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Psyclone GE
Sensing
Protimeter
Thermo-Hygrometer
Operating Manual
INS7800, Rev. A
(September 2007)
Psyclone is a Protimeter product. Protimeter has
Psyclone is a registered trademark of GE Sensing.
joined other GE high-technology sensing
businesses under a new nameGE Sensing.
Psyclone
TM
Protimeter Psyclone
Page 1
Introduction
The GE Protimeter Psyclone thermo-
hygrometer measures relative
humidity with psychometric
measurements, along with
temperature. One button enables start,
hold and OFF operation, and four
arrow keys allow you to set up and
change the measurements shown on
the LCD screen. An optional surface
temperature probe enables users to
determine if condensation is present.
Figure 1 below shows the Psyclone
control buttons, while Table 1 on the
next page lists the available
parameters.
Figure 1: The Psyclone (#BLD7800)
Control Buttons
On/Hold/Off
Hold for 2 sec
to enter Setup Page 2
Protimeter Psyclone
1 Displayed if �F units chosen in Setup
2 Displayed if �C units chosen in Setup
Table 1: Psyclone Measurement
Parameters
Parameter
Symbol
% Relative
Humidity
% RH
1
Grains per pound
GPP
2
Grams per kilo
Gram
g/kg
Dewpoint
Temperature
DEW POINT
Wet Bulb
Temperature
WET BULB
2
Kilo Calorie per
Kilogram
kcal/kg

1
British Thermal
Units per Pound
BTU/lb
Ambient
Temperature
AMBIENT
Surface
Temperature
SURFACE
Proximity to Dew
Point at the
Surface
TEMP DIFF Protimeter Psyclone
Page 3
Starting the Psyclone for the
First Time
The Psyclone comes with two AA,
1.5 V batteries already installed. To
begin using the meter, extend the
retractable probe and press the

(ON) button. The LCD screen briefly
flashes, similar to Figure 2 below.
After a few seconds, the meter
changes to measurement mode and
displays only the currently selected
parameters, as shown in Figure 3 on
the next page. Moisture readings
appear at the top, with temperature
measurements below.
Figure 2: Full Screen Display Page 4
Protimeter Psyclone
Starting the Psyclone for the
First Time (cont.)
Figure 3: Typical Screen Display
During Operation To freeze the Psyclone at a
particular reading, press the

button briefly. The Hold
message appears to the left of the
temperature reading, as shown in
Figure 2 on the previous page. To shut off the Psyclone, press the
button for 3 seconds, until the
message OFF appears before the
LCD blanks. Protimeter Psyclone
Page 5
Selecting Parameters and
Calculations
Use the four arrow keys to select the
parameters and calculations you want
to display. Press any of the arrow
keys to scroll to the parameter row
(shown in Figure 2); then press the
RIGHT arrow key to scroll to the
parameter or calculation. The reading
changes immediately, and the
parameter is set once the flashing
stops. Pressing
instantly selects
the parameter. To select the humidity
parameter (%RH, GPP or g/kg,
or Dew Point):
Scroll to the top row, and then to
the desired parameter.
Note:
If you have selected the
Psychometric Calculation On
option, your options include
the available calculations. Page 6
Protimeter Psyclone
Selecting Parameters and
Calculation (cont.) To select a calculation
(Minimum, Maximum or
Average):
Scroll to the middle row, and then
press the RIGHT or LEFT arrow
key to select the desired
calculation. The min/max/ave
calculations are made from the last
time the meter was powered up. If
no parameter is selected, all the
parameters in that row remain
solid (not blinking), and the
Psyclone displays the current
reading. Min/Max/Ave will
continue to calculate while in
these modes. Push the UP arrow to
return to free measurement mode. Protimeter Psyclone
Page 7
Setting User Options
To set up the user options to your
particular requirements, firmly press
and hold the
SETUP
key (the DOWN
arrow key) for 2 seconds. The lower
part of the screen appears similar to
Figure 4 below.
Figure 4: Setup Menu
The factory default settings are: Temp - Off Psy. Cal. Options - Off Device auto off - 3 mins Back Light - 0 mins (off)
Use the LEFT and RIGHT arrow
keys to scroll to the desired option,
and the UP and DOWN arrow keys
to set the desired selection. Once
selected, wait for the meter to return
to measurement mode or push the

button to save the change. Four
options are available: Page 8
Protimeter Psyclone
Setting User Options (cont.) Units �F/�C You can display
all temperature measurements in
either �F or �C. (Setting �C also
results in displaying other
parameters in metric units, such as
g/kg. Setting �F prompts the meter
to display other parameters in non-
metric units, such as GPP or grains
per pound.) Press the UP or
DOWN arrow key to toggle
between �F and �C units. Psychometric Calculations
You can extend the available
humidity measurements to include
psychometric calculations (Wet
Bulb Temperature, kcal/kg and
BTU/lb, shown in Figure 2). Press
the DOWN or UP arrow key to
turn on (or off) the Psychometric
Calculation options. When the
screen refreshes, you can then
select the desired calculation (see
the next page). Protimeter Psyclone
Page 9
Setting User Options (cont.) Back Light You can set the
back light for the LCD display to
remain on from 1 to 9 minutes at a
time. (If you set 0, the back light
is turned off.) Use the UP and
DOWN arrow keys to scroll to the
desired number of minutes after
the last button push. Device Auto OFF You can set
the Psyclone to shut off
automatically after from 1 to 9
minutes at a time. (If you set 0,
the automatic shutoff is turned
off.) Use the UP and DOWN
arrow keys to scroll to the desired
number of minutes to stay on after
the last button push. Page 10
Protimeter Psyclone
Using the Optional Surface
Temperature Probe (#BLD7710)
Note:
The Surface Temperature
(Surface) and Temperature
Difference (Temp Diff) appear
only if you are using the
surface temperature probe
option.
To obtain surface temperatures via the
optional probe:
1. Plug in the surface temperature
probe on the right side of the
Psyclone.
2. Scroll to the bottom row using the
UP or DOWN arrow keys, and
then select Surface or Temp Diff
on the screen. Selecting Ambient
uses the Psyclones internal
sensors.
3. Remove the black cap, exposing
the metal sensing strip on the
sensor.
4. Apply the metal strip on the probe
to the surface you wish to
measure. Protimeter Psyclone
Page 11
Using the Optional Surface
Temperature Probe (cont.)
In Surface mode, the reading shown
will be the surface temperature.
(Allow time for the reading to settle.)
In Temp Diff mode, the temperature
shown will be the proximity to Dew
Point (when condensation will occur).
For example, a reading of 5 degrees
would indicate that the surface
temperature is 5 degrees above the
Dew Point. A reading of -5 degrees
would indicate that the surface
temperature is 5 degrees below the
Dew Point and condensation is
present.
Figure 5: Optional Surface
Temperature Probe with Cap
Removed Page 12
Protimeter Psyclone
Caring for Your Psyclone When you have finished using the
Psyclone, retract the probe back
into the meter. Use the carrying case to shield the
Psyclone when not in use. Keep the Psyclone out of water,
and away from dirt and dust. If the Psyclone has been stored in
excessive heat or cold (i.e., a
vehicle), allow for increased
acclimation time. A low battery warning

appears when the battery has only
20% of its charge. To replace the
batteries, remove the panel on the
rear of the Psyclone and insert two
1.5 V, AA batteries. Do not use
rechargeable batteries.
Error Codes
E-1: Sensor probe not responding
E-2: CRC checksum error
If either of these codes appear,
contact GE Sensing. Protimeter Psyclone
Page 13
Replacement Parts
To order the parts listed below, or for
additional service, contact GE
Sensing at 800-833-9438 (North
America), +353 61 470200 (Europe
and Asia), or www.gesensing.co