Mate. They make modern equivalent batteries for these IM-179U’s. The modern replacement is 1.5v (A640PX) and a 6v (A32PX) both of these plentiful online amazon etc. it seems you’re having too much juice peg out your meter. With these batteries I’ve mentioned you can safely do away with the jumper wire and restore it to working condition. Much love from the States. Let’s hope to not have to use them for their intended purposes soon. I also have access to The manual for the Minirad by Jordan which is very similar. If I can help in any way with this Radiac please don’t hesitate to let me know. Side note: your Radiac is Luminous so try a UV light on it and see if the dial glows. Some of these had Radium paint and others had Promethium. Be careful when opening this meter up. Take it easy. - Kess Fox.
@Dutchman1847 Жыл бұрын
We had same issue with 3 of these IM-179s. I think there is a broken wire in the ionisation chamber on the red wire 5.2 volt wire. So pushing the read button the circuit only gets the -1.25 volts which deflects the needle to the left. The 5.2volt circuit doesn't energize because of the broken wire. . Do a continuity check with the switches and battery circuits. I'll bet you will not get continuity on the 5.2v circuit when the read button is pushed. The device is simple. Only resistors and potentiometers switches, meter and battery. So there's not much to go wrong. So, I think the device is kaput, which is sad because they are cool little gizmos.
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Mate. They make modern equivalent batteries for these IM-179U’s. The modern replacement is 1.5v (A640PX) and a 6v (A32PX) both of these plentiful online amazon etc. it seems you’re having too much juice peg out your meter. With these batteries I’ve mentioned you can safely do away with the jumper wire and restore it to working condition. Much love from the States. Let’s hope to not have to use them for their intended purposes soon. I also have access to The manual for the Minirad by Jordan which is very similar. If I can help in any way with this Radiac please don’t hesitate to let me know. Side note: your Radiac is Luminous so try a UV light on it and see if the dial glows. Some of these had Radium paint and others had Promethium. Be careful when opening this meter up. Take it easy. - Kess Fox.
We had same issue with 3 of these IM-179s. I think there is a broken wire in the ionisation chamber on the red wire 5.2 volt wire. So pushing the read button the circuit only gets the -1.25 volts which deflects the needle to the left. The 5.2volt circuit doesn't energize because of the broken wire. . Do a continuity check with the switches and battery circuits. I'll bet you will not get continuity on the 5.2v circuit when the read button is pushed. The device is simple. Only resistors and potentiometers switches, meter and battery. So there's not much to go wrong. So, I think the device is kaput, which is sad because they are cool little gizmos.