Cole-Parmer 1202, 1201 Operating Instructions

Linear Recorders

Model 1201/Model 1202

Operating Instructions

0115-0094 • 2/15/96

1

Table of Contents

Safety Information .............................................................................................................................................. 3

Warnings.........................................................................................................................................................3

Introduction ........................................................................................................................................................ 4

Warranty Card................................................................................................................................................. 4

Initial Inspection .............................................................................................................................................. 4

Return Requests/Inquiries .............................................................................................................................. 4

Description...................................................................................................................................................... 5

General ........................................................................................................................................................... 6

Servo System ................................................................................................................................................. 6

Specifications ..................................................................................................................................................... 6

Chart Drive System......................................................................................................................................... 7

Options............................................................................................................................................................ 7

Setup Procedure ................................................................................................................................................ 8

Power Requirements ...................................................................................................................................... 8

Chart Paper Installation .................................................................................................................................. 8

Pen Installation ............................................................................................................................................. 10

Grounding ..................................................................................................................................................... 10

Input Signal Connections.............................................................................................................................. 11

Recording Procedure ....................................................................................................................................... 13

Manual Paper Advance/Rewind ................................................................................................................... 14

Special Features .............................................................................................................................................. 15

Separate Pen Event Marker - Standard........................................................................................................ 15

Remote Chart On/Off - Standard .................................................................................................................. 15

Electric Pen Lift - Standard ........................................................................................................................... 15

Override Event Marker - Standard................................................................................................................ 15

Remote Chart Programming/TTL - Standard................................................................................................ 16

Pulse Train Specifications: ........................................................................................................................ 16

Paper Tear Off Bar - Standard...................................................................................................................... 17

Forward/Reverse Chart Drive - Standard ..................................................................................................... 17

General Theory ................................................................................................................................................ 18

Pen Drive System ......................................................................................................................................... 18

Chart Drive System....................................................................................................................................... 18

Dc Power Supply .......................................................................................................................................... 19

Calibration ........................................................................................................................................................ 20

Power Supply................................................................................................................................................ 20

Chart Drive System....................................................................................................................................... 20

Pen Drive System ......................................................................................................................................... 20

Operational Tips And Maintenance.................................................................................................................. 26

Troubleshooting ............................................................................................................................................... 27

Chart Drive Section....................................................................................................................................... 27

Analog Section.............................................................................................................................................. 28

Accessories................................................................................................................................................... 29

Replacement Parts ....................................................................................................................................... 29

Parts and Accessories ..................................................................................................................................... 29

Ordering Procedures........................................................................................................................................ 30

Wiring Diagram ................................................................................................................................................ 31

One Year Limited Warranty.............................................................................................................................. 32

2

Safety Information

Alert Signals

Warning

Warnings alert you to a possibility of
personal injury .

Caution

Cautions alert you to a possibility of
damage to the equipment.

Note

Notes alert you to pertinent facts and
conditions.

Your Linear Recorder has been designed with
function, reliability and safety in mind. It is your
responsibility to install it in conformance with
local electrical codes. For safe operation, please
pay attention to the alert signals throughout the
manual.

Warnings

To avoid electrical shock, always:

1. Use a properly grounded electrical
outlet of correct voltage and current
handling capacity.

2. Disconnect from the power supply
before servicing.

To avoid personal injury:

1. Do not use in the presence of
flammable or combustible materials; fire
or explosion may result. This device
contains components which may ignite
such materials.

2. Refer servicing to qualified personnel.

3

Introduction

Warranty Card

Please fill in and return the Warranty Registration
card so we may validate the beginning date of
the warranty period.

Initial Inspection

The recorder should be inspected for shipping
damage immediately after unpacking. If any
damage is found, please notify the carrier and the
Barnstead|Thermolyne Customer Service
Department.

If the recorder fails to operate properly, check
all connections and switch settings and insure
that the plug-in connector is firmly seated in
place. Also check the setup Procedure contained
in the manual before calling the
Barnstead|Thermolyne Customer Service
Department.

Do not return recorder for warranty service
without specific authorization from the
Barnstead|Thermolyne Customer Service
Department.

Return Requests/Inquiries

Return requests, service or other inquiries should
be made directly to the Barnstead|Thermolyne
Customer Service Department.

To avoid lengthy delays in processing orders or
correspondence regarding your recorder, please
include the Model Number, Serial Number,
Options and Place of Purchase.

4

INTRODUCTION

Description

The Model 1200 Recorder is a multi-range
potentiometric, null balance servo recorder which
will provide an accurate, permanent, graphic
record of the input signal.

This graphic recorder may be used in many
different applications in the medical, teaching and
industrial fields where a precision instrument is of
utmost importance.

Measurement of DC voltage, current,
temperature and a variety of other variables is
made possible with the use of this recorder.

5

Specifications

General

1. Number of Channels: ....... Model 1201 - One; Model 1202 - Two.

2. Chart Width: ..................... 200mm Writing Width

3. Writing Method: ................ Disposable fiber tipped pen with self contained ink supply

4. Accuracy:.......................... Deadband: less than ± 0.1%.

Linearity: less than ± 0.5%.
Repeatability: less than ± 0.1%.

5. Zero Adjust: ...................... Continuous + 100% to - 100%

6. Power Requirements:....... 115/230 VAC ± 10%, 50/60 Hz, Single Phase

7. Wattage: ........................... Model 1201 - 17.5 watts max

Model 1202 - 22.5 watts max

8. Fuse: ................................ 115 VAC - 3AG Slo-Blo 0.3a (2)

230 VAC - 3AG Slo-Blo 0.15a (2)

9. Line Filter:......................... Grounded electrostatically shielded power transformer

10. Weight: ............................. Model 1201 - 9 lbs (4.1 Kg)

Model 1202 - 11 lbs (5 Kg)

11. Dimensions:...................... 15" (38.1cm) W (incl. knob) x 4.38" (11.13cm) H x 10.5"

(26.7cm) D

12. Accessories Furnished: .... Pen(s); One roll chart paper; Operators Manual; Paper

Feed Spool; Two 0.15a Fuses (230 VAC operation)

Servo System

1. Pen Drive:......................... Patented (U.S. Patent No. 4,146,828) Pulse Modulated

System

2. Input Type: ....................... Single Ended, Floating

3. Input Impedance:.............. 2.5 megohms, fixed

4. Input Filtering:................... Filters noise above 3 Hz

5. Full Scale Response: ....... Less than 0.25 seconds

6. Full Scale Spans: ............. 12, switch selectable:

Ranges ............................. 1mV, 10mV, 100mV, 1V

2mV, 20mV, 200mV, 2V
5mV, 50mV, 500mV, 5V

7. Overshoot:........................ None. System critically damped

8. Zero Shift Tempco:........... Less than 0.1% per degree C

9. Calibration: ....................... Front panel all ranges (with external reference)

10. Overrange Protection: ...... Shutdown approximately 6 seconds after + or - overrange

6

SPECIFICATIONS

11. Event Marker: ................... Electronic override - Approximately ± 4% spike and

separate pen, electric solenoid actuated

12. Pen Lift: ............................ Manual external lever and electric solenoid actuated

Chart Drive System

1. Chart Drive: ...................... Four phase stepper motor.

2. Chart Speeds: .................. 16 switch selectable metric:

1, 2, 3, 6, 10, 15, 20 and 30 cm/min and cm/hr.

NOTE: Chart speeds are whole number reciprocals to facilitate use in sec/cm and min/cm

ranges.

3. Chart Speed Accuracy: .... Less than ±0.03% error.

4. Chart Programming: ......... Contact closure or TTL/CMOS.

5. Paper Reverse: ................ External knob and electrical

Options

See “Special Features”, Page 15.

7

Setup Procedure

Warning

Use a properly grounded
electrical outlet of correct
voltage and current handling
capacity.

Disconnect from the power
supply before servicing.

Note

The recorder must be
disconnected from the AC
power source and caution must
be used in removing and
replacing the bottom cover to
prevent damage to internal
wiring and electronic
components.

Power Requirements

Recorders are shipped ready to operate on a
nominal AC voltage of 115VAC. Conversion can
be made to 230VAC by moving a slide switch
(inside the instrument) to the proper position and
installing the correct fuses (0.15a). See Figure 4
for access.

Chart Paper Installation

See Figures 1, 2 and 3

1. Place the REC/STBY switch(es) in the
STBY position.

2. Place the Cm/Min-OFF-Cm/Hr switch in
the OFF position.

3. Turn the power ON and place the pen(s)
in the LOAD position using the ZERO
control (fully clockwise) and lift the
pen(s) with the pen lift lever.

8

SETUP PROCEDURE

4. Remove the masking tape from a new
roll of paper and make an 8 inch long
“V” in the beginning of the paper.

5. Load the chart paper into the rear of the
recorder after installing the Paper Feed
Spool. (Taped in place on the rear of the
recorder).

6. Feed the “V” through the space between
the paper hold down and the chassis,
and under the Tear-Off bar, using the
paper advance/rewind knob to assist
loading.

7. Check for proper hole and slot
engagement with the sprockets to insure
that the paper is not cocked. The chart
grids should be parallel with the paper
Tear-Off bar and the paper should move
smoothly and freely.

9

SETUP PROCEDURE

Pen Installation

1. With the pen holder(s) in the LOAD or
UP position, remove the cap from the
short nib pen and slide the pen into the
holder as far as possible.

2. On two pen models, insert the long nib
pen into the upper pen holder in the
same manner. There should be no
interference between the pens.

Caution

Do not connect the Power
Ground (PWR GND) terminal
(1TB1 or 2TB1) to either the
Signal Ground (SIG GND) (-)
or the Chassis Ground terminal
as damage to the recorder may
occur.

Grounding

For best performance, the green (or green and
yellow) ground wire in the power cord for the
recorder and the signal source should share a
common “water pipe” ground. The green (green
and yellow) wire in the power cord is connected
to the recorder ground (chassis), but not to the
signal input. If the signal input does not have a
third wire in its power cord, or if the instrument is

10

SETUP PROCEDURE

not grounded, connect a wire between the
recorder ground terminal and the chassis of the
signal source.

In case of large normal mode signals,

particularly 120 Hz, connect the recorder ground
terminal to the source of the normal-mode signal,
or to the negative (-) recorder input terminal.

Input Signal Connections

See Figure 3.
This instrument requires a DC voltage input.

Signal sources with current outputs will require a
shunt resistor across the + and - input terminals.
Ohms Law may be used to compute the proper
value for a given input range. The formula is:

R = E
I

Where: E is the recorder span (range) selected

in Volts, I is the maximum current signal to be
recorded in Amps, and R is the resistance of the
shunt resistor in Ohms.

1. Electrical connections are made as
follows:
Signal source Positive to recorder (+)
terminal
Signal source Negative to recorder (-)
terminal

2. Right hand zero is standard on this
recorder. However, either right or left
hand zero may be used. (Zero can be
switched electronically at the factory.)

A. Positive going input signals:

11

SETUP PROCEDURE

1.For RIGHT hand zero, adjust
pen(s) to the right side of the chart
with the zero control(s). The pen(s)
will now drive to the left.

2.For LEFT hand zero, adjust
pen(s) to the left side of the chart
with the zero control(s). Reverse
the input signal connections on the
rear of the recorder (POSITIVE
input to (-) terminal and NEGATIVE
input to (+) terminal). The pen(s)
will now drive to the right. (May be
noisy).

B. Negative going input signals:

1.For RIGHT hand zero, adjust
pen(s) to the right side of the chart
with the zero control(s). Reverse
the input signal connections on the
rear of the recorder (POSITIVE
input to (-) terminal and NEGATIVE
input to (+) terminal). The pen(s)
will now drive to the left. (May be
noisy).

2.For LEFT hand zero, adjust
pen(s) to the left side of the chart
with the zero control(s). Connect
the signal input with the POSITIVE
to (+) and the NEGATIVE to (-).
The pen(s) will now drive to the
right.

12

Recording Procedure

See Figures 1, 2 and 4.

Warning

Do not use in the presence of
flammable or combustible
materials; fire or explosion may
result. This device contains
components which may ignite
such materials.

Note

When switching from one input
range (span) to another, the
pen zero should be checked
and adjusted if necessary.

“OSC OUT” and “CHART
PROG” terminals of Terminal
board 1TB1 (on bottom of
recorder) must be jumpered
together, unless remote chart
control is used, or the chart
drive will NOT function.

With chart paper and pen(s) installed and the
recorder plugged into the proper AC source
(corresponding to the voltage conversion slide
switch inside the recorder), perform the following
steps for routine recording:

1. Check that the REC/STBY switch(es)
are in the STBY position, the power is
ON, and the input signal is properly
connected.

2. Set the INPUT RANGE and mV/V
switch(es) to the desired input range
(span).

3. Set the CHART SPEED and CM/
MIN-OFF-CM/HR switch to the desired
chart speed.

4. Adjust pen(s) to the proper zero position
using the ZERO control(s).

5. Set the REC/STBY switch(es) to REC
and proceed with your recording.

13

RECORDING PROCEDURE

Manual Paper Advance/Rewind

The paper may be manually positioned as
desired at any time using the advance/rewind
knob on the right side of the recorder. For
electrically reversing the chart see page 17.

14

Special Features

Separate Pen Event Marker ­Standard

Uses a separate pen assembly to provide a step
mark at the left edge of the chart when a contact
closure is made between “EVENT MARKER” and
“SIG GND” of 1TB1 on the bottom panel.

Note

The jumper between “OSC
OUT” and “CHART PROG”
must be removed for remote
operation and reinstalled for
normal operation.

Note

Do not connect to “PWR GND”
terminal as damage may occur.

Remote Chart On/Off - Standard

Provides the ability to turn the chart on and off
from a remote location when a contact closure is
made or broken between “OSC OUT” and
“CHART PROG” of 1TB1 on the bottom panel.

Electric Pen Lift - Standard

Raises the pen(s) off the chart when a contact
closure is made between “PEN LIFT” and “SIG
GND” of 1TB1 on the bottom panel.

Override Event Marker ­Standard

Produces approximately a ± 4% “glitch” in the
analog pen trace when a contact closure is made
between “OVERRIDE EVENT” and “SIG GND” of
1TB1 (Lower Pen) and of 2TB1 (Upper Pen).

15

SPECIAL FEATURES

Note

The jumper between “CHART
PROG” and “OSC OUT” must
be removed for remote
programming.

Remote Chart Programming/TTL

- Standard

The recorder chart drive system is designed to
operate from an external frequency source,
including TTL levels. The chart can be run at time
rates other than those built into the recorder. This
mode can be obtained by applying a pulse train
(see below) to the “CHART PROG” and “PWR
GND” terminals of 1TB1 on the bottom of the
recorder.

Pulse Train Specifications:

Note

Change of external frequency
affects all selector speeds by
the same factor.

Note

If the pulse train ground
(common) is the same as the
analog (signal) ground
(common), contact Factory
Customer Service.

0 (low) state voltage is +0.5 Volts or less
1 (high) state voltage is +5 to +15 Volts maximum
Minimum pulse width is 100 microseconds

Chart Speed Formula:
Chart Speed = F
250Hz
F = External frequency in Hz
S = Selected chart speed

When the external frequency is set to 250 Hz,
the chart drive will run at speeds marked on the
front panel selector switch.

If the external frequency is decreased by 10%
of the standard 250 Hz rate, the actual chart
speed will be 10% slower than the setting on the
front panel selector switch.
EXAMPLE:

The selector is set at 30 Cm/Min and the
external frequency is changed to 225 Hz
(a 10% decrease). The chart will now
run at 27 Cm/Min.

The recommended maximum chart speed for
start-stop operation is 30 Cm/Min. If the
frequency is “swept” (no start-up), it is possible to

X S

16

SPECIAL FEATURES

run faster than 30 Cm/Min; however, sweep rates
must be gradual enough to assure accurate
mechanical tracking.

Paper Tear Off Bar - Standard

Removable clear plastic tear-off bar.

To Remove: Pull UP snap-lock at each end of

bar and remove.

To Install: Insert tabs in holes in platen and

press snap-locks DOWN.

Forward/Reverse Chart Drive ­Standard

Allows remote forward and reverse chart drive

Forward: Pin 8 of 1A1-TB1 open
Reverse: Pin 8 jumpered to Pin 1 (PWR GND)

of 1A1-TB1

17

General Theory

The DC input signal to the recorder is first
filtered, then amplified by the preamplifier to a
level which is less susceptible to noise and
interference. This conditioned signal is then
applied to the pulse servo amplifier which
continuously compares it to the feedback signal
developed by the servo potentiometer.

The difference between these two signals is a
positive or negative error signal that is amplified
and used to drive the servo motor, which is
coupled to the servo potentiometer, in a direction
as to reduce the error signal to zero. Since the
recorder pen is mechanically coupled to the
servo motor and servo potentiometer, its position
on the chart represents an accurate and
continuous record of the input signal (See Figure

5).

Pen Drive System

A DC servo motor is used to control the servo
potentiometer and recorder pen by means of a
gear driven servo drum assembly. The pen is
attached to a drive cable which is wrapped
around and secured to the drum. As the drum
rotates, the pen is moved across the chart
proportionately to the amount of drum rotation.

This recorder uses Linear’s patented pulse
modulated servo to achieve greater accuracy,
linearity and less deadband than conventionally
driven recorders. (U.S. Patent No. 4,146,828).

Chart Drive System

In this simple, reliable system, an internal crystal
oscillator generates pulses which are divided by
integrated circuit logic. The chart speed switch

18

GENERAL THEORY

merely selects the appropriate pulse rate to drive
the stepper motor at the desired speed. (The
crystal frequency is not a function of line
frequency, and chart speeds are therefore
completely independent.)

Dc Power Supply

AC line voltage is reduced by stepdown
transformers and converted to DC by solid state
rectifiers and regulators. A stable DC voltage,
generated by a voltage reference IC, is used as a
reference for the servo potentiometer.

19

Calibration

Note

Procedure given is for a single
pen recorder. Calibration of
dual channel models is
identical except procedure
must be duplicated for second
channel.

This recorder is designed to be simple, reliable,
easy to maintain and repair. Therefore, the
procedure presented here will be as simple, clear
and brief as possible. For special problems, we
recommend that you contact your local
representative or the factory service department.

Power Supply

There are no calibration adjustments in the power
supply.

Chart Drive System

The chart drive system has no calibration
adjustments.

20

Pen Drive System

The calibration covered in this section must be
performed by a qualified technician. The
technician must be aware of voltages which may
cause an electrical shock.

1. Preliminary setup (See Figures 1, 2, 3, 4
And 6)

A. POWER switch to OFF.
B. REC/STBY switch to STBY.
C. mV/V switch to V.
D. INPUT RANGE (Span) switch to 5.
E. Chart MIN/OFF/HR switch to OFF.

F. CHART SPEED switch to 10.
G. Remove bottom cover retaining

screws (4), to allow access to the
calibration adjustments. (See
Figure 4)

H. Check that the jumper is installed

between CHART PROG and OSC
OUT terminals on 1TB1 on bottom
cover.

2. Warm-up Procedure
A. Step 1, Preliminary setup, should

be completed prior to beginning the
warm-up procedure.

CALIBRATION

B. Install paper and pen(s) if not

previously done.

C. Connect power cord to suitable

power source and turn recorder
ON.

21

CALIBRATION

D. Allow a minimum warm-up time of

30 minutes before proceeding with

calibration.
E. Set pen to DOWN with pen lever.
F. Adjust pen to approximately

mid-scale using the ZERO control.
G. Set chart MIN/OFF/HR switch to

MIN.

3. Gain (See Figure 4) The gain
adjustment controls the servo loop gain,
or “deadband”, of the recorder. If set too
high, the pen will “buzz”. If set too low,
the pen will be sluggish.

A. Adjust the GAIN control (R-14) on

the servo PCB clockwise until the
pen Buzzes”, then back off
counterclockwise until the “buzzing”
just stops plus 1/8 turn.

B. Recheck the adjustment by moving

the pen over the full scale using the
ZERO control. If the pen “buzzes”
at any point, turn the GAIN control
counterclockwise until the “buzzing”
stops.

4. Offset (See Figure 6) This adjustment
reduces the zero shift between input
ranges (spans) to a minimum value.

A. Perform Steps 1, 2 and 3 of the

Calibration Procedure before
making the Offset adjustments.

B. Set the REC/STBY switch to STBY.

22

C. Set the mV/V switch to mV.

CALIBRATION

D. Set the pen to 50% on the chart

using the ZERO control.

E. Set the INPUT RANGE switch to 1

MV.

F. Return the pen to the setting in step

“E” (50%) with the Eo (R-15) pot on

the Control Panel PCB.
G. Set the mV/V switch to V.
H. Reset the pen to the setting in step

“G” (50%) with the Io (R-6) pot on

the Control Panel PCB.
I. Set the INPUT RANGE switch to 5

V.
J. Repeat steps “D” through “J” until

minimum (±0.5% maximum) pen

movement is achieved.
K Set the mV/V switch to mV.
L Set the INPUT RANGE switch to 1

MV.
M. Set the pen to zero on the chart

with the ZERO control.

5. Span (Range) Calibration (See Figures
1, 2, 3, 4 and 6.)

This procedure provides adjustment of
the recorder so that a calibrated full
scale input signal will move the pen the
full width of the chart.

23

CALIBRATION

A. Steps 1 through 4 of the Calibration

Procedure must be performed
before range calibration can be
accomplished.

B. Connect a 0.1% accuracy DC

millivolt source to the (+) and (-)
signal input terminals on the rear
panel.

C. Set the DC millivolt source to 0

millivolts ±0.1%.
D. Set the REC/STBY switch to REC.
E. Reset the pen to zero ±0.1% with

the ZERO control.
F. Input a 1 mV ±0.1% signal.
G. Adjust the CAL pot (R-26) on the

Front Panel for a pen setting of

100% ±0.1% on the chart.
H. Set the mV/V switch to V.
I. Set the INPUT RANGE switch to

.1V.
J. Set the DC millivolt source to 0

millivolts ±0.1%.
K. Reset the pen to zero ±0.1% with

the ZERO control.
L Input a 100mV ±0.1% signal and

adjust R-4 on the Control Panel for

100% ±0.1% on the chart. (See

Figure 6)

24

CALIBRATION

M. Check all other input ranges with

the appropriate inputs to insure

range tracking calibration of ±0.5%
N. Set the REC/STBY switch to STBY.
O. Turn the recorder OFF and

disconnect the power cord from the

power source.
P. Disconnect the DC millivolt source

from the (+) and (-) input terminals.
Q. Carefully reinstall the bottom cover

on the recorder.

The recorder is now calibrated and ready for

normal recording.

25

Operational Tips And
Maintenance

Chart paper and pens have been carefully
matched for optimum writing and minimum

Warning

Disconnect from the power
supply before servicing.

Refer servicing to qualified
personnel.

Note

If the pen is left uncapped for
long periods and dries out, it
may be revitalized by dipping in
water for a few seconds.

“bleed”. Substitutions could cause improper
writing. Keep pen tips covered when not in use to
prolong writing life.

Allow recorder to warm-up for about 30
minutes if high accuracy/stability recording is
desired.

Firm tension on paper roll and correct
alignment of the chart paper holes on the
sprocket teeth are required for proper chart feed.

The exterior surfaces of the recorder should be
cleaned periodically by wiping with a soft damp
cloth. Water may be used to remove ink, etc.;
however, solvents should NOT be used as they
may damage or destroy the finish.

26

Troubleshooting

The modularity and simplicity of this recorder make it possible to isolate the problem area in
many cases. Once you have done this, a quick call to your local representative or dealer
office will bring you needed advice or replacement parts.

While it is impossible to think of every problem possibility, the following chart will give you

suggestions on how to solve the most common recorder problems.

Chart Drive Section

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TROUBLESHOOTING

Analog Section

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Parts and Accessories

Accessories

Description Part No.

Chart Paper

Paper, Roll, 200mm Chart x 25 Meter Length 0100-0026-06

Pens

Long Nib, Black (1202 Only) 0100-0111-06
Long Nib, Red (1202 Only) 0100-0110-06
Long Nib, Blue (1202 Only) 0100-0109-06
Short Nib, Black 0100-0107-06
Short Nib, Red 0100-0106-06
Short Nib, Blue 0100-0105-06

Manual, Instruction (Additional Copies) 0115-0094

Replacement Parts

Pulse Servo PCB Assembly (Upper Pen) (1202 Only) 9816-0038
Pulse Servo PCB Assembly (Lower Pen) 9816-0060
Control Panel PCB Assembly - Model 1202 9814-0039
Control Panel PCB Assembly - Model 1201 9814-0038
Cable, Pen Drive 6030-0001
Fuse, 3AG, 0.3a Slo-Blo (115 VAC) 5120-0006
Fuse, 3AG, 0.15a Slo-Blo (230 VAC) 5120-0007
Potentiometer, Servo (Rebalance) 4750-0037
Motor, Chart Drive Assembly (Without Gear) 9501-3255
Motor, Servo Drive Assembly (Without Gear Assembly) 9501-2156

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Ordering Procedures

Please refer to the Specification Plate for the complete
model number, serial number, and series number when
requesting service, replacement parts or in any
correspondence concerning this unit.

All parts listed herein may be ordered from the
Barnstead|Thermolyne dealer from whom you purchased
this unit or can be obtained promptly from the factory.
When service or replacement parts are needed we ask
that you check first with your dealer. If the dealer cannot
handle your request, then contact our Customer Service
Department at 319-556-2241 or 800-553-0039.

Prior to returning any materials to Barnstead|Thermolyne
Corp., please contact our Customer Service Department
for a “Return Goods Authorization” number (RGA).
Material Returned without an RGA number will be
returned.

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Wiring Diagram

31

One Year Limited Warranty

Barnstead|Thermolyne Corporation warrants that if a product manufactured by Barnstead|Thermolyne and
sold by it within the continental United States or Canada proves to be defective in material or construction, it
will provide you, without charge, for a period of ninety (90) days, the labor, and a period of one (1) year, the
parts, necessary to remedy any such defect. Outside the continental United States and Canada, the warranty
provides, for one (1) year, the parts necessary to remedy any such defect. The warranty period shall
commence either six (6) months following the date the product is sold by Barnstead|Thermolyne or on the
date it is purchased by the original retail consumer, whichever date occurs first.

All warranty inspections and repairs must be performed by and parts obtained from an authorized
Barnstead|Thermolyne dealer or Barnstead|Thermolyne (at its own discretion). Heating elements, however,
because of their susceptibility to overheating and contamination, must be returned to our factory, and if, upon
inspection, it is concluded that failure is not due to excessive high temperature or contamination, warranty
replacement will be provided by Barnstead|Thermolyne. The name of the authorized Barnstead|Thermolyne
dealer nearest you may be obtained by calling 1-800-446-6060 (319-556-2241) or writing to:

Barnstead|Thermolyne

P.O. Box 797

2555 Kerper Boulevard

Dubuque, IA 52004-0797

USA

FAX: [phone]

E-MAIL ADDRESS: [e-mail]

Barnstead|Thermolyne’s sole obligation with respect to its product shall be to repair or (at its own discretion)
replace the product. Under no circumstances shall it be liable for incidental or consequential damage.

THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TO Barnstead|Thermolyne
PRODUCTS. Barnstead|Thermolyne EXPRESSLY DISCLAIMS ANY AND ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR USE.

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