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Quick Start
Wireless Operation
1. Select DC or AC switch position,
depending on accessory head.
2. Select RECV or SEND, depending
on operation you want to perform.
3. Hold SYNC for one second. Search
pattern will initiate on display while
searching for partner device.
4. Set partner device to appropriate
switch position.
5. Hold SYNC on partner device for
one second. Signal bars and battery
info of partner device will display on
EH4W when connection is made.
6. Enjoy the wireless goodness!
Certifications
C-Tick (N22675)
CE EN 61326-1
FCC
WEEE
RoHS compliant
Description
As a new owner of EH4W you can
now wirelessly receive measurements
from anywhere on the jobsite and be
free from tangled wires. Your EH4W
can be set up to send you indoor
wet bulb measurements over-the-
air for real-time target superheat
calculations while you are outside at
the condenser taking actual superheat
readings.
Take measurements in multiple
places at once and have them sent
wirelessly to you anywhere you are
on the jobsite.
Your EH4W can wirelessly receive
measurements from any Fielpiece
transmitters and display the readings
wherever you are on the job.
EH4W also converts any Fieldpiece
accessory head into a wireless
transmitter to send your measurement
over-the-air to a Fieldpiece wireless
receiver like the HG3, LT17AW, or
EH4W. This allows you to set up your
accessory heads and monitor your
measurements from anywhere on
the jobsite.
Your EH4W easily syncs with
compatible wireless Fieldpiece
transmitters and receivers. EH4W has
a wide wireless range to cover the
whole jobsite.
Fieldpiece
Wireless Electronic
Accessory Head
Handle
OPERATOR'S
MANUAL
Model EH4W
Specifications
Wireless range:
Up to 75 feet (23m) line of sight
Minimum Wireless Distance:
Up to 1 foot (30cm)
Wireless Frequency:
910MHz to 920MHz (US),
868.1MHz to 868.5MHz (European)
Display:
5000 count FSTN LCD
Measurement Rate:
2.5 times per second, nominal
Overrange:
(OL) or (-OL) is displayed
Accuracy:
Stated at 73
o
F ±9
o
F (23°C ±5°C), <75% RH
Temperature Coefficient:
0.1 x (specified ac-
curacy) per °C [0°C to 19°C (32°F to 66°F), 28°C
to 50°C (82 °F to 122°F)]
Auto Power Off:
Approx. 30 minutes
Low battery indicators:
An empty battery icon
on LCD will indicate when batteries must
be replaced. Battery in lower left is for EH4W.
Battery in upper right is for partner device.
Power:
Single standard 9-volt battery, NEDA 1604,
JIS 006P, IEC 6F22
Battery life:
200 hrs typical with alkaline
Operating enviroment:
32
o
F to 122
o
F (0°C to 50°C)
at <70% relative humidity
Storage temperature:
-4
o
F to 140
o
F (-20°C to
60°C), 0 to 80% RH (with battery removed)
Dimensions:
140mm(H) x 59.2mm(W) x 33mm(D)
Weight:
Approx. 125g including battery
Safety:
Designed to meet CE-EMC.
DC Volts:
Ranges: 500mV, 5000mV (Auto)
Resolution: 0.1mV (500mV), 1mV (5000mV)
Accuracy: ±(0.5%rdg + 3dgts)
Input Impedance: 1MΩ
Input protection: Max 30 VDC or 24VAC rms
AC Volts (50Hz - 500Hz)
Ranges: 500mV, 5000mV (Auto)
Resolution: 0.1mV (500mV), 1mV (5000mV)
Accuracy: ±(1.2%rdg + 6dgts), 50Hz-100Hz
±(1.5%rdg + 6dgts), 100Hz-500Hz
Input Impedance: 1MΩ
Input protection: Max 30 VDC or 24VAC rms
Safety Symbols Used
Caution, refer to manual.
Ground
Double Insulation
How to Use
Normal Display Mode
1. Connect any Fieldpiece accessory
head to EH4W.
2. Select DC switch position for all
accessory heads expect the ACH4
current clamp (AC).
3. Select SEND switch position.
Transmitter Mode
EH4W
1. Connect any Fieldpiece accessory
head to the EH4W by sliding it onto
the top of the handle.
2. Select AC switch position for ACH4
current clamp or DC for all other
accessory heads.
3. Hold the RANGE (SYNC) button for
one second.
Note: Search pattern on LCD will initi-
ate. Once a connection is made, the
signal bars will stay solid represent-
ing signal strength.
Note: The signal strength and battery
condition of the EH4W will be dis-
played on the receiver LCD when a
connection is made.
Note: If no signal is found within two
minutes, EH4W will turn off.
Receiver (LT17AW, EH4W, HG3)
4. Select RECV switch position. Hold
SYNC button for one second. For
HG3, highlight the test line and hold
SYNC button for one second.
Note: If no signal is found in two min-
utes, NSG will display. Press SYNC
button for one second to re-sync.
Receiving Mode
EH4W
1.Select RECV switch position. Then
Hold RANGE (SYNC) button until
it beeps.
Note: If no signal is found within two
minutes, EH4W will stop search-
ing. Once connection is made, the
signal strength and battery life of
the partner device will be displayed
on EH4W.
Transmitter (ET2W)
1. Connect any Fieldpiece accessory
head.
2. Select AC switch position for ACH4
or DC for all other accessory heads.
3. Hold SYNC button for one second.
Transmitter (EH4W)
1. Connect any Fieldpiece accessory
head.
2. Select SEND switch position. Hold
RANGE button until beeps to sync.
Transmitter (LT17AW)
1. Select the desired measurement
range on the dial.
2. Hold SYNC button for one second.
Auto-Connection
The above operations are to
synchronize wireless devices for the
first time. When powered on, EH4W
will automatically connect to the
last single-link receiver (LT17AW,
ET2W, or EH4W) or transmitter it was
sychronized to. No need to constantly
sync the same pair.
Data Hold, Max, Min
Data Hold, Max, and Min are only
used when EH4W is in SEND switch
position. Data Hold, Max, and Min are
disabled in RECV switch position.
1. Press HOLD/MAX/MIN to freeze the
current reading on the display.
2. Press HOLD/MAX/MIN again to
show the highest (MAX) reading.
Press HOLD/MAX/MIN a third time
to show the lowest (MIN) reading.
3. Pressing HOLD/MAX/MIN will cycle
through these settings in the above
order.
4. Hold the HOLD/MAX/MIN button
for one second to exit and return
to real-time display.
Auto Power Off
Auto Power Off (APO) is automati-
cally disabled when EH4W is wirelessly
connected to a partner device. APO
can be manually disabled by holding
the HOLD/MAX/MIN button while
turning the switch from OFF to any
other switch position.
Maintenance
Clean the exterior with a dry cloth.
Do not use liquid.
Battery Replacement
The battery on the EH4W must be
replaced when the lower left battery
icon(
) is empty. At this point, the
EH4W will display "bAtt" on the screen
accompanied by a continuous beep.
The meter will turn off in 5 seconds
and no further measurement will be
allowed until the battery is replaced.
More Wireless...
Easily add to your wireless arsenal
any Fieldpiece accessory head with
ET2W transmitters. HG3 Multi-Channel
Wireless Analyzer receives wireless
readings from multiple transmitters.
MAX 30VDC
24VAC
CONNECT ONLY TO
ACCESSORY HEAD!
PRESS FOR 1 SEC TO EXIT
AUTO-OFF
SEND ONLY
EH4W
DC
AC
CAT.III
300V
400A
CLAMP
ACH4
AC Current
Clamp
1AAC / 1mVAC
400AAC MAX
!
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
AUTO OFF
ARH4
ET2W w/ ARH4
transmitting wirelessly
to EH4W
MAX 30VDC
24VAC
CONNECT ONLY TO
ACCESSORY HEAD
!
PRESS FOR 1 SEC TO EXI
T
AUTO-OFF
SEND ONLY
EH4W
DC
AC
!
!
WARNINGS
!
Use only with Fieldpiece accessory heads. Accessory
heads deliver low voltage (under 2V) to the EH4W.
Voltages higher than 30VDC or 24VAC rms can damage
the EH4W.
DO NOT CONNECT EH4W TO LINE VOLTAGE!
CAT.III
300V
400A
CLAMP
ACH4
AC Current
Clamp
1AAC / 1mVAC
400AAC MAX
!
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
AUTO OFF
ARH4
ET2W
with ARH4
ET2W
with ACH4
ET2W
with ACM3
Clea
r
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
Display
INPUT FORM
SET 01
Set ID:Indoor Temp
Measurement:
72.8
SET 02
SET ID:Comp Amps
Measurement:
23.6
CustomerID
: __JONES123
HG3 Multi-Channel
Wireless Receiver
data logging
multiple readings at
the same time
