In the late 1970s and 80s, the Micronta 22-212 8-Range Multitester Go to product viewer dialog for this item.
Use cases
| Problem | Likely Cause (per manual) | Solution | | :--- | :--- | :--- | | No reading on any range | Dead internal fuse (0.5A, 250V, fast-blow) | Replace fuse. Access via back cover. | | Ohms function won't zero | Low batteries (1.5V or 9V) | Replace both batteries. | | Needle sticks or moves sluggishly | Debris in movement or mechanical damage | Service by qualified technician only. | | Inaccurate DC voltage readings | Worn test leads or internal calibration drift | Clean leads. For calibration, return to RadioShack (not possible now—seek vintage calibration guide). | | AC voltage reads on DC scale | Incorrect switch setting | Ensure function switch is on ACV, not DCV. | micronta multimeter 22 212 user manual
Never apply more than 1000V DC between the input jacks and earth ground. In the late 1970s and 80s, the Micronta
In the world of vintage electronics test equipment, few names evoke as much nostalgia and reliability as —a brand name exclusively used by RadioShack for decades. Among their most popular and enduring products was the Micronta Multimeter 22-212 . While modern electricians and hobbyists have largely moved to digital multimeters, the 22-212 remains a beloved analog (needle-based) multimeter known for its durability and accuracy in measuring voltage, current, and resistance. | | Ohms function won't zero | Low batteries (1
With probes disconnected, use a small screwdriver to turn the plastic screw at the base of the needle until it points exactly to "0" on the left side of the scale.
The analog scale plate has 4 primary arcs: