Products > Test Equipment

SPD1168X and SPD1305X Siglent PSU's

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stenbror:
Dave..... Time for a teardown..........

bugi:

--- Quote from: nctnico on May 29, 2018, 12:07:55 pm ---Still 10mV/10mA accuracy so they might have left the extra digits out. Voltage: ±(0.03% of reading+10 mV) Current: ±(0. 3% of reading+10 mA)  :palm:

--- End quote ---
Assuming they use "accuracy" and "resolution" somewhat correctly (although, as our lecturer used to say, it is never "accuracy" but "inaccuracy"), then the last digits still have their uses, e.g. to detect a small changes in them. Whether such was e.g. really from 1.234A to 1.235A or from 1.244A to 1.245A might in many cases be less important.  Of course, they have not specified how the inaccuracy behaves, but typically the shown values are still monotonic and linear enough.

(Otherwise most of the 7-8 digit multimeters could leave out 1-2 last digits, too, since most of them are "only" specified to be accurate to 6 digits, or 5 digits after a year.)

tautech:
Some quick facts/findings from the first I've seen of these:

2s boot time.
Quiet smart fan. 80mm. At no time with the following tests and loads did the fan speed increase.
2 sets of 650mm leads with croc clips, one set with open lug terminals and the other with molded banana plugs.
Output enable soft key driving an output relay. Note, the relay is only bought into ON switching function at voltages above 4.4V settings below which silicon is doing the switching.
19mm terminal spacing.


Overshoot test, high current.
12V set, 8A set.
12V halogen auto lamp, 5A draw.

DSO SDS1104X-E, 10x stock probe, Normal triggering.



Ripple check.
Load as above.


-------------------------------------------------------------------------------------------

Overshoot test, low current.
4.4V set, 8A set
Red LED with 1k current limit resistor.
5mA displayed as drawn.



Ripple check.
Load as above.




More checks and tests later.

flash2b:
Is the spacing between de banana terminals the regular 19mm or still 20mm like the other Siglent units ?

tautech:

--- Quote from: flash2b on July 19, 2018, 08:28:14 am ---Is the spacing between de banana terminals the regular 19mm or still 20mm like the other Siglent units ?

--- End quote ---
19mm.
Reply #12 updated to indicate this.

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