General Tools PM930SD User Manual

PM930SD

USER’S MANUAL

LIQUID OR AIR

PRESSURE METER

WITH DATALOGGING SD CARD

Please read this manual carefully and thoroughly before using this product.

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . 4 –9

What’s in the case . . . . . . . . . . . . . . . . . . . . 4 –5

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 –7

Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . 7

Holding and Storing Measurements. . . . . . . . . . 8

Automatic vs. Manual Datalogging . . . . . . . 8 –9

Transferring Data from the SD Card

to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Maintenance & Troubleshooting Tips . . . . . . . . . . . . 10

Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . 11

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . 11

Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . 11

2

INTRODUCTION

Thank you for purchasing General Tools & Instruments’ PM930SD Liquid or Air Pressure
Meter with Datalogging SD Card. Please read this user’s manual carefully and thoroughly
before using the instrument.

The PM930SD is a general purpose handheld instrument suitable for measuring pneumatic
and hydraulic pressures in automotive, mechanical engineering, HVAC/R (heating,
ventilation, air-conditioning, and refrigeration) and food-processing environments.

The PM930SD has the performance and features needed to satisfy the most demanding
aspects of the above applications. It works with any of eight optional pressure sensors,
each with a different full-scale range (2, 5, 10, 20, 50, 100, 200 and 400 bar). A front-panel
pushbutton enables rapid switching among sensors with no need for precalibration. Another
front-panel pushbutton facilitates fast switching among the following 10 commonly used
pressure units: Bar, psi, kg/cm
hectopascals (hPA) and kilopascals (kPA ).

Because it is microprocessor-based, the PM930SD can make full use of the portability,
reliability and large storage capacities that SD memory cards offer. Pressure measurements
can be made automatically at any sampling rate between one second and nine hours. After
time-stamping and storing the measurements on an SD card plugged into the instrument (a
process called datalogging), the user can remove the card and plug it into to a laptop or
desktop computer either directly or via a USB card reader. The data logs are stored on the
card as files with the .xls extension, which can be opened by Microsoft’s Excel application.

The PM930SD has a backlit 2-1/2 in. diagonal display and is powered by six “AA” Alkaline
batteries or an optional 9-VDC AC adapter.

2

, mm Hg, inches Hg, meters H2O, inches H2O, atmospheres,

KEY FEATURES

• Measures hydraulic or pneumatic pressure using optional sensors
with full-scale ranges from 2 to 400 bar

• Sensors calibrated by single push of a button

• Ten different pressure units selectable via front panel

• Displays maximum and minimum readings

• Performs real-time automatic datalogging at sampling time settable from
1 second to 9 hours

• Also supports manual logging and changing of card storage location

• Outputs Excel-compatible data logs

• Accepts SD memory cards of up to 16 GB capacity

• Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read

• Auto power off function

• Powered by six “AA” batteries or optional 9V AC/DC adapter

3

OPERATING INSTRUCTIONS

WHAT’S IN THE CASE

The PM930SD comes fully assembled in a carrying case along a 2 GB SD memory card
with this user’s manual.

Optional accessories available from General Tools & Instruments include eight optional
pressure sensors, each with a different full-scale range (2, 5, 10, 20, 50, 100, 200 and
400 bar) and a 9VDC adapter for a 110V power supply. See the Optional Accessories
section of this manual for more details.

Figure 1 shows all of the controls and indicators on the front, back, top, bottom and right
side of the PM930SD. It also shows the main components of an optional pressure sensor.
Familiarize yourself with the positions and functions of these controls, indicators and ports
before moving on to the setup procedure.

FRONT

RIGHT

SIDE

TOP

BOTTOM

Fig. 1. The PM930SD’s controls and indicators and other physical features

4

BACK