Lower voltage or higher frequency will decrease the precision. Current Frequency counter can be selected in any current range. Continuity beeps when resistance is below 83ohm and is intermittent below ohm. Continuity is 0.
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Lower voltage or higher frequency will decrease the precision. Current Frequency counter can be selected in any current range. Continuity beeps when resistance is below 83ohm and is intermittent below ohm. Continuity is 0. Current consumption of meter is 1. The meter usual need two display update to reach the final value. Viewing angle is good, except from the top. Will automatic turn power off in about 19 minutes. To disable auto power off hold down the yellow button when turning the meter on, this will also disable automatic backlight off.
Weight is g without accessories, but with rubber sleeve and batteries. Size is x 92 x 44mm with rubber sleeve. Probes Probe resistance 34mOhm for one. Probe wire is cm long. A look at the capacitance measurement waveform. Frequency input resistance. Tear down 6 long screws and the back could be removed. This DMM has real input protection. The two fuses are V and HRC, i. The mA current shut is R21 1ohm and the uA shut is R25 ohm. The chip U8 near the input terminals is probably for measuring temperature and used for compensation when using thermocouplers.
It looks like they are low on pins for the main chip U1 , there is a chip UHC to encode 8 switch positions onto 3 bits. The other HC U2 is probably doing something similar, maybe with the switches?
The slots are used for plastic shields, this greatly increases the isolation distance. The group of 6 golden points near the two square battery connections are for calibration, there is a hole in the bottom of the battery compartment for access. The circuit board is 4 layer, here I have added some light from behind, this makes it possible to see some of the buried traces.
And from the other side. It has good input protection, making it safe to use within its marked CAT rating. For a Fluke this DMM is fairly cheap, but that do not make it a cheap meter. It has the usual ranges for a good DMM, but nothing extra.
Fluke TL75 TEST LEAD SET
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