OHAUS Guardian 2000 User manual

GuardianTM 2000
Quick Start Guide
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GuardianTM Hotplate-Stirrers EN-1
1. SAFETY INFORMATION
Definition of Signal Warnings and Symbols
Safety notes are marked with signal words and warning symbols. These show
safety issues and warnings. Ignoring the safety notes may lead to personal injury,
damage to the instrument, malfunctions and false results.
WARNING
For a hazardous situation with medium risk, possibly resulting in
severe injuries or death if not avoided.
CAUTION
For a hazardous situation with low risk, resulting in damage to
the device or the property or in loss of data, or minor or medium
injuries if not avoided.
ATTENTION
For important information about the product. May lead to
equipment damage if not avoided.
NOTE
For useful information about the product.
Warning Symbols
General
hazard
Explosion
hazard
Caution, hot
surface
Protective
conductor
terminal
Alternating
current
Electrical shock
hazard
Safety Precautions
WARNING! The protection provided by the unit may be impaired if used
with accessories not provided or recommended by the manufacturer, or
used in a manner not specified by the manufacturer.
•Always operate unit on a level surface for best performance and maximum
safety.
•DO NOT lift unit by the top plate.
•To avoid electrical shock, completely cut off power to the unit by
disconnecting the power cord from the unit or unplugging from the wall outlet.
•Disconnect unit from the power supply prior to maintenance and servicing.
•Spills should be removed promptly, after the unit has cooled down.
•Alkalis spills, hydrofluoric acid or phosphoric acid spills may damage the unit
and lead to thermal failure.
•DO NOT immerse the unit for cleaning.
•DO NOT operate the unit at high temperatures without a vessel/sample on the
top plate.
•DO NOT operate the unit if it shows signs of electrical or mechanical damage.
•Protective earthing of the equipment is achieved via connection of the
provided power cord to a compatible grounded power outlet.
WARNING: unit is not explosion proof. Use caution when unit is on or when
heating volatile materials.

EN-2 GuardianTM Hotplate-Stirrers
WARNING! DO NOT use the unit in explosive atmospheres or with
materials that could cause a hazardous environment from processing. Keep
in mind the material flash point relative to the target temperature that has
been set.
CAUTION! The top plate can reach 500°C, DO NOT touch the heated
surface. Use caution at all times. Keep the unit away from explosive vapors
and clear of papers, drapery and other flammable materials. Keep the
power cord away from the heater plate.
CAUTION! Beware of the following risks when heating.
-Flammable materials
-Low boiling point combustible substances
-Glass breakage as a result of mechanical shaking power
-Incorrect container size
-Too much medium
-Unsafe condition of container
Earth Ground - Protective Conductor Terminal
Alternating Current
Intended Use
This instrument is intended for use in laboratories, pharmacies, schools, businesses
and light industry. It must only be used for processing materials as described in
these operating instructions. Any other type of use and operation beyond the limits
of technical specifications, without written consent from OHAUS, is considered as
not intended.This instrument complies with current industry standards and the
recognized safety regulations; however, it can constitute a hazard in use. If the
instrument is not used according to these operating instructions, the intended
protection provided by the instrument may be impaired.

GuardianTM Hotplate-Stirrers EN-3
2. BASIC FUNCTIONS
Rotate
/
I/O –Standby
Switch
Turn unit on
(Press switch)
Turn unit off
(Press switch)
Temp Knob
Functions
Change temp settings
(Rotate temp knob)
/
Turn heater on
(Rotate temp knob until unit
green light appears)

Change temperature
settings, while heating
(Rotate temp knob)
/
Turn heater off
(Rotate temp knob until unit
green light fades)

Speed Knob
Functions
Change speed settings
(Rotate speed knob)
/
Turn stirrer on
(Rotate speed knob until unit
green light appears)

Change speed settings,
while stirring
(Rotate speed knob)
/
Turn stirrer off
(Rotate speed knob until unit
green light fades)





EN-4 GuardianTM Hotplate-Stirrers
3. CONTROL PANEL
1. Left Knob: Controls temperature.
2. Standby Switch
3. Heater Indicator: Illuminates when heater is running.
4. Hot Top Caution Indicator: Illuminates when the top plate surface is hot. Do
not touch.
5. Speed Indicator: Illuminates when stirrer is running.
6. Right Knob: Controls speed.
Note: The top plates are of different dimension and material. Please refer to the
actual product for detail.
4. MAINTENANCE
4.1 Cleaning
WARNING: Electric Shock Hazard. Disconnect the equipment
from the power supply before cleaning.
Make sure that no liquid enters the interior of the instrument.
Attention: Do not use solvents, harsh chemicals, ammonia or
abrasive cleaning agents.
The housing may be cleaned with a cloth dampened with a mild detergent if
necessary.
4.2 Replacing Power Fuse
The fuse is located at the back of the instrument. Choose the correct fuse to replace
according to the fuse specification listed in the specification table.
WARNING: Electric Shock Hazard. Disconnect the equipment
from the power supply before replacing the fuse.
3
4
2
5
1
6

GuardianTM Hotplate-Stirrers EN-5
The use of a fuse of a different type or with a different value, or
bridging or shunting the fuse is not allowed and can possibly
cause a hazard to your safety and lead to instrument damage!
4.3 Troubleshooting
The following table lists common problems and possible causes and remedies. If
the problem persists, contact OHAUS or your authorized dealer.
Table 4-1 Troubleshooting
Error
Cause of Error
How to Fix
Unit fails to
power on
Missing or blown fuse
Add or replace fuse as necessary.
Unit fails to
heat
Heater over temperature
or
Heater damage
Unplug and replug the power cord
for reset, if the failure consistent,
please contact OHAUS.
Unit fails to
stir
Motor overload
or
Motor damage
Smaller vessel or reduce volume
in vessel and wait for auto reset, if
the failure consistent, please
contact OHAUS.
4.4 Service Information
If the troubleshooting section does not resolve your problem, contact an authorized
OHAUS Service Agent. For Service assistance in the United States, call toll-free 1-
800-526-0659 between 8:00 AM and 5:00 PM Eastern Standard Time. An OHAUS
Product Service Specialist will be available to assist you. Outside the USA, please
visit our website www.ohaus.com to locate the OHAUS office nearest you.
5. TECHNICAL DATA
Equipment Ratings:
Indoor use only
Altitude:
0 to 2000m
Operating temperature:
5°C to 40°C
Storage temperature:
-20°C to 65°C
Operating humidity:
20 to 80% relative humidity, non-condensing
Storage humidity:
20 to 80% relative humidity, non-condensing
Voltage fluctuations:
Mains supply voltage fluctuations up to ±10% of the
nominal voltage.
Overvoltage category
(Installation category):
II
Pollution degree:
2

EN-6 GuardianTM Hotplate-Stirrers
Table 5-1 Specification
Model
- Hotplate Stirrer
- Hotplate
- Stirrer
e-G21HSRDS
e-G21HPRDS
e-G21STRDS
e-G21HS04C
e-G21HP04C
e-G21ST04C
e-G21HS07C
e-G21HP07C
e-G21ST07C
Overall Dimensions
(L x W x H)
264 x 163 x 101 mm
(10.4 x 6.4 x 4.0'')
264 x 163 x 110 mm
(10.4 x 6.4 x 4.3'')
318 x 223 x 112 mm
(12.5 x 8.8 x 4.4'')
Top Plate Dimensions
Ø 13.5 cm (5.3'')
10.2 x 10.2 cm (4 x 4'')
17.8 x 17.8 cm (7 x 7'')
Top Plate Material
Ceramic Coated
Stainless Steel
Ceramic
Electrical (50 / 60 Hz)
- Hotplate Stirrer
- Hotplate
100-120V~ 5A / 220-240V~ 4A
100-120V~ 10A /
220-240V~ 7A
Electrical (50 / 60 Hz)
- Stirrer
100-120V~ 2A / 220-240V~ 1A
Fuses
- Hotplate Stirrer
- Hotplate
10 A, 5x20 mm, 250 VAC /
6.3 A, 5x20 mm, 250 VAC
15 A, 5x20 mm, 250 VAC /
10 A, 5x20 mm, 250 VAC
Fuses
- Stirrer
6.3 A, 5x20 mm, 250 VAC
Temperature Range
50° C to 380° C
70° C to 500° C
Temperature Stability of
Top Plate+
± 3% > 100C and ±°3C ≤ 100C
Stir Capacity
15 L
Speed Range++
200 to 1600 rpm
Weight Capacity
Up to 15 kg (33 lbs)
Shipping Dimensions
(W × D × H)
330 x 250 x 140 mm (13.0 x 9.8 x 5.5'')
390 x 290 x 160 mm
(15.4 x 11.4 x 6.3'')
Shipping Weight
- Hotplate Stirrer
- Hotplate
- Stirrer
3.1 kg
2.4 kg
2.9 kg
3.1 kg
2.4 kg
3.0 kg
4.6 kg
3.9 kg
4.5 kg
Note:
⚫+The parameter in the specification table are applicable to 2” (5cm) diameter center of the top
plate.
⚫++ Minimal speed varies depending on the stir bar, vessel and fluid conditions.

GuardianTM Hotplate-Stirrers EN-7
6. COMPLIANCE
Compliance to the following standards is indicated by the corresponding mark on
the product.
Mark
Standard
This product complies with the applicable harmonized standards of
EU Directives 2011/65/EU (RoHS), 2014/30/EU (EMC) and
2014/35/EU (LVD). The EU Declaration of Conformity is available
online at www.ohaus.com/ce.
This product complies with the applicable statutory standards of the
Restriction of the Use of Certain Hazardous Substances in
Electrical and Electronic Equipment Regulations 2012, UK
Electromagnetic Compatibility Regulations 2016 and Electrical
Equipment (Safety) Regulations 2016. The UK Declaration of
Conformity is available online at www.ohaus.com/uk-declarations.
This product complies with the EU Directive 2012/19/EU (WEEE).
Please dispose of this product in accordance with local regulations
at the collecting point specified for electrical and electronic
equipment. For disposal instructions in Europe, refer to
www.ohaus.com/weee.
EN 61326-1
CAN/CSA-C22.2 No. 61010-1, CAN/CSA-C22.2 No. 61010-2-010,
CAN/CSA-C22.2 No. 61010-2-051
UL 61010-1, UL 61010-2-010, UL 61010-2-051
ISED Canada Compliance Statement:
CAN ICES-003(A) / NMB-003(A)
ISO 9001 Registration
The management system governing the production of this product is ISO 9001
certified.
Scan the QR code to download the full instruction manual or visit
http://www.ohaus.com/support to view the full user manual.
GuardianTM 2000
Instruction Manual

EN-8 GuardianTM Hotplate-Stirrers
FCC Supplier Declaration of Conformity
Unintentional Radiator per 47CFR Part B
Trade Name: OHAUS CORPORATION
Model or Family identification: e-G21
Party issuing Supplier’s Declaration of Conformity:
Ohaus Instruments (Changzhou) Co., Ltd.
2F, 22 Block, 538 West Hehai Road, Xinbei District, Changzhou
Jiangsu 213022
China
Phone: [phone]
Responsible Party –U.S. Contact Information:
Ohaus Corporation
7 Campus Drive, Suite 310
Parsippany, NJ 07054
United States
Phone: [phone]
Web: www.ohaus.com
FCC Compliance Statement:
Note: This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the
interference at his own expense.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.