Kipp & Zonen BREWER MK IV, Instruction Manual

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16-10-200716-10-2007
MKIV OPERATOR’S MANUAL 21
mounted on a Tripod assembly and is levelled by means of adjustments on each tripod leg.
Between the Spectrophotometer and the Tracker is a control cable which carries positioning
commands from the Brewer electronics. The positioning commands are input to a motor driver,
which provides drive for a stepper motor. As the motor rotates, it turns a stainless steel vertical
shaft which, in a friction contact, rotates an aluminum plate fixed to the rotational body of the
tracker. The Tracker is fitted with an optical sensor which is used as a reference point, and a
‘Safety Switch’ which removes power to the motor in the event that a failure occurs in the reference
sensing system. The Tracker is fitted with its own power supply and power switch.
Table 2.5 Specifications for the Azimuth Tracker
Resolution ±0.02°.
Accuracy (24 hours) ± 0.2°
Max. slew rate 3.91° /sec
Max. angular excursion -60
o
to +420
o
Payload capabilities:
Max. static torque
Max. balanced weight
14.9 Nm
50 kg
Operating temperature
range -40
o
to +40
o
C
Dimensions
Chassis Enclosure:
Height:
30.5 by 30.5 by 35.6 cm
91.4 cm, with tripod
45.7 cm (18 inch) without
tripod
Power requirements: 120 V AC 60 Hz @ 0.5 A
240 V AC 50 Hz @ 0.25 A
2.3 COMPUTER EQUIPMENT
With the many different Computers available on the world market, it is not possible to qualify all of
them for use in a Brewer Spectrophotometer System.
For this reason KIPP & ZONEN recommends that the Computer equipment be purchased from
KIPP & ZONEN as part of the System, so that a total integration and test can be done prior to
delivery.
In the event that KIPP & ZONEN is not to be the supplier of the computer, then a few points must be
considered:
• the computer must be IBM compatible.
• DOS based computers are most reliable, and good success has also been
experienced with Windows 3.1.
•
problems have been experienced with Brewer / Computer communications using
some makes and models of Windows ‘95, Windows ‘98 and Windows NT computers.
•
speeds to 266 MHz in themselves have not posed serious problems.
• while the Brewer operating software requires only a few MBytes of space, it is
recommended that a hard drive of at least 100 MBytes be used.
• a 3.5” drive will be required.
•
the Brewer System requires one 25 pin serial port (9 pin needs adapter).
•
it is recommended that a dot matrix printer be attached to the computer (at least
during installation), so a printer port will be required.
2. SYSTEM DESCRIPTION