UPDATE 2-Psion posts H1 loss; sees improvement in H2 rev

* Adj op loss from cont ops 1.1 mln stg vs profit 3.8 mln stg

* Rev falls 13 pct to 84.5 mln stg

* Maintains interim dividend of 1.2p

* Shares up as much as 5 pct (Recasts; adds details, CEO comments, updates share movement)

By Purwa Naveen Raman

Aug 13 (Reuters) - British technology group Psion Plc (PON.L) posted a first-half loss, but maintained its dividend and forecast a slight improvement in second-half revenue, sending its shares up as much as 5 percent.

The provider of mobile computing services, which recently implemented 46 million pounds of annual cost-saving measures, said there had been a modest improvement in demand over the last two months.

"The sales force, particularly France, Germany and the U.S., has reported a bit more activity in last two months," Chief Executive John Conoley told Reuters.

He said any increase in the revenue would hugely benefit the company's operating profit due to the recent cost cuts -- which included a 30 percent reduction in operating costs.

The company got a 1 million euro order from its ports business and a 3 million euro order from a field service business in Europe in June and July, Conoley said.

Two analysts on average expect full-year revenue of 172.7 million pounds, according to Reuters estimates.

"That (the market view) doesn't seem unreasonable," Conoley said.

For the first half, adjusted operating loss from continuing operations was 1.1 million pounds ($1.82 million), compared with a profit of 3.8 million pounds in the year-ago period.

Revenue fell 13 percent to 84.5 million pounds. Underlying revenue fell 27 percent in constant currencies.

Psion targets to achieve 10 percent in operating margin in the medium term, but reported a negative adjusted operating margin of 1.3 percent in the first half.

However, Conoley said the recent cost-saving measures made the 10 percent target seemed "doable.".