01
01
03
03
06
06
02
02
05
05
04
04
Quick Start
1. Connect ARH5 to Fieldpiece meter.
2. Select mVDC range on meter.
3. Remove vinyl slip cover from the
probe tip.
4. Select desired switch position on
ARH5 for temperature, wet bulb,
dew point, or %RH.
5. Read your measurement directly on
the display of the Fieldpiece meter.
Certifications
C-Tick (N22675)
CE
RoHS compliant
Description
With your purchase of the ARH5 you
now have the ability to take supply/
return temperature, %RH, wet bulb
and dew point measurements from
inside the duct or plenum.
Use the telescopic probe to take
measurements in hard to reach places.
Yo u r A R H 5 m e a s u re s b o t h
relative humidity and ambient
air temperature. It also calculates
dew point and wet bulb temperatures
automatically.
The ARH5 snaps directly onto
Fieldpiece HS series DMMs, Fieldpiece
Datalogger or HVAC Guide® System
Analyzer. For other meters, use
Fieldpiece ADLS2 test leads or the
AHDL1 handle adapter.
Use your ARH5 in combination with
the HVAC Guide and easily perform
Target Evaporator Exit Temperature
tests and get more reliable and
convenient Target Superheat
calculations.
Fieldpiece
In-Duct
Psychrometer
Head
OPERATOR'S
MANUAL
Model ARH5
Specifications
Telescoping Probe Length: Up to 38 inches (97cm)
Probe Tip Diameter: 0.35 inch (9mm)
Storage temperature: -4°F to 140°F (-20°C to 60°C), 0
to 80% RH (with battery removed)
Temperature Coefficient: 0.1 x (specified accuracy)/°C
(<18°C or >28°C)
Power: Single standard 9-volt battery, NEDA 1604, JIS
006P, IEC 6F22
Auto Power Off: Approx. 15 minutes
Battery life: 150 hours typical (alkaline)
Low Battery Indication: Red LO BATT LED will light to
indicate low battery.
Output Impedance: 500Ω approx.
Dimensions: 144mm(H) x 67mm(W) x 32mm(D)
Weight: Approx. 240g, including battery
Temperature:
Sensor type: Precision thermistor
Operating environment: -4°F to 140°F (-20°C to 60°C)
Range: -4°F to 140°F (-20°C to 60°C)
Resolution: 0.1°F / 0.1°C
Accuracy: ±(1°F) 32°F to 113°F
±(2°F) -4°F to 32°F, 113°F to 140°F
±(0.5°C) 0°C to 45°C
±(1°C) -20°C to 0°C, 45°C to 60°C
Output: 1mV to 1°F/°C
Relative Humidity:
Sensor Type: Capacitance polymer film
Operating environment: 32°F to 131°F (0°C to 55°C)
Range: 0% to 100%RH
Accuracy: ±(2.5%) 10% to 90%RH
±(5%) <10%RH and >90%RH
Note: Above accuracies stated at 73.4°F (23°C).
Output: 1mV to %RH
Sensor Response Time: 60 seconds typical for 90% of
total range.
Sensor Hystersis: ±1%RH typical (Excursion of 10% to
90% to 10%RH)
80
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
OFF
2000
2
2000
00
ET2W
MAX 30VDC
24VAC
CONNECT ONLY TO
ACCESSORY HEAD!
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
FUSED
200
mA
MAX
FUSED
30V
MAX
WIRELESS
ENABLED
MAX/MIN
SYNC
HOLD
CAT.III
MAX
600V
15 SEC FOR
500
mV
RANGE
AUTO-OFF
500
600
600
50
5000m
500m
500µ
50m
200m
200m
500m
5000m
50m
50500
500µ
500
750
500
1400
200
2K
200
20M
2K
200K
20
RECV
WARNING
Do not retract the sensor probe by pulling on the cord.
Doing so may sever the cord from the sensors.
Quick Start
1. Connect ARH5 to Fieldpiece meter.
2. Select mVDC range on meter.
3. Remove vinyl slip cover from the
probe tip.
4. Select desired switch position on
ARH5 for temperature, wet bulb,
dew point, or %RH.
5. Read your measurement directly on
the display of the Fieldpiece meter.
Certifications
C-Tick (N22675)
CE
RoHS compliant
Fieldpiece
In-Duct
Psychrometer
Head
OPERATOR'S
MANUAL
Model ARH5
80
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
WARNING
Do not retract the sensor probe by pulling on the cord.
Doing so may sever the cord from the sensors.
Specifications
Telescoping Probe Length: Up to 38 inches (97cm)
Probe Tip Diameter: 0.35 inch (9mm)
Storage temperature: -4°F to 140°F (-20°C to 60°C), 0
to 80% RH (with battery removed)
Temperature Coefficient: 0.1 x (specified accuracy)/°C
(<18°C or >28°C)
Power: Single standard 9-volt battery, NEDA 1604, JIS
006P, IEC 6F22
Auto Power Off: Approx. 15 minutes
Battery life: 150 hours typical (alkaline)
Low Battery Indication: Red LO BATT LED will light to
indicate low battery.
Output Impedance: 500Ω approx.
Dimensions: 144mm(H) x 67mm(W) x 32mm(D)
Weight: Approx. 240g, including battery
Temperature:
Sensor type: Precision thermistor
Operating environment: -4°F to 140°F (-20°C to 60°C)
Range: -4°F to 140°F (-20°C to 60°C)
Resolution: 0.1°F / 0.1°C
Accuracy: ±(1°F) 32°F to 113°F
±(2°F) -4°F to 32°F, 113°F to 140°F
±(0.5°C) 0°C to 45°C
±(1°C) -20°C to 0°C, 45°C to 60°C
Output: 1mV to 1°F/°C
Relative Humidity:
Sensor Type: Capacitance polymer film
Operating environment: 32°F to 131°F (0°C to 55°C)
Range: 0% to 100%RH
Accuracy: ±(2.5%) 10% to 90%RH
±(5%) <10%RH and >90%RH
Note: Above accuracies stated at 73.4°F (23°C).
Output: 1mV to %RH
Sensor Response Time: 60 seconds typical for 90% of
total range.
Sensor Hystersis: ±1%RH typical (Excursion of 10% to
90% to 10%RH)
OFF
2000
2
2000
00
ET2W
MAX 30VDC
24VAC
CONNECT ONLY TO
ACCESSORY HEAD!
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
FUSED
200
mA
MAX
FUSED
30V
MAX
WIRELESS
ENABLED
MAX/MIN
SYNC
HOLD
CAT.III
MAX
600V
15 SEC FOR
500
mV
RANGE
AUTO-OFF
500
600
600
50
5000m
500m
500µ
50m
200m
200m
500m
5000m
50m
50500
500µ
500
750
500
1400
200
2K
200
20M
2K
200K
20
RECV
Description
With your purchase of the ARH5 you
now have the ability to take supply/
return temperature, %RH, wet bulb
and dew point measurements from
inside the duct or plenum.
Use the telescopic probe to take
measurements in hard to reach places.
Yo u r A R H 5 m e a s u re s b o t h
relative humidity and ambient
air temperature. It also calculates
dew point and wet bulb temperatures
automatically.
The ARH5 snaps directly onto
Fieldpiece HS series DMMs, Fieldpiece
Datalogger or HVAC Guide® System
Analyzer. For other meters, use
Fieldpiece ADLS2 test leads or the
AHDL1 handle adapter.
Use your ARH5 in combination with
the HVAC Guide and easily perform
Target Evaporator Exit Temperature
tests and get more reliable and
convenient Target Superheat
calculations.
Go
wireless
with your ARH5 by
using Fieldpiece wireless transmitters
(ET2W/EH4W) to send measurements
over-the-air to Fieldpiece wireless
receivers (HG3, LT17AW, EH4W )
anywhere on the jobsite.
ARH5 w/ ET2W
transmitting wirelessly to HG3
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
Clear
Input
Output
Recall
Enter
Save
Sync
SETUP
Target
Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling
Combustion
HVAC Guide
CheckMe!
Fieldpiece
HG3
Data
Service
E
Exit T
Ex
Ex
E
e
Target
arget
arget
rget
rget
get
Targe
or
ator
ato
ator
ator
ator
Ta
Evaporat
t Temp
INPUT FORM
SH Table: Standard
Refrigerant: R-22
OD Dry Bulb:
85.4°F
Return WB:
63.0°F
SL Pressure:
52.4psig
SL Temp:
45.4°F
CustomerID: __JONES123
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
Clear
Input
Output
Recall
Enter
Save
Sync
SETUP
Target
Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling
Combustion
HVAC Guide
CheckMe!
Fieldpiece
HG3
Data
Service
E
Exit T
Ex
Ex
E
e
Target
arget
arget
rget
rget
get
Targe
or
ator
ato
ator
ator
ator
Ta
Evaporat
t Temp
INPUT FORM
SH Table: Standard
Refrigerant: R-22
OD Dry Bulb:
85.4°F
Return WB:
63.0°F
SL Pressure:
52.4psig
SL Temp:
45.4°F
CustomerID:
__JONES123
Use the RCONE1 for hands-free
in-duct measurements.
Figure 1
Go
wireless
with your ARH5 by
using Fieldpiece wireless transmitters
(ET2W/EH4W) to send measurements
over-the-air to Fieldpiece wireless
receivers (HG3, LT17AW, EH4W )
anywhere on the jobsite.
ARH5 w/ ET2W
transmitting wirelessly to HG3
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
Clear
Input
Output
Recall
Enter
Save
Sync
SETUP
Target
Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling
Combustion
HVAC Guide
CheckMe!
Fieldpiece
HG3
Data
Service
E
Exit T
Ex
Ex
E
e
Target
arget
arget
rget
rget
get
Targe
or
ator
ato
ator
ator
ator
Ta
Evaporat
t Temp
INPUT FORM
SH Table: Standard
Refrigerant: R-22
OD Dry Bulb:
85.4°F
Return WB:
63.0°F
SL Pressure:
52.4psig
SL Temp:
45.4°F
CustomerID: __JONES123
ARH5
In-Duct
Psychrometer
Head
ON
AUTO OFF
1%RH/mVDC
1°F/mVDC
1°C/mVDC
LO BATT
DEW POINT
%RH
WET BULB
TEMP
°F
°C
ON
OFF
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
Clear
Input
Output
Recall
Enter
Save
Sync
SETUP
Target
Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling
Combustion
HVAC Guide
CheckMe!
Fieldpiece
HG3
Data
Service
E
Exit T
Ex
Ex
E
e
Target
arget
arget
rget
rget
get
Targe
or
ator
ato
ator
ator
ator
Ta
Evaporat
t Temp
INPUT FORM
SH Table: Standard
Refrigerant: R-22
OD Dry Bulb:
85.4°F
Return WB:
63.0°F
SL Pressure:
52.4psig
SL Temp:
45.4°F
CustomerID:
__JONES123
Use the RCONE1 for hands-free
in-duct measurements.
Figure 1
