GE Hygromaster User manual

GE
Sensing
Hygromaster®
Protimeter Thermo-Hygrometer
Instruction Manual

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Table Of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1 Hygrostick® and Quikstick Humidity Probe Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2 Function Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3 Standard Functions – Humidity and Temperature Measurements . . . . . . . . . . . . . . . . . . . .6
4 Function Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5 Logging Functions - PC Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6 Logging Functions - Manual Logging (Recording) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7 Logging Functions - Reading the Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

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Introduction
The GE Protimeter Hygromaster is a handheld hygrometer with data logging capability. Spot
measurements of relative humidity, dew point, mixing ratio and ambient temperature are shown
on a split display at the touch of a button. Surface temperature can also be measured using an
optional surface temperature sensor.
When used as a data logger, the instrument is set to record measurements as required and is left
in place for the required period of time. The memory contents are then downloaded to a PC,
using optional software, where the logged measurements are displayed in tabular and graphical
form for quick and simple analysis.

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1Hygrostick
®and Quikstick Humidity Probe Options
The Hygromaster is used with a detachable humidity probe to measure relative
humidity and ambient temperature. Two humidity probes are available, the
Hygrostick and the Quikstick. The Hygrostick is optimized for measuring
humidity in the 30-100 %rh range and may be used with Protimeter humidity
sleeves for measuring the equilibrium relative humidity of solid walls and
floors. The Quikstick is a general purpose sensor, with a measurement range of
1-100 %rh, making it more suitable for general air quality applications.
Table 1 below lists the specifications for both Humidity Probes, which are shown in the
photograph above and are distinguished only by the color difference.
Table 1: Humidity Probe Dimensions
Humidity Probe Color Dimensions Nominal
rh Range
Nominal
Temperature
Range
Hygrostick Grey Ø8 mm x 50 mm 30 to 100 %rh 0 to 50 °C
Quikstick Black Ø8 mm x 50 mm 1 to 100 %rh -10 to 70 °C

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2 Function Buttons
The Hygromaster has four buttons (see Table 2 below) that are used individually or in pairs to
take measurements, log readings and set-up the instrument. When pressed individually they
perform the following standard functions:
For details of all button combinations, refer to Table 3 through Table 8.
Table 2: Function Buttons
Buttons Function
ON, OFF and hold
Upper level display scroll
 Lower level display scroll
Stores measurement in memory

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3 Standard Functions – Humidity and Temperature Measurements
Measure humidity and temperature as follows:
1. Connect the Hygrostick or Quikstick probe to the Hygromaster instrument either directly
into the socket on the top of the instrument or indirectly with the optional extension lead.
2. Switch the Hygromaster instrument ON by pressing briefly.
3. Press  successively to display relative humidity (%rh), dew point (TD) or mixing
ratio/absolute humidity (ppmw/gpp) on the upper display.
4. Press  successively to display air temperature (TA), surface temperature (TS), surface
to dew point temperature difference (Δ-T), time and date, probe serial number.

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5. To switch OFF, press and hold until display shows ‘OFF.’ Alternatively, the instrument
will switch itself OFF after a user-settable interval (default 2 minutes) from the last button
press or RS232 activity.
Note: The battery status will be shown for 3 seconds each time the instrument settings are
changed. Change the batteries immediately when 1 bar is shown, as < 10% of life
remains. See note below regarding clock.
Note: Ts and Δ-T will only be displayed if the auxiliary surface temperature sensor is
connected to the socket in the right hand side of the instrument and this later is set to
“ON”(see above). Otherwise, the lower display will show “OFF”changing to “—”after
3 seconds.
Note: Should successive readings on both halves of the display not change, the upper display
decimal is flashed to show that new readings are still being taken.
4FunctionTables
See Table 3 on the next page for Spot Measurements.

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Table 3: Spot Measurements
Button Function Display Symbols Explanation
ON, OFF, Hold II (pause) Switch ON - quick press
Switch OFF- press and hold for 3 sec
Hold value - quick press and release,
pause symbol flashes.
Humidity, dew point,
mixing ratio/absolute
humidity, air temp.
%rh TD
°C or °F
ppmw/gpp
Primary display scroll.
To change units see Instrument Set
Up (Table 7).
 Surface temperature,
surface - dew point
temperature difference,
time and date, probe
serial number
TA
Ts
Δ- T
Secondary display scroll.
Time is shown on upper display as
HH:MM. Date is shown on lower
display as MM:DD. Probe serial
number is scrolled across.
Stores measurement in
the instrument memory
Log Press and hold for 3 seconds to store
all measurements. Momentarily
displays the log record number and
stored data.

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See Table 4 below for Setup Functions.
Table 4: Setup Functions
Button Function Display Symbols Explanation
Enter logging
parameters set
up mode
When the instrument is ON, press
and hold buttons for 2 seconds to
enter data logger mode - see
Logging Set Up (Table 6).
& Enter
instrument set
up mode
When the instrument is ON, press
and hold buttons for 2 seconds to
enter instrument set up mode - see
Instrument Set Up (Table 7).
&
Short cut to
Surface
Temperature set
up modes
(RS 232 mode)
Switches surface temperature
socket ON, OFF (RS232 mode) or
Auto mode.

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See Table 5 below for Common Functions in Setup Modes.
Table 5: Common Functions in Setup Modes
Button Function Explanation
Slow incremental advance Increment the active parameter
 Fast incremental advance Fast increment the active parameter
Advance to next parameter Accept the selected parameter and advance
to next parameter. After final parameter,
save the settings.
Abandon set up Returns instrument to normal operation
without saving new settings.
&  Zeroes current parameter
settings
Resets the active parameter to minimum
value
(none) Timeout If no button is pressed for 5 seconds setup
mode exits without saving changes.