Products > Test Equipment

TC1 lcr-meter transistor-tester fix

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belzrebuth:
Is the zener diode test somehow disabled in the alternative firmware?
I tried testing a zener today (a 18V one) but no luck..

Gyro:
The tester is only capable of putting out a maximum of 5V (and a little less in practice).

belzrebuth:
Ahh okay.
Thought TC-1 could measure up to 20V zener or something..
edit:
@Gyro I think you may be mistaken.
TC-1 is able to test zeners so maybe my unit has a hardware problem since I've repaired it as can be read a couple of pages back in this thread.

I'm using firmware 1.34m.

madires:

--- Quote from: belzrebuth on March 18, 2022, 01:21:20 pm ---Is the zener diode test somehow disabled in the alternative firmware?
I tried testing a zener today (a 18V one) but no luck..

--- End quote ---


--- Quote from: belzrebuth on March 18, 2022, 01:26:50 pm ---I'm using firmware 1.34m.

--- End quote ---

Have you enabled the Zener test in config.h? The settings should be:
 
--- Code: ---#define HW_ZENER
#define ZENER_DIVIDER_CUSTOM
#define ZENER_R1         100000
#define ZENER_R2         12000
#define ZENER_UNSWITCHED

--- End code ---

And in config_644.h:

--- Code: ---#define TP_ZENER         PA4

--- End code ---

You can find the required settings in the 'Clones' files.

madires:

--- Quote from: belzrebuth on March 18, 2022, 01:26:50 pm ---Thought TC-1 could measure up to 20V zener or something..

--- End quote ---

The older models go up to about 40V. Later models have a different boost converter good for 30V or so.

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