Ashcroft 1305D Specifications

Type 1305D Deadweight Tester

PPLICATION

A

• For calibration and test applications
requiring a primary standard

FEATURES

• Accuracy: 0.1% of reading

• Operating Pressure: 15 psi to 10,000 psi

• Operating Media:

- 1305D: SAE 20 weight automotive or

machine oil

- 1305DH: Phosphate-based or glycol

fluids

The Ashcroft 1305D Deadweight Tester is an
affordable, portable primary pressure stan­dard, specifically designed for the precise cali­bration of in dust rial service gauges and trans­ducers. Accurate to 0.1% of reading, each
dead weight tester is carefully calibrated and
certified traceable to the National Institute of
Standards and Technology (NIST).

The 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 optionally avail­able with special seals suitable for these media.

In addition, each set 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.

The 1305D offers a rugged field ready pri­mary standard, certified to yield consistent,
accurate results.

PECIFICATIONS – 1305D

S

Accuracy: Within 0.1% of produced pressure

Operating
Pressure: 15 psi to 10,000 psi maximum

Reservoir
Volume: Approximately 1.5 pints (0.7 liter)

Pump Body
Material: Aluminum alloy

Piston and
Cylinder
Material: Piston: 440C Stainless Steel

Operating
Fluid: 1305D – SAE 20 automotive or

Weight
Material: Non-magnetic die cast zinc alloy,

O-Ring Seals: Standard (1305D) – Buna-N

Accessories: Metal carrying and storage boxes

Certification: Standard: NIST traceability document

Carrying Case
Dimensions: 10 x 10 x 22 (inches)

Weight Box
Dimensions*: 9 x 9 x 8.5 (inches)

*Two boxes required for type 1305D-100,

all others require one box

(adjusted for standard gravity condi­tions; compensation for local gravity
effects may be required)

Cylinder: 416 Stainless Steel

machine oil
1305DH – Phosphate or glycol base
hydraulic fluids, (Monsanto Skydrol
500B-4 or equal)
Note: Not for use with water medium.
For oxygen service applications, refer
to models 1327DO or 1327CMO.

ASTM AC41A

Optional (1305DH) – Ethylene
Propylene

Lower connection offset pipe assem­bly
Back connection pipe

1

1

⁄

4 &

⁄

2 NPT Female adapters

Wrenches (1˝x11⁄
Pointer puller set
Installation and Operation Manual
Spare O-ring kit

provided with each unit.

8˝), (

1

⁄

4˝x1˝), (

5

⁄

8˝)

BULLETIN TE-1 (1305D)

All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© 2016 Ashcroft Inc. 01/ 16

Ashcroft Inc., 250 East Main Street, S tratford, CT 06 614 USA
Tel: [phone] • Fax: [phone]
email: [e-mail] • www.as hcro ft .com

2

0

1

/8˝

±

1

/8˝

(511 ±3mm)

2

0

3

/4˝

±

1

/8˝

(527 ±3mm)

5

/16˝ (7.94)

4

Holes

9

/32˝

(7.14)

2˝ (51)

Offset 5˝

(

127)

17

1

/2˝

(445)

11˝ (280)

7

1

/2˝

(190)

2

3

/8˝ (60)

For back

conn. gauge

133/4˝

(350)

For

lower
conn.
gauge

Type 1305D Deadweight Tester

MODEL PISTON ASSEMBLY PISTON

NUMBER PRESSURE RANGE VALUE NET WEIGHT

psi Type Low High Low High

H-25 H-50 H-100 H-200 H-500

UMBERS OF WEIGHTS BY VALUE

N

L-5 L-10 L-20 L-40 L-100

APPROX.

lbs. kg.

1305D-10 15/200 75/1000 5 25 1 3 2 3 – 60 27
1305D-20 15/400 75/2000 5 25 1 3 2 3 2 70 32
1305D-30 15/600 75/3000 5 25 1 3 2 3 4 85 39
1305D-50 15/1000 75/5000 5 25 1 3 2 3 8 105 48
1305D-100 15/2000 75/10,000 5 25 1 3 2 3 18 175 80

BULLETIN TE-1 (1305D)

All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© 2016 Ashcroft Inc. 01/ 16

Ashcroft Inc., 250 East Main Street, S tratford, CT 06 614 USA
Tel: [phone] • Fax: [phone]
email: [e-mail] • www.as hcro ft .com