Electrical resistance, High velocity gas techniques, Furnaces, Refractory dry out and curing, Sale and hire of equipment, Portable furnace 12m x3.5m x3m

The Model 100A Metal Inspector uses resistivity to help determine the case depth and hardness of metal. It pulses a rapidly reversing direct current into metal through a 4-point probe, and measures the metal?s resistance to the current flow.

Here?s how to use the Model 100 on production samples from your factory. First, place the probe squarely down on a piece of untreated metal and take a reading. Some resistivity is measured.Then take a reading on a similar part that has been heat treated.A higher resistivity is measured.

Metal in a martensitic (hardened) state will always exhibit a higher resistivity to the flow of electricity than ferrite (unhardened) metal because its grain structure has become more tightly packed through heat treatment. The greater the case depth of any given part, the higher the resistivity reading on the Model 100 display screen. Likewise, annealing will bring the resistivity back down.

Transformer

• 50 KVA power source
• Primary Voltages 380, 415, 420
• Secondary Voltage 65 volts
• 6 way Top Hat Unit with
• 6 Contractors 2 per phase
• 110 V Supply points

Principal Features

• Microprocessor based for accuracy and reliability
• Digital indication of set point and time
• Proportional plus integral temperature control
• From 1 to 6 controllers
• Thermocouple inputs electrically isolated
• Bench or panel mounting
• Digital 6 channel actual temperature display
• Compact construction
• Ramp hold feature
• T.C. break protection
• Separate 'up' and 'down' rate setting
• Battery back-up for mains failure
• This instrument is intended to control heating programmes of up to 6 independent channels.

Temperature Recorder

• Type K Chromel - Acumel Sekonic
• 0 - 12000C Honeywel
• 6pt 12pt 16pt 24pt Fuji
• Fully Calibrated Recol
• Chino

Thermocouple Attachment Unit

• 110V rechargeable battery
• Capacitor Discharge
• Charge Control button
• Ready light
• Discharge button