Quincy lab Bench 21-250ER User manual

POWER
LIGHT
POWER
LIGHT
POWER
RECIRC.
FAN
HEATER
SWITCH
POWER
LIGHT
Heat cycle
LIGHT
+/- 0.2oC
NA
+/- 0.3oC
+/- 0.5oC
+/- 0.5oC
+/- 0.5oC
+/- 0.5oC
+/- 0.5oC
POWER
LIGHT
POWER
LIGHT
POWER
LIGHT
POWER
OFF
HEATER
SWITCH
Heat cycle
LIGHT
Standard Contents
(1) Bench ER Series Oven
(2) Adjustable nickel-plated shelf
(4) Shelf brackets
Approvals:
UL / cUL, United States/Canadian
for laboratory equipment.
Compliance: UL Standard 61010-1
IEC 61010-1.
NOT FOR USE WITH FLAMMABLE
LIQUIDS OR GASES
*Standard models voltage only, optional 230 voltage available. Check label on back of unit.
INTERIOR DIMENSIONS
INCHES W x H x D
(CM) W x H x D
EXTERIOR DIMENSIONS
INCHES W x H x D
(CM) W x H x D
25.5x19.7x24 25.5x19.7x24 25.5x19.7x22.525.5x29.7x24
33x24x35.5 33x24x35.5 33x34x35.5 33x24x35.5
WEIGHT
SHIPPING
STAND ALONE
185
165
185
165
225
200
195
170
STANDARD ELECTRICAL
PLUG/NEMA
120/8.75*
1050
5-15P*
120/16*
1920
5-20P*
120/16*
1920
5-20P*
230/12.5
2850
6-20P
64x49.5x60 64x49.5x60 64x49.5x5764x75.5x60
83x60x90 83x60x90 83x86x90 83x60x90
TEMPERATURE RANGE
Ambient + 25F to
300 F/150 C 450 F/232 C 450 F/232 C 550 F/287 C
CONTROL STABILITY
@ 100C
@ 200C
Issue Rev B01.21
Copyright Quincy Lab Inc. 2022
MODEL
21-250ER
SPECIFICATIONS
VOLTS/AMPS
WATTS
Common Unit Construc�on
MODEL
21-350ER
MODEL
31-350ER
MODEL
51-550ER
Exterior:
Insula�on:
Thermo-control:
Powder Coated Steel
Fiberglass
Digital Microprocessor
Interior:
Motor:
Heater:
Aluminized Steel (SS op�onal)
Sealed Ball Bearing
Resis�ve - Tubular Incoloy
Bench Series Ovens Operang Manual
ER Models 21 /31 /51
+/- 0.5oC
+/- 0.5oC
25.5x29.7x24
33x34x35.5
225
200
120/16*
1920
5-15P*
64x75.5x60
83x86x90
300°F/150°C
MODEL
31-250ER
uincy
ab
Quincy Lab Inc. 109 Shore Dr. Burr Ridge, Illinois 60527 1800-482-4328 PAGE 1
Quincy Lab Inc.
DIGITALMICROPROCESSOR


MENU / LEVELS
INCREASE
DECREASE
FUNCTIONS
PROGRAMMABLE CONTROL
l
Q

Locate and place the oven on a suitable, clean, and solid surface.
Maintain a minimum of 6 inches of air space between the rear electrical
cover and any building or vertical surface. (FIG. 1)
Do not cover or restrict airflow at the rear air intake ports, this will cause
the motor to overheat, shortening the motor's life and increase risk of fire.
Heated exhaust air is expelled through the two small ports located just
above the rear electrical cover. (FIG. 2) Keep materials or building surfaces
that may be susceptible to this heated exhaust air clear from the rear area.
Maintain a minimum of 5 feet of unobstructed space above the oven to
allow exhaust air to convect up and away from the air intake ports.
Keep 3" of air space at the oven sides (3" from the control panel cover).
Safety Precautions
Read Operating Instructions thoroughly prior to operation and observe the following safety precautions:
Read Operating Instructions Thoroughly Prior to Operation
WARNING
Warns of a possible electrical shock
IMPORTANT
Refers to an important note in the usage of the unit.
WARNING
Warns of a possible risk of fire
CAUTION
Cautions of HOT exterior surface during operation.
WARNING
Warns of possible injury or muscle strains, use assistance when moving or liftiing.
WALL
6"
10"
6" minimum from wall to
rear blower housing.
CLEARANCE
REQUIREMENTS
20AMP
5-20P
15AMP
5-15P
120Volt Units
20AMP
6-20P
15AMP
6-15P
230Volt Units
REAR VIEW AIR FLOW
EXHAUST AIR
INTAKE AIR
FIG. 1
Below are NEMA plug configurations that are supplied with the various Bench Series ovens.
These configurations will also help to identify the oven’s electrical rating or power requirements.
Electrical
Plug the unit into a grounded outlet for your unit's rated voltage. Isolate each model to a separate, appropriately
rated circuit or breaker.
See the electrical label on the right rear side of the electrical cover to verify your unit’s power requirements.
FIG. 2
Use only a grounded outlet that is rated for your model's electrical requirement.
Do not modify the oven or factory control settings to operate the oven above the stated maximum operating
temperature.
Exterior surfaces on the Bench Oven models may become hot to the touch when operating at higher set temperatures.
Do not leave the oven unattended during operation.
Conduct periodic maintenance as required.
WARNING: Do not place volatile or combustible materials into Bench Ovens.
CAUTION: This unit is not intended for use with any flammable liquids or vapors, or with chemicals that produce toxic gases.
Set-Up & Installation
For units with optional Exhaust Chamber Adapter, see page 8.
PAGE 2

As the controller begins to heat to the set-point (green LEDs), you can quickly
change the temperature by pressing the UP or DOWN arrow key on the controller.
Turn the power / fan switch to the UP position (ON).
Turn heater switch to the UP position (HEAT).
Adjust Digital Controller Set-point Temperature.
Chamber Temperature
Temperature Setpoint
All control parameters and other control variables have already been factory set for your model's temperature range and
capacity to provide heating and performance characteristics for a broad range of applications. Your Bench Series ER
oven is ready for operation.
DIGITAL MICROPROCESSOR
Temperature Controller
General Operation
NORMAL START-UP SEQUENCE
TO INCREASE TEMPERATURE
SET-POINT
TO DECREASE TEMPERATURE
SET-POINT
HEATER
SWITCH
HEAT
FAN/COOL
When the heater switch is in the HEAT (up) position (FIG. 4), the unit’s heat
elements will activate and begin heating the oven.
When the heater switch is in the OFF (down) or fan/cool position, it allows for
convenient ambient air drying of articles or to more slowly & evenly cool heated
articles without having to lower or change the temperature setting.
The heater switch in the off or cool position also allows the oven to cool before
turning the fan off when using the oven at higher temperature settings. This helps
to both cool the motor (prolonging its life) and remove any moisture-laden air
before it condenses in the chamber, which will help prevent premature corrosion
over time.
Typically, once the oven reaches the
set-point temperature, it will need to
cycle at the set temperature for a
minimum of 20 minutes before it will
achieve equilibrium and becomes
stable (see stability specs. on page 1).
HEATER SWITCH
PFPF
Press and/or hold the
UP arrow key.
Press and/or hold the
DOWN arrow key.
1
2
3
ADJUSTING DIGITAL CONTROLLER UPON START-UP
POWER SWITCH
SET-POINT TEMPERATURE CHANGE
Upon start-up, all Quincy Lab Bench Ovens will display the current chamber
temperature (white LEDs) and begin the heating process to the factory default
temperature set-point (green LEDs). The initial temperature set-point varies
depending on your oven’s model. (FIG. 5)
The controller will also display the current temperature unit on the upper
right-hand corner of the controller and the RUN and OUT lights will be lit.
The default temperature unit has been set to read degrees Fahrenheit (°F), to
change the operating temperature unit see page 6.
When the power switch is turned to the ON position (FIG. 3), the blower will begin
to circulate chamber air and the temperature controller will power ON. At this
point, the oven will not start to heat until the heater switch is turned to ON.
POWER
OFF
RUN and OUT lights ON
indicates normal heating process.
The OUT light will flash intermittently
after achieving set-point.
100
300
RUN OUT
°F
PAGE 3
If the controller does NOT show the RUN light upon startup, press the
button (5 times) to see RUN and press once to enable parameter to YES.
To return, press once or give the controller 10 sec. to return on its own.
see THE RUN FUNCTION on page 6 for more information.
P
P
FIG. 3
FIG. 4
FIG. 5

Each shelf will support a distributed load of 100 lbs. maximum.
Do not exceed a combined total of 300 lbs. within the oven at one
time. Avoid placing articles on the oven floor. Instead, use a shelf
at the lowest adjustable position.
Install adjustable shelf by first placing the shelf bracket rivets into the
corresponding keyhole supports located on each inner side of the oven.
Orient the bracket in the "down" or " L" position. This position guides the
shelf in and out and protects the sidewall from being scratched. The
bracket may also be placed in the "up" or " " position if slightly more
interior clearance is needed. Place the shelf on the brackets as shown.
(FIG. 6)
Care should be taken when removing articles from the oven.
Don't pull the shelf out when removing heavy loads. The shelf
is not secured and loads can tip and fall forward.
TOP VIEW AIR FLOW
(SECTION)
BLOWER MOTOR
Chamber Loading and Oven Performance
When loading the oven, place items in the oven in such a way that air
circulation within the oven is not impaired. Note the airflow from the top
section view (FIG. 7). Heated air flows from back to front along the
side walls, moves horizontally toward the chamber center and then
back toward the recirculating blower.
OPTIMAL CHAMBER LOADING
Leave a space between articles on a shelf.
For best processing performance for a single item, adjust one
shelf so that the article is centered in the oven.
Avoid placing articles on the oven floor. Instead use a
shelf at the lowest adjustable position.
Do not place articles against the inner sidewalls or the slotted
vents in rear air plenum. (This will obstruct airflow and degrade
uniformity).
Do not overload the unit with large or high-density loads. (This
will show by non-uniform processing and/or long heat-through or
processing times).
Placing an article against the side walls or rear blower return vent
opening will greatly affect unit performance i.e. chamber uniformity,
run-up & recovery, maximum operating temperature, and energy use
efficiency. Here are some guidelines that are critical to optimum
oven performance and better/faster work- load processing.
Shelf Installation and Use
PAGE 4
SPACE LEFT INTENTIONALLY BLANK
FIG. 6
FIG. 7

(MENU 1)
OPERATION
CYCLE
(MENU 2)
PROGRAM
CYCLE
(MENU 3)
TIMER
CYCLE
(MENU 4)
TUNING
CYCLE
(MENU 5)
ALARMS
CYCLE
(MENU 6)
INPUT
CYCLE
(MENU 7)
CALIBRATION
CYCLE
GENERAL OPERATION MENU PASSWORD PROTECTED MENUS
UNIT
0FFS
PGR
PU
PR.TB
PR,P
PR N
P.TOL
P.SP0
P.T1
P.SP4
P.T 4
P.E1
P.E 4
LP
PASS
(*) PASS (*) PASS (*) PASS (*)
T.STR
T.DIR
T.TB
T 1
T.END
T 1.E
T 2
T.PU
ATUN
PB
1P
CT
DT
ACT
SF. ST
FU.A1
FU.A2
SP.A1
SP. A2
BL. A2
BL.A1
HY.A1
HY. A2
TYPE
FLTP
DP.PO
SP.LL
LBDT
SP.HL
1E.OU
BAUD
CALB
1N.LC
1N.HC
PEST
PROT
PAS.C
PGR.E
ATUN

Controller Functions
Your oven’s controller parameter values have been set at the factory to work with your model accordingly and is ready for
immediate use. Once the oven’s power switch and fan switch are turned to ON, your oven will begin to heat to the pre-set
temperature setpoint shown on the controller’s lower right hand corner.
NAVIGATING THE MENUS
To access each menu, press and hold the on your
controller. This will allow you to advance from one menu to
another.
Once you have reached the desired menu, simply let go of
the button and the controller will stop and display the
first parameter of the menu you’re in.
MENU OVERVIEW
As illustrated below, there are a total of 7 menus called
cycles. The first 3 MENUs (Operation Cycle, Program Cycle
and Timer Cycle) contain the basic parameters for general
operation of the oven. The remaining 4 menus are opera-
tional parameters that are only accessible with the factory
passcode of 1111.
INDICATORS AND ALARMS
300
300
RUN OUT
AT
A1 A2
ALARM
INDICATORS
CONTROLLER
KEYS
RX
TX
°C
°F
TEMPERATURE UNITS
PROCESS VALUE
RS485
COMMUNICATION
TEMPERATURE
SET-POINT
RUN
ON - Control is enable to run. (RUN = YES) or,
FLASHING - Indicates a program has stopped.
OUT
ON- Indicates normal activation of outputs.
FLASHING - Indicates normal operation
AT Indicator
ON- Indicates that an auto-tuning is in process.
(See Auto Tuning the oven for more information).
A1 and A2
ON - Indicates the occurrence of an alarm condition.
A3 and A4
ON- It signals the contidion of timer T1 and T2.
°C or °F
ON- Identifies the set temperature unit the oven is using.
Tx / RX Indicator
FLASHING - When the controller exchanges data
with the RS-485 communication network.
ALARM INDICATORS
COMMUNICATION INDICATORS
TEMPERATURE UNIT
CONTROLLER KEY DESCRIPTION
P
F
Menu/Advance - Use to advance to successive parameter or menu
Increase - Use key to increase the parameters value.
Decrease - Use key to decrease the parameters value.
Special Function - Use key to advance and return.
OPERATION
INDICATORS
OPERATION INDICATORS
TEMPERATURE SET-POINT
Number - Indicates temperature ‘set’ on the controller.
PROCESS VALUE
Number - Indicates chamber temperature on the controller.

Grayed-out parameters should NOT be changed.
Any changes made to these parameter may affect
the ovens’s performance.
Press and hold to acess and advance in menu’s


Press
to advance in
menu’s parameters
OUT 1
OUT 2
-
HYST
FLSH
-
P / SP
-
-
PRTY
ADDR
-
PU . E
-
SNH
SNL
MENU 1
Default menu on the controller.
A3 A4
RS-485
parameters on
oven’s with
communication
package
The instructions below are only
for setting a count down timer.
PAGE 5

OPERATION CYCLE (MENU 1)
AUTO-TUNING THE OVEN
ATUN
OFF
TEMPERATURE OFFSET / CALIBRATION
OFFS
0
SET-POINT CHANGE
300
300
TEMPERATURE UNITS
UNIT
F
To change the temperature set-point of your oven, use the
indicated arrow keys to increase or decrease temperature.
PF
PF
To change the oven’s operational units to read either degree
Celsius or degrees Fahrenheit you will need to:
PF
PF
FAST Tuning
PF
PF
RUNNING A PROGRAM
PPG
This parameter allows you to select a Ramp and Soak
program 1-5. (See Ramp and Soak Programming pg 7for
more information). To start a preset program, you need do
the following:
Your oven’s controller has been tuned from our factory to
achieve set-point temperatures at a faster rate. However, you
can auto-tune your oven’s controller to work best with your
application and set-points. The two auto-tuning available
options are:
Your oven has been calibrated at our factory using a
NIST-certified temperature instrument.
Over time a temperature adjustment (offset) may be neces-
sary to maintain the oven’s controller temperature reading
consistent with the oven’s interior temperature.
Press to
Increase
Press to
Decrease
Press once to
see UNIT
Press Up or Down
to select
Press 2 times to
see ATUN
Press down to
select option
PFPress 4 times to
return.
1
2
FULL Tuning
This option prioritizes speed over accuracy, allow-
ing you to reach set-point temperatures faster.
This tuning option gives priority to accuracy over
speed.
The auto-tuning process must be fully completed
before using the controller.
The TUNE light will remain lit throughout the entire
tuning phase.
PFPress 5 time to
return to main menu
PU0 FUNTION
To execute an auto-tuning you will need to:
Select the desired set-point temperature to tune the unit.
Enable auto-tuning at the parameter ATUN, and
select one of the tuning options, FAST or FULL
PF
PF
Press 3 times to
see OFFS
Press up or down
to input difference
PFPress 3 times to
return.
To execute an OFFSET you will need to:
Place a trusted, preferably certified digital temperature
probe at the center of the oven’s chamber.
Record the temperature reading at controller and at the
center of your oven’s chamber.
Access the OFFS parameter and input the tempera
ture difference from your controller to your digital probe.
PF
PF
Press 4 times to
see PRG
Press up or down
to select program
PFPress 2 times to
return
PF
PF
Press 5 times
Press up or
down to select
PFPress 1 time to
return.
1
PF
PF
PF
-
-
RUN OUT
PUN
YES
11
2
3
Set-point is indicated by the green
colored numbers.
The function allows the the user to enable and
disable the device heat operation.
This function acts as general key for the oven.
PU
When RUN = YES
The controller is enabled to operate and start the
heating process.
When RUN = NO
The controller is disabled and will NOT start the
oven’s heating process.
To enable or disable the RUN function do the following:
PAGE 6

Press and hold until you see T.STR
Basic Count Down Timer Function (Menu 3)
Control Calibration to Match Independent Device
IMPORTANT
The most accurate calibra�on possible for any digital unit is at
the center of the chamber (with the chamber empty). Therefore,
calibrate the control to the center of the chamber using an accu-
rate temperature measuring device.
Calibra�ng the actual chamber temperature to the temperature
displayed on the controller should only be done if the chamber’s
temperature, as measured by a known accurate device, is off by
more than the stated tolerance of your Bench Oven.
Your oven’s controller offset value has been input at the factory to match
your oven’s true chamber temperature when measured at the center of
the oven using an NIST (National Institute of Standard and Technology)
traceable temperature box (FIG.11). Over time this offset value may need
to be adjusted. If an offset needs to be performed in the field, place a
temperature probe at the center of the oven and adjust as needed.
CALIBRATION EXAMPLE:
In the example shown in (FIG.12), the digital controller process value
reads 150°F (white LEDs) and the independent temperature probe
placed at the center of the oven shows a reading of 155°F. Note the
difference of 5 degrees F between the temperatures. On the controller’s
OFFS parameter, for this example, we add the 5°F difference to the
offset value already present. This value change will adjust the process
value on the controller to match the chamber temperature of 155°F.
OFFS
0
PF
PF
Press 3 times to
see OFFS
Press up or down
to input difference
PFPress 3 times to
return.
Once a temperature adjustment has been made, allow the oven some
time to stabilize before making any subsequent adjustments.
The temperature difference between the controller and your independent
probe can be a positive or negative number.
OFFSET VALUE
150°F
155°F
Independent temperature
measuring device.
Independent temperature probe
ACCESS THE OFFSET PARAMETER BY:
Your oven’s controller is equipped
with a timer feature that allows
you to use a count down timer by
manual activation.
For additional timer options see
Timer on pg2 of the QR-code pdf.
T.STR
F
T.DIR
DN
T.TB
: SS
Time Start Mode (T.STR)
The (F) value allows the timer to be
manually activated by pressing once
steps are completed.
Time Count Direction (T.DIR)
F
MM
Time Base Setting ( T.TB)
Access this parameter and choose the
desired timer base setting.
T1
T.PU
ON
Time Interval Adjustment (T1)
Acess this parameter and input the
desired timer value using the UP or
DOWN arrow keys .
T.PU Behavior at end of timer
This parameter allows the unit to continue
or stop with the heating operation after the
timer option is finished. Choose one of the
following:
00:00
HH:MM - Time intervals are diplayed in
hours and minutes.
MM:SS - Time intervals are diplayed in
minutes and seconds.
T1.E
Set this parameter to NO. Continue to next timer parameter.
T. END
Set this parameter to OFF. Continue with the next timer parameter.
T2
Set this parameter to 0000. Continue with the next timer parameter.
N
N
ON - Temperature controller continues
to operate.
OFF - End controller heating operation
at the end of the timer.
If the OFF option is selected, at the end of the timer
the RUN function will need to be enable to YES for
oven to heat again. See RUN FUNCTION on page 6.
Step 1
Step 2
Starting the timer
Once timer is set, you can start, pause,
and stop/cancel the timer count by doing
the following:
F
Step 6
Setting the count down timer
Start - Press once.
Pause - Press once.
F
Stop / Cancel - Press for 3 seconds.
F
When the timer has activated, the indica-
tor (A3) will flash continuously.
When the timer is interrupted the indica-
tor (A3 or A4) will flash quickly.
P
(Press to advance to Step 2)
P
This tells the controller to count in a down
direction.
Step 3
and press to select F
T1.E
As you are pressing and holding you may go pass
T.STR , if this happens, simply continue to press
and hold until parameter T.STR is reached.
P
P(Press once more to complete set-up and return to
temperature display)
P
Press to select DN
Press to advance to Step 3 or to return to previous
PF
Using the or keys and select a desired
time base to apply to the timer.
Press to advance to Step 4 or to return to previous
PF
Step 4
Press to advance to Step 5 or to return to previous
PF
Using the or keys and select a desired
time.
Step 5
Set the following (3) parameters as follows and
press to advance :
Press to advance to Step 6 or to return to previous
PF
P
Using the or key select what happens
at the end of the timer.
There are other timer options available,
but only Fwill work as a count down timer.
Digital
controller
process
value
PAGE 7
FIG. 11
FIG. 12

PAGE 8
RAMP AND SOAK PROGRAMMING (MENU 2)
The Ramp and Soak Controller provides the opportunity to control applications needing set-point changes overtime. Exam-
ples of this are RAMP changes where a gradual rate of temperature change can be set. These can be separated by SOAK
periods during which the process is held at a constant value. Each individual time interval in the program or SEGMENT,
together with its associated moving setpoint value can be stored as a unique PROGRAM, as represented by the diagram
below (FIG. 9).
SP0
SP3
SP1 SP2
SP4
SEGMENT 1
RAMP
SEGMENT 3
RAMP
T1 T2 T3 T4
SEGMENT 2
SOAK
HOW TO CREATE A RAMP AND SOAK PROGRAM
1. Press and Hold to see PR.TB (Program time base, FIG. 8)
Select between HH:MM (hours:minutes) or MM:SS (Minutes:Seconds)
2. Press once to advance to PR.P (Function Resume Program)
Select one of the options which defines the behavior of the controller
when it resumes from power interruption.
3. Press once to advance to PR (Number of program to edit)
Select the program number (1 thru 5) to be edited/viewed.
Once you select a program number to edit, the parameters that
follow refer to the selected program.
P
P
P
4. Press once to advance to P.TOL(Maximum deviation from SP)
Input the maximum allowable deviation from PV with respect to SP
(set-point). If exceeded, the program is suspended (the internal timer
freezes) until PV (process value) is within the allowable deviation value.
P
5. Press once to advance to P.SP0 (Program SP 0 to 4)
Set the SP temperature of the program. P.SP0 is the
P
6. Press once to advance to P.T1 (Program Segment Time)
Set the duration time of the segment in the program being edited.
P
PR.TB
7. Press once to advance to P.E1 (Program Event)
Set this parameter to OFF. The alarm settings cannot be modified
P
Reapeat Steps 5-7 for each additional segment on the same program.
8. Press once to advance to LP(Link Programs)
Select a program number to be linked to another after the initial
program ends.
It is possible to create large, more complex program with up to 20
segments. Thus, at the end of the execution of a linked program, the
controller immediately starts executing the next selected program
number (FIG. 10).
P
Programming Set-points and time segments
SP0
SP3
SP1 SP2
SP4
PROGRAM 1
T1 T2 T3 T4
SP0
SP1
SP2
SP3
PROGRAM 2
SP4
T1 T2 T3 T4
PROG - Returns at the biginning of the program
P.SEG - Returns at the biginning of the segment
T.SEG - Returns at the exact point where it stopped
OFF - Returns with the controller disabled (RUN = No)
HH:MM
PRESS TO ADVANCE IN THE
PROGRAMMING MENU.
USE KEYS TO MAKE
A SELECTION.
PRESS TO RETURN TO PREVIOUS
PROGRAMMING PARAMETER
HOW TO START A PROGRAM
1. Press (4 times) to see PPG (Program)
P
2. Press or and select the program number to run.
3. Press to advance to RUN and using the select YES.
P
4. Press to return to main menu.
P
Example of linked programs
Example of ramp and soak program
Once the program is defined
and executed, the controller
automatically generates
set-points according to the
program.
FIG. 8
FIG. 9
FIG. 10

Unit not turning ON
when switch is in the
ON position
Email:
Voice:
Fax:
[email protected]
800-482-4328
773-622-2282
Quincy Lab, Inc.
109 Shore Dr.,
Burr Ridge, Illinois 60527
Quincy Lab, Inc. warrants to the original purchaser that this product will be free from defects in material and
workmanship under normal use throughout the warranty period. The standard warranty period for this is instru-
ment is eighteen months from date of shipment. The instrument warranty is supplemented with a three year
warranty on the heating element. Please refer to your invoice or shipping documents to determine the active
warranty period. This warranty covers parts & labor (labor at factory only) and shipping cost for replacement parts.
Limited Warranty
Maintenance / Control Calibration / Cleaning Procedures
Troubleshooting Tips / Parts & Equiptment / Technical Support
1. Check if the unit tripped a GFCI outlet or fuse. Try a different
power outlet connection before moving to number 2 on this list.
2. Reset Thermal Safety Disc in the back of the unit. (see PG 8
for more information)
3. Check wire connections and make sure there are no loose or
diconnected wires in the unit.
Unit’s temperature
varies by ± 15°F or
more
1. Check if the motor is running continuously. If the blower is
working and the unit still has a wild varying temperature in any
direction, or the oven continues to heat and trips the Thermal
Safety Disc, the digital controller may need replacement.
Contact Quincy Lab for further assistance.
Unit keeps tripping
GFCI outlet
1. Bad GFCI outlet
Common Replacement Components Common Additional Equiptment
Digital P.I.D Controller
Blower Motor
Door Ball Catch Additional Shelf
Additional Shelf Rail
Exhaust Chamber Adapter
Floor Oven Stand
Storage Cabinet
Contact Quincy Lab techincal support for further assistance or visit us on the web at www.quincylab.com
Technical Support
For a complete list of replacement components, parts, and additional
equipment, visit us on the web at www.quincylab.com or contact your
dealer for availability and pricing.
1. No power going to the unit
2. Triggered Thermal Safety Disc
3. Disconneted / loose wires.
1. After setting a Temperature, it
varies widely.
PART # 701-6412
PART # 301-2235 (115 VOLT)
PART # 301-2230 (230 VOLT)
PART # 301-2221 PART # 301-5000 PART # 301-2060
PART #301-2055
PART # 301-5001
PART # 301-5001S (STAINLESS STEEL)
PART # 301-2065
The Bench Series Ovens are designed to be virtually maintenance free. But operational safety requires periodic clean-
ing and chamber temperature accuracy verification.
CLEANING PROCEDURE
CONTROL CALIBRATION
Twice a year, check the actual oven chamber temperature against a known accurate temperature measurement
device. Maintain temperature accuracy to your models specified specifications. (see Control Calibration on page 7.)
Periodically check the rear air intake vents for dirt or dust build-up. Keep the intake & exit ports clear of obstruction
and clean of dust and dirt. This will keep the motor from overheating and reduce risk of fire. It may be necessary to remove
the rear electrical cover to clean or vacuum dirt and dust from in & around the motor. Unplug the oven before
removing the rear cover. To clean exterior and interior surfaces, use a damp cloth or an all-purpose cleaner. Avoid com-
mercially available oven cleaners.
1. Check if the unit tripped a GFCI outlet or fuse. Try a different
power outlet connection before moving to number 2 on this list.
S.S. Relay
PART # 701-6252
PAGE 9
2. Heating elements can retain some moisture if not used for a
given period of time, or if used in a very humid environment. Plug
in oven into a non GFCI outlet and allow the unit to heat for some
time to remove any moisture from heat elements.
3. Short in the unit / circuit overload 3. With the unit unplugged, check loose wires and wire terminal
for possible short. Also, check the connections at the ovens’
terminal block in the back for loose or disconnected wires.
PROBLEM POSSIBLE CAUSE WHAT TO DO BEFORE CALLING TECH. SUPPORT
2. Moisture on Heat Elements