RP-1 Peristaltic Pump

User Guide 9920-179 Rev E
EC Declaration of Conformity

according to ISO/IEC Guide 22 and EN45014

Manufacturer’s Name: Rainin Instrument Co.

Manufacturer’s Address: 5400 Hollis St.

Emeryville CA 94608

U.S.A.

declares that the following product:

Product Name: RP-1 Peristaltic Pump

Model Number: RP-1

Product Options: 1 channel liquid head

2 channel liquid head

3 channel liquid head

4 channel liquid head

conforms to the following Product Specifications:

Safety: EN61010-1:1993

IEC1010:1990 + A1,A2

EMC: EN55011:1988 Class A 

(Electromagnetic Interference)

EN50082-1

pr EN55024-2:1992(Electrostatic Discharge)

pr EN55024-3:1991(Electromagnetic Immunity)

pr EN55024-4:1993(Electrical Fast Transient)

Supplementary Information:

Responsible Signatory: Haak Magnussen, VP of R&D

Date: March 1, 1996

The Model RP-1 Peristaltic Pump is classified as Portable

Equipment of Installation Category II.
WARNINGS

The following warnings and signs appear in this manual:

WARNING: Keep hands and foreign objects away from the rollers while

the machine is in operation.

WARNING: If using the Model RP-1 at high pressure (>25 psi) ensure

that the operating pressure does not exceed the maximum rated pressure of the tubing.

WARNING: When cleaning the Model RP-1 tubing head, make sure

that the power is turned off.

WARNING: Switch off the pump power before replacing the pump

head.
CONTENTS:

Section 1 Introduction 1

General Description 1

Unpacking 2

Section 2 Controls and Indicators 3

Front Panel 3

Rear Panel 4

Section 3 Tubing 6

Tubing Selection 6

Tubing Installation 6

Drain Tubing 7

Section 4 Set Up and Operation 8

Set Up 8

Operation 9

Autostart 9

Operating Requirements 10

Operating Suggestions 10

Section 5 Remote Control 11

Contact-Closure Remote Control 11

Computer Remote Control 12

Section 6 Pump Head Replacement 13

Section 7 Troubleshooting 15

Section 8 Specifications 16

Pump Options 16

Specifications 16

Section 9 Accessories 17

Tubing 17

Pump Heads 17

Connectors and Unions 18

Appendix A Fuse Installation 19

Appendix B Computer Remote Control 21

FIGURES

Figure 1 Dynamax Model RP-1 Peristaltic Pump 1

Figure 2 Front Panel 3

Figure 3 Rear Panel 4

Figure 4 Pump Head 6

Figure 5 Installing Tubing 7

Figure 6 Pump Speed/Flow Rate Chart 8

Figure 7 Terminal Connector 11

Figure 8 Pump Head Replacement 14

Figure 9 Fuse/Line Voltage Module 19

Figure 10 RS-422 Signal Lines 21

Figure 11 Connect/Disconnect Sequence 22

RAININ is a registered trademark of Rainin Instrument,LLC.

© 1996-2007, Rainin Instrument, LLC, 7500 Edgewater Drive, Oakland, CA 94621, USA.

Prices and specifications are subject to change without notice.
1: Introduction

The Dynamax RP-1 Peristaltic Pump is specifically designed for fluid transfer. The

rotating head has ten stainless-steel rollers. As the head rotates, five of the rollers

press the tubing up against the compression arm, producing flow by peristaltic

action. Five rollers constantly in contact with the tubing ensures low pulsation,

smooth flow, and high pressure. Model RP-1 is ideal for critical liquid chromatography, gradient generation, and flow analyzer applications.

The RP-1 incorporates a unique cam design: the adjustment screw does not press

the compression arm directly. Instead, turning the adjustment screw in the RP-1

moves a cam which applies gradual force to the compression arm. This results

in more precise flow control and reduced tubing wear.

RP-1 is powered by a high torque stepper motor, controlled by a microprocessor

with unique feedback circuitry for good speed stability, even at very low flow rates.

Speed stability is maintained between 0° – 40°C and against back-pressures of

up to 5 bars. Pump speed is shown in revolutions per minute (rpm) on a liquid

crystal display (LCD) on the pump front panel. Pump speed and direction of rotation are controlled by a membrane keypad next to the display. 

Several pump heads are available: a single-channel model and three multi-channel versions: 2-, 4-, and 8-channel. Individual tubing compression settings on the

multi-channel pump heads allow different diameter tubing to be used for each

channel. Independent compression settings for each channel ensure optimum

flow rate and long tubing life. 

Fixed collars bonded to the tubing allow easy tube installation at the proper tension, in turn ensuring that the tubing diameter is optimized and not altered from

day to day. Precise and accurate motor speed setting, correct tubing tension, and

reproducible tubing diameter all contribute to ensuring reproducible flow rates. 

1

PUMP HEAD

PUMP BODY (SHOWN TURNED 90°)

LIQUID CRYSTAL DISPLAY (LCD)

KEYPAD

Figure 1 Dynamax RP-1 Peristaltic Pump

General

Description
The shipping container should hold the following:

Description Qty

Pump Body 1

Pump Head 1 (as ordered)

Accessory Pack containing:

Power Cord 1

Fuses 4

Mounting Screws 2

Tubing

0.38 mm ID 1

1.52 mm ID 1

3.16 mm ID 1

Drain tubing 2

Instruction Manual 1

If any item from the above list is missing, please call Customer Service at 800-472-

4646.

The Dynamax Model RP-1 Peristaltic Pump was shipped in excellent working condition. Inspect the pump on receipt for possible shipping damage. In case of damage, file a claim immediately with the shipping carrier — damage sustained in transit is the responsibility of the carrier. Save the shipping container and packing materials until any damage claim is resolved and the pump is functioning properly. The

container and packing materials also afford excellent protection during future storage

or transportation.

2

Unpacking
2: Controls and Indicators

LCD: The 3-digit, 2-symbol liquid crystal display shows motor speed in rpm.

When the pump is running, a plus or minus sign is also displayed to indicate

clockwise (+) or counterclockwise (–) rotation of the pump head. 

PRIME key: High-speed override, for priming the tubing lines. Pressing this key

when the pump is running speeds the pump to its maximum rate of 48 rpm.

(Pressing the key has no effect when the pump is not running.) The pump

remains at the high flow rate until the PRIME key is pressed again, or until either

of the two START keys is pressed. Then the pump reverts to its previous speed.

MINUS key: Decreases motor speed. Pressing and holding this key while the

pump is running decreases the pumping speed continually as long as the key is

held. Pressing and holding the key while the pump is not running sets the speed

at which the pump will operate when it starts.

PLUS key: Increases motor speed; use is similar to MINUS key.

3-Digit, 2-Symbol Liquid

Crystal Display

Prime Key Decrease

Pump Speed

Increase Pump

Speed

Start Clockwise

Start

CounterClockwise

Stop Pump

(and store

displayed

speed for

next start) 

Figure 2 RP-1 Front Panel

3
START Clockwise key: Pressing this key when the pump is stopped starts the

roller barrel rotating clockwise at the speed displayed on the LCD. Pressing it while

the pump head is at maximum speed (after the PRIME key has been pressed)

causes the pump to revert to its previous speed. Pressing the key while the pump

is running counterclockwise stops the roller barrel and immediately starts it rotating clockwise at the same speed.

START Counterclockwise key: Used in a similar way to the START Clockwise Key.

STOP key: Stops the pump and stores the value displayed on the LCD. This

value is used when the pump is started with either of the START keys.

Power Line Module: Power is supplied to the RP-1 pump via a power line module containing:

1. Power On/Off Switch — Two-position rocker switch that supplies AC power.

I is ON, O is OFF.

2. Power Cord Receptacle — Grounded three-pin receptacle. Accepts the power

cord supplied in the accessory kit.

3. Fuse/Line Voltage Selector — Two-position 110V/220V line voltage selector

containing two fuses.

4

Figure 3 Rear Panel

Cooling Fan

Power

Line

Module

External

Contacts

Terminal

Strip

Serial

Interface

Rear Panel

Rear Panel
Note: The RP-1 Pump is shipped from the factory ready for operation at the

line voltage of the destination country. Refer to Appendix A for fuse information before operating the pump.

External Contact Terminal Strip: Terminal strip for contact-closure remote control.

Inputs control: Speed, Stop/Run, and Rotation Direction. There is also a +5V DC

output on the terminal strip, used as an auxiliary voltage. Please refer to Section

5 for more information regarding remote control.

Serial: Serial interface socket for computer remote control. Please refer to Section

5 for more information regarding serial interface remote control.

5
3: Tubing

The Model RP-1 uses special tubing with bonded collars. Choose the tubing most

suitable for your application, from: 

Polyvinyl Chloride (PVC) - for most aqueous solutions.

Silicone - for aqueous and polar solutions.

Viton® - for gases, oils, strong acids, temperatures to 200°C.

Different diameter tubing can be installed on adjacent channels to give a variety

of flow rates for a given pumping speed.

1. Referring to Figure 4, open the compression arm by pressing the beveled

trigger key toward the rollers. This allows the locking arm to be pulled out,

in turn allowing the compression arm to be pulled clear of the rollers.

2. Select a length of tubing of the desired diameter and insert one of its fixed

collars into one of the grooves on the collar bracket. 

3. Thread the tubing around the rollers so it fits into the groove in the compression arm (the groove prevents the tubing from snaking during operation). Stretch the tubing slightly and insert the other fixed collar into the

groove on the opposite collar bracket. See Figure 5.

4. Close the compression arm on the tubing and close the locking arm. (This

action also “sets” the trigger key.) 

5. Repeat steps 1 to 4 for each channel and loosen all the adjustment screws

for now.

6 Viton is a trademark of DuPont Dow Elastomers.

Tubing

Selection

Tubing

Installation

Collar

Bracket

Rollers

Trigger Key

Locking

Arm

Compression

Cam

Adjustment

Screw Compression Arm

Figure 4 Pump Head
Because of tubing inconsistencies, the tubing may ride up or down on the

rollers. If this happens, twist the collar on the affected end of the tubing up

to 180° in the opposite direction to the movement of the tubing. See the

diagram below.

WARNING: If using the Model RP-1 at high pressure (>25 psi) ensure that

the operating pressure does not exceed the maximum rated pressure of the

tubing.

Attach a drain tube from the accessory kit to the stub at the back of the pump head

by pushing it firmly over the stub. This will help prevent any liquid spill (due to a

flow tubing break) from leaking under the rollers and into the pump electronics.

7

Figure 5 Installing Tubing

EXPERIMENT FOR BEST RESULTS. OR CALL TECH SERVICES AT 800-543-4030.

Drain Tubing
4: Set-up and Operation

1. Connect the RP-1 to a GROUNDED AC power source.

2. Switch the pump ON using the power switch on the rear panel. The LCD

will display the speed set when the pump was last used. (The speed is set

to 10.0 rpm at delivery.) The pump will not operate until you press either

of the START keys.

3. Select the type of tubing to be used (see Section 3). Determine your maximum desired flow rate, then refer to the table below to select the specific

diameter tubing and speed setting to produce that maximum flow rate. 

4. Set the pump speed using the plus or minus speed control key. (Pressing

either key once changes the rightmost digit in the display; pressing and

holding the key changes the speed continually at an increasing rate). Do

not start the pump yet.

5. Install flow tubing for each channel that you wish to use, as described in

the previous section. Attach connectors, couplings, and additional tubing

(see Section 9 — Accessories) as necessary to complete a fluid path from

reservoir to collection vessel. 

WARNING: If using the Model RP-1 at high pressure (>25 psi) ensure that

the operating pressure does not exceed the maximum rated pressure of the

tubing.

8

Set-up

Cat. No. Description Max. Flow

39-628 PVC, 3.16 mm ID 28.2 mL/min

39-627 PVC, 2.80 mm ID 24.6 mL/min

39-626 PVC, 2.29 mm ID 17.2 mL/min

39-625 PVC, 1.52 mm ID 8.3 mL/min

39-624 PVC, 0.76 mm ID 2.2 mL/min

39-623 PVC, 0.63 mm ID 1.6 mL/min

39-622 PVC, 0.50 mm ID 1.13 mL/min

39-621 PVC, 0.38 mm ID 0.66 mL/min

39-620 PVC, 0.25 mm ID 0.33 mL/min

Figure 6 Pump Speed/Flow Rate Maxima
1. Start the pump in the desired direction by pressing either START key (clockwise or counterclockwise).

2. Adjust the cam pressure for each channel by slowly tightening the adjustment screw until flow just starts, then tighten the screw 1

⁄4 turn further.

(Tighten only to the minimum necessary for pumping to assure long tubing life.)

3. When using new or dry tubing, press the PRIME key to prime the tubing.

After the tubing is primed, press the PRIME key again or the START key to

revert to the previously set flow rate.

4. Allow the flow to stabilize for 15 minutes then check the flow rate and cam

tension. Adjust as necessary.

The RP-1 pump has an Autostart feature which operates as follows: If the pump

is running and the electrical power is interrupted, the pump will restart automatically at the same speed when the power supply resumes. When this happens, the

display flashes on and off (indicating Autostart) until either of the START keys or

the STOP key is pressed. 

If the pump is not running when the power is interrupted, operation is normal. The

pump will not automatically restart when power resumes, but will idle until either

START key is pressed.

Note: The Model RP-1 must be running for at least ten seconds before

power is interrupted for the Autostart feature to work.

Autostart is set “ON” when the pump is delivered. You can turn Autostart off as follows:

1. With the power off, press and hold the STOP key while you switch the

power on. When the display appears, release the STOP key. The display

should read A30, where A indicates Autostart enabled, and 30 indicates

the unit ID number for remote operation (see Section 5.)

2. If you wish, change the Autostart status by pressing the PRIME key. The A

changes to a dash (-) to show Autostart disabled. Pressing the PRIME key

again enables Autostart and changes the dash to an A. Set the Autostart

status as desired.

3. Press the STOP key again to store the Autostart status and revert to normal

display (rpm).

9

Operation

WARNING: Keep hands and foreign objects away from the rollers while the

machine is in operation.

Autostart
10

The Model RP-1 is designed to operate in a laboratory or similar setting at temperatures between 4°C and 40°C. The pump should be placed on a clean flat surface and should be operated in an area with adequate ventilation, free of volatile

fumes. All air holes on the pump should remain unobstructed during operation.

If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired.

Ensure that the fan is not obstructed during operation.

■ For accurate slow flow rates, use small diameter tubing at a fast speed,

not large diameter tubing at slow speed.

■ For maximum tubing life, use slow or medium speed with appropriate

diameter tubing for desired flow rates.

■ Install the drain tube supplied in the accessory kit to the stub on the back

of the pump head (see Section 3).

■ Change flow tubing as soon as any signs of cracking, wear, or stiffness

are seen. Replacing worn tubing before it leaks will help avoid spillage into

the pump electronics compartment, and possible costly repairs.

■ Place the RP-1 higher than the liquid reservoir or collection vessel to prevent gravitational flow into the pump in the event of a tubing break.

■ When the pump is not in use, press the trigger key to release the compression arm. Relax the tubing by unhooking one of the tubing collars.

This will improve start-up performance by eliminating flat spots in the flow

tubing caused by the pressure of the cam against the rollers. Flat spots will

eventually work out of the tubing, but initially can cause excessive pulsation and irregular flow rates.

■ Clean any spills promptly, especially near the pump head and on the front

panel membrane and display.

■ Turn the power off when cleaning the Model RP-1. Use a cloth dampened

with water only to clean the pump; do not use harsh detergents or any solvents for cleaning.

Operating

Requirements 

Operating

Suggestions

WARNING: When cleaning the Model RP-1 tubing head, make sure that

the power is turned off.
5: Remote Control

The RP-1 Peristaltic Pump can be remotely controlled by contact closures from a

suitable device through the terminal connector on the rear panel, when: 

1) the pump STOP key has been pressed, and 

2) the pump is not under computer remote control.

Flow must be stopped to switch between keyboard control and contact closure

remote control and vice versa. 

Inputs in the terminal connector control: Pump Speed (pin 1), Stop/Run (pin 3),

and Rotation DIrection (pin 5). Ground connections are available on pins 2, 4, 6,

and 8. Pin 7 supplies a +5V output. The voltage range for pin 1 is from 0V

(stopped) to +5V (100% of speed set on keyboard). Electrical levels for pins 3

and 5 are +5V open, 0V closed. The terminal connector is shown in Figure 6, with

pinouts for the inputs shown below.

SPEED: Pump speed is controlled by supplying up to +5V analog DC voltage

between pin 1 and GROUND (pins 2, 4, 6). When controlled in this way, actual

speed of the pump head is:

Actual Speed = (Nominal Speed x Voltage)

5 volts

where: actual speed is the speed of the pump head, and nominal speed is the

speed selected with Plus or Minus keys.

11

ContactClosure

Remote Control

Contact Input Electrical level Input state

Pin 1 Speed 0 to +5V 0-100% of speed set on keyboard

Pin 3 Stop/Run +5V (open) Stop

0V (closed) Run

Pin 5 Rotation Direction +5V (open) Clockwise

0V (closed) Counterclockwise

Pin 7, 8 (+5 V Output) +5V out —

Pin 2,4,6 Ground 0V Ground

Terminal Connector Pinouts

Figure 7 Terminal Connector
e.g.: If the nominal speed is 20 rpm and the analog DC voltage is 4V, actual

speed is 16 rpm.

When STOP/RUN is closed (pump running), the actual pump head speed is displayed. When STOP/RUN is open (pump stopped), the nominal speed is displayed.

Notes: 1) The SPEED input operates only when STOP/RUN is closed. 

2) The SPEED input is internally pulled up to +5V to make actual speed

equal to nominal speed when this input is open.

STOP/RUN: The pump runs when pin 3 is closed (shorted to GROUND: pins 2,

4, 6 or 8). When the input is open, the pump does not run.

ROTATION DIRECTION: With this input open, rotation will be clockwise. When

closed (shorted to GROUND: pins 2, 4, 6 or 8), rotation will be counterclockwise.

+5V OUTPUT: Supplies +5V DC voltage for external uses.

Internally limited to 70 mA.

The RP-1 Peristaltic Pump can be remotely controlled by an external computer

through the serial interface socket on the rear panel. Up to 64 devices with unique

unit ID numbers (0 through 63) can be controlled one at a time via the same serial interface on the computer.

Each RP-1 pump has a unit ID number, set at the factory to 30. 

To change the ID number, switch the pump off, press the STOP key and switch the

pump on again. The display should read A30, indicating that the Autostart feature

is enabled (see section 4) and that the pump’s unit ID is 30. 

Press the PLUS or MINUS key to change the ID number. Store the new ID number

by pressing the STOP key again.

Software for controlling the Model RP-1 from an external computer must use specific command protocols, described in Appendix B. 

12

Computer

Remote 

Control
6: Pump Head Replacement

The RP-1 Peristaltic Pump is shipped fully assembled, with the pump head that

you ordered already installed. Follow the instructions below if you have purchased

an additional head and wish to replace the pump head, or if you wish to reposition the pump head.

1. Open the compression arm for each channel by pressing the trigger keys

toward the rollers. This allows the locking arms to be pulled out and frees

each compression arm. Rotate each compression arm away from the

rollers.

2. The pump head is attached to the pump body with two hex-head machine

screws. With a 5 mm hexdriver, loosen both screws so you can lift the

head from the pump body.

3. With the head removed, lightly coat the top of the pump around the opening with silicone grease. This will help prevent any spillage from seeping

into the pump body.

4. If you are changing heads, remove the mounting screws from the head

and insert them into the holes in the replacement head.

Note: Four screw holes in the pump cover give you four positions to install

the pump head. The recommended position is as shown in Figure 1 of this

manual, with the tubing collar brackets to the right. To avoid any possibility of liquid from the drain tube dripping on the keypad, do not position

the head with the tubing collar brackets to the back.

5. Refer to Figures 8A and 8B and position the pump head on the pump

cover. Turn the roller barrel until the slot at the base of the pump head is

aligned with the black plastic tenon in the opening on top of the pump

body. 

6. Engage the slot at the base of the pump head with the tenon, gently turning the roller barrel back and forth to assist engaging the slot and tenon.

7. When the slot and tenon are matched (when the pump head is flush with

the pump body) gently lower the head until the mounting screws locate

their threaded holes. Tighten the mounting screws to secure the pump

head in place. Do not overtighten the screws. The procedure is now complete.

13

WARNING: Switch off the pump power before replacing the pump head.
Figures 8A and 8B Pump Head Replacement

14

Replacing the

Pump Head Pump Head

Slot

Tenon
7: Maintenance and

Troubleshooting

The RP-1 pump is ruggedly designed and should require little maintenance and

few operating precautions:

■ operate the RP-1 only at the recommended line voltage

■ operate the pump within a laboratory or similar setting

■ use only recommended tubing

■ do not place anything on top of the pump head

■ avoid mechanical shock to the RP-1

■ keep the instrument clean and mop up any spills promptly

■ use a soft cloth moistened with water to clean the pump

■ do not use harsh detergents or any solvents to clean the pump

Excessive or Check that pressure is not too high on 

premature wear compression arm. Tighten tension 

on flow tubing screw only enough to produce flow. 

Pump will not run. Check that the pump is plugged in, 

Display blank switched on, and that power is supplied 

to the wall socket.

Check that the fuses are intact and

replace if necessary. (See Appendix A.)

Pump will not run Check that the STOP button is pressed.

in contact-closure

Remote Control Check that the SPEED input is not 

shorted to GROUND.

Other problems Contact Rainin Technical Support at

800-543-4030.

15

Troubleshooting Table

Maintenance
8: Specifications

Approx Approx 

Model Cat No. Size Weight

1-channel 7103-051 160 W x 190 D x 210 H (mm) 4 kg

6.3 W x 7.5 D x 8.27 H (in) 8.75 lbs

2-channel 7103-052 160 W x 190D x 215 H (mm) 4.2 kg

6.3 W x 7.5 D x 8.46 H (in) 9.25 lbs

4-channel 7103-054 160 W x 190D x 235 H (mm) 4.4 kg

6.3 W x 7.5 D x 9.25 H (in) 9.75 lbs

8-channel 7103-058 160 W x 190 D x 275 H (mm) 5.3 kg

6.3 W x 7.5 D x 10.83 H (in) 11.75 lbs

Pump body 7103-050 160 W x 190 D x 165 H (mm) 3.7 kg

6.3 W x 7.5 D x 6.5H (in) 8.25 lbs

Head speed: 0 to 48 rpm

Torque: greater than 3 N-m across full operating range

at 115VAC

Speed stability: 0.5%

Speed adjustment: 0.00 to 9.99 rpm in 0.01 rpm 

increments

10.0 to 48.0 rpm in 0.1 rpm 

increments

Flow rate: 0-37 mL/min max at 0 backpressure (depending on tubing diameter)

Max back-pressure: 70 psi

Wetted surfaces: PVC, Silicon, Viton (tubing only)

Flow tubing diameter: 0.25 mm ID - 4 mm ID

Line voltage: 110V (nominal): 90V to 130V

220V (nominal): 180V to 260V

(The rated voltage implies a ±10% fluctuation

of 100-240VAC in mains power output; the RP1 will operate between 90 and 260 volts.)

Line frequency: 50 - 60 Hz

Power consumption 40 watts max, 20 watts typical

Temperature: 4° to 40°C

Humidity: up to 95% non-condensing

Operating position: vertical ± 5°

Prices and specifications are subject to change without notice.

16

Pump Options

Specifications
9: Accessories

Cat. No. Tubing ID, mm Max Flow (48rpm) Color

Length (in) mL/min

Polyvinyl Chloride. For most aqueous solutions. Low gas permeability. Pkg. of 12.

39-620 14 0.25 0.33 Orn/Blue

39-621 14 0.38 0.66 Orn/Green

39-622 14 0.50 1.13 Orn/Yel

39-623 14 0.63 1.6 Orn/White

39-624 14 0.76 2.2 Black

39-625 14 1.52 8.3 Yel/Blue

39-626 14 2.29 17.2 Pur/Blk

39-627 14 2.8 24.6 Pur/Wht

39-628 14 3.16 28.2 Blk/White

Silicone. For aqueous and polar solutions. High gas permeability. 

Cold-room applications. Pkg. of 12.

39-660 14 0.25 0.26 Orn/Blue

39-661 14 0.38 0.6 Orn/Green

39-662 14 0.50 0.95 Orn/Yel

39-663 14 0.63 1.5 Orn/White

39-664* 14 0.76 2.0 Black

39-665* 14 1.52 7.4 Yel/Blue

39-666* 14 2.29 15.4 Pur/Blk

39-667* 14 2.8 20.6 Pur/White

* Autoclavable

Viton. For gases, oils, strong acids, bases, organics, up to 200°C. Pkg. of 12.

39-640 7 0.50 0.6 Orn/Yel

39-641 7 0.63 0.94 Orn/White

39-642 7 0.76 1.2 Black

39-643 7 1.42 4.7 Yellow

39-644 7 2.28 11.8 Pur/Blk

39-645 7 2.79 15.8 Pur/White

17

Tubing
18

Cat No Description 

7103-061 Single-Channel Head 

7103-062 Two-Channel Head 

7103-064 Four-Channel Head

7103-068 Eight-Channel Head

all heads have stainless steel rollers

Cat No Description

P-757 Peristaltic Tubing Adapter

Connects small-diameter flexible peristaltic 

tubing to PTFE or other rigid polymeric 

tubing using standard 1/4-28

flanged or flangeless inert fittings

PEEK, fits flexible tubing with 

ID 1.22-–2.79 mm and OD up to 5 mm

Pump Heads

Connectors

and Unions
Appendix A: Fuse Installation

Note: The Rainin Model RP-1 Peristaltic Pump is shipped from the factory

ready for operation the line voltage of the country of destination.

Use this Appendix only for fuse replacement or installation when necessary. 

If your line voltage is not 110VAC, or when a blown fuse needs replacing, you will

need to install fuses and set the line voltage module in the correct orientation. 

1. Turn off the power switch and remove the power cord.

2. Insert a small screwdriver blade downward into the removal slot at the top

center of the line voltage module. Lever the module out by twisting the

screwdriver.

3. Pull the module away from the rear panel.

4. Select fuses according to your line voltage and the following chart. (Fuses

are supplied in the accessory pack.)

19

Fuse 

Installation

Figure 9 Fuse/Line Voltage Module
MODEL RP-1 FUSE TABLE:

USA 3AG 3/4A 250V Slo-Blo

Europe: 5 x 20 mm .4A 250V T

Note: Two fuses are necessary for operation, one each side of the line voltage module. You will need to pull out the fuse drawers on both sides of

the line voltage module to install or remove the fuses.

5. Insert the fuse by pushing it into the fuse holder until it is firmly seated.

Close the fuse drawer and repeat for the other fuse.

6. Refer to the chart above and install the line voltage module into its socket

in the correct orientation. Gently push the line voltage module until it is

firmly seated in the socket. (Your line voltage should read right way up at

the base of the module with the two arrowheads aligned.)

7. Replace the power cord. The procedure is now complete.

20
Appendix B: Computer Remote

Command Protocols

Any computer with an RS-422 serial interface port can be used to control the

Rainin RP-1 Peristaltic Pump. Interface adapters are commercially available to

convert RS-232 ports to RS-422. Software for controlling the RP-1 from an

external computer must use specific RS-422 protocols, described in the following paragraphs.

The RS-422 bidirectional communications channel allows the computer to

communicate with up to 64 slave devices with unique unit ID numbers, designated as units 0 through 63. The computer communicates with one pump at a

time by transmitting the pump’s unit ID. The pump which recognizes the unit ID

connects to the channel, and any other selected device disconnects. 

All connections are made with 9-pin sub-miniature D-connectors and cabling

as shown in Figure 1. 

Data communication is asynchronous, eight-bit, even parity, consisting of one

start bit, eight data bits, one parity bit and one stop bit. 

RP-1 pumps check for even parity and use even parity when replying. Parity

error causes the pump to disconnect from the RS-422 channel. This can be corrected by reconnecting then restarting the message.

Baud rates are: 600, 1200, 2400, 4800, 9600 and 19200. The clock will run

at 16X the baud rate. RP-1 pumps operate at 600 baud with their internal

clocks. If no clock signal is supplied, the pump will communicate at 19200

baud.

21

Introduction

Description

Physical

Connections

Data Format

Baud rates

1

6

2

7

3

8

4

9

5

1

6

2

7

3

8

4

9

5

1

6

2

7

3

8

4

9

5

1

6

2

7

3

8

4

9

5

PUMP COMPUTER

MF MF

OUT -

OUT +

IN -

IN +

CLOCK IN -

CLOCK IN +

OUT -

OUT +

IN -

IN +

CLOCK OUT -

CLOCK OUT +

9-CONDUCTOR FLAT CABLE

#28 AWG, 0.050 SPACING

CONNECTORS ARE 9-PIN SUBMINIATURE D-TYPE

RESERVED

RESERVED

RESERVED

Figure 10:

RS-422 SIgnal Lines
Before connecting to a particular pump, the computer must first send a disconnect code (255 - FF hexadecimal). The computer waits 20 milliseconds to

allow any active device to turn off its driver. Then the computer sends the

desired pump’s unit ID number as an eight-bit byte with the most significant bit

set (add 128 to the unit ID number).

The pump that recognizes the unit ID connects its transmitter to the communications channel and echoes the unit ID. Any device which does not recognize

the unit ID will disconnect. The active pump will echo its unit ID within 20 milliseconds after receiving it — if no response is received in that time, the computer may assume the pump is unavailable. The selected pump remains connected until the disconnect code or the unit ID of another device is received. 

The connect/disconnect flow chart is shown below.

Two types of commands can be sent via the RS-422 channel; buffered and

immediate. Buffered commands are instructions, and are executed as background processes. Immediate commands are status requests, and are given a

higher priority. The RP-1 will interrupt a buffered command to respond to an

immediate command.

Immediate commands are single-letter status requests with immediate priority.

Buffered commands will be interrupted to complete an immediate command.

Immediate commands (from the following 

RP-1 set:) can be any valid data character except the following: 

1 line-feed (0A hexadecimal)

2 carriage return (0D hexadecimal)

3 pound sign (23 hexadecimal) or

4 NAK (15 hexadecimal)

22

SELECTED DEVICE

IS CONNECTED

START

DISCONNECT

ALL DEVICES

20 MS

 DELAY

SEND SELECTED

UNIT ID NUMBER

UNIT ID

ECHOED

?

20 MS

TIMEOUT

?

ERROR

HANDLER

Y Y

N

N

Figure 9: Connect/

Disconnect Sequence

Commands

Connect/

Disconnect

Sequence
Immediate commands return messages of one or more characters. Each character must be sent within 20 milliseconds after the command character has

been transmitted. The first character is sent as a response to the command. The

computer gets additional characters in response by sending an ACK (6 hexadecimal). The last character of an immediate command has its most significant

bit set to 1. The host computer will not “ACK” it.

Buffered commands consist of an ASCII string of one or more characters preceded by a line feed <LF> (0A hexadecimal) and followed by a carriage return

<CR> (0D hexadecimal). The pump echoes with a line feed <LF> if ready for

a command and with a pound sign <#> (23 hexadecimal) if not ready. If not

ready, the computer retries sending the line feed until the pump echoes a line

feed. 

Once the pump echoes the line feed, each subsequent character will be echoed

if there is no error. If there is an error, no echo will be made and the pump will

disconnect from the channel. If the computer is checking echoes and receives

one with an error, it can send a NAK (15 hexadecimal) and the pump will

retransmit the character.

The pump can be “locked” (put into “Remote” with the “L” buffered command.

When the pump is unlocked, it will ignore all buffered commands except the “L”

command.

A List of the RP-1 immediate and buffered commands follows:

Command Mode Description

I I Request Contact Input Status

Return: “ab”

where “a” reflects pin 3 (START/STOP input) and “b” reflects pin 1

(CW/CCW input)

The allowable values are:

“1” for an inactive or high input (open)

“0” for an active or low input (closed)

Default response: “11”

Command Mode Description

R B Set a new speed

“Rn”

where “n” is a 1-4 digit integer interpreted as the value of the new speed

in hundredths of a revolution per minute. Example: “R1250” means

12.5 r.p.m. This command changes the speed of the pump if the mode

is in Remote control. If the speed given requires an increase in rotation

rate, a ramp is calculated and executed. If the new speed is less than

the present rotation rate, the effect is almost immediate. 

23

Command

List
Where direction (‘j’ command) and speed (‘R’ command) are to be

used, this ‘R’ command should precede the ‘j’.

See note at end of this document on how to set RPM given tubing type,

inside diameter, and desired flowrate.

Command Mode Description

R I Read Display

Return: “dXX.XXca”

Where “d” is the direction status

“ “ a space if stopped

“+” if CW

“-” if CCW

“XX.XX” is the speed status in rpm

“48.00” at full speed

“c” is the control status

“K” if started through the keypad

“R” if started through the contacts

or set to remote mode through GSIOC

“a” is the autostart condition

“*” if in autostart condition (display flashing)

“ “ a space if not in autostart

Default return: “ 12.50K “ when the pump is new.

S B Set the mode

“SK” for Keypad control

“SR” for Remote control

Any other letter following the S is ignored. If the pump has been enabled

by the Run signal on its back panel, the pump will ignore this command

to change mode. The computer should check the results of this com- mand by issuing the ‘?’ command.

Command Mode Description

V I Request Analog Input Status

Return: “vvv”

Where “vvv” is a 3 digit decimal number ranging from 000 to 255. A

response of 255 corresponds to 5V or open circuit.

The last character of the returned message has its high bit set.

Command Mode Description

! B Set Select Code

“!nn”

Where “nn” is the new select code for this instrument. The new code

can range from 00 through 63. This command instructs the instrument

to immediately change its select code because it will be selected through

this new code for all future commands. The pump must be locked for

this command to have any effect.

24
Command Mode Description

% I Module Identification

Return: “RP1V1.x”

Identifies the pump as a RP1 pump

(Note: Should be V1.9 or larger. If not, call 

Technical Service, 800-543-4030 for newer chips.)

Command Mode Description

j B Set Direction

“jF” for forward (CW),

“jB” for Backwards (CCW)

Sets pump’s motor direction. Can be read in ‘d’ field of ? command. This

command has the “side effect” of starting the pump - just as the circular arrow keys do from the front panel. If the pump is stopped, this command will start it rotating at the currently defined rate. If the pump is

already rotating in the direction specified by this command, this command has no effect. If the pump is rotating, this command will reverse

the pump’s direction. The ‘R’ command, used to set the rotation rate,

should precede this command.

Command Mode Description

L B Lock. Enable Remote Control

Only the Stop key remains active. Pushing it once is enough to generate a “Panic Stop” condition.

Command Mode Description

U B Unlock. Exit Remote Control

Releases the pump from remote control, returning control to the keyboard. 

Command Mode Description

? I Request Status

Return: “ceds”

where 

“c” is control status: “K” is for keypad mode, “R” is for remote mode, “X”

is External Input Mode (from back panel). 

“e” is for Error status. This is normally a blank. If the Stop key is hit, this

field becomes ‘S’. Once read by this command, it returns to being a

blank again.

“d” is direction of rotation: “F” for forward (CW when viewed from above)

and “B” for backwards (CCW)This definition does not require the pump

to be running.

“s” is “S” for stop (no motion), or “F” for flowing (rotating). This is independent of the panic stop error logic. 

25
26

Because the command buffer is 40 characters long, a buffered command string

can be as long as 39 characters, the last character being the CR (carriage

return) ASCII code.

Note: Users want to set flowrates in mL/min while the pump must be controlled

in RPM. For the conversion, the computer will need to know the tubing material, inside diameter, and flowrate at some specified RPM. This information is

contained in the table below. Note that the conversion factor, RPM per unit

flowrate, can be obtained by dividing the MaxRPM (always 48 RPM for this

pump) by the “Max” flowrate value listed in the user manual column of that

name. For Polyvinyl Chloride (PVC) tubing of inside diameter 0.25 mm, the

Max flowrate listed is 0.33 mL/min (this value presumes 48 RPM). The computer will need to form a conversion factor of 48 / 0.33 or 144 (for this userspecified tubing). When the user’s method asks for a flowrate of 0.2 mL/min,

for example, the computer will have to calculate an RPM value of 0.2 x 144,

or 28.8 RPM. The corresponding ‘R’ command would then appear as ‘R2880’.

Mat’l Tubing Cat. No. ID, mm Max flow Color Code

Length, (In) at 48rpm (mL/min)

PVC 14 39-620 0.25 0.33 Orn/Blue

PVC 14 39-621 0.38 0.66 Orn/Green

PVC 14 39-622 0.50 1.13 Orn/Yel

PVC 14 39-623 0.63 1.6 Orn/White

PVC 14 39-624 0.76 2.2 Black

PVC 14 39-625 1.52 8.3 Yel/Blue

PVC 14 39-626 2.29 17.2 Pur/Blk

PVC 14 39-627 2.8 24.6 Pur/Wht

PVC 14 39-628 3.16 28.2 Blk/White

Silicone 14 39-660 0.25 0.26 Orn/Blue

Silicone 14 39-661 0.38 0.6 Orn/Green

Silicone 14 39-662 0.50 0.95 Orn/Yel

Silicone 14 39-663 0.63 1.5 Orn/White

Silicone 14 39-664 0.76 2.0 Black

Silicone 14 39-665 1.52 7.4 Yel/Blue

Silicone 14 39-666 2.29 15.4 Pur/Blk

Silicone 14 39-667 2.8 20.6 Pur/White

Viton 7 39-640 0.50 0.62 Orn/Yel

Viton 7 39-641 0.63 0.94 Orn/White

Viton 7 39-642 0.76 1.2 Black

Viton 7 39-643 1.42 4.7 Yellow

Viton 7 39-644 2.28 11.8 Pur/Blk

Viton 7 39-645 2.79 15.8 Pur/White
Notes:

27
LIMITED WARRANTY

SEE THE ENCLOSED LIMITED WARRANTY AND LIMITATIONS OF LIABILITY STATEMENT.

Contacting RAININ

Technical Information:

T: 800-543-4030 F: 510-564-1617 tech.support@rainin.com

Service:

T: 800-662-7027 F: 781-935-7631 service@rainin.com

Direct Order Line:

T: 800-472-4646 F: 510-564-1617 pipets@rainin.com

RAININ website: www.rainin.com

From outside North America: T: +1-510-564-1600

global@rainin.com (from outside the U.S.)

METTLER TOLEDO Offices

METTLER TOLEDO website: www.mt.com/rainin

Mettler-Toledo (Schweiz) GmbH, Im Langacher , 8606 Greifensee CH

Verkauf 044 944 45 45 salesRN.ch@mt.com

Service 044 944 47 47 serviceRN.ch@mt.com

Mettler Toledo GmbH, Ockerweg 3 , 35396 Giessen DE

Verkauf +49 641 507 222 info.mtd@mt.com

Service +49 641 507 307 info.mtd@mt.com

Mettler-Toledo SAS, 18-20 avenue de la Pépinière , 78220 Viroflay FR

Ventes 01 30 97 17 17 marcom.fr@mt.com

Laboratoire d'Etalonnage Accrédité, 

264 rue Abraham Lincoln Service Pipette, 62400 Bethune FR

Service 03 21 64 54 66 marcom.fr@mt.com

N.V. Mettler-Toledo S.A., Leuvensesteenweg 384 , 1932 Zaventem BE

Sales +32 2334 0211 general.mtb@mt.com 

Service +32 2334 0211 general.mtb@mt.com

Mettler-Toledo S.A.E., Miguel Hernández 69-71 , 08908 L'Hospitalet de Llobregat (Barcelona) ES

Ventas 0034 93 223 7666 mtemkt@mt.com

Servicio Técnico 0034 93 223 7666 mtemkt@mt.com

Mettler-Toledo A/S, Naverland 8 , 2600 Glostrup DK 

Salg 43 27 08 25 info.mtdk@mt.com

Service 43 27 08 25 info.mtdk@mt.com

Rainin Instrument, LLC

7500 Edgewater Drive, Box 2160, Oakland, CA 94621-0060

a METTLER TOLEDO Company

Prices and specifications are subject to change without notice.

RAININ is a registered trademark of Rainin Instrument, LLC.

Copyright 2007, Rainin Instrument, LLC.

9920-179 Rev E