General Information

Serial #

RTP 88-012-059

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

PLASTIC & CARDBOARD CASING/ PLASTIC TRANSMITTER CONE/ SYNTHETIC & METAL WORKING PARTS/ CORD/ HYGRISTOR IN METAL CAN

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

17.1 cm

Width

13.0 cm

Height

25.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Upper air pressure, temperature & humidity measurement

Sub-Category

N/A

Manufacturer

AKA

VALCOM

Country

Canada

State/Province

Ontario

City

Guelph

Context

Country

Canada

State/Province

Unknown

Period

C.1990

Canada

A CANADIAN MADE RADIOSONDE, MADE FOR THE ATMOSPHERIC ENVIRONMENT SERVICE OF ENVIRONMENT CANADA

Function

A DEVICE LIFTED BY BALLOON INTO THE UPPER ATMOSPHERE TO MEASURE TEMPERATURE, HUMIDITY, & AIR PRESSURE & TRANSMIT DATA TO EARTH. WIND SPEED & DIRECTION CAN BE DETERMINED BY TRACKING RADIOSONDE.

Technical

AN EXAMPLE OF A LATE 1980S-EARLY 1990S STYLE OF RADIOSONDE, CONTROLLED BY A BAROSWITCH WHICH HAS AN ANEROID SENSOR & ALSO SWITCHES IN THE CERAMIC ROD THERMISTOR & ELECTROLYTIC PLASTIC STRIP HYGRISTOR, & REFERENCE RESISTORS. THE RADIOSONDE APPEARS VERY LITTLE CHANGED FROM THOSE OF THE 1970S & 1980S. VALCOM BUILT THE VIZ RADIOSONDE IN GUELPH, ONTARIO UNDER CONTRACT FROM VIZ MFG. CO. OF PHILADELPHIA, PA. AN OUT OF PRINT 1993 WORLD METEOROLOGICAL ORGANIZATION REPORT BY D.J. GAFFEN DOCUMENTS THE HISTORY OF RADIOSONDES USED AROUND THE WORLD, INCLUDING A DETAILED REPORT FROM CANADA (REFS. 3& 4)

Area Notes

Unknown

Details

Markings

BLUE LETTERING ON FRONT READS 'A/ VIZ/ PRODUCT/ MANUFACTURED BY/ Valcom LTD./ GUELPH, ONTARIO, CANADA'/ WHITE LABEL ON SIDE PRINTED IN BLUE READS 'RTP 88-012-059'/ WHITE & BLUE LABEL ON SIDE READS 'VIZ ACCU-LOK/ TEMPERATURE SENSOR/ Lock-in value at +30 Degrees Celsius/ DG 13702 OHMS 73.83 R.D./ CAUTION/ The R.D. Lock-in value is only applicable/ when used with ACCU-LOK radiosondes./ LOT 2363/ VIZ Manufacturing Co., Philadelphia, PA 19144 U.S.A.'/ BLUE LETTERING ON BACK READS 'Manufactured in Canada under License from/ VIZ Manufacturing Co., Phila., Pa., USA'/ BLUE PRINTED FRENCH & ENGLISH INSTRUCTIONS TO FINDER

Missing

APPEARS COMPLETE. HYGRISTORS WERE SUPPLIED SEPARATELY BY MFR. & USED WITH RADIOSONDES AS REQUIRED. THIS HYGRISTOR WAS ASSIGNED TO 940140 AT NMST.

Finish

WHITE CASING/ WHITE CORD/ MULTICOLOURED SYNTHETIC/ METALLIC PARTS

Decoration

MOULDED LETTERING ON TOP READS 'ATMOSPHERIC/ ENVIRONMENT SERVICE/ CANADA/ RADIOSONDE'/ TYPED LABEL ON CAN READS 'VIZ HUMIDITY SENSOR/ 1286-162 ACCU-LOK/ LOT: 3706 AUG 91/ LOCK-IN; 13532 74.20 RD/ CALIBRATED AT 33% RH 25C'