Fisher Scientific Isotemp 11-800-49S/.57A User manual

1
Instruction Manual for Fisher Isotemp®
Digital Stirrers, Hotplates, and Stirring
Hotplates
Voltage Cat#/Amps
Stirring
Cat#/ Amps
Heating
Cat#/ Amps
Heating/Stirring
120V
100V
230V CE
230V UK
11-800-49S/ .57A
11-801-49S/ .7A
11-802-49S/ .27A
11-802-50S/ .27A
11-800-49H/ 7.5A
11-801-49H/ 9.1A
11-802-49H/ 4.2A
11-802-50H/ 4.2 A
11-800-49SH/ 7.5A
11-801-49SH/ 8.4A
11-802-49SH/ 4.1A
11-802-50SH/ 4.1A
120V P
100V P
230V CE P
230V UK P
11-800-49HP/ 7.5A
11-801-49HP/ 9.1A
11-802-49HP/ 4.2A
11-802-50HP/ 4.2 A
11-800-49SHP/ 7.5A
11-801-49SHP/ 8.4A
11-802-49SHP/ 4.1A
11-802-50SHP/ 4.1A
P: Models with external thermal sensor provided.
CE: Designates a Continental European plug.
UK: Designates a United Kingdom plug.
100 &120 volt models operate at 60 hertz, 230 volt models operate at 50
hertz.
Introduction:
Your Fisher Isotemp stirrer, hotplate, or stirring hotplate is a general purpose
heating and/or stirring device intended for general indoor laboratory procedures.
The unit is available as a stirrer , hotplate, or stirring hotplate. (Although the unit
is available in three different configurations, the operation of the heat and stir
controls remains the same.
Heat and stir speed are accurately controlled to maintain the set temperature and
stirring speed. Heat and stir speed are easily set by simple controls on the front
panel. Temperature can be precisely set in 1 degree increments between 30°C
(86°F) and 550°C (1022°F). Temperature can be displayed in degrees Centigrade
or Fahrenheit. Both set and actual temperature are displayed. During operation
and after the heat is turned off, the hot top indicator lights if the top is too hot to
touch (>40°C/104°F).
An optional immersion probe allows direct, precise control of the temperature
from inside the solution. This chemical-resistant probe can be used to monitor
actual solution temperature when stirring temperature-sensitive samples. A
standard support rod can be attached to the unit for mounting the temperature
probe, as well as a thermometer, electrode, or buret.
Stirrer speed can be set in 1 RPM increments between 60 and 1200 RPM
(revolutions per minute). The unit automatically adjusts motor strength to
accommodate aqueous, viscous, or semi-solid solutions. Set and actual stir speed
are displayed. Included with stirring units is a 5/16-inch diameter by 2 inch long
(0.8 x 5.1 cm) Teflon-coated stir bar.
The unit ceramic top plate that measures 7x7 inches. The ceramic top stays flat
even at maximum temperature for uniform heating. The ceramic top also resists
acids and alkalis, and is easy to clean. Its reflective white surface allows easy
visualization of contrasts within the sample. The unit’s rugged cast-aluminum
base enhances its stability on the bench top. The overall low-profile design
makes the unit easy to use in a hood.
Note: Use vessels with flat bottoms for the best heat transfer. Avoid metal
containers, sandbaths, or vessels with a rim around the bottom as these could
damage the ceramic top plate.
Symbols:
The following symbols are used in these instructions and on the device:
Indicates that user must read and understand the instructions.
Indicates that the surfaces may be hot.
Indicates a shock hazard from dangerous voltage.
Safety Information:
The equipment must be used as described in this manual. If used in a manner
other than described in this manual, protection provided by the device may be
impaired.
User must completely read, understand, and follow the instructions in this
manual before operating this equipment. This equipment is for indoor use only.
Your stirrer, hotplate, or stirring hotplate has been designed with function,
reliability, and safety in mind. It is the user’s responsibility to install it in
conformance with local electrical codes.
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 prior to maintenance and 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. Space unit at least 6 inches away from any combustible materials under all
conditions.
3. Use caution when heating volatile materials; top surface and element can
reach the flash point temperature of many chemicals. These hot plates and
stirring hot plates are not explosion proof. Fire or explosion may result.
Unit contains components which may ignite such materials.
4. Keep top surface clean. Use a non-abrasive cleaner. Alkali spills,
hydrofluoric acid spills or phosphoric acid spills may damage top and lead
to thermal failure. Unplug unit and remove spills promptly. Do not
immerse unit for cleaning.
5. Replace the top immediately if damaged by etching, scratching or chipping.
A damaged top can break in use.
6. DO NOT USE METAL FOILS OR CONTAINERS, INSULATING
MATERIALS (e.g. sand baths), or LOW MELTING POINT GLASS (e.g.
soda lime glass) CONTAINERS on hotplate. Ceramic plate can be
damaged creating shock hazard.
7. Do not remove or modify grounded power plug. Use only properly
grounded outlets to avoid shock hazard. Not rated for use in hazardous
atmospheres.
8. Use appropriate hand and eye protection when handling hot containers
and/or hazardous chemicals.
9. Unit should set on a dry surface. Do not set in a puddle of liquid.
10. Refer servicing to qualified personnel.
WARNING:
This product contains refractory fiber, insulation which can produce respirable
fibers and dust when unit is disassembled. These fibers or dusts can cause
irritation and can aggravate pre-existing respiratory disease. The insulating
materials are located in the top plate assembly. There may be a risk of exposure
to respirable dusts or fibers when repairing or maintaining the insulating
materials in a manner which causes the release of dust or fibers. Refer servicing
to qualified personnel.
Qualified personnel should consult the appropriate Material Safety Data Sheets
(MSDS’s) for such products with respect to proper handling and appropriate
protective equipment..
Note: This unit contains materials which may emit a slight odor or smoke during
initial operation. This will dissipate within an hour and will not affect the
operation or performance of the hotplate.

Instruction Part # 104612 Rev. B Technical Service: 1-800-926-0505
Fisher Scientific Co. LLC Customer Service: 1-800-766-7000
2
Environmental Requirements:
WARNING:
Do not use in highly corrosive atmospheres; corrosive fumes and
spills may damage top and internal components, creating shock
hazard.
Ambient Temperature: 10-40°C
Relative Humidity: 0 to 90% (non-condensing)
Maximum Altitude: 2000 M
Pollution Degree: 2
Over-voltage Category: II
Main supply voltage fluctuations not to exceed ±10% of rated
voltage.
Packing List:
Each stirrer, hotplate, or stirring hotplate comes complete with an
instruction sheet and warranty card. Each stirring unit is supplied
with one stir bar.
Controls and Indicators:
The unit contains the following controls and indicators:
(Depending on which unit you have, some of the functions
described may not apply to your unit.)
Power Indicator: Lights when unit is plugged in and power is
being supplied to the unit. There is no separate power switch.
Reset Key: Resets set stir speed and temperature to minimum.
C/F Key: Sets the indicated temperature in degrees Centigrade or
Fahrenheit.
Hot Top Indicator: Lights when the temperature of the top surface
is above 40°C and is no longer safe to touch. Unit must remain
plugged in for indicator to function.
External Probe Indicator: Lights when external temperature probe
is plugged in.
Stir Key: Sets stirring action on or off.
Stir Up and Down Arrow Keys: Set stir speed from approximately
60 to 1,200 RPM. Hold the up arrow key to increase the set speed.
Hold the down arrow key to decrease the set speed.
Measured Speed Display: Shows actual stir speed.
Set Speed Display: Shows setting of desired stir speed.
Heat Key: Sets heater on or off.
Heat Up and Down Arrow Keys: Sets heat level supplied through
the top plate. Hold the up arrow key to increase the set
temperature. Hold the down arrow key to decrease the set
temperature.
Heat Indicator: Lights when the heating function in enabled. (Not
on stirrer only models.)
Measured Temp Display: Shows actual temperature of top plate
(or sample when using optional temperature probe).
Set Temp Display: Shows setting of desired temperature.
Plate and Probe Indicators: Show whether temperature being
displayed is being measured at the top plate or through the optional
temperature probe. When probe is plugged in, probe temperature is
displayed.
Operation:
Follow this general procedure when operating the stirrer, hotplate,
or stirring hotplate.
1. Before using the unit, be sure to read, understand, and follow
all safety information contained in these instructions.
2. Using the supplied power cord, plug unit into suitable power
outlet. The power indicator lights to show that the unit is
operational. The unit starts operating at the previous values for
stir speed and temperature. To stop the unit from functioning
and to return the stir speed and temperature to zero, press the
reset key.
3. To set the stir speed, press the stir key so the stir indicator
lights. To increase the stir speed, press and hold the stir up
arrow key. To decrease the stir speed, press and hold the stir
down arrow key. As you hold either of the arrow keys, the
value will start changing gradually, then change more quickly
as you continue holding the arrow key. The display shows the
measured speed and set speed. To turn off the stir function,
press the stir key so the stir indicator goes off.
Note: If the stirring bar decouples when boiling liquids, decrease
stirring speed to facilitate recoupling.
4. To set the temperature, press the heat key so the heat indicator
lights. Note that the unit is indicating °C (Centigrade) or °F
(Fahrenheit). To change the indication to Centigrade or
Fahrenheit, press the C/F key. To increase the temperature,
press and hold the heat up arrow key. To decrease the
temperature, press and hold the heat down arrow key. The
display shows the measured temperature and set temperature.
To turn off the heat function, press the heat key so the heat
indicator goes off.
Note: •When using the internal sensor (not external,
optional probe), it will be necessary to set the
temperature higher for the sample to achieve the
desired temperature. How much more will depend on
size, shape, and mass to be heated. The internal
sensor measures middle top surface temperature and
does not include an offset for a sample of unknown
size, shape, and mass. Two examples for
explanation purposes: Single 1”x 3” slide set in the
center of the top to evaporate liquid will be very
close to the correct temperature on the display. A
liter of water in a beaker will be off considerably
because of the large mass and surface area to
dissipate heat.
•To get the fastest heat up times set control to
maximum set point. Lower set points will ramp
slower to desired temperature. This is true with
either sensor (internal sensor or external probe).
WARNING:
During normal operation of the hotplate or stirring hotplate, the top
plate can become hot enough to cause severe burns. Avoid contact.
The top surface of the hotplate can remain hot without visual
indication for some time after heat is turned off or the power cord
is unplugged.
5. To stop the unit from functioning and to return the stir speed
and temperature to minimum, press the reset key.
Included with stirring units is a stir bar coated with Teflon
Fluorocarbon Resin. (Teflon Fluorocarbon Resin is a trademark of
E.I. DuPont de Nemours and Company.)
The hotplate/stirrer unit is equipped with a built-in support rod
holder located on the back of the unit. It will accommodate rods up
to 0.5” (13mm) diameter. Accessories are available from Fisher
(in the catalog under the Flexaframe and Castaloy sections) for this
unit.

Instruction Part # 104612 Rev. B Technical Service: 1-800-926-0505
Fisher Scientific Co. LLC Customer Service: 1-800-766-7000
3
CAUTION:
•When turning the controls off, be sure the indicator
lights are out.
•Hot surface, avoid contact. The top surface of the
hotplate can remain hot for some time after the power is
turned off. Refer to the hot top indicator to determine
when the top is safe to touch. The hot top indicator will
stay lit until the top surface temperature drops below
40°C. Unit must remain plugged in for the hot top
indicator to function.
•Gross weight of items placed on top plates should not
exceed 40 lbs.
Using the Temperature Probe:
The unit can be used with an optional temperature probe for direct,
precise control of the sample temperature. Install a support rod on
the rear of the housing to suspend the temperature probe into the
sample.
CAUTION:
•The coating on temperature probe may be damaged at
temperatures above 200°C.
•When attaching accessories to the hotplate/stirrer unit,
be careful to avoid the unit becoming unstable and
tipping over. Don’t attempt to support heavy objects
with the support rod.
1. Plug the temperature probe into the connector on the back of
the unit. Note that the plug is polarized with one blade larger
than the other, so it needs to be inserted correctly.
2. With the temperature probe plugged in, the external probe
indicator lights on the front panel. The display also shows
probe next to the measured temperature. These indicate that
the temperature is being controlled directly by the probe
rather than the top plate.
3. Set the temperature as normal by pressing the heat key so the
heat indicator lights, then use the up and down arrow keys to
set the desired temperature.
4. When finished using the temperature probe, unplug it, clean
it, and store in a safe place.
Specifications for Temperature and Stirring Speeds:
30°C (86°F) - 550°C (1022°F) (approx.)
60 -1200 RPM (approx.)
WARNING:
To avoid electrical shock, always disconnect from power supply
before cleaning and servicing. Refer servicing to qualified
personnel.
Cleaning:
1. Always unplug unit and allow to cool before cleaning.
2. Clean unit in an upright position to prevent cleaning agents
from entering unit..
3. Use a mild, non-abrasive cleaner (such as a damp cloth and
soap) to clean all exterior surfaces.
4. Make sure unit is dry before plugging in.
Troubleshooting:
If you are having problems using the stirrer, hotplate, or stirring
hotplate, follow these general procedures to track down the cause
Problem Possible Solution
No Power Unit not plugged into outlet. – Plug in.
Incorrect power – Connect to correct voltage
Blown Fuse – Replace Fuse
No Heat Press heat key so that heat indicator lights.
No Stir Press stir key so that stir indicator lights.
If problems continue contact:
Technical Service @ 1 800-926-0505
Rear Panel Nomenclature:
Probe Connector:
Accepts plug from optional temperature probe.
Power Entry Module:
Accepts power cord for providing line power to unit. Also houses
power line fuse.
Note: UK Models require fused cord. A larger fuse is contained in
the plug body.
CAUTION:
•For continued circuit protection, and to avoid a fire
hazard, be sure to replace fuses with the same type and
rating. If fuse blows repeatedly, contact Technical
Service.
•Use only the optional temperature probe designed
specifically for the Hotplate/Stirrer.
Replacing the Fuses:
If the unit is plugged in and turned on but shows no indication of
power, it could mean that the fuse needs to be changed. There are
two fuses located in the IEC power line module on the rear of the
unit. To replace the fuses, proceed as follows:
1. Turn all control knobs to the OFF position and pull the
power cord out of the IEC module.
2. Fit a thin blade screwdriver under the bottom portion of the
fuse holder.
3. Using a screw driver, slide the fuse holder out of the IEC
module.
4. Replace the bad fuses.
5. Slide the holder firmly back into the IEC module.
6. Reconnect the cord.
CAUTION:
Double pole neutral fusing (230V units only).

Instruction Part # 104612 Rev. B Technical Service: 1-800-926-0505
Fisher Scientific Co. LLC Customer Service: 1-800-766-7000
4
Accessories:
Support Rod (12”L) 14-666-10G
Support Rod (18”L) 14-666-10B
Support Rod (24”L) 14-666-10C
Temperature Probe 11-800-01
Replacement Part Listings:
Use only genuine Fisher Scientific parts and accessories designed
specifically for your stirrer, hotplate, or stirring hotplate.
Note: Fisher Scientific reserves the right to change product design
or specifications without notice or obligation.
Heater, 120V 105160
Heater, 230V 105161
Heater, 100V 105162
Display Board, Stir & Heat 104550
Display Board, Heat 104551
Display Board, Stir 104552
Control Board, Stir & Heat, 120V and 100V 104553
Control Board, Heat, 120V and 100V 104554
Control Board, Stir, 120V and 100V 104555
Control Board, Stir & Heat, 230V 104556
Control Board, Heat, 230V 104557
Control Board, Stir, 230V 104558
Line Cord and NEMA plug, 5-15P, 120V (and 100V) 40521
Line Cord and Continental European plug, 230V 83115
Line Cord and British plug, 230V 83117
Motor, 120V 105163
Motor, 230V 105164
Motor, 100V 105165
Stirring Bar (2 inches) 28476
Top Platen 103933
Thumb Screw 101980
Fuses (See size label on unit
120 V 7”x7” (1 per unit) 10 Amp 104528
230 V units (2 per unit) 6.3 Amp 88129