Hitachi U-5100 Instruction Manual page 276

5.1 Check with Instrument Main Unit Alone
[For automatic execution of instrument performance check]
For automatically executing instrument performance check,
press the <1> key (Performance Check (Auto)) and then
the [ENTER] key. For subsequent operation, refer to
section 5.1.8.
[For instrument performance check in each item]
For checking instrument performance in each performance
item, press the <2> key (Performance Check (Manual)) and
then the [ENTER] key. For subsequent operation, refer to
section 5.1.1 to 5.1.6.
[For instrument performance check with separately
available Hg lamp]
For checking instrument performance with a Hg lamp
available at option, press the <3> key (Performance Check
(Option)) and then the [ENTER] key. For subsequent
operation, refer to section 5.2.1 to 5.2.3."
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