Telaire Vaporstat™ Model 9002
Infrared Absolute Humidity Sensor
User Instructions
GE
Sensing
T62873-008
October 2006
Page 1 of 6
Introduction
The
GE Telaire Vaporstat
™
9002
sensor
measures in applications in the range of 0
to 80°F dew point. The sensor package is
designed for wall mounting. GE Telaire
offers enclosures for mounting in a variety
of applications including aspirated
sampling of in-duct concentrations,
outside air measurement and measurement
in wet environments.
This manual contains procedures for
installation, wiring and adjustment of the
sensor, and provides conversion
information to translate the dew point measurement of the sensor to
other measurements of humidity, including grains/lb and relative
humidity.
Field Calibration
The sensor features a dual-beam optical assembly that utilizes a neutral
reference measurement to adjust for changes that my occur in the optics.
Although this feature will minimize sensor drift, field calibration at
sensor installation and subsequent periodic calibration is still
recommended to maintain optimum accuracy.
Each sensor has an individually developed curve, based on a certified
chilled mirror hygrometer, with over 8 calibration points. This
individualized curve is stored in the sensor’s permanent memory and is
valid for the life of the sensor. Using a reference device to field calibrate
the sensor at a known concentration re-establishes its original calibration
accruacy. Reference devices include a calibrated reference dew point
sensor or GE Telaire’s Calibration Kit 2076.
Installing the Sensor
Install the sensor and the mount-
ing plate as follows:
1.
Prepare for installation by using
the mounting holes configured
for US or European junction
boxes.
2.
Use the mounting plate as a
template to mark the mounting
holes.
3.
Secure the mounting plate to the
wall or junction box and make
the necessary wire connections.
4.
Mount the Controller on the base
by aligning the top clips and then
securing to the bottom clips. A
“snap” sound will indicate that
the sensor is secure. The sensor
will now have power. A 2 minute
warm-up will take place. After 2 minutes, the sensor will stabilize
and display the “
Normal Mode
” (current water vapor
concentration).
5.
Using the procedure outlined in the section “Model 9002 Operating
Modes and Adjustments” , adjust the sensor to provide the proper
elevation correction for your location.
6.
Finish installation by sliding the cover over the menu keys and
secure with the screws being provided.
Wiring Diagrams (Typical)
The Model 9002 cannot be wired in a 2-wire configuration where the
power supply also carries the current output of the sensor. Only the 3-
and 4-wire configurations are possible, as shown in Figure 1 below.
Figure 1: Wiring Diagrams (3- and 4- Wires)
clear
mode
enter
clear
mode
enter
Vaporstat
M
o
u
nt
i
n
g
B
rac
k
et
1
2
Input
1
2
3
4
5
6
7
8
0-10V Output
Signal Ground
4-20mA
Output
Relay Norm Closed
Relay Common
Relay Norm Open
Not Used
Not Used
AC- / GND
AC+ / DC+
Use Either Output
0-10Vout
4-20mAout
L1
L2
18-30 VAC RMS
1
2
Input
1
2
3
4
5
6
7
8
Common
V
a
p
or
s
tat
M
o
u
nt
i
n
g
B
rac
k
et
0-10Vout
4-20mAout
L1
L2
18-30 VAC RMS
Signal Ground
L1
L2
18-30 VAC RMS
NC
NO
COM
Vaporstat
M
o
u
nt
i
n
g
B
rac
k
et
1
2
Input
1
2
3
4
5
6
7
8
1
2
Input
1
2
3
4
5
6
7
8
V
a
p
or
s
tat
M
o
u
nt
i
n
g
B
rac
k
et
Mounting Bracket Pin
Designations
AC Power 3-Wire System
Isolated AC Power 4-Wire
System
Using the Relay Contacts
