Saint Hill Manor, East Grinstead, Sussex HCO BULLETIN OF 18 MARCH 1974 | Saint Hill Manor, East Grinstead, Sussex HCO BULLETIN OF 18 MARCH 1974 |
E-METERS Sensitivity Errors | E-METERS Sensitivity Errors |
An auditor must set the Sensitivity of an E-Meter exactly right for each pc. | An auditor must set the Sensitivity of an E-Meter exactly right for each pc. |
The setting is different for almost every pc. | The setting is different for almost every pc. |
TOO LOW | TOO LOW |
Too low a Sensitivity on some pcs (like Sens 5-32) will obscure reads and make them look like ticks. It will obscure an F/N. Whereas a Sens 16-128 will show reads and F/Ns. | Too low a Sensitivity on some pcs (like Sens 5-32) will obscure reads and make them look like ticks. It will obscure an F/N. Whereas a Sens 16-128 will show reads and F/Ns. |
A pc can be hindered by the auditor not setting the Sensitivity high enough to show reads and F/Ns. Items are missed as well as F/Ns. | A pc can be hindered by the auditor not setting the Sensitivity high enough to show reads and F/Ns. Items are missed as well as F/Ns. |
TOO HIGH | TOO HIGH |
When auditing a flying pc or a Clear or OT the auditor who sets the Sensitivity too high gets weird impressions of the case. | When auditing a flying pc or a Clear or OT the auditor who sets the Sensitivity too high gets weird impressions of the case. |
"Latent reads" on such a case are common. They aren't latent at all. What happens is that the F/N is more than a dial wide at high Sensitivity and a started F/N looks like a read as its sweep is stopped by the pin on the right of the dial. | "Latent reads" on such a case are common. They aren't latent at all. What happens is that the F/N is more than a dial wide at high Sensitivity and a started F/N looks like a read as its sweep is stopped by the pin on the right of the dial. |
In this way uncharged items are taken up, the case is slowed, overrun and general upsets requiring repairs occur. | In this way uncharged items are taken up, the case is slowed, overrun and general upsets requiring repairs occur. |
On one hand electrode an OT VII sometimes has a ¾ dial wide F/N at Sens 5-32. | On one hand electrode an OT VII sometimes has a ¾ dial wide F/N at Sens 5-32. |
This would mean a ¾ dial F/N at Sens 2-32 with two cans. | This would mean a ¾ dial F/N at Sens 2-32 with two cans. |
A Clear sometimes has a floating TA at Sens 32-32 instead of an F/N. He would have to be run at Sens 3-32 two cans to keep him on a dial or detect F/Ns. | A Clear sometimes has a floating TA at Sens 32-32 instead of an F/N. He would have to be run at Sens 3-32 two cans to keep him on a dial or detect F/Ns. |
This is a very important matter as the auditor will miss F/Ns, think beginning F/Ns are reads and as the Pre-OT is off the dial, miss reads. | This is a very important matter as the auditor will miss F/Ns, think beginning F/Ns are reads and as the Pre-OT is off the dial, miss reads. |
Thus uncharged areas are run and charged ones are missed. | Thus uncharged areas are run and charged ones are missed. |
The result is very chaotic to repair. | The result is very chaotic to repair. |
Some lower level pcs also have a need for lower Sensitivity settings. | Some lower level pcs also have a need for lower Sensitivity settings. |
SUMMARY | SUMMARY |
Sometimes an easy pc looks very difficult just because of wrong Sensitivity settings. | Sometimes an easy pc looks very difficult just because of wrong Sensitivity settings. |
Set the Sensitivity for the pc for a half dial F/N maximum or minimum. | Set the Sensitivity for the pc for a half dial F/N maximum or minimum. |
Don't get repairs. | Don't get repairs. |
Get wins. | Get wins. |
Founder | Founder |