See the below link to a pdf file that provides instructions to use NPT adapter kit part number 3466392. It is most often ordered with E-DWT pressure calibrators.
Part Number: 3466392
Description: PK-ADPTR-DH500/NPT,ADAPTOR KIT, DH500 TO 1/8, 1/4, 1/2 NPT FEMALE
Includes these parts:
| Part Num | Qty | Description |
| 3068887 | 1 | NPPL-103974,NIPPLE, 2.75 IN, DH500 (500M) |
| 3068607 | 2 | CLLR-101201,COLLAR, DH500/DH700 (700M) |
| 3068419 | 2 | GLND-100271,GLAND, DH500 (400M) |
| 3887892 | 1 | ADAPTER,1/4 IN. HIGH PRESSURE FEMALE TO 1/8 IN. NPT FEMALE |
| 3068797 | 1 | ADPTR-102820,ADAPTOR, DH500F X 1/4 IN NPTF |
| 3469956 | 1 | ADAPTER,REDUCING,STAINLESS STEEL,1/2 IN NPT FEMALE X 1/4 IN NPT MALE |
It does not include fittings to connect to P3100 or P3200 deadweight testers or P5500 comparators (or accessories for them like separators, angle adapters, two gauge stand). For these products with left-hand TEST ports, the adapter kit in this article should be used,
Adapters, Deadweight tester TEST port adapters
Fluke Calibration Pressure Technical Support can be contacted at the below link or by calling +1.877.355.3225