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DM502: Difference between revisions
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It has an Int/Ext switch that allows alternate input connections via the rear interface to be selected. | It has an Int/Ext switch that allows alternate input connections via the rear interface to be selected. | ||
The DM502 is available with an input for temperature measurement with a transistor | The DM502 is available with an input for temperature measurement with a transistor temperature probe ([[P6430]]) | ||
using an NPN transistor, e.g. a 2N2484 (any NPN-Transistor with h<sub>FE</sub> >150 can be used). | |||
The DM502'''A''' model adds an input for a PT-100 temperature probe ([[P6601]]), a | The DM502'''A''' model adds an input for a PT-100 temperature probe ([[P6601]]), a True RMS converter, | ||
and offset circuits to read dB directly in all ranges. An "Option 2" instrument deletes the temperature | |||
measurement function, P6601 temperature probe, and all internal circuits associated with this function. | |||
The rear interface of DM502'''A''' is limited compared to the DM502: No current input and no reading output, see gallery below. | |||
The | The 2 kΩ measurement range (+HI in DM502A) can be used for diode testing, since a current source of 1 mA is active | ||
and the reading corresponds to the (forward) voltage drop of the diode in | and the reading corresponds to the (forward) voltage drop of the diode in Volts. The voltage can rise to a maximum of 10 V. | ||
A second voltmeter is needed to measure the voltage if 2 V are exceeded. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||