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MICROCOPY RESOLUTION TEST CHART
NATIONAL BUREAU OF STANDARDS - 1963
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LEGAL NOTICE
This report was prepared as an account of
Government sponsored work. Neither the
United States, nor the Commission, nor any
person acting on behalf of the Commission:
A. Makes any warranty or representa-
tion, expressed or implied, with respect to
the accuracy, completeness, or usefulness
of the information contained in this report,
or that the use of any information, appa-
ratus, method, or process disclosed in this
report may not infringe privately owned
rights; or
B. Assumes any liabilities with respect
to the use of, or for damages resulting from
the use of any information, apparatus,
method, or process disclosed in this report.
As used in the above, "person acting on
behalf of the Commission" includes any em-
ployee or contractor of the Commission, or
employee of such contractor, to the extent
that such employee or contractor of the
Commission, or employee of such contractor
prepares, disseminates, or provides access
to, any information pursuant to his employ-
ment or contract with the Commission, or
his employment with such contractor.
... samisalim p
rin ...
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ORNI - AEC - OFFICIAL
ORN L. P. 153/ p
Con F-651101-11
MASTER
ORNI - AEC - OPSICIAL
SEP 1 61965
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ANALYTICAL LABORATORY HOT-CELL EQUIPMENT:
.
III. A REMOTELY OPERATED FILTER PHOTOMETER
..
W. L. Maddox
Analytical Chemistry Division
Oak Ridge National Laboratory
Oak Ridge, Tennessee.
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RELEASED FOR ANNOUNCEMENT
IN NUCLEAR SCIENCE ABSTRACI'S
---
ORNI - AEC - OFFICIAL
* Research sponsored by the U. 8. Atomic Energy Commission under contract
. With the Union Carbide Corporation.
.
'ORNL - AEC - OFFICIAL
..
............... ....-----
ORNI - AEC - OFFICIAL
The ORNL Remotely operated Mlter Photometer() consists of a
"Densichron -2 "12) photometric unit (right, Mg. 1) and a remote sensing
unit (center). Constent-voltage transformers for these are housed in a
control box (left).
This note describes the new remote sensing unit, shown partially
..dismantled in Fig. 2, which was designed in order to make use of a variety
of absorption cells (cuvettes) and to simplify remote maintenance. The
· ORNI - AEC - OFFICIAL
remote unit includes the light source, cuvette compartment, cuvettes and
carrier, several interference filters and their holders, and a Densichron
phototube probe. The probes are used as bought; the light source and
cuveite carrier are modified.
· LIGHT SOURCE
The tungsten light source is taken from an Ao Spencer type 653
illuminator(5). Several bulbs having the electrical leads soldered to
their base contacts in order to ensure stability of the emitted light
are prepared for each 11).uminator. Each bulb 18 mounted in a sleeve that
. will slip into the base 'assembly (background, Fig. 2) in order to make
remote bulb replacement easy. .
A small thumb screw : that holds the base assembly in place has been
replaced with one having a head large enough to permit handling by Model 8
manipulators.
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ABSORPTION CELL COMPARTMENT
ORNI - AEC - OFFICIAL
The body of the remote sensing unit, machined from a solid block of
aluminum, has a compartment large enough to accommodate 50-mm' path length
absorption cells or & vessel for photometric titrations. It is massive
enough to remain in place during fairly rough bandling, and to dissipate
the heat generated by the light source without a marked increase in temperature.
ORNL - AEC - OFFICIAL
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-
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:
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· ORNL - AEC - OFFICIAL
: ORNL - AEC - OFFICIAL
Its black finish contributes markedly' to heat dissipation. It sits on
disposable "lega" made from standard plastic-sleeved electrical banana plugs ,
The near-side slot (Fig. 2) fits the filter hold-
er. A smaller slot in the far side can be used for a heat filter(2), 17.
necessary. The phototube probe fits into a recess in the side and 18 se-
cured by the large thumb (or rather, manipulator) screw. Blue-sensitive
and red-sensitive Densichron probes can be easily exchanged remotely ca
this unit.
.
One light-beam defining aperture is machined into the block; Another
is part of the Densichron probe. Black-anodized metal surfaces reduce the
..
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reflection of stray light into the probéo.
CARRIER
The Coleman
cuvette carrier which accomodates 20 x 40 mm rectangular
and 25 mm or 50 mom cylindrical absorption cells has a slotted aluminum piece
::
added to the handle so that it can be picked up by manipulators.' Adapters
as shown in Fig. 2 were made for the commonly used 13 x 13 mm absorption
cells. Eitier of a pair of cells can be positioned in the light bean by a
manipulator.
FILTER HOLDERS
.
Holders for the interference filters used to isolate chosen waveleng tins 17
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are designed so that the filters can be removed from the holders and reinserted
remotely. This is normally done only when a filter has been damaged. Several
holders, each holding the filter for a given wavelength, are furnished with
each instrument.
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CONSTRUCTION AND OPERATION
ORNI - AEC - OFFICIAL
Detailed construction drawings are available. Also, a revision of the
ORNI - AEC - OFFICIAL
ORNL. Master Analytical Manual inethod that describes the procedure for the
ORNI - AEC - Off
.
· ORNL - AEC - OFFICIAL.
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ment and will be issued in Supplement 8 of TID-7015.
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use and maintenance of the earlier model ") 18 in preparation for this instru-
1VI21
SV. INO
REFERENCES
1. M. T. Kelley, E. B. Wagner, W. L. Maddox, 1. C. Jones, and D. J. Mober,
"Remotely Operated Filter Photometer," Anal. Chem. 20, 1711 (1958)..
2. The Welch Scientific Company, 7300 N. Lnder Ave., Skokie, Ill.
3. E. 1. Sargent & Co., Chicago, Ill., Catalog. 113, p 693 (1964).
4. Coleman Instruments, Inc., Maywood, Ill.
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END
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| 10/15/65
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