Fisher Scientific Isotemp 600 Series User manual

Instruction Manual
Fisher Scientific
IsotempâStandard Incubators
600 Series
Model 625D (Small)
Cat. No. 11-690-625D & -626D
Model 637D (Medium)
Cat. No. 11-690-637D & -638D
Model 650D (Large)
Cat. No. 11-690-650D & -651D

Isotemp Incubators
Table of
Contents
Introduction..........................................................................…………..1
Installation..............................................................…......………….......2
Selecting a Location......................................…........…….............2
Unpacking...........................................................…….....................2
Preparing the Incubator................................………........................3
Power Switch...................................................................................3
Convenience Outlet…………………………………………………….3
Control................................................................... ………......................4
Display.............................................................................................4
Keypad.............................................................................................5
Operation........................................………….........................................6
Safety Precautions................................................................……...7
Alarm Limits.............................................................................…...8
Display Offsets....................................................................….........8
Cleaning………………………………………………...……………….9
Service.......................................................................…………................9
Replacing the Door Gasket..................................................…......10
Accessing the Electronics..................................................... .......11
Replacing the Heater.............................................................….....12
Replacing the Controller........................................................…....13
Replacing the Solid State Relay................................................….13
Replacing the Safety Relay....................................................…....14
Replacing the Thermocouple....................................................….14
Replacing the Door Hinges......................................................…..15
Replacing the Handle......................................................…….......16
Adjusting the Door Cam........................................................…....16
Trouble-Shooting.............................................................…………......17
Replacement Parts................................................................……….....18
Performance Characteristics................................................………....19
Specifications....................................................………………….........20
Schematic Diagram...........................................................…………....21

1
Isotemp Incubators
Introduction
Fisher Isotemp 600 Series incubators are available in three sizes:
small (Model 625D), medium (Model 637D) and large (Model 650D).
All models provide PID microprocessor control at operating
temperatures ranging from 30 (86°F) to 75°C (167°F).
Note: Ambient temperature must be at least 5°C below
operating temperatures.
In these models, fresh air enters through an air intake on the bottom
of the incubator, then is heated in a plenum below the chamber,
finally flowing into the oven chamber itself in uniform flow patterns.
Exhaust air is vented through a port at the top of the incubator.
Temperature readouts and control parameters are shown on red
LED’s. Three additional LED’s indicate when the heater power is
being applied, an error condition is encountered, or the temperature is
being set.
The Model 625D accommodates a maximum of three shelves. The
Model 637D holds six shelves, and the model 650D holds 10 shelves.
Isotemp Incubators incorporate a variety of safety features. A safety
backup is built into the controller software. If the primary heater
control fails, the backup will maintain control at 3°C above the set
point. An alarm LED then indicates that the backup controller is
operating the incubator. A circuit breaker protects the incubator from
power surges.

Isotemp Incubators
2
Installation
Selecting a
Location
Unpacking
Choose a location for the incubator that will provide an area of
approximately 30inches by 30 inches. Allow at least 2” of open space
on both sides and back of unit (six inches if combustible materials).
The bench or table selected must be capable of supporting at least
120 lbs for the Model 625D, 130 lbs for the Model 637D, or 135 lbs for
the Model 650D. Appropriate electrical power must be available.
Locate the incubator within three feet of the power outlet so that no
extension cord is required.
Fisher Isotemp® Incubators are shipped in a single carton. After
unpacking, locate each item shown in the list below. Report any
missing items, by name and part number, to your Fisher branch or
representative. In the event of shipping damage, retain the carton
and packing material and file a claim with the final carrier.
Item
Incubator Assembly
Models 625D (small)
625D 120 V, 60Hz
626D 240 V , 50/60Hz
Models 637D (medium)
637D 120 V
638D 240 V
Models 650D (large)
650D 120 V, 60 HZ
651D 240 V, 50/60 HZ
Shelves
Models 625D & 637D (one provided)
Models 650D (two provided)
Shelf Supports
Models 625D & 637D (two provided)
Model 650D (four provided)
Instruction Manual

3
Isotemp Incubators
I
0
Preparing the
Incubator
Power Switch
Convenience
Outlet
To prepare the incubator for operation, perform the following procedures:
1. Install the shelf(s).
2. Make certain all packing material has been removed from incubator
chamber.
3. Connect the line cord to an appropriate electrical outlet.
Caution: See data plate on incubator for voltage, current
and line frequency specifications. Check that the power
requirements of the incubator will not overload the circuit to
which it will be connected.
4. The incubator is now ready for operation. No preliminary
adjustments or calibrations are required. Depending on the customer
application and customer laboratory procedures an initial calibration
may be done at this point.
The 600 Series incubators feature a front panel mounted power switch
which is a combination power switch and circuit breaker, eliminating the
need for separate internal fusing. The circuit breaker will interrupt power in
the event of an incubator heater malfunction.
Press the |(upper) half of the rocker-type power switch to the
in position to turn the incubator on. Press the 0 (lower) half to
the in position to turn off incubator power. To reset the
breaker, first place the switch to the off position, then return it
to the on position.
The 600 Series incubators feature a convenience electrical outlet located
inside the incubator, at the lower right of the back panel. This outlet is rated
at the same voltage as the incubator itself and is limited to a maximum
current of 5A for all models. If the current limit is exceeded, the circuit
breaker will trip. For safety, the integrity of the electrical ground should
always be maintained.

Isotemp Incubators
4
Controls
Display
The following sections briefly describe the locations and functions of various
display fields and keypad controls. More detailed descriptions are provided,
when required, in the operating sections of the manual.
The 600 Series controller features two bright, one-half inch, 7-segment LED
displays used in setting up the incubator program or reading incubator
temperature. Two smaller LEDs indicate, respectively, an alarm condition or
when power is being applied to the incubator heaters. Each display field is
discussed separately below.
Temperature Display In the normal operating mode, shows the current
incubator temperature. During programming, indicates the incubator set
temperature target.
Heat Indicator Lights when power is being supplied to the incubator heater.
Alarm Indicator Lights if the actual incubator temperature exceeds the
alarm temperature. The alarm temperature is factory-adjusted to be 5°C
above the set temperature.
Program Indicator Lights when the control temperature is being set.

5
Isotemp Incubators
Keypad
The 600 Series incorporates a four-key, tactile keypad. The function of each
key is discussed individually below.
Pressing the MENU Key will cause display to show CAL. Then pressing SET
Key will display calibration.
Pressing INCREASE Key while holding down the SET Key increases the
incubator set temperature, as indicated on the temperature display.
Pressing the DECREASE Key while holding down the SET Key decreases
the incubator set temperature, as indicated on the temperature display.
Pressing the SET Key causes the display to show the set temperature.
Used with INCREASE Key and DECREASE Key to change the set
temperature. With MENU Key to access entry of a temperature display
offset (calibration feature).

Isotemp Incubators
6
Operation
In Control mode operation, the incubator maintains a set temperature until
that set temperature is changed. The Actual and Set Displays will indicate
current chamber temperature and the temperature set point, respectively. To
set a temperature and initiate Control mode operation, perform the following
1. Place the power switch in the ON position. All 8’s will flash
as a test of the display.
2. Press and hold the SET Key.
3. Observe the set temperature in the Set Display window.
4. To decrease the set temperature, press the DECREASE
Key while holding the SET Key.
5. To increase the set temperature, press the INCREASE Key
while holding the SET Key.
6. When the desired set temperature is shown, release the
INCREASE OR DECREASE Key. Finally, release the SET
Key. The incubator automatically begins to control at the set
temperature.
Note: To rapidly increase or decrease the set temperature, press and
hold the appropriate key. To slowly increment or
decrement the set temperature one degree at a time, press and
immediately release the key.
Note: Upon initial heat up to temperature, the over range alarm
indicator light may illuminate briefly (several minutes) until the
temperature stabilizes at the set point. The incubator temperature
should be allowed to stabilize prior to loading samples.

7
Isotemp Incubators
Safety
Precautions
Before operating the incubator, always observe the following Safety
precautions:
This unit is not explosion proof.
Do not use in the presence of flammable or combustible materials; fire or
explosion may result. Unit contains components that may ignite such
materials.
Fumes and spillage from acidic solutions cause corrosion of the stainless
steel chamber and other components. Care should be taken to maintain a
neutral pH at all times.
The heater is in the bottom of the unit. Surface temperatures at the bottom
cover may be higher than set point temperature.
For Example: A plastic container setting on the heater cover may become hot
enough to melt/burn the container at settings below the melting point of
plastic. Do not place items on the heater cover.
•Wear insulated gloves.
•Use tongs.
•Never stand in front of an open incubator.
•Use safety goggles.