Fieldpiece JL3RH User manual

01 02 03 04 05
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
(Latest compatibility at www.fieldpiece.com)
Battery Type: 2 x AAA, NEDA 24A, IEC LR03
Battery Life: 150 hours typical alkaline. LED blinks red when
battery replacement is needed.
Auto Power Off: 2 hours (APO can be disabled)
Wireless Range: 350 feet (107 meters) line of sight.
Obstructions affect distance.
Radio Frequency: 2.4 GHz
Operating Environment: 32°F to 122°F (0°C to 50°C) at <75% RH
Storage Temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with batteries removed)
Temperature Coefficient: 0.1 x (specified accuracy) per 1.8°F
(32°F to 64°F, 82°F to 122°F), per 1°C (0°C to 18°C, 28°C to 50°C)
Weight: 0.33 lbs (150 g)
Flexible Probe: 0.36" (9mm) diameter; 9.25" (235mm) length
US Patent: www.fieldpiece.com/patents
Relative Humidity (%RH)
Sensor Type: Capacitance polymer film
Hysteresis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
Measurement Range: 0%RH to 100%RH
Accuracy: (At 73.4°F (23°C))
±2.5% (10%RH to 90%RH); ±(5%) <10%RH, >90%RH
Response Time: 60 seconds typical for 90% of total range
Temperature
Sensor Type: Precision thermistor
Measurement Range: -4°F to 140°F (-20°C to 60°C)
Accuracy: ±(1°F) 32°F to 113°F, ±(0.5°C) 0°C to 45°C;
±(2°F) -4°F to 32°F, 113°F to 140°F, ±(1°C) -20°C to 0°C, 45°C to 60°C
Quick Start
1 Install the Fieldpiece Job Link® system app on
yourmobiledevice and signupforanaccount
if you're a new user.
2 Removethesinglescrewoftheyellowbattery
cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 OpenMeasurementsinthe Job Link® app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 Viewlivemeasurementsonyourmobiledevice
up to 350 feet away.
What's Included
Job Link® System Flex Psychrometer Probe
1 Protective Slip Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
Description
The JL3RH Job Link® System Flex Psychrometer
Probe sends air measurements directly to the
Fieldpiece Job Link® app up to 350' away.
Measure %RH, dry bulb, wet bulb, dew point,
and enthalpy at a register/grille, in the duct, or
just walking around. Bend the flexible probe and
slide the magnet to conveniently configure the
JL3RH to your situation.
The rubberized protective housing is both
ergonomic and rugged for daily use. Flip the
switch and app immediately knows which
side of the system you're going to place your
psychrometer probe.
Use the long wireless range, strong
magnet, and flexible probe for quick and easy
psychrometrics testing.
Maintenance
CLEANING: Clean the exterior with a damp
cloth. Do not use detergents or solvents. Do not
touch the sensor.
BATTERIES: When the LED slow blinks Red,
the batteries must be replaced. Ensure the
power is OFF. Remove the single screw from the
yellow battery cover. Install 2 x AAA batteries.
Monitor battery life in the app's tool manager.
SENSOR CARE: Cover the sensor with the
slip cover when not in use. Extreme conditions
or exposure to solvent vapor may offset the
RH sensor. To re-calibrate, place the sensor in a
controlled environment of 75%RH and between
68°F - 86°F for a period of 24 hours. To create a
75%RH environment, add wet salt to a clean
open container (bottle cap). Be careful to not
let the solution touch the probe. Place this
container and the probe in a large sealed bag
at room temperature, undisturbed for 24 hours.
Job Link® System
Flex Psychrometer
Probe
OPERATOR'S
MANUAL
Model JL3RH
www.fieldpiecejoblink.com
WARNING
Prevent damage, do not drill holes blindly into a plenum that
houses the evaporator or heat exchanger.
Fieldpiece

01 02 03 04 05
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
(Latest compatibility at www.fieldpiece.com)
Battery Type: 2 x AAA, NEDA 24A, IEC LR03
Battery Life: 150 hours typical alkaline. LED blinks red when
battery replacement is needed.
Auto Power Off: 2 hours (APO can be disabled)
Wireless Range: 350 feet (107 meters) line of sight.
Obstructions affect distance.
Radio Frequency: 2.4 GHz
Operating Environment: 32°F to 122°F (0°C to 50°C) at <75% RH
Storage Temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with batteries removed)
Temperature Coefficient: 0.1 x (specified accuracy) per 1.8°F
(32°F to 64°F, 82°F to 122°F), per 1°C (0°C to 18°C, 28°C to 50°C)
Weight: 0.33 lbs (150 g)
Flexible Probe: 0.36" (9mm) diameter; 9.25" (235mm) length
US Patent: www.fieldpiece.com/patents
Relative Humidity (%RH)
Sensor Type: Capacitance polymer film
Hysteresis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
Measurement Range: 0%RH to 100%RH
Accuracy: (At 73.4°F (23°C))
±2.5% (10%RH to 90%RH); ±(5%) <10%RH, >90%RH
Response Time: 60 seconds typical for 90% of total range
Temperature
Sensor Type: Precision thermistor
Measurement Range: -4°F to 140°F (-20°C to 60°C)
Accuracy: ±(1°F) 32°F to 113°F, ±(0.5°C) 0°C to 45°C;
±(2°F) -4°F to 32°F, 113°F to 140°F, ±(1°C) -20°C to 0°C, 45°C to 60°C
Quick Start
1 Install the Fieldpiece Job Link® system app on
yourmobiledeviceand signupforanaccount
if you're a new user.
2 Removethesinglescrewoftheyellowbattery
cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 OpenMeasurementsinthe Job Link® app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 Viewlivemeasurementsonyourmobiledevice
up to 350 feet away.
What's Included
Job Link® System Flex Psychrometer Probe
1 Protective Slip Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
Description
The JL3RH Job Link® System Flex Psychrometer
Probe sends air measurements directly to the
Fieldpiece Job Link® app up to 350' away.
Measure %RH, dry bulb, wet bulb, dew point,
and enthalpy at a register/grille, in the duct, or
just walking around. Bend the flexible probe and
slide the magnet to conveniently configure the
JL3RH to your situation.
The rubberized protective housing is both
ergonomic and rugged for daily use. Flip the
switch and app immediately knows which
side of the system you're going to place your
psychrometer probe.
Use the long wireless range, strong
magnet, and flexible probe for quick and easy
psychrometrics testing.
Maintenance
CLEANING: Clean the exterior with a damp
cloth. Do not use detergents or solvents. Do not
touch the sensor.
BATTERIES: When the LED slow blinks Red,
the batteries must be replaced. Ensure the
power is OFF. Remove the single screw from the
yellow battery cover. Install 2 x AAA batteries.
Monitor battery life in the app's tool manager.
SENSOR CARE: Cover the sensor with the
slip cover when not in use. Extreme conditions
or exposure to solvent vapor may offset the
RH sensor. To re-calibrate, place the sensor in a
controlled environment of 75%RH and between
68°F - 86°F for a period of 24 hours. To create a
75%RH environment, add wet salt to a clean
open container (bottle cap). Be careful to not
let the solution touch the probe. Place this
container and the probe in a large sealed bag
at room temperature, undisturbed for 24 hours.
Job Link® System
Flex Psychrometer
Probe
OPERATOR'S
MANUAL
Model JL3RH
www.fieldpiecejoblink.com
WARNING
Prevent damage, do not drill holes blindly into a plenum that
houses the evaporator or heat exchanger.
Fieldpiece

01 02 03 04 05
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
(Latest compatibility at www.fieldpiece.com)
Battery Type: 2 x AAA, NEDA 24A, IEC LR03
Battery Life: 150 hours typical alkaline. LED blinks red when
battery replacement is needed.
Auto Power Off: 2 hours (APO can be disabled)
Wireless Range: 350 feet (107 meters) line of sight.
Obstructions affect distance.
Radio Frequency: 2.4 GHz
Operating Environment: 32°F to 122°F (0°C to 50°C) at <75% RH
Storage Temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with batteries removed)
Temperature Coefficient: 0.1 x (specified accuracy) per 1.8°F
(32°F to 64°F, 82°F to 122°F), per 1°C (0°C to 18°C, 28°C to 50°C)
Weight: 0.33 lbs (150 g)
Flexible Probe: 0.36" (9mm) diameter; 9.25" (235mm) length
US Patent: www.fieldpiece.com/patents
Relative Humidity (%RH)
Sensor Type: Capacitance polymer film
Hysteresis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
Measurement Range: 0%RH to 100%RH
Accuracy: (At 73.4°F (23°C))
±2.5% (10%RH to 90%RH); ±(5%) <10%RH, >90%RH
Response Time: 60 seconds typical for 90% of total range
Temperature
Sensor Type: Precision thermistor
Measurement Range: -4°F to 140°F (-20°C to 60°C)
Accuracy: ±(1°F) 32°F to 113°F, ±(0.5°C) 0°C to 45°C;
±(2°F) -4°F to 32°F, 113°F to 140°F, ±(1°C) -20°C to 0°C, 45°C to 60°C
Quick Start
1 Install the Fieldpiece Job Link® system app on
yourmobiledeviceand signupforanaccount
if you're a new user.
2 Removethesinglescrewoftheyellowbattery
cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 OpenMeasurementsinthe Job Link® app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 Viewlivemeasurementsonyourmobiledevice
up to 350 feet away.
What's Included
Job Link® System Flex Psychrometer Probe
1 Protective Slip Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
Description
The JL3RH Job Link® System Flex Psychrometer
Probe sends air measurements directly to the
Fieldpiece Job Link® app up to 350' away.
Measure %RH, dry bulb, wet bulb, dew point,
and enthalpy at a register/grille, in the duct, or
just walking around. Bend the flexible probe and
slide the magnet to conveniently configure the
JL3RH to your situation.
The rubberized protective housing is both
ergonomic and rugged for daily use. Flip the
switch and app immediately knows which
side of the system you're going to place your
psychrometer probe.
Use the long wireless range, strong
magnet, and flexible probe for quick and easy
psychrometrics testing.
Maintenance
CLEANING: Clean the exterior with a damp
cloth. Do not use detergents or solvents. Do not
touch the sensor.
BATTERIES: When the LED slow blinks Red,
the batteries must be replaced. Ensure the
power is OFF. Remove the single screw from the
yellow battery cover. Install 2 x AAA batteries.
Monitor battery life in the app's tool manager.
SENSOR CARE: Cover the sensor with the
slip cover when not in use. Extreme conditions
or exposure to solvent vapor may offset the
RH sensor. To re-calibrate, place the sensor in a
controlled environment of 75%RH and between
68°F - 86°F for a period of 24 hours. To create a
75%RH environment, add wet salt to a clean
open container (bottle cap). Be careful to not
let the solution touch the probe. Place this
container and the probe in a large sealed bag
at room temperature, undisturbed for 24 hours.
Job Link® System
Flex Psychrometer
Probe
OPERATOR'S
MANUAL
Model JL3RH
www.fieldpiecejoblink.com
WARNING
Prevent damage, do not drill holes blindly into a plenum that
houses the evaporator or heat exchanger.
Fieldpiece

01 02 03 04 05
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
(Latest compatibility at www.fieldpiece.com)
Battery Type: 2 x AAA, NEDA 24A, IEC LR03
Battery Life: 150 hours typical alkaline. LED blinks red when
battery replacement is needed.
Auto Power Off: 2 hours (APO can be disabled)
Wireless Range: 350 feet (107 meters) line of sight.
Obstructions affect distance.
Radio Frequency: 2.4 GHz
Operating Environment: 32°F to 122°F (0°C to 50°C) at <75% RH
Storage Temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with batteries removed)
Temperature Coefficient: 0.1 x (specified accuracy) per 1.8°F
(32°F to 64°F, 82°F to 122°F), per 1°C (0°C to 18°C, 28°C to 50°C)
Weight: 0.33 lbs (150 g)
Flexible Probe: 0.36" (9mm) diameter; 9.25" (235mm) length
US Patent: www.fieldpiece.com/patents
Relative Humidity (%RH)
Sensor Type: Capacitance polymer film
Hysteresis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
Measurement Range: 0%RH to 100%RH
Accuracy: (At 73.4°F (23°C))
±2.5% (10%RH to 90%RH); ±(5%) <10%RH, >90%RH
Response Time: 60 seconds typical for 90% of total range
Temperature
Sensor Type: Precision thermistor
Measurement Range: -4°F to 140°F (-20°C to 60°C)
Accuracy: ±(1°F) 32°F to 113°F, ±(0.5°C) 0°C to 45°C;
±(2°F) -4°F to 32°F, 113°F to 140°F, ±(1°C) -20°C to 0°C, 45°C to 60°C
Quick Start
1 Install the Fieldpiece Job Link® system app on
yourmobiledeviceand signupforanaccount
if you're a new user.
2 Removethesinglescrewoftheyellowbattery
cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 OpenMeasurementsinthe Job Link® app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 Viewlivemeasurementsonyourmobiledevice
up to 350 feet away.
What's Included
Job Link® System Flex Psychrometer Probe
1 Protective Slip Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
Description
The JL3RH Job Link® System Flex Psychrometer
Probe sends air measurements directly to the
Fieldpiece Job Link® app up to 350' away.
Measure %RH, dry bulb, wet bulb, dew point,
and enthalpy at a register/grille, in the duct, or
just walking around. Bend the flexible probe and
slide the magnet to conveniently configure the
JL3RH to your situation.
The rubberized protective housing is both
ergonomic and rugged for daily use. Flip the
switch and app immediately knows which
side of the system you're going to place your
psychrometer probe.
Use the long wireless range, strong
magnet, and flexible probe for quick and easy
psychrometrics testing.
Maintenance
CLEANING: Clean the exterior with a damp
cloth. Do not use detergents or solvents. Do not
touch the sensor.
BATTERIES: When the LED slow blinks Red,
the batteries must be replaced. Ensure the
power is OFF. Remove the single screw from the
yellow battery cover. Install 2 x AAA batteries.
Monitor battery life in the app's tool manager.
SENSOR CARE: Cover the sensor with the
slip cover when not in use. Extreme conditions
or exposure to solvent vapor may offset the
RH sensor. To re-calibrate, place the sensor in a
controlled environment of 75%RH and between
68°F - 86°F for a period of 24 hours. To create a
75%RH environment, add wet salt to a clean
open container (bottle cap). Be careful to not
let the solution touch the probe. Place this
container and the probe in a large sealed bag
at room temperature, undisturbed for 24 hours.
Job Link® System
Flex Psychrometer
Probe
OPERATOR'S
MANUAL
Model JL3RH
www.fieldpiecejoblink.com
WARNING
Prevent damage, do not drill holes blindly into a plenum that
houses the evaporator or heat exchanger.
Fieldpiece

01 02 03 04 05
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android™ 5.0
(Latest compatibility at www.fieldpiece.com)
Battery Type: 2 x AAA, NEDA 24A, IEC LR03
Battery Life: 150 hours typical alkaline. LED blinks red when
battery replacement is needed.
Auto Power Off: 2 hours (APO can be disabled)
Wireless Range: 350 feet (107 meters) line of sight.
Obstructions affect distance.
Radio Frequency: 2.4 GHz
Operating Environment: 32°F to 122°F (0°C to 50°C) at <75% RH
Storage Temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with batteries removed)
Temperature Coefficient: 0.1 x (specified accuracy) per 1.8°F
(32°F to 64°F, 82°F to 122°F), per 1°C (0°C to 18°C, 28°C to 50°C)
Weight: 0.33 lbs (150 g)
Flexible Probe: 0.36" (9mm) diameter; 9.25" (235mm) length
US Patent: www.fieldpiece.com/patents
Relative Humidity (%RH)
Sensor Type: Capacitance polymer film
Hysteresis: ±1%RH typical (Excursion of 10% to 90% to 10%RH)
Measurement Range: 0%RH to 100%RH
Accuracy: (At 73.4°F (23°C))
±2.5% (10%RH to 90%RH); ±(5%) <10%RH, >90%RH
Response Time: 60 seconds typical for 90% of total range
Temperature
Sensor Type: Precision thermistor
Measurement Range: -4°F to 140°F (-20°C to 60°C)
Accuracy: ±(1°F) 32°F to 113°F, ±(0.5°C) 0°C to 45°C;
±(2°F) -4°F to 32°F, 113°F to 140°F, ±(1°C) -20°C to 0°C, 45°C to 60°C
Quick Start
1 Install the Fieldpiece Job Link® system app on
yourmobile deviceandsignup foran account
if you're a new user.
2 Removethesinglescrewof the yellowbattery
cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 OpenMeasurementsin the Job Link® app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 Viewlivemeasurementsonyourmobiledevice
up to 350 feet away.
What's Included
Job Link® System Flex Psychrometer Probe
1 Protective Slip Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
Description
The JL3RH Job Link® System Flex Psychrometer
Probe sends air measurements directly to the
Fieldpiece Job Link® app up to 350' away.
Measure %RH, dry bulb, wet bulb, dew point,
and enthalpy at a register/grille, in the duct, or
just walking around. Bend the flexible probe and
slide the magnet to conveniently configure the
JL3RH to your situation.
The rubberized protective housing is both
ergonomic and rugged for daily use. Flip the
switch and app immediately knows which
side of the system you're going to place your
psychrometer probe.
Use the long wireless range, strong
magnet, and flexible probe for quick and easy
psychrometrics testing.
Maintenance
CLEANING: Clean the exterior with a damp
cloth. Do not use detergents or solvents. Do not
touch the sensor.
BATTERIES: When the LED slow blinks Red,
the batteries must be replaced. Ensure the
power is OFF. Remove the single screw from the
yellow battery cover. Install 2 x AAA batteries.
Monitor battery life in the app's tool manager.
SENSOR CARE: Cover the sensor with the
slip cover when not in use. Extreme conditions
or exposure to solvent vapor may offset the
RH sensor. To re-calibrate, place the sensor in a
controlled environment of 75%RH and between
68°F - 86°F for a period of 24 hours. To create a
75%RH environment, add wet salt to a clean
open container (bottle cap). Be careful to not
let the solution touch the probe. Place this
container and the probe in a large sealed bag
at room temperature, undisturbed for 24 hours.
Job Link® System
Flex Psychrometer
Probe
OPERATOR'S
MANUAL
Model JL3RH
www.fieldpiecejoblink.com
WARNING
Prevent damage, do not drill holes blindly into a plenum that
houses the evaporator or heat exchanger.
Fieldpiece

06 07 08 09 10
Operation
Press for 1 second to power ON/OFF.
LED Color Indications
Green slow blink: normal operation
Red slow blink: batteries need to be replaced
Supply or Return Side Switch
The Job Link® system app knows which side
you have selected for each probe. Select Supply
air or Return air and place it on the system
appropriately.
Magnetic Hanger
You can slide the magnet to where you need
it. Slide it to the top and reach high grilles/
registers.
The magnet also holds the psychrometer in
place when testing in duct air. Just bend the
probe and slide into a 3/8" (10mm) hole in the
duct.
Remote Data Logging
(Data logging will be available shortly after time
of printing. Look for updates.)
Use the Job Link® system app to program
the JL3RH to log measurements starting at a
specific time of day for up to 7 days. Auto power
off disables.
1 Make sure JL3RH is powered OFF.
2 Open the Job Link® system mobile app.
3 Press for 5 seconds to enter data logging
mode. The LED will shine solid green.
4 Set up the probe's data logging parameters
within the app.The LED will blink green while
the app is sending setup instructions. The
LED will slow blink blue when waiting for
programmed start time to occur.
5 Place the JL3RH on the system.
6 When the programmed start time is reached,
theLED will veryslowlyblink greentoindicate
data logging has begun.
7 Whenthe programmedspanhasfinished,the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the app to extract
your data log from the JL3RH.
Auto Power Off (APO)
The probe will automatically power off after
2 hours.To disable APO until powered off, while
power is on tap twice. The LED will briefly
blink red. To enable APO, while power is on tap
twice. The LED will briefly shine red.
Limited Warranty
Thisprobeiswarrantedagainstdefects inmaterialandworkmanship
for one year from date of purchase from an authorized Fieldpiece dealer.
Fieldpiece will replace or repair the defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or unreasonable
use of the instrument.
Any implied warranties arising from the sale of a Fieldpiece product,
including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the above. Fieldpiece
shall not be liable for loss of use of the instrument or other incidental
or consequential damages, expenses, or economic loss, or for any claim
of such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply
to you.
Obtaining Service
For international customers, warranty for products purchased
outside of the U.S. should be handled through local distributors. Visit
our website to find your local distributor.
© Fieldpiece Instruments, Inc 2019; v15
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)

06 07 08 09 10
Operation
Press for 1 second to power ON/OFF.
LED Color Indications
Green slow blink: normal operation
Red slow blink: batteries need to be replaced
Supply or Return Side Switch
The Job Link® system app knows which side
you have selected for each probe. Select Supply
air or Return air and place it on the system
appropriately.
Magnetic Hanger
You can slide the magnet to where you need
it. Slide it to the top and reach high grilles/
registers.
The magnet also holds the psychrometer in
place when testing in duct air. Just bend the
probe and slide into a 3/8" (10mm) hole in the
duct.
Remote Data Logging
(Data logging will be available shortly after time
of printing. Look for updates.)
Use the Job Link® system app to program
the JL3RH to log measurements starting at a
specific time of day for up to 7 days. Auto power
off disables.
1 Make sure JL3RH is powered OFF.
2 Open the Job Link® system mobile app.
3 Press for 5 seconds to enter data logging
mode. The LED will shine solid green.
4 Set up the probe's data logging parameters
within the app.The LED will blink green while
the app is sending setup instructions. The
LED will slow blink blue when waiting for
programmed start time to occur.
5 Place the JL3RH on the system.
6 When the programmed start time is reached,
theLED willvery slowlyblinkgreentoindicate
data logging has begun.
7 Whenthe programmedspanhas finished,the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the app to extract
your data log from the JL3RH.
Auto Power Off (APO)
The probe will automatically power off after
2 hours.To disable APO until powered off, while
power is on tap twice. The LED will briefly
blink red. To enable APO, while power is on tap
twice. The LED will briefly shine red.
Limited Warranty
Thisprobeiswarrantedagainstdefectsin materialandworkmanship
for one yearfromdate ofpurchasefrom anauthorized Fieldpiece dealer.
Fieldpiece will replace or repair the defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or unreasonable
use of the instrument.
Any implied warranties arising from the sale of a Fieldpieceproduct,
including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the above. Fieldpiece
shall not be liable for loss of use of the instrument or other incidental
or consequential damages, expenses, or economic loss, or for any claim
of such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply
to you.
Obtaining Service
For international customers, warranty for products purchased
outside of the U.S. should be handled through local distributors. Visit
our website to find your local distributor.
© Fieldpiece Instruments, Inc 2019; v15
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)

06 07 08 09 10
Operation
Press for 1 second to power ON/OFF.
LED Color Indications
Green slow blink: normal operation
Red slow blink: batteries need to be replaced
Supply or Return Side Switch
The Job Link® system app knows which side
you have selected for each probe. Select Supply
air or Return air and place it on the system
appropriately.
Magnetic Hanger
You can slide the magnet to where you need
it. Slide it to the top and reach high grilles/
registers.
The magnet also holds the psychrometer in
place when testing in duct air. Just bend the
probe and slide into a 3/8" (10mm) hole in the
duct.
Remote Data Logging
(Data logging will be available shortly after time
of printing. Look for updates.)
Use the Job Link® system app to program
the JL3RH to log measurements starting at a
specific time of day for up to 7 days. Auto power
off disables.
1 Make sure JL3RH is powered OFF.
2 Open the Job Link® system mobile app.
3 Press for 5 seconds to enter data logging
mode. The LED will shine solid green.
4 Set up the probe's data logging parameters
within the app.The LED will blink green while
the app is sending setup instructions. The
LED will slow blink blue when waiting for
programmed start time to occur.
5 Place the JL3RH on the system.
6 When the programmed start time is reached,
theLED willvery slowlyblinkgreento indicate
data logging has begun.
7 Whenthe programmedspanhas finished,the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the app to extract
your data log from the JL3RH.
Auto Power Off (APO)
The probe will automatically power off after
2 hours.To disable APO until powered off, while
power is on tap twice. The LED will briefly
blink red. To enable APO, while power is on tap
twice. The LED will briefly shine red.
Limited Warranty
Thisprobeiswarrantedagainstdefectsin materialandworkmanship
for one year from date of purchase from an authorized Fieldpiecedealer.
Fieldpiece will replace or repair the defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or unreasonable
use of the instrument.
Any implied warranties arising from the sale of a Fieldpiece product,
including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the above. Fieldpiece
shall not be liable for loss of use of the instrument or other incidental
or consequential damages, expenses, or economic loss, or for any claim
of such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply
to you.
Obtaining Service
For international customers, warranty for products purchased
outside of the U.S. should be handled through local distributors. Visit
our website to find your local distributor.
© Fieldpiece Instruments, Inc 2019; v15
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)

06 07 08 09 10
Operation
Press for 1 second to power ON/OFF.
LED Color Indications
Green slow blink: normal operation
Red slow blink: batteries need to be replaced
Supply or Return Side Switch
The Job Link® system app knows which side
you have selected for each probe. Select Supply
air or Return air and place it on the system
appropriately.
Magnetic Hanger
You can slide the magnet to where you need
it. Slide it to the top and reach high grilles/
registers.
The magnet also holds the psychrometer in
place when testing in duct air. Just bend the
probe and slide into a 3/8" (10mm) hole in the
duct.
Remote Data Logging
(Data logging will be available shortly after time
of printing. Look for updates.)
Use the Job Link® system app to program
the JL3RH to log measurements starting at a
specific time of day for up to 7 days. Auto power
off disables.
1 Make sure JL3RH is powered OFF.
2 Open the Job Link® system mobile app.
3 Press for 5 seconds to enter data logging
mode. The LED will shine solid green.
4 Set up the probe's data logging parameters
within the app.The LED will blink green while
the app is sending setup instructions. The
LED will slow blink blue when waiting for
programmed start time to occur.
5 Place the JL3RH on the system.
6 When the programmed start time is reached,
theLED will veryslowlyblinkgreentoindicate
data logging has begun.
7 Whenthe programmedspanhasfinished,the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the app to extract
your data log from the JL3RH.
Auto Power Off (APO)
The probe will automatically power off after
2 hours.To disable APO until powered off, while
power is on tap twice. The LED will briefly
blink red. To enable APO, while power is on tap
twice. The LED will briefly shine red.
Limited Warranty
Thisprobeiswarrantedagainstdefects inmaterialandworkmanship
for one year from date of purchase from an authorized Fieldpiecedealer.
Fieldpiece will replace or repair the defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or unreasonable
use of the instrument.
Any implied warranties arising from the sale of a Fieldpiece product,
including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the above. Fieldpiece
shall not be liable for loss of use of the instrument or other incidental
or consequential damages, expenses, or economic loss, or for any claim
of such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply
to you.
Obtaining Service
For international customers, warranty for products purchased
outside of the U.S. should be handled through local distributors. Visit
our website to find your local distributor.
© Fieldpiece Instruments, Inc 2019; v15
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)

06 07 08 09 10
Operation
Press for 1 second to power ON/OFF.
LED Color Indications
Green slow blink: normal operation
Red slow blink: batteries need to be replaced
Supply or Return Side Switch
The Job Link® system app knows which side
you have selected for each probe. Select Supply
air or Return air and place it on the system
appropriately.
Magnetic Hanger
You can slide the magnet to where you need
it. Slide it to the top and reach high grilles/
registers.
The magnet also holds the psychrometer in
place when testing in duct air. Just bend the
probe and slide into a 3/8" (10mm) hole in the
duct.
Remote Data Logging
(Data logging will be available shortly after time
of printing. Look for updates.)
Use the Job Link® system app to program
the JL3RH to log measurements starting at a
specific time of day for up to 7 days. Auto power
off disables.
1 Make sure JL3RH is powered OFF.
2 Open the Job Link® system mobile app.
3 Press for 5 seconds to enter data logging
mode. The LED will shine solid green.
4 Set up the probe's data logging parameters
within the app.The LED will blink green while
the app is sending setup instructions. The
LED will slow blink blue when waiting for
programmed start time to occur.
5 Place the JL3RH on the system.
6 When the programmed start time is reached,
theLED will veryslowlyblink greentoindicate
data logging has begun.
7 Whenthe programmedspanhasfinished,the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the app to extract
your data log from the JL3RH.
Auto Power Off (APO)
The probe will automatically power off after
2 hours.To disable APO until powered off, while
power is on tap twice. The LED will briefly
blink red. To enable APO, while power is on tap
twice. The LED will briefly shine red.
Limited Warranty
Thisprobeiswarrantedagainstdefects inmaterialandworkmanship
for one year from date of purchase from an authorized Fieldpiece dealer.
Fieldpiece will replace or repair the defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or unreasonable
use of the instrument.
Any implied warranties arising from the sale of a Fieldpiece product,
including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the above. Fieldpiece
shall not be liable for loss of use of the instrument or other incidental
or consequential damages, expenses, or economic loss, or for any claim
of such damage, expenses, or economic loss.
State laws vary. The above limitations or exclusions may not apply
to you.
Obtaining Service
For international customers, warranty for products purchased
outside of the U.S. should be handled through local distributors. Visit
our website to find your local distributor.
© Fieldpiece Instruments, Inc 2019; v15
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)

11 12 13 14 15
Certifications
and Module IDs
FCC Statement
This equipment has been tested and found to comply withthe limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and usedin accordancewith the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
(Example - use only shielded interface cables when connecting to
computer or peripheral devices).
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This device complies with Industry Canada licence-exempt RSS-247
standard. Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired
operation of the device.
IC Radiation Exposure Statement: This equipment complies
with IC RSS-102 radiation exposure limit set forth for an uncontrolled
environment. This equipment should be installed and operated with
minimum distance 0.5 cm between the radiator and your body.
Fieldpiece Instruments 1636West Collins Avenue, Orange, CA 92867
IFETEL Statement
La operación de este equipo está sujeta a las siguientes dos
condiciones: (1) es posible que este equipo o dispositivo no cause
interferencia perjudicial y (2) este equipo o dispositivo debe aceptar
cualquier interferencia, incluyendo la que pueda causar su operación
no deseada.
The operation of this equipment is subject to the following two
conditions: (1) thisdevice or device may notcause harmful interference,
and (2) this device or device must accept any interference, including
interference that may cause undesired operation.
ANATEL Statement
Este equipamento não tem direito à proteção contra interferência
prejudicial e não pode causar interferência em sistemas devidamente
autorizados.
This equipment is not subject to the protection from harmful
interference and may not cause interference with duly authorized
systems.
EN 300 328
2ALHR003
00263-18-10972
IC: Industry Canada
22518-BT003
IFETEL: Federal Telecom Institute
RCPFI2A18-0235
Regulatory Compliance Mark
Waste Electrical and
Electronic Equipment
Restriction of Hazardous
Substances Compliant

11 12 13 14 15
Certifications
and Module IDs
FCC Statement
This equipment has been tested and found to comply withthe limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and usedin accordancewith the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
(Example - use only shielded interface cables when connecting to
computer or peripheral devices).
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This device complies with Industry Canada licence-exempt RSS-247
standard. Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired
operation of the device.
IC Radiation Exposure Statement: This equipment complies
with IC RSS-102 radiation exposure limit set forth for an uncontrolled
environment. This equipment should be installed and operated with
minimum distance 0.5 cm between the radiator and your body.
Fieldpiece Instruments 1636West Collins Avenue, Orange, CA 92867
IFETEL Statement
La operación de este equipo está sujeta a las siguientes dos
condiciones: (1) es posible que este equipo o dispositivo no cause
interferencia perjudicial y (2) este equipo o dispositivo debe aceptar
cualquier interferencia, incluyendo la que pueda causar su operación
no deseada.
The operation of this equipment is subject to the following two
conditions: (1) thisdevice or device may notcause harmful interference,
and (2) this device or device must accept any interference, including
interference that may cause undesired operation.
ANATEL Statement
Este equipamento não tem direito à proteção contra interferência
prejudicial e não pode causar interferência em sistemas devidamente
autorizados.
This equipment is not subject to the protection from harmful
interference and may not cause interference with duly authorized
systems.
EN 300 328
2ALHR003
00263-18-10972
IC: Industry Canada
22518-BT003
IFETEL: Federal Telecom Institute
RCPFI2A18-0235
Regulatory Compliance Mark
Waste Electrical and
Electronic Equipment
Restriction of Hazardous
Substances Compliant

11 12 13 14 15
Certifications
and Module IDs
FCC Statement
This equipment has been tested and found to comply withthe limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and usedin accordancewith the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
(Example - use only shielded interface cables when connecting to
computer or peripheral devices).
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This device complies with Industry Canada licence-exempt RSS-247
standard. Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired
operation of the device.
IC Radiation Exposure Statement: This equipment complies
with IC RSS-102 radiation exposure limit set forth for an uncontrolled
environment. This equipment should be installed and operated with
minimum distance 0.5 cm between the radiator and your body.
Fieldpiece Instruments 1636West Collins Avenue, Orange, CA 92867
IFETEL Statement
La operación de este equipo está sujeta a las siguientes dos
condiciones: (1) es posible que este equipo o dispositivo no cause
interferencia perjudicial y (2) este equipo o dispositivo debe aceptar
cualquier interferencia, incluyendo la que pueda causar su operación
no deseada.
The operation of this equipment is subject to the following two
conditions: (1) thisdevice or device may notcause harmful interference,
and (2) this device or device must accept any interference, including
interference that may cause undesired operation.
ANATEL Statement
Este equipamento não tem direito à proteção contra interferência
prejudicial e não pode causar interferência em sistemas devidamente
autorizados.
This equipment is not subject to the protection from harmful
interference and may not cause interference with duly authorized
systems.
EN 300 328
2ALHR003
00263-18-10972
IC: Industry Canada
22518-BT003
IFETEL: Federal Telecom Institute
RCPFI2A18-0235
Regulatory Compliance Mark
Waste Electrical and
Electronic Equipment
Restriction of Hazardous
Substances Compliant

11 12 13 14 15
Certifications
and Module IDs
FCC Statement
This equipment has been tested and found to comply withthe limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and usedin accordancewith the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
(Example - use only shielded interface cables when connecting to
computer or peripheral devices).
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This device complies with Industry Canada licence-exempt RSS-247
standard. Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired
operation of the device.
IC Radiation Exposure Statement: This equipment complies
with IC RSS-102 radiation exposure limit set forth for an uncontrolled
environment. This equipment should be installed and operated with
minimum distance 0.5 cm between the radiator and your body.
Fieldpiece Instruments 1636West Collins Avenue, Orange, CA 92867
IFETEL Statement
La operación de este equipo está sujeta a las siguientes dos
condiciones: (1) es posible que este equipo o dispositivo no cause
interferencia perjudicial y (2) este equipo o dispositivo debe aceptar
cualquier interferencia, incluyendo la que pueda causar su operación
no deseada.
The operation of this equipment is subject to the following two
conditions: (1) thisdevice or device may notcause harmful interference,
and (2) this device or device must accept any interference, including
interference that may cause undesired operation.
ANATEL Statement
Este equipamento não tem direito à proteção contra interferência
prejudicial e não pode causar interferência em sistemas devidamente
autorizados.
This equipment is not subject to the protection from harmful
interference and may not cause interference with duly authorized
systems.
EN 300 328
2ALHR003
00263-18-10972
IC: Industry Canada
22518-BT003
IFETEL: Federal Telecom Institute
RCPFI2A18-0235
Regulatory Compliance Mark
Waste Electrical and
Electronic Equipment
Restriction of Hazardous
Substances Compliant

11 12 13 14 15
Certifications
and Module IDs
FCC Statement
This equipment has been tested and found to comply withthe limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and usedin accordancewith the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
. Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
(Example - use only shielded interface cables when connecting to
computer or peripheral devices).
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This device complies with Industry Canada licence-exempt RSS-247
standard. Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept
any interference, including interference that may cause undesired
operation of the device.
IC Radiation Exposure Statement: This equipment complies
with IC RSS-102 radiation exposure limit set forth for an uncontrolled
environment. This equipment should be installed and operated with
minimum distance 0.5 cm between the radiator and your body.
Fieldpiece Instruments 1636West Collins Avenue, Orange, CA 92867
IFETEL Statement
La operación de este equipo está sujeta a las siguientes dos
condiciones: (1) es posible que este equipo o dispositivo no cause
interferencia perjudicial y (2) este equipo o dispositivo debe aceptar
cualquier interferencia, incluyendo la que pueda causar su operación
no deseada.
The operation of this equipment is subject to the following two
conditions: (1) thisdevice or device may notcause harmful interference,
and (2) this device or device must accept any interference, including
interference that may cause undesired operation.
ANATEL Statement
Este equipamento não tem direito à proteção contra interferência
prejudicial e não pode causar interferência em sistemas devidamente
autorizados.
This equipment is not subject to the protection from harmful
interference and may not cause interference with duly authorized
systems.
EN 300 328
2ALHR003
00263-18-10972
IC: Industry Canada
22518-BT003
IFETEL: Federal Telecom Institute
RCPFI2A18-0235
Regulatory Compliance Mark
Waste Electrical and
Electronic Equipment
Restriction of Hazardous
Substances Compliant