN package)
- OP300 Kelvin Clip Test Leads (included in NSN package)
- OP302 Banana-Jack Kelvin Test Leads (included in NSN package)
- OP350 Large Kelvin Clip Test Leads
- OP401 Single-Point Mini Probe Test Leads
- OP402 Kelvin Micro Probe Test Leads
- OP403 Kelvin Mini Probe Test Leads (included in NSN package)
- OP519 Rack Mount Adapter
- OP620-ISO Isolated Analog Interface
- OP720-BAT Rechargeable Battery Pack with Charger
AMPTEC 720A Available as NSN 6625-01-555-1150 
Data Sheet AMPTEC_720A_ds Email for Quote: mailto:sales@atequip.com
Download Free ” Adobe Reader” Link Download “720A Manual” ~~ Link to “HiPot Explained” Link to “4-Wire Kelvin Explained”
AMPTEC Model | Description | MSRP | ATEquip Price | e-Quote P&D |
---|---|---|---|---|
AMPTEC 601ES | AMPTEC 601ES Explosive Safety DMM | $6395.00 | $6,325.00 | e-QUOTE AMPTEC 601ES |
AMPTEC 620A-4-NSN | AMPTEC 620A-4 (NSN) Igniter Tester(USAF NSN pkg) Includes T ransit Case, Alligator Clip T est Leads, Battery Charger , Connector Adapter and manual |
$3,795.00 | $3,725.00 | e-QUOTE AMPTEC 620A-4 (NSN) |
AMPTEC 620-A-4 (Comm) | AMPTEC 620A-4 (COMM) Igniter Tester (Comm. pkg) Includes Gold Plated Kelvin Clip Leads, “OP401” Probes, Battery Charger and manual |
$3,495.00 | $3,425.00 | e-QUOTE AMPTEC 620A-4 (COMM) |
AMPTEC 620A4R | AMPTEC 620A4-R Water-Dust Resistant Igniter Tester. | $5,495.00 | $5,395.00 | e-QUOTE AMPTEC 620A4-R |
AMPTEC 620BH | AMPTEC 620BH High Range ICT (2, 20, 200, 20Mohm) | $5,295.00 | $5,225.00 | e-QUOTE AMPTEC 620BH |
AMPTEC 620EHR | AMPTEC 620EHR Ruggedized version of 620EH Water-Proof | $5,995.00 | $5,825.00 | e-QUOTE AMPTEC 620EHR |
AMPTEC 620EH | AMPTEC 620EH Mid Range ICT (2, 20, 200, 2 Mohm) | $5,295.00 | $5,225.00 | e-QUOTE AMPTEC 620EH |
AMPTEC 620ES | AMPTEC 620ES Mid Range ICT (2, 20, 200, 200Kohm) | $5,295.00 | $5,225.00 | e-QUOTE AMPTEC 620ES |
AMPTEC 620ESR | AMPTEC 620ESR Water/Dust resistant portable version of 620ES, (2, 20, 200, 200Kohm) | $5,995.00 | $5,825.00 | e-QUOTE AMPTEC 620ESR |
AMPTEC 620GD | AMPTEC 620GD Wide Rng ICT (20 ,20K, 200K, 20Mohm) | $5,495.00 | $5,425.00 | e-QUOTE AMPTEC 620GD |
AMPTEC 620LM | AMPTEC 620LM Systems Igniter Tester ohmmeter | $6,595.00 | $6,495.00 | e-QUOTE AMPTEC 620LM |
AMPTEC 620RK | AMPTEC 620RK System Igniter Tester | $6,595.00 | $6,595.00 | e-QUOTE AMPTEC 620RK |
AMPTEC 620RMS | AMPTEC 620RMS ATE System Igniter Tester | $6,995.00 | $5,955.00 | e-QUOTE AMPTEC 620RMS |
AMPTEC 620VL | AMPTEC 620VL ATE Systems Safe Tester ICT (with OP232& 247) | $6,695.00 | $6,625.00 | e-QUOTE AMPTEC 620VL |
AMPTEC 620VLT | AMPTEC 620VL ATE Systems Safe Tester ICT (with OP232& 247) + Diode | $6,595.00 | $6,525.00 | e-QUOTE AMPTEC 620VLT |
AMPTEC 620VN | AMPTEC 620VN Safe Igniter Tester Ohmmeter with ranges of 20 ?, 200 ?, 2.0 K?, 20 K?, 200 K?, and 2.0 M? | $6,495.00 | $6425.00 | e-QUOTE AMPTEC 620VLT |
AMPTEC 620LK-LM | AMPTEC 620LK-LM Aircraft Safe Bonding Ohmmeter "LM" package. includes padded case, 10’ Kelvin Probe Leads (spear pt.) & 5’Kelvin Probe leads (spear pt.) & spare set spiked tips & F .O.D. resistant case |
$5,695.00 | $5,625.00 | e-QUOTE AMPTEC 620LK-LM |
AMPTEC 620LK-HR | AMPTEC 620LK-HR Aircraft Safe Bonding Ohmmeter High Resolution Version includes padded case, 5’ HD Kelvin probes & F.O.D. resistant case | $5,995.00 | $5,925.00 | e-QUOTE AMPTEC 620LK-HR |
AMPTEC 620LK-P5 | AMPTEC 620LK-P5 Aircraft Safe Bonding Ohmmeter "LM" package. includes padded case, 10’ Kelvin Probe Leads (spear pt.) & 5’Kelvin Probe leads (spear pt.) & spare set spiked tips & F .O.D. resistant case |
$2,495.00 | $2,450.00 | e-QUOTE AMPTEC 620LK-P5 |
AMPTEC 620LK-Comm | AMPTEC 620LK-Comm Aircraft Safe Bonding Ohmmeter includes padded case, 5’ HD Kelvin probes & F.O.D. resistant case | $4,995.00 | $4,925.00 | e-QUOTE AMPTEC 620LK-Comm |
AMPTEC 620UK | AMPTEC 620UK Aircraft Safe with carrying case w/ probe or clip leads, manual & Calibration Cert | $5,995.00 | $5,925.00 | e-QUOTE AMPTEC 620UK |
AMPTEC 620UKB-NSN | AMPTEC 620UKB-NSN Enhanced Aircraft Safe Bonding Ohmmeter with padded case, Handheld Kelvin probes (630-403), Calib Cert etc. | $4,995.00 | $4,945.00 | e-QUOTE AMPTEC 620UKB-NSN |
AMPTEC 620UK-V4 | AMPTEC 620UK-V4 Aircraft Safe 4-Wire Kelvin Version. “Com Pkg” With padded case, | $5,995.00 | $5,925.00 | e-QUOTE AMPTEC 620UK-V4 |
AMPTEC 620EXV | AMPTEC 620EXV &620EXV-NSN Safe DMM includes conductive case | $4,495.00 | $4,945.00 | e-QUOTE AMPTEC 620EXV-NSN |
AMPTEC 620EXV25 | AMPTEC 620EXV25 Ruggedized Oilfield DMM with conductive case heavy duty 25’ long (50’ span) test cable set with brass clamps, 2 spare battery packs and smart charger |
$2,995.00 | $2,965.00 | e-QUOTE AMPTEC 620EXV25 |
AMPTEC 620EX-R4 | AMPTEC 620EX-R4 includes case & Kelvin Leads & Probes | $5,995.00 | $5,955.00 | e-QUOTE AMPTEC 620EX-R4 |
AMPTEC 630BN | AMPTEC 630BN Portable Igniter Tester Ruggedized, Water/Dust Resistance | $6,895.00 | $6,795.00 | e-QUOTE AMPTEC 630BN |
AMPTEC 630ES | AMPTEC 630ES Portable Igniter Tester | $6,395.00 | $6,345.00 | e-QUOTE AMPTEC 630ES |
AMPTEC 640N | AMPTEC 640N Ruggedized Battery Powered Portable Igniter Tester | $6,395.00 | $6,355.00 | e-QUOTE AMPTEC 640N |
AMPTEC 640SL | AMPTEC 640SL Intrinsically-Safe Volt-Ohm Ordinance Igniter Tester | $9,995.00 | $9.945.00 | e-QUOTE AMPTEC 640SL |
AMPTEC 640SL-1 | AMPTEC 640SL-1 Intrinsically-Safe Volt-Ohm Ordinance Igniter Tester | $10,995.00 | $10,945.00 | e-QUOTE AMPTEC 640SL-1 |
AMPTEC 640SL-2 | AMPTEC 640SL-2 Intrinsically-Safe Volt-Ohm Ordinance Igniter Tester | $9,995.00 | $9.945.00 | e-QUOTE AMPTEC 640SL-2 |
AMPTEC 640SL-4 | AMPTEC 640SL-4 Intrinsically-Safe Volt-Ohm Ordinance Igniter Tester | $9,995.00 | $9.945.00 | e-QUOTE AMPTEC 640SL-4 |
AMPTEC 641N | AMPTEC 641N Portable Igniter Tester | $7,995.00 | $7,945.00 | e-QUOTE AMPTEC 641N |
AMPTEC 720A | AMPTEC 720A (Comm Pkg.) with Test Lead Pouch, |
$3,395.00 | $3,345.00 | e-QUOTE AMPTEC 720A-Comm |
AMPTEC 720A-NSN-6625-01-555-1150 | AMPTEC 720A-NSN--6625-01-555-1150 with RS232C, Test Lead Pouch, Kelvin Clip leads, Kelvin Probes & Auto-Range |
$4,295.00 | $4,245.00 | e-QUOTE AMPTEC 720A-NSN |
Amptec Options | Description | Unit Price | Link to e-Quite |
---|---|---|---|
OP110 for 620A Series, 720A, |
OP110 Test Lead Pouch | $95.00 | e-QUOTE OP110 |
OP720-232 720A Series |
OP720-232 RS-232 Interface | $395.00 | e-QUOTE OP232 |
OP232-IS 620A Series |
OP232-ISO Isolated RS232 | $895.00 | e-QUOTE OP232-ISO |
OP300 601ES, 620A, 720A Series |
OP300 Kelvin Clip Test Leads | $175.00 | e-QUOTE OP300 |
OP302 620A Series |
OP302 Banana-Jack Kelvin Test Leads for 620A Series | $95.00 | e-QUOTE OP302 |
OP350 620A Series |
OP350 Large Kelvin Clip Test Leads for 620A Series | $215.00 | e-QUOTE OP350 |
OP401 601ES, 620A, 720A Series |
OP401 Single-Point Mini Probe Test Leads for 620A Series | $160.00 | e-QUOTE |
OP402 620A Series |
OP402 Kelvin Micro Probe Test Leads | $245.00 | e-QUOTE OP401 |
OP403 620A, 720A Series |
OP403 Kelvin Mini Probe Test Leads | $215.00 | e-QUOTE OP403 |
OP519 "S" or"D" 620A-720A Series |
OP519 Rack Mount Adapter for 620A-720A Series | $425.00 | e-QUOTE OP519 |
OP620-500 620A series |
OP620-500 Isolated Analog Interface | $395.00 | e-QUOTE OP620-500 |
OP720-BAT 720A Series |
OP720-BAT Rechargeable Battery Pack with Charger (720A) | $295.00 | e-QUOTE OP720-BAT |
OP720-DC 720A Series |
OP720-DC Replacement Batteries for 720A | $150.00 | e-QUOTE OP232LAB |
OP232LAB 720A Series |
OP232LAB RS232 Printer Interface | $495.00 | e-QUOTE OP232LAB |
OP"SE450" for 720A Series |
OP"SE450" Dymo SE450 Label Writer/Printer | $495.00 | e-QUOTE OP"SE450" |
OP290 for 601ES, 620A Series |
OP290 Alligator Clip Lead Set for 601ES, 620A Series | $125.00 | e-QUOTE OP290 |
OP630-403 630, 640 641N Series |
OP630-403 Hand Held Mini Probes | $235.00 | e-QUOTE OP630-403 |
OP630-304 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-304 4-Wire Banana Calibration Test Leads |
$245.00 | e-QUOTE OP630-304 |
OP630-304G 630, 640 641N Series |
OP630-304G 4-Wire Banana Jack w/Gnd | $265.00 | e-QUOTE OP630-304G |
OP630-304K 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-304K Standard Calibration Test Kit (Leads, Cal Cert & 0.100 ohm ) | $995.00 | e-QUOTE OP630-304K |
OP630-401 630, 640 641N Series |
OP630-401Single Point Hand-held Kelvin Probe | $245.00 | e-QUOTEOP630-401 |
OP630-405K 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-405K 10' Heavy Duty Spiked Kelvin Probes | $365.00 | e-QUOTE OP630-405K |
OP4566T 620LK, 620UK, 620UKB,630, 640 641N Series |
OP4566T Deluxe Cal Kit (Test Leads, 1.0 ohm , 0.100 ohm, 0.001 ohm -NIST Cal ) | $1,895.00 | e-QUOTE OP4566T |
OP630-406S 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-406S 5' Heavy Duty Spear Tipped Kelvin Probes | $245.00 | e-QUOTE OP630-406S |
OP630-405S 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-405S 10' Heavy Duty Spear Tipped Kelvin Probes | $365.00 | e-QUOTE OP630-405S |
OP630-407P 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-407P 5' Heavy Duty Probe | $695.00 | e-QUOTE OP630-407P |
OP630-408J 620LK, 620UK, 620UKB,630, 640 641N Series |
OP630-408J 10' w/Kelvin Clamp Jaws & HD Probe Pkg. | $345.00 | e-QUOTE OP630-408J |
OP630-BAT 630, 640 641N Series |
OP630-BAT 4-NICAD/Fuse | $215.00 | e-QUOTE OP630-BAT |
OP630-DC 630, 640 641N Series |
OP630-DC Battery Charger (Spare) | $215.00 | e-QUOTE OP630-DC |
OP630-305 630, 640 641N Series |
OP630-305 Twin Single Banana Jack Lead Set | $245.00 | e-QUOTE OP630-305 |
OP640-311-TRI 630, 640 641N Series |
OP640-311-TRI Trident to Reynolds 311 Plug for 640SL-2 | $595.00 | e-QUOTE OP640-311-TRI |
OP"UK-305" for 620UK |
OP"UK-305" Twin Single Banana Jack Leads | $295.00 | e-QUOTE OP"UK-305" |
OP"620UK-290" for 620UK, 620UK(V4) |
OP"620UK-290" Alligator Clip Lead Set | $295.00 | e-QUOTE OP"620UK-290" |
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