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Basic battery-powered portable DVM.
To operate without batteries, apply 5-6VDC tip+ to rear jack.
Internals.
Upper board containing LSI chip, display and power supply.
Lower board containing range switching and analog circuitry.
| Serial Number: | 71-06046 |
| Year of Manufacture: | 1978 (IC date code of 7814, copyright on case 1977). |
| Date of Receipt: | 29 Apr 2012 |
| State upon Receipt: | Fair physical condition. Battery leakage pooled at bottom of case. Some corrosion to battery contacts, input contact and LM307 IC leads. Some components had been replaced previously. |
| Date: | 30 Apr 2012 |
| Procedure: | Cleaned, powered up with 6V at battery contacts, ohms functional. Battery and input contacts cleaned. |
| Date: | 02 May 2012 |
| Procedure: | Partial schematic produced. Soldering of previous repairs cleaned up. DCV and ohms functional. AC not yet tested, nor connections around LM307. |
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.. | B & K 2810 | ..
Early Digital Test Equipment |
bhilpert |