Ohaus e-G71HS10C Manuale utente

Guardian 7000 Series

Hotplate-Stirrer, e-G71HSRDM

Hotplate-Stirrer, e-G71HS07C

Hotplate-Stirrer, e-G71HS10C

Instruction Manual

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Guardian 7000 Series EN-1

Table of Contents

1 INTRODUCTION ............................................................................................................................................... 2

1.1. Safety Information .................................................................................................................................. 2

1.2. Intended Use .......................................................................................................................................... 2

1.3. Package Contents .................................................................................................................................. 3

1.4. Installation .............................................................................................................................................. 3

1.5. Overview ................................................................................................................................................ 4

1.5.1 Dimensions ......................................................................................................................................... 4

1.5.2 Device Setup ...................................................................................................................................... 7

1.5.3 Display (All Units) ............................................................................................................................... 9

2 OPERATION ................................................................................................................................................... 10

2.1 Getting Ready ...................................................................................................................................... 10

2.2 Standby Mode ...................................................................................................................................... 10

2.3 Controlling the Stirrer ........................................................................................................................... 11

2.4 Controlling the Top Plate Heater .......................................................................................................... 12

2.5 Controlling the Timer ............................................................................................................................ 14

2.6 Using the External Probe ..................................................................................................................... 16

2.7 The Settings Menu ............................................................................................................................... 17

2.7.1 Accessing / Exiting ........................................................................................................................... 17

2.7.2 Features ........................................................................................................................................... 17

2.7.3 Structure & Defaults ......................................................................................................................... 19

2.8 Using the SmartHeat™ Feature ........................................................................................................... 20

2.9 Creating a User Program ..................................................................................................................... 21

2.10 Loading a User Program ...................................................................................................................... 22

2.11 Using the SmartRate™ Feature ........................................................................................................... 24

2.12 Using the SmartPresence™ Feature .................................................................................................... 26

2.13 Using the SmartLink™ Feature ............................................................................................................ 29

2.14 Using the Single Point Calibration Feature ........................................................................................... 32

2.15 Enabling / Disabling the Beeper ........................................................................................................... 37

2.16 Changing the Timer Start Setting ......................................................................................................... 38

2.17 Changing the Power Recovery Setting ................................................................................................. 39

2.18 Reset to Factory Default Settings ......................................................................................................... 41

3 MAINTENANCE .............................................................................................................................................. 43

3.1 Troubleshooting ................................................................................................................................... 43

3.2 Service Information .............................................................................................................................. 44

4 TECHNICAL DATA ......................................................................................................................................... 44

5 COMPLIANCE ................................................................................................................................................. 45

EN-2 Guardian 7000 Series

1. INTRODUCTION

This manual contains installation, operation and maintenance instructions for the Ohaus Guardian 7000 Series.

Please read the manual completely before using.

1.1. Safety Information

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.

A

TTENTION 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

Caution, hot

surface

Electrical shock

hazard

Safety Precautions

WARNING! DO NOT use the Hotplate-Stirrer 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. Also, the user should be aware that the protection provided by the

equipment may be impaired if used with accessories not provided by the manufacturer.

Always operate unit on a level surface for best performance and maximum safety.

DO NOT lift unit by the top plate.

CAUTION! To avoid electrical shock, completely cut off power to the unit by disconnecting the power

cord 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. DO NOT immerse the unit for

cleaning. Alkalis spills, hydrofluoric acid or phosphoric acid spills may damage the unit and lead to

thermal failure.

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! The rear panel of the 10x10-120V unit runs hot to the touch. Avoid contact during operation.

Allow unit to cool before touching the rear panel.

DO NOT operate the unit at high temperatures without a vessel/sample on the top plate.

DO NOT operate the unit if it shows sign of electrical or mechanical damage.

WARNING! Units are NOT explosion proof. Use caution when heating volatile materials.

Earth Ground – Protective Conductor Terminal. Protective earthing of the equipment is achieved via

connection of the provided power cord to a compatible grounded power outlet.

Alternating Current

1.2. Intended Use

The Ohaus Hotplate-Stirrers are intended for general laboratory use. Safety cannot be guaranteed if used outside

of the intended use.

Guardian 7000 Series EN-3

1.3. Package Contents

• Hotplate-Stirrer

• Power Cord (pre-attached for 10x10-120V units)

• Stir Bars (40 x 8mm and 28.6 x 8mm)

• 8” (20.3 cm) Stainless Steel RTD Temperature Probe

• In-Use Cover

1.4. Installation

Upon receiving the Ohaus Hotplate-Stirrer check to ensure that no damage has occurred during shipment. It is

important that any damage that occurred in transport is detected at the time of unpacking. If you do find such

damage, the carrier must be notified immediately.

After unpacking, place the Hotplate-Stirrer on a level bench or table, away from explosive vapors. Ensure that the

surface on which the unit is placed will withstand typical heat produced by the unit and place the unit a minimum of

six (6) inches from vertical surfaces. Do not position the equipment such that it is difficult to disconnect the power

cord during use. Always place the unit on a sturdy work surface.

The Hotplate-Stirrer is supplied with a 3 conductor, grounded power cord that should be plugged into a matching

standard grounded outlet. If the cord supplied does not meet your needs, please use an approved power cord that

has ratings equal or exceeding those of the originally provided cord and that complies with the local/national

regulations of the country in which the equipment is to be used. Replacement of the plug must be made by a

qualified electrician.

EN-4 Guardian 7000 Series

1.5. Overview

1.5.1 Dimensions

Round Top Hotplate-Stirrer

Note: + 2” diameter center of top plate

++ 800 mL of water in 1 L flask, 38 mm stir bar, 150 rpm and 50°C, 23°C ambient, 8” (20 cm) SS probe

Overall dimensions (L x W x H)

26.7 x 17.3 x 12.7 cm

(10.5 x 6.8 x 5”)

Top plate dimensions: Ø 13.5 cm (5.3”)

Top plate material: Aluminum

Electrical (50/60 Hz):

120 volts ±10%: 8.3 amps

230 volts ±10%: 4.6 amps

Fuses: 10A time-delay, 5x20mm, 250VAC

Temperature range: Ambient +5° to 380°C

Temperature stability of top plate

+

:

± 1% > 100°C, ± 1°C ≤ 100°C

Temperature stability with temperature probe

++

:

± 0.5% > 100°C, ± 1°C ≤ 100°C

Temperature accuracy of top plate:

± 5°C (@100°C after SPC)

Temperature accuracy with temperature probe

++

:

± 0.5°C (@100°C after SPC)

Stir capacity: 20 L

Speed range: 60 to 1600 rpm

Speed stability:

± 2%

Weight capacity: Up to 20 kg (44 lbs)

Ship weight: 2.8 kg

Guardian 7000 Series EN-5

7×7 Hotplate-Stirrer

Overall dimensions (L x W x H)

30.7 x 22.4 x 12.2 cm

(12.1 x 8.8 x 4.8”)

Top plate dimensions: 17.8 x 17.8 cm (7 x 7”)

Top plate material: Ceramic

Electrical (50/60 Hz):

120 volts ±10%: 10.0 amps

230 volts ±10%: 6.0 amps

Fuses: 10A time-delay, 5x20mm, 250VAC

Temperature range: Ambient +5° to 500°C

Temperature stability of top plate

+

:

± 1% > 100°C, ± 1°C ≤ 100°C

Temperature stability with temperature probe

++

:

± 0.5% > 100°C, ± 1°C ≤ 100°C

Temperature accuracy of top plate: ± 5°C (@100°C after SPC)

Temperature accurac

y

with temperature probe

++

:

± 0.5°C (@100°C after SPC)

Stir capacity: 15 L

Speed range: 60 to 1600 rpm

Speed stability: ± 2%

Weight capacity: Up to 15 kg (33 lbs)

Ship weight: 2.8 kg

Note: + 2” diameter center of top plate

++ 800 mL of water in 1 L flask, 38 mm stir bar, 150 rpm and 50°C, 23°C ambient, 8” (20 cm) SS probe

EN-6 Guardian 7000 Series

10×10 Hotplate-Stirrer

Note: + 2” diameter center of top plate

++ 800 mL of water in 1 L flask, 38 mm stir bar, 150 rpm and 50°C, 23°C ambient, 8” (20 cm) SS probe

Overall dimensions (L x W x H)

42.2 x 28.6 x 12.2 cm

(16.6 x 11.25 x 4.8”)

Top plate dimensions: 25.4 x 25.4 cm (10 x 10”)

Top plate material: Ceramic

Electrical (50/60 Hz):

120 volts ±10%: 11.2 amps

230 volts ±10%: 7.0 amps

Fuses:

120 volts: 15A quick-acting, 6.3x32mm, 125VAC

230 volts: 10A time-dela

y

, 5x20mm, 250VAC

Temperature range: Ambient +5° to 500°C

Temperature stability of top plate

+

:

± 1% > 100°C, ± 1°C ≤ 100°C

Temperature stability with temperature probe

++

:

± 0.5% > 100°C, ± 1°C ≤ 100°C

Temperature accuracy of top plate: ± 5°C (@100°C after SPC)

Temperature accuracy with temperature probe

++

:

± 0.5°C (@100°C after SPC)

Stir capacity: 18 L

Speed range: 60 to 1600 rpm

Speed stability: ± 2%

Weight capacity: Up to 18 kg (39 lbs)

Ship weight: 5.4 kg

Guardian 7000 Series EN-7

1.5.2 Device Setup

Round Top, 7×7, 10×10-230V

A. Display Screen

B. Standby Indicator

C. Left Knob: Controls temperature and settings

menu

D. Right Knob: Controls speed and timer

E. USB Port

F. External RTD Probe Port

G. Fuse

H. Power Entry Module (PEM)

I. Threaded Knob for Accessory Rod

J. Standby Switch

K. Feet: Not adjustable

EN-8 Guardian 7000 Series

10×10-120V

A. Display Screen

B. Standby Indicator

C. Left Knob: Controls temperature and settings menu

D. Right Knob: Controls speed and timer

E. USB Port

F. External RTD Probe Port

H. Power Cord

I. Threaded Knob for Accessory Rod

J. Standby Switch

K. Feet: Not adjustable

Guardian 7000 Series EN-9

1.5.3 Display (All Units)

L. Heater Indicator Bar: Illuminates when the heater

is ≥ 40°C.

M. Heater Temperature: Switches to external probe

temperature when the probe is plugged in and Z is

illuminated.

N. Heater Indicator: Illuminates when heater is

running

O. Heat Setting

P. Stir Speed

Q. Stirrer Indicator: Illuminates when stirrer is running

R. Speed Setting

S. Temperature Priority Icon

T. Timer: Hours : Minutes / Minutes : Seconds

U. Program Icon: Illuminates when a program is

running.

V. SmartPresence™ Icon

W. Bluetooth

®

Icon: Illuminates when SmartLink™ is

enabled.

X. Hot Top Caution Indicator: Illuminates when the

heater is ≥ 40°C.

Y. Single Point Calibration Icon

Z. External Probe Icon

AA. SmartHeat™ Icon

BB. SmartRate™ Heater Icons:

• Turtle –slower ramp rate (more precise)

• Rabbit –faster ramp rate

CC. SmartRate™ Stirrer Icons:

• Turtle –slower ramp rate (more precise)

• Rabbit –faster ramp rate

* The Bluetooth

®

word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of

such marks by OHAUS is under license.

EN-10 Guardian 7000 Series

2 OPERATION

2.1 Getting Ready

To get ready:

1. Plug the female end of the provided power cord into

PEM (H) on the rear side of the unit.

Note: For the 10x10-120V unit, this end of the power

cord is fixed to the rear side of the unit.

2. Plug the male end of the power cord into a matching

standard grounded outlet.

3. The unit will beep once and the screen will illuminate

with three displays:

a) The first will display the unit type (left) and the

software version (right).

b) The second will display the unit’s electrical

power (left) and frequency (right).

c) The third will be the unit’s main operating

screen.

Note: If the third screen is blank and the red

standby indicator (B) to the left of the screen is

illuminated, the unit is in standby mode.

2.2 Standby Mode

1. The rocker switch (J) on the right side of the unit

controls standby mode.

2. When the unit is switched off:

a) All heating, stirring, and timing functions will

turn off.

b) The screen will be blank and the red standby

indicator (B) to the left of the screen will be

illuminated.

If the heater temperature is above 40°C, the

hot top caution indicator will remain

illuminated as well as the current top plate

temperature and “HOT”.

3. When the unit is switched on:

a) All heating, stirring, and timing functions will

remain off.

b) The main operating screen will return.

Previous heating, stirring, and timing settings

will be displayed.

c) The unit is ready for normal use.

Guardian 7000 Series EN-11

2.3 Controlling the Stirrer

STIRRING OPERATING TIPS

The stirrer increases speed at a steady rate until the setpoint is reached. If the stirrer is not reaching its setpoint: 1)

the stir bar may be too large, 2) the liquid may be too viscous, 3) the setpoint speed may need to be reduced.

Additionally, the magnetic strength of stir bars reduce over time and may need to be replaced.

When heating and stirring a reaction vessel within an oil bath or similar set-up, the stirring function will stir up to

approximately one inch (2.5 cm) from the top plate. The stirring speed will vary according to liquid viscosity, spin

bar length, and distance from top plate. Adjust one or all of these to achieve the desired stirring speed. For

example: the closer the reaction vessel is to the top plate, the strong the magnetic connection between the unit and

the stir bar.

1. Rotate the right knob (D) to control the speed setting

(R).

a) Clockwise rotation will increase the speed

setting (R).

b) Counterclockwise rotation will decrease the

speed setting (R).

2. To turn on the stirrer, press and hold the right knob

(D) until the unit beeps and the stirrer indicator (Q)

illuminates.

a) The unit will beep once to confirm the stirrer

has been turned on.

b) The stirrer indicator (Q) will illuminate next to

the “RPM” symbol to indicate that the stirrer is

running.

c) The timer (T) will begin counting up from

00:00, or down from a set time.

d) The actual stir speed (P) will be displayed in

the top right region of the screen.

3. To change the speed setting while the stirrer is on:

a) Rotate the right knob (D) to the new speed

setting.

The speed setting (R) will blink to indicate that

the speed setting is not confirmed.

b) Briefly press the right knob (D) to confirm the

new speed setting.

The speed setting (R) will stop blinking once

the new setting is confirmed.

Note: If the speed setting (R) remains idle without

confirmation for 6 seconds, it will reset to the

current setting

4. To turn off the stirrer, press and hold the right knob

(D) until the unit beeps and the stirrer indicator (Q)

disappears.

a) The unit will beep once to confirm the stirrer

has been turned off.

b) The stirrer indicator (Q) next to the “RPM”

symbol will disappear to indicate that the

stirrer is off.

c) The timer (T) will reset back to 00:00 or the

previous timer setting.

If the heater is still running, then the timer will

continue to count.

EN-12 Guardian 7000 Series

2.4 Controlling the Top Plate Heater

1. Rotate the left knob (C) to control the heat setting

(O).

a) Clockwise rotation will increase the heat

setting (O).

b) Counterclockwise rotation will decrease the

heat setting (O).

2. To turn on the heater, press and hold the left knob

(C) until the unit beeps and the heater indicator (N)

illuminates.

a) The unit will beep once to confirm the heater

has been turned on.

b) The heater indicator (N) will illuminate next to

the “°C” symbol to indicate that the heater is

running.

c) The timer (T) will begin counting up from

00:00, or down from a set time.

d) The current heater temperature (M) will be

displayed in the top left region of the screen.

e) When the heater temperature (M) is above

40°C, the hot top caution indicator (X) and the

heater indicator bar (L) will be illuminated.

f) The heater indicator bar (L) will incrementally

illuminate as the heater progresses to the set

temperature.

3. To change the heat setting (O) while the heater is on.

a) Rotate the left knob (C) to the new heat

setting.

The heat setting (O) will blink to indicate that

the heat setting is not confirmed.

b) Briefly press the left knob (C) to confirm the

new heat setting.

The heat setting (O) will stop blinking once

the new setting is confirmed.

Note:

If the heat setting (O) remains idle without

confirmation for 6 seconds, it will reset to the

current setting.

The heater indicator bar (L) will remain fully

illuminated if the heater temperature (M) is greater

than or equal to the temperature setting (O).

Guardian 7000 Series EN-13

HEATING OPERATING TIPS

Overshoot:

The unit may overshoot the temperature up to 10°C before stabilizing at the setpoint. The three methods to

minimize overshoot are:

1. Use the SmartRate™ Feature.

2. Metal containers minimize overshoot. CAUTION! When heating metal containers on a ceramic top plate, it

is recommended to use the lowest temperature setting possible to limit thermal stress to the ceramic

top plate.

3. If a glass vessel is used, anticipate overshoot. Start with a temperature setpoint 5 to 10°C below the desired

temperature. When the temperature stabilizes at this lower setting, increase the heater to the final

temperature. Overshoot is then reduced to about 1°C.

The temperature display on the unit represents the estimated top plate temperature, not the sample temperature.

When external probe is in use, the temperature display on the unit represents the sample temperature. The

vessel’s contents being heated may be at a lower temperature depending on the size and thermal conductivity of

the vessel. It may be beneficial to monitor the temperature of the vessel’s contents and adjust the setpoint

temperature accordingly. If you need precise control, use the Ohaus External Temperature Probe.

Typical Time to Boil Water

The chart below is an example of an approximate time to boil for the specified amount of water in a specific vessel.

These values are only approximate and can vary from unit to unit. Values are based on 23°C water in an ambient

environment of 23°C.

Unit Size Heater Temp. Limit

V

olume of Water Typical Time to Boil

Round Top 380°C 1L in 2L Beaker

≈ 24 min

7×7

500°C 1L in 2L Beaker

≈ 21 min

10×10

500°C 1L in 2L Beaker

≈ 25 min

4. To turn off the heater, press and hold the left knob

(C) until the unit beeps and the heater indicator (N)

disappears.

a) The unit will beep once to confirm the heater

has been turned off.

b) The heater indicator (N) next to the “°C”

symbol will disappear to indicate that the

heater is off.

CAUTION: This does not mean that the top

plate is safe to touch.

c) The timer (T) will reset back to 00:00 or the

previous timer setting.

d) Once the heater temperature (M) cools below

40°C, the hot top caution indicator (X) and

heater indicator bar (L) will disappear.

EN-14 Guardian 7000 Series

2.5 Controlling the Timer

1. By default the timer (T) will be set to 00:00 and count

upwards when the heating or stirring functions are

turned on.

a) The timer (T) begins in MM:SS mode.

b) Once the timer reaches 59:59, it will

automatically switch to HH:MM mode at

01:00.

2. When the timer (T) is set to any time between 00:01

and 99:59, the timer (T) will count downwards from

the set time once the heating or stirring functions are

turned on.

a) The timer (T) can only be set in HH:MM

mode.

b) Once the timer (T) reaches 01:00 in HH:MM

mode, it will automatically switch to MM:SS

mode at 59:59.

c) Once the timer (T) reaches 00:00 in the

countdown mode:

All heating and stirring functions will shut off.

The unit will beep 3 times.

3. To change the timer setting (T), press and hold the

right knob (D) until the timer setting (T) displays

‘HH:MM’.

a) Continue to press the right knob (D) after the

unit beeps and the stirrer indicator (Q)

illuminates.

The stirrer will not turn on unless the right

knob (D) is released before ‘HH:MM’ appears.

b) The timer setting (T) cannot be changed while

the heater or the stirrer are running.

c) The timer setting (T) will return to the previous

timer setting and the minutes setting will begin

to blink to indicate that it can be modified.

d) The timer can only be set in HH:MM mode.

4. Rotate the right knob (D) to adjust the minutes

setting.

a) Clockwise rotation will increase the time.

b) Counterclockwise rotation will decrease the

time.

c) The minutes setting will continue to blink to

indicate the new timer setting is not

confirmed.

d) If the timer setting (T) remains idle without

confirmation for 6 seconds, the timer will

remain at the current setting and the unit will

exit the timer setting control.

Guardian 7000 Series EN-15

5. Briefly press the right knob (D) to confirm the minutes

setting and begin changing the hours setting.

The minutes setting will stop blinking and the hours

setting will begin to blink to indicate that it can be

modified.

6. Rotate the right knob (D) to adjust the hours setting.

a) Clockwise rotation will increase the time.

b) Counterclockwise rotation will decrease the

time.

c) The hours setting will continue to blink to

indicate the new timer setting is not

confirmed.

d) If the timer setting (T) remains idle without

confirmation for 6 seconds, the timer will

remain at the current setting and the unit will

exit the timer setting control.

7. Briefly press the right knob (D) to confirm the hours

setting and exit the timer settings.

a) The hours setting will stop blinking.

b) The unit will be ready for normal use.

8. To clear the timer (T) to 00:00, press and hold the

right knob (D) to enter the timer setting, then press

and hold the right knob (D) again until the timer (T)

resets to 00:00.

a) This can only be performed while changing

the timer in the minutes or hours setting.

b) The unit will exit the timer setting control and

be ready for normal use.

EN-16 Guardian 7000 Series

2.6 Using the External Probe

1. Connect the Ohaus External Temperature Probe

to the external RTD probe port (F) on the rear

panel of the unit.

Once the Ohaus External Temperature Probe is

connected, the external probe icon (Z) will appear

next to the heat setting (O).

2. The temperature display (M) will now show the

temperature of the external probe instead of the

heater.

a) The hot top caution indicator (X) will still

illuminate once the heater temperature

reaches 40°C.

b) The heater indicator bar (L) will

incrementally illuminate as the sample

progresses to the set temperature.

Note: When using the Ohaus External

Temperature Probe, the temperature setpoint

should be adjusted to the desired sample

temperature. If the temperature setpoint is higher

than the sample can achieve, an E7 will occur.

Reduce sample volume or temperature setpoint

value. For Example: Water has a theoretical

temperature limit of 100°C (boiling). A temperature

setpoint greater than 100°C will cause an E7 error.

3. If the Ohaus External Temperature Probe is

inserted into the external RTD probe port (F) while

the heater is running:

a) The heater will shut off.

b) The unit will display an E7 error

c) The unit will beep 10 times.

d) All stirring functions will remain operational.

4. If the Ohaus External Temperature Probe is

removed from the external RTD probe port (F)

while the heater is running:

a) The heater will shut off.

b) The unit will display an E4 error.

c) The unit will beep 10 times.

d) All stirring functions will remain operational.

Note: To clear an E4 or E7 error code, flip the

standby switch (J) off and back on. The unit will be

ready for normal use.

Guardian 7000 Series EN-17

2.7 The Settings Menu

2.7.1 Accessing / Exiting

1. To access the settings menu, press and hold the

left knob (C) until ‘MENU’ appears on the screen.

a) Continue to hold the left knob (C) after the

unit beeps and the heater indicator (N)

illuminates.

The heater will not turn on unless the left

knob (C) is released before ‘MENU’

appears.

b) The settings menu cannot be accessed

while the heater or the stirrer is running.

c) The “MENU” icon will appear briefly then

proceed to the top level of the settings

menu.

2. Rotate the left knob (C) to navigate the different

menu options and briefly press the left knob (C) to

select / enter / edit the displayed setting.

3. To exit the menu from the top level, rotate the left

knob (C) clockwise until the “EXIT” icon is

displayed and briefly press the left knob (C).

The unit will return to the main operating screen.

Note:

To exit the menu at any time, flip the standby

switch (J) off and back on. The unit will be ready

for normal use.

Turning off the unit will not reset / change the

settings.

2.7.2 Features

The top level of the settings menu has the following

features:

a) “TLIM” - SmartHeat™

SmartHeat™ allows the user to change the

maximum temperature limit of the heater.

b) “PROG” – Programs

The Programs menu allows the user to

load, store, delete, and run a series of

heater and stirrer functions from a

programmable text file on a USB storage

device.

c) “RAMP” – SmartRate™

SmartRate™ allows the user to change the

rate at which the heater and/or stirrer

increases temperature or speed

respectively.

EN-18 Guardian 7000 Series

d) “SAFE” – SmartPresence™ &

SmartLink™

SmartPresence™ is an optional safety

feature designed to automatically turn the

heater off if the unit is unattended for a

user-selected time limit.

SmartLink™ is an optional safety feature

designed to automatically turn the heater

off if the user travels out of range of the unit

for a user-selected time limit.

Note: SmartLink™ requires the optional

Ohaus Wireless Dongle accessory.

e) “CAL” – Single Point Calibration

Single Point Calibration (SPC) improves the

accuracy of the heater at user-selected

temperature points. Up to 5 points (Plate)

and 5 points (Probe) can be stored.

f) “SYS” – System Settings

System Settings allows the user to set

additional features, such as Enabling /

Disabling the Beeper, Changing the Timer

Start Setting, Changing the Power

Recovery Setting, and Resetting to Factory

Default Settings.

g) “EXIT”

The unit will save the current settings and

return to the main operating screen.

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