Kippzonen Brewer MkIII Bedienungsanleitung PDF herunterladen (Seite 102)

MKIII OPERATOR’S MANUAL

RS: SLITMASK MOTOR RUN/STOP TEST

The RS test verifies that the slitmask motor (slitmask motor) is operating correctly.

In the normal, or "dynamic" mode of operation the slitmask is cycled rapidly, permitting individual

measurements to be made at intervals of 131 milliseconds. To ensure that the light intensities are

being properly measured in this dynamic mode, the RS test also measures intensities in a "static"

mode. Light passing through each slit is measured for a longer period of time during which the

slitmask motor is stationary.

Type RS. This test runs for approximately 10 minutes, including a five-minute warmup time for the

standard lamp. No further operator interaction is required. Results will be printed in a format similar

to the following:

Table F-3 Typical Slitmask Test Results

POSITION

RUN

234503

1760383

1681139

1704288

1529450

1313677

3062937

STOP

234100

1760880

1682069

1704610

1531027

1313654

3063356

RUN/STOP

1.0017

0.9818

0.9997

0.9994

0.9998

0.9990

1.0000

0.9999

RATIOS (RUN)

-0.036

-0.0319

-0.0586

-0.99

0.2808

0.1657

RATIOS (STOP)

-0.0346

-0.0306

-0.0564

-0.1005

0.2872

0.1682

The test is deemed successful if the ratio RUN/STOP for the five operational wavelengths (slitmask

positions 2..6) are in the range 0.997 to 1.003, and if the ratio for dark count (position 1) lies within

the range 0.20 to 5.0. If the ratios fall outside the acceptance range, there may be problems with

either the slitmask alignment, the slitmask-motor power supply or drive circuitry, or an improper

motor timing constant may have been stored in the instrument Constants File (refer back to the

slitmask-motor timing test, SH).

Normal operational ratios (R1 - R6) are printed out in the last two lines so that ratios in the dynamic

(RUN) and static (STOP) modes can be compared.

DT: PHOTOMULTIPLIER DEADTIME TEST

The DT test measures the deadtime of the photomultiplier and photon-counting circuitry. This test

takes readings at four slitmask positions:

Slitmask Position

Description

BASIC Variable

Darkcount

F(1)

Wavelength 2

F(3)

Wavelength 4

F(5)

Wavelength 2&4

F(7)

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 ... 135 136

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