Products > Test Equipment
Siglent SDL1000X/SDL1000X-E Electronic Load
TheDefpom:
--- Quote from: mawyatt on May 08, 2023, 01:25:53 pm ---Request for tautech.
Rob, could you ping Siglent about a user means to calibrate the SDL1000X ?
We've read the post about writing specific cal numbers to specific memory locations, but that seems risky for our case.
Ours is considerably off in Voltage and Current readings relative to our many DMMs.
Just recently we needed to validate a Korad KWL102 (30V/30A) power supply for a client/colleague, the Korad agreed well with our KS34465A or DMM6500, however the SDL load wasn't doing as well which required us to monitor the setup with a pair of DMMs. This is the type of usage that the SDL should be able to handle without the need for additional support equipment where one can rely on the Voltage & Current readings directly from the SDL.
Anyway, a ping to Siglent home base for a SDL User Calibration Routine would be greatly appreciated.
Best,
--- End quote ---
Did you have the sense connections hooked up (and turned on)? It makes quite a difference.
mawyatt:
--- Quote from: TheDefpom on May 08, 2023, 07:14:45 pm ---
--- Quote from: mawyatt on May 08, 2023, 01:25:53 pm ---Request for tautech.
Rob, could you ping Siglent about a user means to calibrate the SDL1000X ?
We've read the post about writing specific cal numbers to specific memory locations, but that seems risky for our case.
Ours is considerably off in Voltage and Current readings relative to our many DMMs.
Just recently we needed to validate a Korad KWL102 (30V/30A) power supply for a client/colleague, the Korad agreed well with our KS34465A or DMM6500, however the SDL load wasn't doing as well which required us to monitor the setup with a pair of DMMs. This is the type of usage that the SDL should be able to handle without the need for additional support equipment where one can rely on the Voltage & Current readings directly from the SDL.
Anyway, a ping to Siglent home base for a SDL User Calibration Routine would be greatly appreciated.
Best,
--- End quote ---
Did you have the sense connections hooked up (and turned on)? It makes quite a difference.
--- End quote ---
Not using external sense connections at moment. We just had a reasonably large error (~10mv) when reading unloaded or lightly loaded (10ma) voltage relative to a pair of DMMs, one sensing source and another sensistng load (SDL) input. Both DMMs agree, the SDL is off.
Current reading is also off with SDL relative to DMMs. The DMMs we use are either KS34465A (have 3), DMM6500, HP34401A or a AG34401A, and sometimes a SDM3065X (which we need to do the cal routine you kindly created, as it's off relative to all the other DMMs which agree very well, including the 2 old 34401A which show remarkable consistency, however we don't have the proper Cal equipment in house).
Maybe later we'll try with the remote sense, but don't expect this should matter with no load or very light load as little current is flowing and we are using quality #10AWG cables with spade lugs and give plenty of time to thermally stabilize.
Anyway, thanks for the suggestion.
Edit: For example, just turned things on with SDL and a KS34465A sensing the SDL input directly across the input Knobs, a HP34401A sensing the output (source) of a new KWL102 which is set to 10.000V. The SDL is set to 1000 ohms load and the KS34465A reads 10.00006, the HP reads 10.00007V and the SDL reads 10.0066 to 10.0100 bouncing around a lot, unloaded similar result with SDL significant last two digits bouncing. Output of KWL102 is really clean for a switcher, however we get similar result using a SDP3303X.
Best,
tautech:
--- Quote from: mawyatt on May 08, 2023, 01:25:53 pm ---Request for tautech.
Rob, could you ping Siglent about a user means to calibrate the SDL1000X ?
We've read the post about writing specific cal numbers to specific memory locations, but that seems risky for our case.
Ours is considerably off in Voltage and Current readings relative to our many DMMs.
Just recently we needed to validate a Korad KWL102 (30V/30A) power supply for a client/colleague, the Korad agreed well with our KS34465A or DMM6500, however the SDL load wasn't doing as well which required us to monitor the setup with a pair of DMMs. This is the type of usage that the SDL should be able to handle without the need for additional support equipment where one can rely on the Voltage & Current readings directly from the SDL.
Anyway, a ping to Siglent home base for a SDL User Calibration Routine would be greatly appreciated.
Best,
--- End quote ---
Did you notice there's a new Service manual ?
https://int.siglent.com/u_file/download/23_04_12/SDL1000X%20Series%20Service%20Manual_E01B.pdf
While it does not include adjustment procedures there is a section for performance validation where it could be useful to have some data from your unit to forward to the engineers and also check if your unit still meets datasheet spec. See P15
Should you need forward results/tables slip them to me by email please Mike.
mawyatt:
--- Quote from: tautech on May 08, 2023, 09:44:54 pm ---
Did you notice there's a new Service manual ?
https://int.siglent.com/u_file/download/23_04_12/SDL1000X%20Series%20Service%20Manual_E01B.pdf
While it does not include adjustment procedures there is a section for performance validation where it could be useful to have some data from your unit to forward to the engineers and also check if your unit still meets datasheet spec. See P15
Should you need forward results/tables slip them to me by email please Mike.
--- End quote ---
No didn't know about the Service Manual, thanks we'll take a look.
Best,
Self Bias:
Using the Sense input made a good difference for me too. Also I wouldn't use any setting but 2^14 for averaging.
On my unit, I have crimped fork connectors to the sense wires and connect them directly to the input posts for normal use. This already eliminates some error and seemed to make the reading a little more stable.
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