Time-electronics 7090 Pneumatic Calibration Hand Pump Manuel d'utilisateur télécharger pdf (Page 2)

7090 User Manual 2

1. Introduction

The 7090 pneumatic calibration hand pump is designed for ease of use to provide a source

of both pressure and vacuum for checking the calibration of gauges, pressure switches,

transmitters and recorders. The large comfortable handles with grips moulded into the

design make it easy to control the pump whilst pumping up to pressure. The dual o-rings on

all pistons ensure leak free operation.

Specification

Output Range: -0.95 to 40 bar ( -13.78 to +600 psi).

Media: Air and compatible gases only.

Gauge Port: ¼” BSP with ¼” NPT adaptor fitted.

Process (UUT) Port: 1/8” BSP with 1/8” NPT adaptor and plug fitted.

Materials: Stainless steel fittings, anodized aluminium housing,

plastic/rubber handles, nitrile o-rings.

Weight: 0.91kg.

• 7090 hand pump

Contents

• 1 meter of 6/4mm hose

• Selection of 5 fittings

• Carry case

• Manual

2. Operational Notes

1 Ensure all units under test are disconnected from process pressures before connecting

the pump.

2 Do not exceed the maximum pressure rating; this is 41 bar (600 psi).

3 The 7090 is supplied with ¼” and 1/8” BSP ports. For use with NPT fittings the supplied

adaptors must be fitted.

4 Use only bonded washers to seal the male adaptors/fittings. Screw down hand tight, and

then fully tighten with a spanner. Do not over-tighten, this could strip thread. PTFE tape

or thread sealant may be used with female adaptors.

5 The 7090 uses a Schrader valve to vent. This means that the vent valve is fully open or

closed several turns from the end of travel. Over tightening does not increase the

effectiveness of the seal.

6 Do not use with liquids.

All Time Electronics' instruments are subject to continuous development and improvement and in

consequence may incorporate minor detail changes from the information contained herein.

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Time-electronics 7090 Pneumatic Calibration Hand Pump Manuel d'utilisateur Page 2