Fluke PV350 Operating Manual

PV350

Pressure/ Vacuum Transducer Module

Instruction Sheet

ETRIC

M

PV350

ENGLISH ZE

PRESSU

cmHg

kPa

OFF

RE / VACUUM MOD

inHg

psi

ULE

®

Introduction

The PV350 Pressure/Vacuum Transducer Module (the module)
measures gauge pressure; the difference between atmospheric
(barometric) pressure and the pressure (or vacuum) applied to the
pressure port on the transducer. It then converts that measurement to
1 mV dc per unit. A module and a high-performance digital multimeter
(DMM) with min/max function become a datalogger capable of measuring
peak high and peak low.

Box Contents

• Pressure/Vacuum Transducer Module

• 1/4 in. male flare to 1/4 in. female pipe thread connector

• 9 V alkaline battery

• Instruction Sheet

• Quick Reference Guide

Safety Information

Warning

To avoid eye injury, always wear approved safety glasses
when working with this instrument.

To avoid injury from pressure explosion:

• Be sure that pressure is removed before

disconnecting any hoses or tubing from the PV350
transducer.

• Follow accepted safety procedures for systems on

which pressure or vacuum measurements are made.

• Make sure the PV350 is serviced by a qualified

technician.

PN 926873 May 1992 Rev. 6, 5/15

© 1999-2015 Fluke Corporation, All rights reserved.
All product names are trademarks of their respective companies.



• To ensure that the module is used safely, follow all

safety and operating instructions in this Instruction
Sheet. If the module is not used as described in this
Instruction Sheet, the safety features of the module
might be impaired.

• Do not use the module if the module or fittings look

damaged, or if you suspect that the module is not
operating properly.

•  This symbol on the module indicates that an

operator should refer to an explanation in the
instruction sheet.

• Follow accepted safety procedures for the systems on

which pressure or vacuum measurements are being
made.

Materials Compatibility

The PV350 is compatible with industrial gases and liquids that are
compatible with 316 stainless steel. To determine the compatibility of a
liquid or gas, refer to the manufacturer's specifications. When making
measurements on more than one type of pressure system, make sure the
fluids or gases in those systems are compatible. If they are not,
contamination or damage to the system being measured may result.

Cleaning

Clean the module using a soft cloth and mild soap and water. Do not
immerse the PV350 in liquids.

Clean the transducer and connectors after each use with a cleaner
appropriate for the liquid or gas connected during measurement. Refer to
the manufacturer’s instructions for the proper cleaning material.

Measuring Pressure and Vacuum

Caution

The sensor diaphragm can be damaged by solid or sharp
objects. Never insert any object into the inlet port.

Clean the sensor immediately after use with appropriate
solvents (refer to the solvent manufacturer's instructions).

Note

Fluke recommends that Teflon sealing tape (or its equivalent)
be used in fitting threads to ensure good seals between the
PV350 and any hoses or fittings.

1. Plug the PV350 into the DMM (red polarity dot to volts input) and set
the multimeter to mV dc.

2. Check the battery voltage (see Testing the Battery).

3. Press the English/Metric button to select the desired units.

4. Slide the switch to the desired setting.

5. Before applying pressure, zero the module by turning the ZERO
potentiometer until the DMM displays zero. (Zero on the range you
will be using and rezero the DMM whenever the scale is changed.)

To

pressure/vacuum

input

TRUE RMS MULTIMETER

87

MIN MAX

mV

H

D
L

O

H

RANGE

z

H

L

E

R

X

A

M

IN

M

K

A

E

P

A

m

A

V

m

A

μ

V

V

F

F

O

A

Module

E

L
U
D

O

M
N
M

U

C
A
V

E

R
U
S

V

S

E
I

C

R
R
T

P

E
M

I

C

g

R
T

E

H

M

M

n

O

C

A A

m

400mA
FUS

X

A MA

10

FUSED

E

i

i

.

s

K

g

p

.

H

F

U

a

F

L

m

P

c

PV350

O

F

k

ED

!

Sensor

Figure 1. Operation

Note

The Relative or Zero function on your DMM (if available) can
be used instead of the ZERO potentiometer to zero the meter.
Refer to the multimeter's user manual for instructions on using
this function. Zeroing the meter does not affect the module's
specified accuracy.

6. Apply pressure/vacuum to the PV350 and read the DMM display.

• When measuring pressure, if the DMM displays OL,

switch the multimeter range from millivolts to dc volts.
Increasing the range to dc volts moves the decimal
position three places to the left (500 psi displays as

0.500 V).

• When measuring vacuum the DMM displays a minus sign.

Testing the Battery

1. Turn the DMM and the module OFF and connect the PV350 to the
DMM.

2. Turn the DMM on and set the DMM to the mV dc range.

3. If the DMM displays less than 100 mV, replace the battery.

How to Replace the Battery

Warning

To avoid electrical shock, disconnect the module from all
devices before opening the case. Be sure to completely
reassemble the module before attempting to use it.

Battery

Figure 2. Battery Replacement

1. Turn the module OFF and unplug it from the DMM.

2. Remove the screw from the back of the module, separate the case,
and replace the battery.

3. To reassemble, line up the holes in the case with the
METRIC/ENGLISH switch and zero knob. Then snap the two halves
together. Reinstall the screw.

Typical Applications

Refer to Figures 3 and 4 for typical applications.

AUTOMOTIVE TESTER

88

DC

mV

20 2

46

3

82468

4

4000

mV

H

MIN MAX RANGE HOLD

ZERO

RPM

% DUTY

ALERT

_

+

Hz

SMOOTH

ms-PULSE

TRIGGER

mV

mA

V

A

RPM

mA

V

A

OFF

V

mA A

COM

RPM

A

400mA MAX

FUSED

10A MAX

1000V MAX

FUSED

!

IC

R

T

E

M

Z
H

IS

L

G

N

E

P

V

5

0

0

P

R

E

S

S

U

R

E

/

V

A

C

U

U

M

M

O

D

U

L

E

inHg

cmHg

psi

kPa

OFF

Figure 3. Pressure for HVAC/R Super Heat Measurements

AUTOMOTIVE TESTER

88

RANGE

DC

mV

20 2

46

3

82468

4

4000

mV

H

MIN MAX RANGE HOLD

ZERO

RPM

% DUTY

ALERT

_

+

Hz

SMOOTH

ms-PULSE

TRIGGER

mV

mA

V

A

RPM

mA

V

A

OFF

V

mA A

COM

RPM

A

400mA MAX

FUSED

10A MAX

1000V MAX

FUSED

!

IC

R

T

E

M

H

IS

L

G

N

E

P

V

5

0

0

P

R

E

S

S

U

inHg

cmHg

psi

kPa

OFF

Figure 4. Measure Pneumatic Pressures

Z

R

E

/

V

A

C

U

U

M

M

O

D

U

L

E

Conversion Factors

psi = inches of H2O x (3.6127 x 10-2) inches of H2O = psi x 27.68
psi = mm of H2O x (1.4223 x 10-3) mm of H2O = psi x 703.1
psi = cm of H2O x (14.223 x 10-3) cm of H2O = psi x 70.3
psi = bar x (14.503) bar = psi x 0.0689
psi = lbs/ft2 x (6.9444 x 10-3) lbs/ft2 = psi x 144
psi = mbar x (1.4503 x 10-2) mbar = psi x (68.9513)

psi = Pascals x (1.4503 x 10-4) Pascals = psi x (6.895 x 103)
All H2O conversion factors are @ 4°C

Specifications

The following specifications apply at 23 ±5 °C for 1 year after calibration
when the module is zeroed prior to each measurement.

Pressure

Range Accuracy

0 psi to 500 psi:
(0 kPa to 3447 kPa)

Range Accuracy

0 in-Hg to -29 in-Hg
(0 cm-Hg to -76 cm-Hg)

Temperature coefficient: Add 0.05 % of reading per °C for temperature
ranges -10 °C to 18 °C and 28 °C to 55 °C.

Output: 1 mV per unit (psi, kPa, cm-Hg or in-Hg)
Resolution: Determined by the resolution of the measuring device.
RFI Specification: Typically <1 % error from 80 to 200 MHz at 3 V/m.
Electromagnetic Compatibility (EMC)

International IEC 61326-1: Portable; IEC 61326-2-2; CISPR 11: Group 1,
Class A

Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary for the
internal function of the equipment itself.

Class A: Equipment is suitable for use in all establishments other than
domestic and those directly connected to a low-voltage power supply
network that supplies buildings used for domestic purposes.

Korea (KCC) Class A Equipment (Industrial Broadcasting &
Communication Equipment)

Class A: Equipment meets requirements for industrial electromagnetic
wave equipment and the seller or user should take notice of it. This
equipment is intended for use in business environments and not to be
used in homes.

USA (FCC) 47 CFR 15 subpart B. This product is considered an exempt
device per clause 15.103.

Meter Input Impedance: ≥1 MΩ
Maximum working pressure: 500 psi
Burst Pressure: 1000 psi

±0.25 % of reading ±0.3 psi
±0.25 % of reading ±2.1 kPa)

Vacuum

±0.25 % of reading ±0.5 in-Hg
(±0.25 % of reading ±1.3 cm-Hg)

Storage Temperature: -40 °C to 71 °C (Battery removed)

Operating Environment

Temperature Humidity

-10 °C to 10 °C
10 °C to 30 °C
30 °C to 40 °C
40 °C to 50 °C
50 °C to 55 °C

Non-condensing
0 °C to 95 % Relative Humidity
0 °C to 75 % Relative Humidity
0 °C to 45 % Relative Humidity
0 °C to 35 % Relative Humidity

General

Weight: 12 oz, (336 grams)
Battery: Standard 9 V Alkaline battery (NEDA #1604, IEC 6LR61)
Battery Life: 300 hours (typical)
Electrical Cable: Black PVC, will withstand up to 105 °C
Cable Length: 8 ft
Pressure Port Connection: 1/4 in. NPT
Connector: Brass 1/4 in. male flare to 1/4 in. female pipe thread

List of Replaceable Parts

Part Number Description

614487
2813197
2816172
913207
926873
926881

To contact Fluke or for service, call one of the following telephone
numbers:

USA: 1-888-44-FLUKE (1-888-443-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]
Or, visit Fluke's Web site at www.fluke.com.

Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 5602 B.D.
98206-9090 Eindhoven
The Netherlands

Battery, Primary, 9 V, 0-15 mA
Case Bottom, PV350
Case Top, PV350
Fitting, BR, SAE, 45, 1/4 FP
PV350 Instruction Sheet
PV350 Quick Reference Guide