Part Details | DIGITAL HYGROTHERMOMETER
6685-01-382-4699 An instrument for measuring and indicating by digital display relative humidity and temperature of the surrounding atmosphere. Measurements are made by sensors generally mounted in a probe.
Alternate Parts: MODEL 989M, DP989M, 6685-01-382-4699, 01-382-4699, 6685013824699, 013824699
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | NOV 03, 1993 | 01-382-4699 | 38844 ( HYGROTHERMOMETER, DIGITAL ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 6685-01-382-4699
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| MODEL 989M | 0WST2 | PROTIMETER INC |
| DP989M | 0WST2 | PROTIMETER INC |
Technical Data | NSN 6685-01-382-4699
| Characteristic | Specifications |
|---|---|
| MEASUREMENT TYPE | DIGITAL |
| OPERATING TEMP RANGE | -20.0 TO +60.0 DEG CELSIUS |
| MEASUREMENT RANGE | +10.0 TO +100.0 PERCENT RELATIVE HUMIDITY |
| SPECIAL FEATURES | SYSTEM CONSISTS OF A HUMIDITY/TEMP INDICATOR W/DIGITAL DISPLAY AND HUMIDITY/TEMP PROBE; PROBE CONNECTED TO DISPLAY BY WIRE; DEW POINT TEMP 0 DEG C TO 40 DEG C BELOW AMBIENT TEMP;OUTPUTS: DEWPOINT TEMP 0 TO 1 VOLT FOR -40 TO 60 DEG C, AMBIENT TEMP 0 TO 1 VOLT FOR -40 TO 60 DEG C, RELATIVE HUMIDITY 0 TO 1 VOLT FOR 0 TO 100 PERCENT RH;MEASUREMENT OF AIR DEWPOINT ACHIEVED BY OPTO-ELECTRONIC DETECTION OF DEW FORMED ON AN ELECTRICALLY COOLED, SOLID GOLD MIRROR, THE TEMP OF MIRROR IS CONTINUALLY MONITORED AND WHEN DEW FORMS THE TEMP IS STORED IN MEMORY; PROBE HOUSES THE DEW FORMING MIRROR AND OPTICS, ALSO CARRIES ANOTHER TRANSDUCER FOR MEASURING AMBIENT TEMP; OPERATES AND DISPLAYS CONTINUOUSLY WHILE CYCLING THROUGH DEWPOINT DETERMINATION EVERY 1/2 TO 2 MINUTES;ITEM WILL BE USED TO MAINTAIN ACCURACY OF THE FOLLOWING SYSTEMS-T.O. 33K6-4-2024-1, P/N 31061222-001, T.O. 33K5-4-84-1 P/N'S CT428-7, RH200, HTAB176 |
| SCALE ACCURACY RATING | HUMIDITY ACCURACY +/- 2 PERCENT RH, TEMP ACCURACY +/- 0.4 DEG F |
| FUNCTIONAL DESCRIPTION | THE PROTIMETER DEWPOINT METER USES ANALOG AND DIGITAL ELECTRONICS TO SIMPLIFY ACCURATE AND STABLE HYGROMETRIC MEASUREMENT; DIRECT MEASUREMENT OF DEWPOINT TEMPERATURE |
| RELATIONSHIP TO SIMILAR EQUIPMENT | REPLACES THE AIR FORCE'S CURRENT TEMP AND HUMIDITY TRANSFER STANDARDS USED IN PMEL, P/N SA-760-A NSN 6625-01-144-1855 DIGITAL READOUT AND P/N H5-3552-B (NSL) HUMIDITY PROBE |
| REFERENCE DATA AND LITERATURE | T.O. 33K1-1-100 |