Download the Model 630ES Datasheet (pdf version)

The 630ES Explosive Safety Igniter Tester
The 630ES Explosive Safety Igniter Tester is a ruggedised, water-resistant, portable digital ohmmeter which has been specifically designed for ultra-safe resistance testing on explosive devices (i.e. squibs, igniters, flares, detonators, warheads). The 630ES has had the unit's circuitry reviewed and approved by many U.S. Gov. Safety Boards as well as most branches of the armed forces for specific military programs (i.e. US Navy Cruise Missile, US Department of Energy) - Contact us for a copy of the Safety Approvals.
The 630ES case is waterproof when closed to a depth of 3 feet. The 630ES also floats in water. It can be operated outside in direct rain, as it has silicon boot seals over all switches.

Fail-safe Design - Built-in 'Can't Fail' Life Saving Features
There are a variety of critical military, aerospace and industrial applications which utilise squibs and other blasting devices. In each case, it is extremely important that these devices detonate when required. It is equally important that these devices do not detonate while being tested for coil integrity. To this end, each instrument is equipped with redundant, dual fail-safe current limiting resistor network circuitry to ensure that the instrument test currents cannot exceed the specified amount. Even in the unlikely event of a worst case component failure, the output current limiting network is still in effect. To prove that this level of safety is intact in every unit we ship, a worst case component failure is simulated during final test with the resulting output recorded and attached to the unit.
Click here to download the Critical Circuit Failure Analysis for the Model 630ES.

Low Ohm Range - Accuracy and Resolution
A common question asked is "What does Permac offer to improve the measurement accuracy and resolution with a low resistance value squib/detonator measurement/application?". The 630ES offers the following fullscale ranges - 2.0 Ohms, 20 Ohms, 200 Ohms and 200 Kohms. The 2.0 Ohm fullscale range provides a four-wire Kelvin resistance measurement from 0.0000 ohms to 1.9999 ohms. The 2.0 Ohm range also offers a low (1/10) 0.1 milliohm or 100 microhm resolution. Permac offers an optional Four Wire Kelvin (OP300) Lead set that eliminate the effects of test lead length resistance and contact resistance errors. The 200 Kohm range provides a relatively high resistance range for determining an open circuit (less than 200 Kohms) status on ordnance wiring.

Keylocked Safety Switch when Measuring
The Key Locked Safety/Measure Switch has two modes. The shorted safe mode shorts the inputs together and disconnects them from the 630ES. If the user removes the key, the 630ES is locked in "Safe Mode" ( it cannot be accidentally switched to measure mode). When the 630ES user removes the key, the 630ES cannot be made to measure or provide any electrical stimulus to the squib under test. The limited access (one use at a time) external connection port on the 630ES also makes it physically impossible to simultaneously connect the AC/DC Charger while measuring with the test leads. Whether charging the Ni-Cad batteries or measuring a squib's resistance, there is only one connection port. The 630ES operator can connect the AC/DC Battery Charger to the 630ES limited access connection port for recharging the Ni-Cad batteries thus mechanically blocking access for the measuring sense leads. When measuring, using the sense leads, the same limited access connection port then blocks any battery charger connection.
Click here to download the Safety Keyswitch and related pin/socket contact connection detail for the 630ES.

Impossible to connect the AC/DC Charger when Measuring
For all external connections there is only one main connector. The 630ES operator can connect the AC/DC battery charger to the 630ES for recharging the Ni-Cad batteries, thus mechanically blocking the connecting site for the measuring/sense leads. In order to measure, the battery charger plug must be removed, thus providing physical/mechanical access for the test leads to connect to the 630ES (see photo above).

Faraday Cage provides Electronic Noise Immunity, EMP and Static protection
The 630A electronics are encased in a shielded Faraday cage (all to chassis ground) to provide additional electronic noise immunity, Electromagnetic Pulse ( EMP) and electrostatic discharge (ESD) protection.

Better and Safer than a Multifunction DMM
Multifunction DMM's have many modes (i.e. DC Voltage, AC Voltage, DC current, AC current, frequency, shift keys, Capacitance and more..) that can measure igniter circuit resistance incorrectly. If the DMM has an electrical fault the igniter circuit may accidentally fire. The 630ES Igniter Tester only measures resistance, it is not a complex multifunction DMM. If the 630ES had an electrical fault it offers the life saving advantage of failing safe.

Verify the 630ES milliampere current output with the Onboard Milliammeter and Test Resistors
The 630ES Igniter Tester comes with a SIMPSON tm DC millammeter built into the 630ES Function Test Section. The built-in analog milliammeter measures the 630ES test current and spans from 0 to 10 millamperes fullscale. This lets the 630ES user truly verify that the 630ES test current is at "SAFE" levels, just prior to measuring squib resistance. See the 630ES diagram below for a more detailed view of the FUNCTION TEST SECTION and the test resistors.

 
Click here to Download the Adobe Acrobat Reader version of the Model 630ES Tester feature sheet (normally laminated to lid).

1. Calibration/Maintenance access screws, easily covered with a tamper proof seal or sticker.
2. Purge Valve - Provides air pressure equalization to open.
3. Handles - see item 1 then lift for calibration access.
4. Single Access Notched Connector - for either test lead hookup or connection to battery charger.
5. Milliammeter for measuring actual 630ES test current levels.
6. Minus sign - indicates 'low battery level' recharge time. The charger connection mechanically blocks access to make any measurements with the test leads.
7. Fuse Access - for general operation (seal in cap of holder).
8. Zero pot - Adjusts the shorted resistance offset of the test leads.
9. Keylock Switch - locks the 630ES in Safe mode - shorts inputs together and disconnects/isolates user inputs from measurement electronics.
10. Milliammeter Input jack to test 630ES current levels.
11. Input jack of 0.1 ohm test resistor for checking the low and zero offset of the 2 Ohm and 20 ohm ranges.
12. } 1 ohm and 10 ohm test resistors for checking the
13. } mid-scale functionality of the 2 ohm and 20 ohm ranges.
14. Chassis Common Input jack - (plug-in black banana jack) - Faraday cage & shields for test leads connect here (see manual).
15. } 100 ohm, 100K ohm, and 190K ohm test resistors
16. } for checking the mid-scale functionality of the
17. } 200 ohm and 200K ohm ranges of the 630ES.
18. Water Resistant O-ring seals in lid & under the front plate.
19. Tight Squeeze Flip Latch Area - waterproof seal (closed).
20. Resistance Ranges - 2 ohm, 20 ohm, 200 ohm, and 200 Kohm - silicone boots provide water-resistant switch cover (LED indicates the selected range).
21. Power 'On' or 'OFF/Charging Switch'.
22. Beveled Display Hood and Super Bright LED Display readable in sunlight. The 2 Ohm range has 100 µ Ohm resolution.

No Hazardous Mercury Batteries
The 630ES does not use hazardous mercury batteries like those in older igniter testers. All 630ES's are battery powered with a heavy duty rechargeable Ni-Cad pack for portability purposes. A 120 VAC powered battery charger is standard.

It floats in water, and can be operated in direct rain.

Polyurethane Epoxy Coated Circuit Board and More ...
A common question we get from evaluating safety engineers is "What sort of electrical and mechanical measures are taken with the 630ES to prevent an internal loose wire, metal screw, or washer inside from floating around and shorting the battery output to the terminal output posts?". The ohmmeter's output posts are insulated inside the unit with heat shrink tubing covering any of it's conductive surfaces. The entire PCB (except for the calibration trim pots) is also nonconductive polyurethane epoxy coated, to make it extremely difficult to get an accidental conductive pathway. The ultimate electrical safety analysis for fail-safe current relies on "Ohms Law" for determining Imax, based upon a Vmax ( ~ 4.8 VDC battery value) divided by the equivalent circuit current limiting resistance (R-limit) for the particular version being considered. 630ES circuit schematics are available upon request for reviewing the maximum fail-safe current level.

Super bright LEDS visible in direct sunlight

Specifications
Accuracy: (180 days 25°C ± 10°C) ± 0.02% of reading  ± 0.05% of range for 2.0 ohm range, 0.02% of reading  ± 0.02% of range for 20 ohm through 200 Kohm ranges. Call Permac for any ranges above 200 Kohms
Display: 4½ digit (19999) L.E.D.  - 20,000 counts (Display visible in direct sunlight (5 times brighter than high intensity LEDs))
Terminal Configuration: Four-wire Kelvin
Overload Indication: Display flashes
Maximum Input: 250 VDC or peak AC without damage
Operating Temperature Range: 0°C to 50°C
Temperature Coefficient: ±.002% per °C (from 0°C to 15°C and 35°C to 50°C)
Conversion Rate: Approximately 3 per second
Power: Rechargeable Ni-Cad batteries (5.0 Ahr) & Charger (115 VAC 50-60 Hz) (For Safety Reasons, the 630ES Explosive Safety Meter operation is electrically disabled and mechanically blocked (no mechanical access to the test lead connection) while charging the batteries).
Max. Internal Voltage: 4.8 VDC - 4 ea. 1.2 V   Ni-Cads
Size: 295mm/11.5" D x 335mm/13.5" W x 155mm/6" H
Weight: 12lbs NET - 15 lbs shipping