MANOMETRIC PUMP P4-F-100 Operating and Service Manual Rev Jan 2003

Page 1

MANOMETRIC PUMP

ELECTRICALLY POWERED MODEL

WITH BRASS AND STAINLESS STEEL FITTINGS

OPERATING AND SERVICE MANUAL

FOR

MODEL NUMBER

PIP-4-4

PIP-4-4SS

PIP-4-6

PIP-4-6SS

PIP-4-8

PIP-4-8SS

PIP-4-12

PIP-4-12SS

PIP-4-16

PIP-4-16SS

Brass Fittings standard before March 1, 2001

Stainless Steel Fittings standard after March 1, 2001

Mui Scientific

145 Traders Blvd. E. Unit # 34

Mississauga, Ontario

Canada L4Z 3L3

Telephone: (905) 890-5525

1-800-303-6611

Fax: (905) 890-3523

Website: www.muiscientific.com

E-mail: mail@muiscientific.com

Manual P4-F-100, Revised January 7, 2003

Page 2

READ ENTIRE MANUAL

BEFORE OPERATING MANOMETRIC PUMP

ii

Page 4

List of Illustrations

Table

1

2

Title

Water Chamber Pressure Selection

vs Infusion Rate/Pressure Rise Rate

Pressure Conversion Chart

Figure

Title

Section Page

4.2

18

4.2

18

Section Page

1

Features of the Manometric Pump

2.1

2

2

Master On-Off Valve

3.4

9

3

Bottom Quick-Connect and Filter on Water Chamber

3.4

10

4

Air Quick-Connect on Top of Water Chamber

3.4

11

5

Universal Transducer Holder Assembly

3.5

12

6

Medex/pvb Transducer Holder Assembly

3.5

13

7

Installation of Stopcocks on Transducer

3.6

14

8

Poor Connections to Transducer

3.6

14

9

Pneumo-Hydraulic Calibration System (0 – 50/100 mm Hg) 3.7

15

10

Hydrostatic Calibration System (0 – 50/68 cm H2O)

3.7

16

11

Stopcock on Top of Transducer

4.4

20

12

Stopcock Manifold

4.4

21

13

Purging Air from System Using a Syringe

4.4

22

14

Stopcock Position During Calibration, Flush, and Study

4.6

24

15

Hydrostatic Calibration System (0 – 50/68 cm H2O)

4.6

25

16

Pinch Test: Pinch Point and Output Graph

4.7

26

17

Infusion Artifact

5.1

29

18

Slow Pressure Rise Rate

5.2

31

19

Calculation of Pressure Rise Rate

5.3

33

iv

Page 5

List of Technical Drawings: Section 8

Title

Page

Pump Front View

43

Electric Compartment Removal

44

Air-Water System

45

Electrical Compartment

46

Electrical Schematic

47

Block Diagram

48

Medex/pvb Transducer Holder Assembly

49

Pneumo-Hydraulic Calibration System (0 – 100 mm Hg)

50

Hydrostatic Calibration System (0 – 50/68 cm H2O)

51

v

Page 6

Section 1

Introduction

This Manometric Pump is part of the motility system used for intraluminal manometric

studies of the gastrointestinal tract, such as pressure measurement of muscular

contractions or resting tone inside the esophagus, the stomach, the bile duct, the small

intestine, the anus, rectum, or colon. Other components of this system include a set of

pressure transducers, a motility catheter, and a computerized data processing system

or a chart recorder.

The Electrically Powered Manometric Pump uses regulated compressed air to deliver

distilled water through very small bore capillary tubing to the motility catheter. The

pressurized water from each capillary tube is connected to a pressure transducer and

then passes through one lumen of the multi-lumen catheter to that lumen's single

opening into the esophagus of the patient. The pressure changes in the esophagus are

transmitted through this fluid path back to the externally mounted transducer; i.e. the

water serves as a pressure - transmission medium. Each lumen of the motility catheter

is connected to its own pressure transducer and all the pressure transducers are

connected to a computerized recording system or a strip chart recorder. The pressure

profile of the multi-channel tracing provides useful diagnostic data for evaluation of the

normal or abnormal motor function of the gastrointestinal tract. Similar applications

include pressure measurements for oropharygeal, esophageal, stomach, intestinal,

colonic, anorectal and biliary motility studies.

This Manometric Pump is designed to operate at a constant pressure rather than at a

constant flow rate. It maintains a pre-set hydraulic pressure (5-15 psi) at the water

chamber regardless of the flow. At 15 psi (776 mm Hg) the pump provides a high static

hydraulic pressure background to ensure a high pressure rise rate as well as recording

accuracy and repeatability. It can record fast pressure changes such as in the upper

esophageal sphincter. The small bore of the capillary tube also ensures a very low

infusion rate. During a motility study, the actual flow rate varies due to the varying

amount of obstruction caused by muscle contractions.

The pressure rise rate of the pump, measured as pressure change per unit of time (i.e.

mm Hg/sec or cm H2O/sec), varies directly with the water chamber pressure. A higher

water chamber pressure will result in a higher pressure rise rate but also a higher flow

rate. To achieve measurement accuracy, the pressure rise rate of the recording system

must exceed the actual physiological rise rate of the organ. The upper esophageal

sphincter has the highest muscular contraction rate of the gastrointestinal tract. A study

of this organ requires the highest pressure rise rate of the recording system, 400 mm

Hg/sec. The recommended water chamber pressure of 15 psi (pounds per square inch)

will achieve a pressure rise rate of 400 mm Hg/sec. The main purpose of reducing the

water chamber pressure from 15 to 5 psi is to reduce the infusion rate from 0.6 to 0.3

ml/min. The lower water chamber pressure and lower pressure rise rate still permit

reliable measurement accuracy on those organs that have a lower physiological

contraction rate. The pump allows the operator to change the water chamber pressure

for different physiological applications in order to optimize the pressure rise rate and

flow rate. An infusion rate table (Table 1, page 18) is provided to enable an estimate of

the total volume of water infused into the patient in a given period of time (Table 1, page

18).

1

Page 7

Section 2

2.1

Description of Manometric Pump

Diagram of Features

Figure 1. Diagram of Manometric Pump (8-channel model shown)

2

Page 8

2.2

Physical Description

The Electrically Powered Manometric Pump consists of an air compressor and a

pressure regulator inside a stainless steel case. The air supply pressurizes a water

chamber, which delivers pressurized water to a stopcock manifold, which connects in

turn to a set of capillary tubes. A set of transducer holders is located on an adjustable

support bar. The transducers and motility catheters (which are not supplied with pump)

are mounted in the transducer holders and connected to the capillary tubes. (Figure 1,

page 2)

The drying cylinder inside the stainless steel case removes moisture from the

pressurized air and serves as a high pressure air reservoir (17-40 psi). Then the

pressurized air is regulated with a manually adjustable regulator. This sets the final

pressure in the water chamber (5–15 psi). The compressor gauge (left side) shows the

high pressure in the drying cylinder. The water chamber gauge (right side) shows the

pressure in the water chamber. The white pilot light indicates the main power status,

ON/OFF. The green pilot light indicates the compressor status ON/OFF.

The water chamber is removable, simply resting inside the water chamber holder.

It is equipped with quick disconnects for the air from the top and for a filtered water

connection outlet at the bottom. The lid of the chamber is removable to facilitate filling

and cleaning. A toggle valve is provided for quick release of the chamber pressure.

The chamber float acts as a barrier to minimize air absorption into the water.

A master on-off valve controls the water flow from the water chamber to the stopcock

manifold. The 4-way stopcocks on the manifolds provide individual on-off control of the

water flow to each capillary tube. The outlet end of each capillary tube is equipped with

a standard male Luer connector for easy connection to the transducer. If required, a

female-female Luer adaptor is provided for conversion of the Luer connections.

The transducer holders (various types are available) to keep the transducers in place

and level. The adjustable support permits proper positioning of the height of the

transducers with respect to the patient.

3

Page 9

2.3

General Requirements

The Manometric Pump should be mounted on a cart or shelf at approximately the same

height as the patient's bed. The height of the transducers should be level with the

height of the patient's stomach. This will reduce the hydrostatic pressure artifact on the

transducer and on the recording.

The Manometric Pump is normally placed near the bedside close to the patient's head.

CAUTION

No electrical equipment should be located beneath the Manometric Pump. Some

water from the motility catheter is likely to drip down during the procedure. A

danger of electric shock could result.

CAUTION

Use only degassed distilled water in the water chamber. Never use tap water or

sterile irrigation water as both contain minerals which can cause blockages in

tubing or can support bacterial growth.

Electrical requirements:

(a) 115 Volt Model:

A grounded, hospital grade, 115 Volt, 50–60 Hz, 15A

electrical outlet is required. The pump is rated at 2A. A

hospital grade power cord with IEC plug is included.

(b) 220 Volt Model:

A grounded, hospital grade, 220 Volt, 50–60 Hz

electrical outlet is required. The pump is rated at 2A.

Hospital grade power cord with female IEC plug is required.

(c) 240 Volt Model:

A grounded, hospital grade, 240 Volt, 50–60 Hz

electrical outlet is required. The pump is rated at 2A.

Hospital grade power cord with female IEC plug is required.

Over-all dimensions:

Height (water chamber installed and tubing attached) ---- 50 cm (20 inches)

Width (4,6 and 8 channel models) ----------------------------- 56 cm (22 inches)

Width (12 channel model) -------------------------------------69 cm (27 inches)

Depth (transducer holders attached) -------------------------- 33 cm (13 inches)

Length of AC power cord (115v only) -------------------------- 240 cm (94 inches)

Weight:

Net weight (4,6 and 8 channel models)------------------------ 14 kg (30 pounds)

Net weight (12 channel models)-------------------------------- 15 kg (32 pounds)

4

Page 10

2.4

Certification, Classification, and Warning Statements

Certification

Europe

0120

EMC Directive

Medical Device Directive

EN46002

89/336/EEC

93/42/EEC

Authorized Representative of Mui Scientific in EU:

SOLAL

2 rue du Travail

67000 Strasbourg

France

Tel: 03 88 32 89 85

Fax: 03 88 75 17 13

International

IEC 601-1:1988

IEC 601-1:1988 Am 1:1991

IEC 801.2, 801.3, 801.4, 801.5

EN55011 (C.I.S.P.R. 11 (1990) Group1 Class B)

Mui Scientific, at 145 Traders Blvd., Mississauga, Ontario, Canada,

is registered to ISO 9002 International Standard for Quality

Management Systems

Canada

CAN/CSA - C22.2 No. 0-M91

CAN/CSA - C22.2 No. 601.1-M90

CAN/CSA - C22.2 No. 601.1S1-94

United States

UL Std. No. 544

Equipment Classification

Class I with respect to protection from electric shock

Type BF with respect to degree of protection from electric shock

Ordinary degree of protection against ingress of liquids

Equipment not suitable for use in the presence of a flammable anaesthetic mixture

with air or with nitrous oxide

Mode of operation: continuous

5

Page 11

Section 2.4: Certification, Classification, and Warning Statements, continued

Warning Statements and Warning Symbols

Type BF Equipment

DANGER: EQUIPMENT NOT SUITABLE FOR USE IN THE PRESENCE OF A FLAMMABLE

ANAESTHETIC MIXTURE

GROUND RELIABILITY CAN ONLY BE ACHIEVED WHEN THE EQUIPMENT IS CONNECTED TO A

RECEPTACLE MARKED “HOSPITAL ONLY” OR “HOSPITAL GRADE”

Note: All models (115v, 220v, 240v) require 2 fuses:

5 x 20 mm, 250v, T2A.

Environmental Conditions for Storage or Transport

When packed for transport from factory, equipment will withstand

• ambient temperature range -40°C to +70°C

• relative humidity range 10% to 100%

• atmospheric pressure range 500 hPa to 1060 hPa

6

Page 12

Section 3

3.1

Initial Installation

List of Components

Unpack the shipping carton. Locate and check off the following items:

Quantity

1

1

1

1

3.2

Description

Manometric Pump Main Assembly

(including capillary tubes and transducer holders)

Water Chamber Assembly

Hospital Grade AC Power Cord (for 115 volt model only)

Operation Manual

Initial Assembly

Remove any remaining packing material. Place the pump main assembly on a table and

make the following adjustments:

•

Adjust the height of the hexagonal transducer support bar:

Loosen the rear knurled screws on the support bar holder that mounts the hexagonal

transducer support bar. Adjust the height of the support bar so that the transducers

will be level with the approximate height of the patient's stomach during a study.

Retighten the knurled screws.

•

Adjust the orientation of the hexagonal bar:

Loosen the front knurled screws on the holder that mounts the hexagonal transducer

support bar on the front of the Manometric Pump. Rotate the bar until the universal

transducer holders are in a horizontal position as shown in Figure 1, page 2.

Medex/pvb transducer holders are positioned vertically (Figure 6, page 13).

Retighten the screws.

•

Adjust the spacing of the transducer holders:

Loosen the rear knurled screws on the transducer holders and space the transducer

holders evenly along the hexagonal bar. Retighten the screws securely.

•

If necessary, the transducer holders can be removed by sliding them off the end of

the hexagonal bar.

7

Page 13

3.3

Connecting Electrical System

•

Ensure that the main power switch (at the bottom of the left side panel of the

Manometric Pump) is in the OFF position.

•

Plug the grounded AC power cord (hospital grade) into the IEC power entry that is

next to the main power switch. Connect the power cord to a grounded electrical

outlet.

•

Turn the main power switch to the ON position.

When the main power switch is turned on, both pilot lights (white and green) will

illuminate and the compressor will run. The pressure on both gauges will rise.

After a few minutes the compressor should stop and the green compressor pilot

light should turn off. The compressor pressure gauge (left side) should be at 40

psi or higher. The white power pilot light remains lit, indicating that the main

power is still on.

The compressor gauge indicates the pressure in the high pressure drying

cylinder inside the pump. In normal operation as water empties from the water

chamber it is replaced by compressed air. The compressor pressure gauge will

drop slowly from approximately 40 psi to 17 psi. When the pressure has fallen to

17 psi, the compressor will turn on for a few minutes. When the pressure has

risen to approximately 40 psi, the compressor will turn off. After the compressor

shuts off, continuous perfusion can be maintained by the system for several

hours, depending on the number of channels and the flow rate.

The water chamber gauge (right side) shows the regulated pressure delivered to

the water chamber. This is normally set at 15 psi and remains constant. (For

other pressure settings see Section 4.2, page 18).

During normal operation the compressor will turn on and off automatically to

maintain a constant water chamber pressure.

CAUTION

Do not use pump in the presence of flammable gas.

Do not set water chamber pressure higher than 20 psi. Damage to system

could result. Excessive water will be delivered to the patient.

8

Page 14

3.4

Installation of Water Chamber

Figure 2. Master On-Off Valve

•

Before installing the water chamber, turn the master on-off valve to the OFF

position (Figure 2).

•

Place the water chamber into the plastic holder on top of the Manometric Pump,

lining up the water quick-connect pointing to the left on the bottom of the water

chamber with the slot in the holder (Figure 3, page 10).

The plastic holder enables one person to easily remove or tighten the lid of the

water chamber.

•

Unscrew the lid of the water chamber. Discard any packing material, and

remove the round float by the black knob.

•

Ensure the inside of the water chamber is clean. Fill three-quarters full with

distilled water only.

Never use tap water or sterile irrigation water as both contain minerals

which can cause blockages in tubing or can support bacterial growth.

•

Replace the float in the water chamber at an angle to avoid any bubbles being

trapped under the float.

The float reduces the surface area of pressurized air exposed to the water. It

minimizes the amount of gases absorbed by the water. Excessive amounts of

dissolved gases cause bubbles to form in the transducer and reduce the overall

system pressure rise rate and recording accuracy.

•

Check that the O-ring is lightly greased (with petroleum jelly).

9

Page 15

Section 3.4: Installation of Water Chamber, continued

•

Screw the lid back on and tighten securely.

•

Connect the bottom quick-connect on the water chamber by pressing the metal

tab on the water chamber connector and pushing the elbow connector in until it

snaps (Figure 3a below).

This connection delivers pressurized water from the water chamber through the

master on-off valve into the stopcock manifold and into the capillary tubes. A

stainless steel filter on the quick-connect inside the water chamber filters all

water delivered to the capillary tubes.

• To disconnect the quick-connect, push down on the metal tab and pull the elbow

connector out. The water flow will automatically shut off at both ends of the

quick connect (Figure 3b below).

Figure 3. Bottom Quick-Connect and Filter on Water Chamber

TO CONNECT:

Make sure that the metal tab is down,

Insert the elbow quick connect and push

it in until the metal tab snaps up into

the lock position.

TO DISCONNECT:

Push down on the metal

tab and pull the elbow

quick connect out.

10

Page 16

Section 3.4: Installation of Water Chamber, continued

•

Check that the master on-off valve is turned to the OFF position.

•

Connect the top quick-connect on the water chamber; push the two metal fittings

together until they snap into the latched position.

This connection delivers compressed air from the pressure regulator to the water

chamber.

•

To release the quick-connect, push down on the flange (Figure 4). When

disconnected, air pressure in the water chamber is released and air flow from the

compressor is shut off at the tubing end of the quick connect.

The toggle pressure release valve as shown in Figure 4 below is in the normal

CLOSED position. To OPEN the valve squeeze the black handle toward the body

of the valve. The valve opens momentarily to release pressure from the system.

Figure 5. Air Quick-Connect on Top of Water Chamber

TO CONNECT:

Push down on the body

until connection snaps together.

The gap between the body

and the flange will disappear.

TO DISCONNECT:

Push down on the flange

until the body of the quick

connect pops up and

disconnects. Lift the connector body

off the post.

11

Page 17

3.5

Installation of Transducers

A. Universal Transducer Holder Installation

If the pump is supplied with the Universal Transducer Holder Assembly, then use

the following steps to install transducers (not supplied) on the Manometric Pump.

•

Position the universal transducer holders horizontally (Figure 1, page 2).

•

Loosen the 2 front knurled screws on the universal transducer holder.

•

Slide the transducer between the front bracket and the V-shaped cutout in the

holder as shown in Figure 5 (a), 5 (c) below.

To hold a smaller diameter transducer, remove the 2 front knurled screws

completely and reverse the front bracket of the transducer holder as shown in

Figure 5(b).

•

Clamp the transducer in the holder assembly by retightening the two knurled

screws against the front bracket.

CAUTION

Do not over-tighten the knurled screws against the front bracket.

Damage to the transducer may result.

Figure 5. Universal Transducer Holder Assembly

12

Page 18

Section 3.5: Installation of Transducers, continued

B. Medex/pvb Transducer Holder Installation

If your pump is supplied with the Medex or pvb Transducer Holder Assembly, as

shown in Figure 6, simply slide the transducer into the slot on the transducer

holder plate from the top.

The transducer holder plate can be repositioned by loosening and tightening the

knurled thumbscrews at the back of the assembly.

Figure 6. Medex/pvb Transducer Holder Assembly

13

Page 19

3.6

Installation of Stopcocks

Install plastic stopcocks (not supplied) to

the input and output ports of the transducers and

attach capillary tubes as shown in Figure 7

(shown right).

NOTES:

The most common cause of loss of

recording accuracy in a motility system is

air bubbles trapped in the transducer or in

the motility catheter. The diagram to the

right shows the way to connect the

transducers to the Manometric Pump and

the catheter when using a pneumohydraulic calibration system (Figure 9,

page 15). This setup requires additional

2-way and 4-way stopcocks for each

transducer. Ample water under pressure

can be flushed from the bottom to the

transducer in order to push any air bubbles

up and out the top of the transducer. This

method ensures that the transducer and

catheter are free of air bubbles in the

shortest time possible.

Figure 7. Installation of Stopcocks

on Transducer

Other methods of connection are less

satisfactory. For example, the method of

connection shown in Figure 8 is not

recommended. The small flow from the

capillary tube is not able to flush out all the

small air bubbles efficiently.

NOTES:

Extra care must be taken to eliminate air

bubbles.

A 3-way stopcock can be attached to the

bottom of the transducer for flushing with a

syringe, as shown in

Figure 13, page 22.

Figure 8. Poor Connection to

Transducer

14

Page 20

3.7

Installation of Calibration System

A. Installation of Pneumo-Hydraulic Calibration System (0-50/100 mm Hg) with

Flushing Bottle, Part # P4-H-102

•

Attach the round calibration support rod for the calibration system to the right rear

side of the Manometric Pump using the two 1-inch long screws, washers, and

locknuts provided (Figure 9, below).

•

Clamp the calibration bottle to the top of the calibration rod using the bottle

clamp provided.

•

Attach the large end of the tubing manifold to the bottom of the bottle and the

other ends to the 2-way stopcocks on the bottom of the transducers.

•

Turn all the 2-way stopcocks to the OFF position

•

Fill the calibration bottle three-quarters full with distilled water.

Wipe excess water from the inside neck of the bottle.

•

Insert the rubber stopper, with coiled tubing attached, into the top of the bottle.

•

Attach the calibration gauge to the calibration rod using the plastic wire ties

provided.

Figure 9. Pneumo-Hydraulic Calibration System (0-50/100 mm Hg)

15

Page 21

Section 3.7: Installation of Calibration System, continued

B. Installation of Hydrostatic Calibration System (0-50/68 cm H2O)

0-50 cm H2O System, Part #P4-H-610

0-68 cm H2O System, Part #P4-H-620

•

On the square calibration rod locate the two white plastic tube-holders. Slide a clear

plastic 8-inch tube into the hole of each tube-holder as shown in Figure 10, below.

Tighten the knurled screw to secure the clear plastic tube.

•

Slide the square calibration rod into the two calibration rod holders on the right-hand

round support basket. The clear plastic tubes should be oriented perpendicular to

the pump as shown in Figure 10. The lower clear plastic tube should be at the same

level as the transducers for 0 cm H2O or low calibration. The upper plastic tube is for

50 or 68 cm H2O for high calibration (68 cm H2O = 50 mm Hg).

Figure 10. Hydrostatic Calibration System (0 –50/68 cm H2O)

16

Page 22

Section 4

Preparation Procedures

Section 3 has provided the installation details of each major component of the

Manometric Pump. Section 4 describes all of the procedures required to prepare

the pump for motility studies and routine maintenance. These preparation

procedures begin with the filling of the water chamber.

4.1

Filling Water Chamber

•

Turn the master on-off valve to the OFF position.

•

Place the water chamber into the plastic holder on top of the pump, lining up the

bottom quick-connect on the water chamber pointing to the left with the slot in the

holder.

•

Unscrew the lid of the water chamber and remove the round float by grasping the

knob.

•

Ensure that the inside of the water chamber is clean. Fill three-quarters full with

distilled water only.

Never use tap water or sterile irrigation water as both contain minerals

which cause blockages in tubing and support bacterial growth.

•

Replace the float in the water chamber at an angle to avoid any bubbles being

trapped under the float.

Note: Never use the pump without the float in the water chamber.

Air bubbles will form at the transducer and will reduce the pressure

response rate and the accuracy of measurement.

•

Screw the lid back on and tighten securely.

•

Attach the bottom plastic quick-connect located at the bottom of the water

chamber (Figure 3, page 10).

•

Connect the top metal quick-connect located on the lid of the water chamber

(Figure 4, page 11).

17

Page 23

4.2

Selecting Water Chamber Pressure

To select water chamber pressure for optimal recording accuracy of pressure rise

rate for your recording site or organ, refer to the table below and adjust the water

chamber pressure accordingly. The associated infusion rate is provided in the

table to enable a quick estimate of the total volume of water infused into the

patient in a given period of time.

15 psi is the recommended pressure for esophageal and upper esophageal

sphincter studies. For a small bowel study, the pressure should be set at 7 psi.

For a colon study the pressure can be as low as 5 psi.

CAUTION

Do not set water chamber pressure higher than 20 psi.

Damage to system could result. Patient will receive excessive water.

Table 1. Water Chamber Pressure Selection vs Infusion Rate/Pressure Rise Rate

RECORDING

SITE

(ORGAN)

APPROXIMATE

INFUSION

RATE

RECOMMENDED

WATER CHAMBER

PRESSURE

WITH STANDARD

CAPILLARY TUBE

MINIMUM

PRESSURE RISE

RATE

AT CATHETER

OPENING

ml/min

pound/square inch

(kPa)

mm Hg/sec

UES

0.6

15 (103)

400

Esophagus

0.6

15 (103)

400

Stomach

0.6

15 (103)

400

Small Bowel

0.4

7

(48)

120

Bile Duct

0.4

7

(48)

120

Colon

0.3

5

(35)

60

Table 2. Pressure Conversion Chart

Psi

cm of H2O

mm of Hg

kPa

20

15

7

5

1408

1056

493

352

1034

776

362

259

138

103

48

35

18

Page 24

4.3

Adjusting Water Chamber Pressure

•

Check that the master on-off valve is at the OFF position (Figure 2, page 7).

•

Turn on the power switch.

•

Adjust the black regulator control knob until the water chamber gauge (on the

right hand side of the pump) indicates 15 psi (Figure 1, page 2).

The black regulator control knob is located on the top of the pump on the right

hand side. It controls the pressure regulator that is mounted inside the case.

The regulator reduces the high pressure coming off the compressor and delivers

compressed air at a lower pressure to the water chamber.

TO INCREASE PRESSURE:

• Turn the regulator knob clockwise.

TO DECREASE PRESSURE:

Because the pressure regulator is a non-relieving type, in order to decrease the

pressure to a new setting, it is necessary to relieve the downstream pressure

trapped inside the regulator and the water chamber to below the desired new

setting. Then increase the pressure to the desired new setting. Follow the steps

below:

•

First turn the regulator knob counter-clockwise 2 complete turns.

The needle on the water chamber gauge will not move because the

existing pressure is still trapped in the water chamber and in the

downstream side of the regulator.

•

Then release the excess pressure using the toggle pressure release

valve on top of the water chamber. Squeeze the black handle of the

toggle valve toward the body of the valve momentarily (Figure 4, page

11).

The water chamber gauge needle will show a drop in pressure.

•

Repeat the above two steps if necessary until the water chamber

pressure falls to a level below the desired pressure.

•

Turn the regulator knob clockwise to increase the pressure to the

desired level.

Note: The toggle valve can be locked in the open position if the black handle of

the toggle valve is pulled backward into a fully extended position at 90º to the

body of the valve.

CAUTION: Do not leave the toggle pressure release valve locked in the fully

open position. The compressor motor will run continuously. This may cause

overheating of the compressor motor.

19

Page 25

4.4

Purging Air from Pump and Transducers

During the following procedures, it is helpful to a place a towel under the

transducers to absorb any water that may spill onto the pump.

•

After the water chamber pressure has been adjusted to the desired level (usually

15 psi), open all 4-way stopcocks on top of the transducers as shown in Figure

11 below.

•

Turn the master on-off valve to ON (Figure 2, page 9).

Figure 11. Stopcock on Top of Transducer

20