Fluke 718 30G User manual

®
718 30G/100G
Pressure Calibrator
Users Manual
July 1998 Rev. 2, 1/01
© 1998, 2000, 2001 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

i
Table of Contents
Title Page
Introduction....................................................................................................................1
Safety Information......................................................................................................... 2
Getting Acquainted with the Calibrator.......................................................................... 6
Zeroing with Absolute Pressure Modules...................................................................... 8
Calibrating a P/I Transmitter.......................................................................................... 9
Using the Internal Pump........................................................................................... 9
Using an External Pump........................................................................................... 14
External Fluke Pressure Module Compatibility.............................................................. 16
Sourcing Loop Voltage.................................................................................................. 17
Maintenance.................................................................................................................. 17
In Case of Difficulty................................................................................................... 18
Cleaning ................................................................................................................... 18
Calibration ................................................................................................................ 18
Replacing the Batteries ............................................................................................ 19
Replacing the Fuse................................................................................................... 20
Parts and Accessories................................................................................................... 21
Specifications................................................................................................................ 24

718 30G/100G
Users Manual
ii
Pressure Sensor Input, 718 30G............................................................................... 24
Pressure Sensor Input, 718 100G............................................................................. 24
Pressure Module Input, 718 30G and 718 100G ...................................................... 24
DC mA Input, 718 30G and 718 100G...................................................................... 24
Loop Supply 718 30G and 718 100G........................................................................ 24
General Specifications.............................................................................................. 25
How to Contact Fluke..................................................................................................... 26

iii
List of Tables
Table Title Page
1. Pressure Sensor Range and Resolution............................................................................ 2
2. Safety Information.............................................................................................................. 3
3. International Electrical Symbols......................................................................................... 5
4. Pushbutton Functions ........................................................................................................ 7
5. Pump Features................................................................................................................... 9
6. Recommended Pressure Modules..................................................................................... 13
7. Fluke Pressure Module Compatibility................................................................................. 16
8. Replacement Parts.............................................................................................................21

718 30G/100G
Users Manual
iv

v
List of Figures
Figure Title Page
1. Connection Technique....................................................................................................... 5
2. Front Panel Features ......................................................................................................... 6
3. Pump Features................................................................................................................... 8
4. Internal Pressure Sensor with Internal Pump..................................................................... 11
5. Pressure Module with Internal Pump................................................................................. 12
6. Pressure Module with External Pump................................................................................ 15
7. Sourcing Loop Voltage....................................................................................................... 17
8. Battery Replacement.......................................................................................................... 19
9. Fuse Replacement............................................................................................................. 20
10. Replacement Parts............................................................................................................. 23

718 30G/100G
Users Manual
vi

1
Pressure Calibrator
Introduction
The Fluke Model 718 30G and 718 100G Pressure
Calibrators (hereafter called “Calibrator”) can do the
following:
•Calibrate P/I (pressure to current) transmitters.
•Measure pressure via a 1/8-inch NPT pressure fitting
and an internal pressure sensor or via a Fluke 700
Series Pressure Module.
•Measure current up to 24 mA.
•Simultaneously display pressure and current
measurements.
•Supply loop voltage.
The Calibrator makes 5-digit pressure readings in the
following units: psi, inH2O at 4 °C, inH2O at 20 °C, kPa,
cmH2O at 4 °C, cmH2O at 20 °C, bar, mbar, kg/cm2, inHg,
and mmHg. Full scale pressure sensor input is as follows:
•Model 718 30G: 30 psi (206.85 kPa, 2.0685 bar).
“OL” appears at 33 psi.
•Model 718 100G: 100 psi (689.5 kPa, 6.895 bar).
“OL” appears at 120 psi.
The Calibrator measures pressure sensor inputs in the
units shown in Table 1.
For Pressure Modules, full scale readings for all pressure
ranges can be made in psi, kPa, and inHg units. To avoid
display overflow, full scale readings are limited to 1000 psi
in cmH2O, mbar, and mmHg units, and 3000 psi in inH2O
units. Pressures of at least 15 psi must be measured for
meaningful readings in bar and kg/cm2units.
Your Calibrator is supplied with a holster, two installed 9 V
alkaline batteries, one set of TL75 test leads, one set of
AC70A alligator clips, and this manual.
If the Calibrator is damaged or something is missing,
contact the place of purchase immediately. Contact your
Fluke distributor for information about accessories. See
“How to Contact Fluke.” To order replacement parts or
spares, see “Parts and Accessories.”

718 30G/100G
Users Manual
2
Table 1. Pressure Sensor Range and Resolution
Displayed
Pressure
Units
Model 718 30G Range
and Resolution Model 718 100G Range and
Resolution
psi -12.000 to 30.000 psi -12.00 to 100.00 psi
inH2O at
4°C-332.16 to 830.40 inH2O-332.2 to 2768.0
inH2O
inH2O at
20°C-332.75 to 831.87 inH2O-332.8 to 2772.9
inH2O
cmH2O at
4°C-843.6 to 2109.0 cmH2O-843.6 to 7030.0
cmH2O
cmH2O at
20°C-845.2 to 2113.0 cmH2O-845.2 to 7043.0
cmH2O
bar -0.8274 to 2.0685 bar -0.8274 to 6.8950 bar
mbar -827.4 to 2068.5 mbar -827.4 to 6895.0 mbar
kPa -82.74 to 206.85 kPa -82.74 to 689.50 kPa
inHg -24.432 to 61.080 inHg -24.43 to 203.60 inHg
mmHg -620.6 to 1551.4
mmHg -620.6 to 5171.5 mmHg
kg/cm2-0.8437 to 2.1090
kg/cm2-0.8437 to 7.0306 kg/cm2
Safety Information
Use the Calibrator only as specified in this instruction
sheet, otherwise the protection provided by the Calibrator
may be impaired.
A Warning identifies conditions and actions that pose
hazard(s) to the user; a Caution identifies conditions and
actions that may damage the Calibrator or the equipment
under test.