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Ballantine 9601M explosion proof ac voltmeter osha


Vintage Ballantine 9601M Explosion Proof AC Voltmeter OSHA AN/USM-413
This is a New In Box vintage meter. IT HAS NEVER BEEN USED AND LOOKS JUST AS IT DID WHEN IT LEFT THE FACTORY. It has been sealed in original carton & packing since manufacture in 1977, I opened it for the first time in Feb 2008 to take photos and re-packed it exactly as I found it. Original 1977 List Price: $995.00
Ballantine Laboratories Inc Model 9601A
A SAFE ENVIROMENNTALIZED AC VOLTMETER 9601A
Provides Maximum Operator Safety in High Hazzard Operations
* - Conforms to OSHA and Industry Safety Requirements
* - Fully Portable Line and Battery Powered
* - Rain, Dust, Salt Fog Resistant
* - RMS Responding on Distorted Wave forms from 10Hz to 1Mhz
* - Maintains Accuracy from -40C to 71C
The Ballantine 9601A is an industrial ac rms-responding voltmeter and amplifier that conforms to OSHA and industry safety requirements for operation in hazardous locations and hostile environments.
The meter is the industrial model of the U.S. Air Force ANNN/USM-413, a class 2 military environmentalized instrument. The instrument was developed for testing electronic and electrical equipment in an uncontrolled flight line environment where service usage demands explosion proof performance in heavy gasoline vapor atmospheres. The volt meter is constructed to promote the safety of operating and maintenance personnel. It is an ideal instrument for many heavy duty industrial applications where maximum protection for both the operator, the environment and the meter are primary requisites.
The Model 9601A covers six decade rannges from 5 millivolts to 500 volts full scale over a bandwidth from 10Hz to beyond 1MHz. It is rms responding and can measure waveforms with the kind of distortion commonly encountered in industrial testing without change in its basic accuracy of +/- 3% of reading. The meter is also usable as a wideband precision amplifier providing siz 20dB steps of gain over an absolute range of 124dB total.
Operation in completely unsheltered environments is reliable and fast. The 9601A is immediately usable under any combination of operational and environmental conditions called out by MIL-T-21200 for Class 2 equipmennt. Temperature coefficient of accuracy is less than +/-0.05%/C from -40C to +15C and from +35C to +55C. Use it with confidence out of doors in the arctic or in hot steel mills. Its explosion proof qualities are assured by full compliance to the stringent explosive atmosphere tests of MIL-STD-810B, Method 511, Procedure 1.
Further safety provisions for the user result from the 9601A's capability of operating without damage while floating off-ground to +/-500 volts peak. Additionally the unit is internally protected against input overloads to 1500 volts on all ranges above 5 volts and to 500 volts on all lower ranges. The instrument will recover from an overload within 10 seconds. Use it with confidence on power lines on top of poles or in manholes.
The tough, shock resistant, flame retardant thick walled LEXAN case is metallized internally to provide conformance with the EMI characteristics of MIL-STD-461 for Class C1 Equipmennt. The case is gasketed at the front panel and all shafts, making it rain proof, dust proof, salt-fog resistant, and switches are sealed. A gasketed front cover includes a storage compartment for probes and ac power cable. A piggy back battery pack is built into a separate compartment in a gasketed cover secured to the rear of the meter case, completely isolating the batteries to avoid damage to internal circuitry in the event of battery leakage. The unit meets severe military shock and vibration specs.
An important feature when using battery power is the availability of 8-hours of continuous use in temperatures from 0C to 55C and a full 4-hours when operating at -40C.
All characteristics of the Ballantine 9601A make it the safest instrument to use in such high risk plants and applications as:
* Power Distribution and Generation
* Processing Mills and Refineries
* Gas Production and Pipe Lines
* Chemical and Mineral Processing
* Marine LPG and Oil Tankers



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