or - if without eyepiece plate to be worked was - the edge of the field screen appears sharp. Afterwards object picture with focus-
rubbed for the right eye sharply places.
Object picture for the left eye with the diopter ring sharply place (not with Feintrieb!).
(10) the work with the voltage regulator for light HS 6/25 __________________________________
The operating voltage for the light HS 6/25 is steplessly placable over the range from
≈
2 up to
≈
7 V. Agreement criteria for correct
handling of the voltage regulator (fig. 2/24):
The life span of the lamp amounts to with 6 V-enterprise
≈
100 hours. It rises with enterprise with undervoltage importantly,
e.g. to
≈
2000 hours with enterprise with 4,8 V, and drops during overvoltage, e.g. on
≈
50 hours with enterprise with 6,5
V.
The color temperature of the lamp amounts to with enterprise with identification tension 6 V 3200 K (= “art light”). With
enterprise with under the red light portions increase tension at the expense of the blue. For subjective observing of the
field this Verschie is still insignificant and usually few disturbing bung the spectral characteristic of the light with 4,8 V.
Floated with
≈
4.8 V represents a favorable compromise between color impression of the field and life span of the lamp.
Further absorption of the light-current if necessary with filter D 282 (position 1 at the filter change-over switch
►
(2)).
When subjective observing with lamp tensions < 4.8 Vkann (too red) the color impression by switching on of the Fil on ters C
312 to be improved (position 2 at the filter change-over switch
►
(2)).
To the color micro photography should be always worked with the full identification tension 6 V: Indicator announcement 6
Skalentei le (further references to the color micro photography you find in the instructions to the micro-photographic putting
on camera system mf-AKS).
The indicator instrument (fig. 2/25) is not a tensiometer, it indicates the relative measure of the lamp tension. With 220 V input
voltage indicates the scale line to 6 exactly 6 V. In the range between 4 up to
≤
6 V is to be counted on deviations up to 0.3 V.
(11) Phase contrast with the standard equipment without Kontrasttubus _
Information about the procedure and about the delivery offer of phase contrast mechanisms, recommendable equipment,
advantages and possibilities of the small mechanisms for phase contrast find you in block letters No. 30-G0540
Operation of the mechanism for phase contrast GF-PA
Phase objectives pH and/or phv into the lens turret screw in (allocation of the objectives to the gun eye target the work project
adapted its, usually in such a way that with the rotation of the lens turret in the clockwise direction ever weils the next-stronger
objective is switched on, dadie ring screens in the modulator gun in this way ange arranges is).
Ring screen guns into the appropriate swallow guidance of the condensor lens A TRAILEr to attack push in and with knurled nut
(fig. 3/34) wedge.
Ring screen guns scolded in such a way that in the sight the symbol appears
O
(free passage).
Switch on objectively; Preparation present, focus and after Köhler light up (with difficulty visible objects with far going closed
aperture diaphragm to focus favourably. Afterwards aperture dazzles again fully opens).
Bertrandlinse switch on focus (
►
(5)) and on (grey on brightly shining underground appearing) the phase rings of the objective.
Aperture diaphragm so far close, to their edge becomes visible and with centering screws (fig. 1/9) to the phase rings to center.
Ring screen guns scolded in such a way that in the sight the en größerung the switched on objective appears. Now in the objective
pupil is overlaid the picture of the phase rings (grey) by the picture of the ring screen (black).
Box spanners on the left and on the right into the centre holes at the ring screen gun would bring in, into those, which were to that-
optical axle because of next. Bring the picture of the lighting ring with the keys with that of the phase rings to the cover.
Aperture diaphragm close, until only more largely and a small bright ring is visible: normal phase contrast (with objectives 25x,
