EARNINGS

Datum Inc.: The Anaheim manufacturer of timing instrumentation and other electronic equipment said it lost $357,000, or 15 cents a share, for the second quarter, contrasted with net income of $213,000, or 9 cents a share, for the same period in 1991. Sales declined 18%, to $6.9 million from $8.4 million. The company said half the loss was related to a large reduction in employees. For the first six months of 1992, Datum lost $337,000, or 14 cents a share, on sales of $14.1 million. For the first half of last year, net income totaled $494,000, or 20 cents a share, on sales of $16.2 million.