I've got a UNI-T UT33D multimeter that's not working like I want it to, and I'm not sure how to find out what's wrong or if it's salvageable or not. The unit is new, but may possibly have had its battery inserted backwards at some point.
I've tried it with
two three different batteries, two of which seem healthy when measured by another multimeter, and the third one being new from the store.
Resistance readings I can get are as follows:
- Setting | open | shorted
- 200M | OL. | OL.
- 20M | -0.00 | 1.00 -- battery indication for both
- 200k | -00.0 | 10.0 -- batt. ind. for both
- 20k | -0.00 | 1.00 -- batt. ind. for both
- 2000 | -000 | OL -- batt. ind. for both
- 200 | OL. | OL. and batt. ind.
There have been times when the shorted readings have been 243, 24.3 and 2.43 instead.
Voltage readings for 20V and 200V DC on a healthy 9V battery are OL and battery indicator.
All of the above readings are taken with black lead in COM and red lead in the fused connection.
I have checked the following:
- Battery appears healthy
- Battery is correctly inserted
- Test leads are not broken
- Fuses are okay
- Connection from test leads to inside fuses is okay