The Ashcroft 1305D deadweight tester is an affordable, portable primary pressure standard, specifically designed for the
precise calibration of industrial service gauges and transducers. Accurate to 0.1% of reading, the 1305D is carefully
calibrated and certified traceable to the National Institute of Standards and Technology (NIST).
The Ashcroft 1305D is a dual-range system which provides a “high” and a “low” pressure piston assembly and a complete set
of weights labeled with corresponding high and low pressure values. Each system includes a 2-speed lever action hydraulic
pressure pump capable of achieving pressures up to 10,000 psi. By repositioning a shuttle valve, the operator can select
between 2 different rates of pressure generation, thereby reducing the effort necessary to develop higher pressures. To
fine tune the pressure output to a specific calibration point, the pump is equipped with a secondary micro-adjust vernier
displacement valve.
The standard 1305D pump is designed to operate with 20 weight petroleum based motor or machine oil. For applications requiring
the use of glycol or phosphate ester based hydraulic fluids, the pump is available with special seals suitable for these media.
The 1305D includes a NIST traceable calibration certificate as standard. An optional certificate of accuracy is available which
includes weight values for weights and pistons, piston diameter values, environmental data and NIST Test Numbers. Also included
are numbered weights.
The Ashcroft 1305D deadweight tester includes the tools, adapters, and accessories necessary to accommodate most field or lab
calibration requirements. All of the components are conveniently stored in a metal tool box for maximum protection and portability.
Weight sets are also protected in separate metal storage boxes.
| Ashcroft 1305D deadweight tester specifications: | ||
|---|---|---|
| Pressure ranges | Model 1305D-10 | 15-200 psig (low); 75-1000 psig (high) |
| Model 1305D-20 | 15-400 psig (low); 75-2000 psig (high) | |
| Model 1305D-30 | 15-600 psig (low); 75-3000 psig (high) | |
| Model 1305D-50 | 15-1000 psig (low); 75-5000 psig (high) | |
| Model 1305D-100 | 15-2000 psig (low); 75-10,000 psig (high) | |
| Accuracy | 0.1% of reading (all ranges) | |
| Operating media | 1305D: SAE 20 weight automotive or machine oil | |
| 1305DH: Phosphate-based or glycol fluids | ||
| O-ring material | 1305D: Buna-N | |
| 1305DH: Ethylene Propylene | ||
| Materials | Piston and cylinder: stainless steel | |
| Weights: non-magnetic die cast zinc | ||
| Reservoir volume | Approximately 1.5 pints (0.7 liter) | |
