Ashcroft 1305DH-20 Руководство по установке и обслуживанию - Страница 6

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Pressure values produced by the pump are able to be

clearly read to within ±0.25% accuracy of the span of the

precision test gauge selected for testing. Certification of

test gauge accuracy traceable to the N.I.S.T., is available

upon request. A hand jack set, three wrenches, spare

O-rings, and special adapter for making connections to

pressure outlets that do not accommodate cone pipe seat-

ing, are included with each unit.

Test pump accessories include lower and back connection

offset pipe assemblies, with pipe adapters for

NPT connections.

An all metal, double-latched, top handle carrying case is

supplied with the complete tester to hold all fittings and

attachments.

2.2.2 Theory of Operation – 1327D

The operating principle behind the 1327D Test Pump is

a simple form of comparison. Pressure produced by the

pump is equally distributed by the manifold to a test gauge

and to a device being calibrated or checked. The reading

of the test gauge serves as the reference to which other

device readings are compared against.

Selection of the test gauge range is the determining factor

in establishing the precision to which a comparison check

is to be made. Test gauge accuracy is expressed as a per-

centage of its span.

Proper selection of the test gauge range must be made

to minimize the amount of the unit error. If a 5,000 psi

(35,000kPa) range test gauge were used to test devices

whose span values were less than a fourth of the test

gauge range, the unit error of 12.5 psi (87kPa) would be

greater than 1% of the test pressure. Therefore, it is im-

portant to select a test gauge that has a full scale range

equal to or only slightly in excess of the pressure value to

be measured.

2.2.3 Specifications – 1327D

Accuracy:

⁄

% of 1% of test gauge span.

Test Gauges: Ashcroft solid front type 45-1082-02L-XAZ,

⁄

˝ dial size (120mm case). Bourdon tube materials for

1327D and DH are bronze and Monel. Bourdon tube ma-

terials for 1327DO are bronze and Monel.

Pump: Two stage, lever operated generates 10,000 psi

(70,000kPa) with 28 pounds (12.7kg) of force on lever

handle.

Pump Body: Aluminum, corrosion inhibited and coated

with baked blue epoxy finish.

Shuttle Valve: Stainless steel bypass valve that controls

rate of pressure increase and reduces operator effort

when working at high pressure.

Displacement Valve: A fine pitched threaded valve road

permitting vernier adjustments to fluid volume to provide

precise changes. Limit stops prevent road removal during

normal operation.

Mounting: Four bench mounting holes located in base for

positive mounting to any level surface.

Instrument Connections: Two coned pipe assemblies

provide vertical calibration capability for back and lower

connected gauges. Standard

inch internal NPT fitting adapters are supplied.

Operating Fluid: 1327D – Light grade machine oils, au-

tomotive petroleum base SAE 20 oils or other equivalent

fluids suitable for use with Buna N O-ring materials. 1.5

pints required (.7 liters).

⁄

and

⁄

inch internal NPT and

⁄

1327DH – Most hydraulic oils of phosphate ester base,

brake fluids, skydrol, pydraul etc., suitable for use with

Butyl or Ethylene-Propylene O-ring materials. 1.5 pints

required (.7 liters).

1327DO – Distilled water with compatible corrosion in-

hibitor. A .1% solution of sodium dichromate is a suitable

inhibitor. 1.5 pints required (.7 liters).

2.2.4 Certification:

Standard – Master gauges are calibrated on traceable

standards, no certification documentation provided.

Optional (CD-4) – Traceable calibration certificate for

each master gauge.

3.0

SETTING UP THE TESTER

3.1

Inspection

3.1.1

Component Check 1305D

The deadweight tester, as shipped from the factory,

contains all of the components necessary for operation

except pump fluid. Depending upon the model and pres-

sure range selected, the total number of weights, weight

boxes and piston and cylinder assemblies will vary. Refer

to Specifications, Section 2.1, Table 2-1 for model clarifi-

cation.

3.1.2 Component Check 1327D

The portable test pump, as shipped from the factory, con-

tains all of the components necessary for operation except

pump fluid. Depending upon the model and pressure

range selected, the total number and their ranges will vary.

Refer to Specifications , Section 2.2, Table 2-3 for model

clarification.

3.1.3 Claim for Missing or Damaged Goods

In the event it is determined that an item is missing or

damaged, contact Customer Service immediately at the

address indicated in Section 1.0. Damaged merchandise

and the packaging materials must be held for inspection

by authorized Ashcroft Inc. personnel or the responsible

carrier. Disposition of damaged or missing goods will be

determined after inspection has been performed on loca-

tion, or at the discretion of the manufacturer, at the factory.

Inspection may be waived if circumstances, as judged by

the manufacturer, preclude its necessity.

3.2 Installation Type 1305D

3.2.1 Set-up Procedure (See Figure 2-1)

To remove the tester from the case, release the spring

clip, depressing the clip by hand, grasp the pump reservoir

and lift up the back end of the pump assembly.

Having removed the pump assembly from its carrying

case, remove the two plastic shipping plugs.

Select a lower connection (64) or back connection (66) off-

set pipe and connect to inner pump body outlet as shown

in Fig. 2-1.

Remove the reservoir filler plug (35) and fill reservoir with

operating fluid.

3.2.2 Bench Space Required (See Figure 1-1)

Allow a space:

10 inches (25.4 cm) width

27 inches (68.6 cm) depth

22 inches (55.9 cm) height – allows for maximum load of

deadweights

3.2.3 Storage Space Required

One Tester Box:

⁄

inch (2.6 cm); 22

cm) height

of 20

⁄

inch (57 cm) depth; 10 inch (25