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- Turn the "Power" switch on. No warm-up period is necessary.
- Place the sample in the holder in the desired position. Insert the holder into the sample cavity until it hits the back of the cavity. Make certain the bottom of the holder sits in the groove in the bottom of the cavity.
- Set the voltage adjustment knob so that the ascending voltage displayed on the meter approaches the desired charging voltage slowly. There is a lag time between adjusting the voltage knob and charging of the capacitors to a given voltage. The set voltage is approached asymptotically over a 30- to 60-s time period. The voltage buildup can be monitored via the digital meter. The most accurate and reproducible results will be obtained if the adjusting knob is set to a point slightly above the desired voltage, so that the desired voltage is approached at a rate of 0.5 V/s.
- If you overshoot the desired voltage, push the trim button until the displayed voltage drops below the desired value. Allow the charging voltage to ascend to the desired value and trigger.
- Measure the induced magnetization in the cryogenic magnetometer or with the spinner magnetometer.
- At the end of each work session, turn the voltage adjustment knob fully counterclockwise and trigger the circuit before turning off the power.
- Note: after being magnetized, samples with a high concentration of magnetic minerals may become too strong to be measured in the SRM. In this case a small rock chip can be used for IRM acquisition experiments or SIRM determinations.
Orienting the Samples
The ASC IM10 impulse magnetizer produces a positive field directed outwards from the unit.