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Limited Warranty
This probe is warranted against defects in material and workman-
ship 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 merchant-
ability 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
Visit www.fieldpiece.com/rma for the latest information on
how to obtain service.
www.fieldpiece.com
© Fieldpiece Instruments, Inc 2017; v04
Quick Start
1 Install the Fieldpiece Job Link™ app on your
mobile device and sign up for an account if
you're a new user.
2 Remove the single screw from the yellow bat-
tery cover and install 2 x AAA batteries.
3 Press for 1 second to power on.
4 Open Measurements in the Job Link™ app and
favorite the probe to the tool manager.
5 Remove protective slip cover from tip.
6 View live measurements on your mobile device
up to 350 feet away.
Certifications
EN 300 328
FCC ID: 2ALHR003
RCM
WEEE
RoHS Compliant
Description
The JL3RH Job Link™ 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 Job Link™ 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 psychro-
metrics testing.
What's Included
Job Link™ Flex Psychrometer Probe w/Cover
2 x AAA Batteries
Operator's Manual
1 Year Limited Warranty
FCC Statement
This equipment has been tested and found to comply with the
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 used in accordance with the instruc-
tions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a par-
ticular 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.
. 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 com-
puter 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.
Fieldpiece Instruments
1636 West Collins Avenue
Orange, CA 92867
Fieldpiece
Job Link
™
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.
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™ 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 Job Link™ app updates.)
Use the Job Link™ 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™ 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,
the LED will very slowly blink green to indicate
data logging has begun.
7 When the programmed span has finished, the
LED blinks and powers OFF.
8 Repeat steps 1-3 and use the Job Link™ 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.
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 condi-
tions 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.
Specifications
Minimum Device Requirement:
BLE 4.0 devices running iOS® 7.0 or Android
TM
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 bat-
tery 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 0.6°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
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
Return Air
(Warm Air)
(Red)
Supply Air
(Cool Air)
(Blue)
