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PROTIMETER
HygroMaster-L
Amphenol
Advanced Sensors
BLD7750L and BLD7751L
Instruction Manual
INS7751_EN Rev. C
March 2019
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2 | INS7751 Rev. A
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Contents
Quick Start Guide ............................................................4
1.Introduction ...................................................................5
2. Safety considerations .................................................5
3. Product components and accessories: ..................5
4. Starting with the device ............................................5
5. HygroMaster-L modes ................................................6
5.1 Measurement mode: ............................................6
5.2 Settings .................................................................7
5.2.1 Changing Language ...........................................7
5.2.2 Changing the unit of measurement ....................7
5.2.3 Changing brightness: .........................................8
5.2.4 Setting Auto Off time: .........................................8
5.2.5 Buzzer ON-OFF: .................................................8
5.2.6 Calibration: .........................................................8
5.2.7 About ..................................................................8
6. Care and maintenance ...............................................9
7. Technical Specifications: ...........................................9
7.1 Operating Conditions ............................................9
7.2 Measurement specications: ...............................9
7.2.a Hygrostick Data (Nominal) ..................................9
7.2.b Short Quikstick Data (Nominal) ........................10
7.3 Physical specications: ......................................10
7.3.a Power ...............................................................10
7.3.b Size (HXWXD) ...................................................10
7.3.c Gross weight ....................................................10
7.4 Regulatory Compliance .......................................10
7.5 User interface ......................................................10
7.5.a Display ..............................................................10
7.5.b User application proles ..................................10
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Quick Start Guide
HygroMaster-L has 6 keys / buttons which will help turn ON
and OFF the unit as well as to navigate between different
modes and settings.
1. Power/ Enter Key :
2. Settings Key : Any time the user wishes to
3. Up Key & Down Key :
4. Right / Pause Key : Press to freeze / unfreeze
5. Back Key : to get back to the previous or main
a. Press once to switch ON the unit.
b. Press and hold for more than 3sec to
switch OFF the unit.
c. To select parameter / save option in
settings screen.
setup the device, can press this key to go to
settings menu.
a. To navigate between Dew point and
Mixing ratio in the Measurement screen.
b. To navigate between different
parameters and options in the settings
screen.
reading in the measurement screen.
screen.
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1.Introduction
The Protimeter HygroMaster-L is a versatile thermohygrometer. This product is used to measure relative
humidity, air temperature and dew point.
2. Safety considerations
►Battery: Do not charge the battery as the supplied
battery is a primary alkaline cell. Also dispose the batteries
considering the norms.
►Calibration: The accuracy specications for the
product are valid for one year from the date of calibration,
and the product requires recalibration after this period. User
need to be cautioned
►Battery replacement: Use same specication
battery or as recommended when replaced.
3. Product components and accessories
Protimeter HygroMaster-L uses analog or digital sensors
to measure RH and temperature. All Protimeter RH and
temperature sensors with this interface can be connected to
HygroMaster-L.
Hygrostick and Quikstick interface
The Hygrostick (POL4750), Quikstick (POL8750),
Short Quikstick (POL8751) and 30cm humidity probes
(BLD8755) measure relative humidity (%RH) and ambient
air temperature in rooms. They can be connected to the
HygroMaster-L instrument either directly or by means of the
extension lead.
4. Starting with the device (Turning ON and OFF)
Prior to initial use ensure that the 9V battery is installed
properly in to the device.
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Note: The battery status is indicated by an icon on the
display. When the low battery message appears, replace
the battery.
To switch ON, Press the power button momentarily.
Note: The HygroMaster-L switches OFF automatically
after a set time (can be set till 6 min) if no activity is
observed. (see instruction for setting the Auto OFF time)
To switch the instrument OFF immediately, press and
hold for at least 3 seconds and release.
Whenever the battery voltage falls below the threshold value,
the battery symbol starts blinking. If the battery voltage falls
below the operating level, the instrument prompts with the
message “low battery - Switching off the device” and turns
OFF automatically.
5. “HygroMaster-L” modes
The Protimeter HygroMaster-L primarily measures air
temperature and relative humidity.
5.1 Measurement mode:
The default mode while the device is turned ON is
measurement mode. The device will turn ON with the
measurement screen as below.
There are three values displayed on the measurement
screen. First display value is the primary value which is the
relative humidity. Second display is Ambient temperature
and the third can be switched between dew point and mixing
ratio. Third measurement can be changed according to the
need of the customer using or key.
The representations in the measurement mode is as in the
picture on the page 7.
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5.2 Settings
HygroMaster-L provides option to change parameters for the
measured value through the settings mode. At any point of
time when the unit is turned ON, if the button is pressed,
unit will get in to the settings mode as below.
If any setting needs to be changed or adjusted, then the
function / parameter can be selected by scrolling through
the menu using or and then pressing .
5.2.1 Changing Language
In the settings menu, select LANGUAGE by navigating with
or key. Press to select the language the unit
should display. Press to conrm and exit edit mode.
5.2.2 Changing the unit of measurement
UNITS to be used can be changed by selecting and getting
in to the edit mode. Pressing or key at this mode
will change the units between °C or °F. To apply the
setting and exit the edit mode, press .
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5.2.3 Changing brightness:
The backlight brightness can be increased or decreased by
selecting the Brightness menu and pressing . Brightness
can be changed in 10 levels using or key after
getting in to the edit mode. To apply the setting and exit the
edit mode, press .
5.2.4 Setting Auto Off time:
User can set the time to auto turn OFF the device in idle
condition. This can be set in minutes. A maximum of 6
minutes can be set for the device to turn off in idle condition.
Get in to the edit mode as mentioned earlier and then use
or key to change the Auto OFF time.
5.2.5 Buzzer ON-OFF:
User can set the buzzer ON of OFF based on the need. If the
user need an audible indication for each key press or during
different functionality switching, the buzzer should be turned
ON. This can be done getting in to the edit mode and then
using or key.
5.2.6 Calibration:
User should not be accessing this menu to ensure no
accidental loss of calibration data. This is purely a factory
calibration menu
5.2.7 About
The About screen gives information related to the device like
checking the device calibration status, probe serial numbers
etc. The screen will look like below.
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6. Care and maintenance
The Protimeter HygroMaster-L is a precision-built electronic
instrument that will provide many years of reliable service if
the following points are observed:
► When not in use, keep the HygroMaster-L instrument and
its accessories in the pouch. Store the pouch in a stable,
dust-free environment and keep it out of direct sunlight
► If the instrument is to be stored for more than four weeks
or if the low battery power symbol appears on the display,
remove the battery from the instrument.
► Check the condition of the HygroMaster-L accessories on
a regular basis and replace them if they become worn or
damaged.
► To preserve the calibration characteristics, Hygrostick
probes shouldn’t be exposed to saturated environments. If
this is unavoidable Hygrostick probes should be replaced
on a regular basis and their calibration should be checked
frequently.
7. Technical Specifications
7.1 Operating Conditions
Temperature - 0°C to 50°C
RH - 0 to 95% non-condensing
7.2 Measurement specifications:
7.2.a Hygrostick Data (Nominal)
Relative Humidity
Range: 30% to 40% RH – Accuracy: ±3% RH at 68°F (20°C)
Range: 41% to 98% RH – Accuracy: ±2% RH at 68°F (20°C)
Temperature
Range:14°F to 122°F (-10°C to 50°C)–Accuracy: ±0.6°F (±0.3°C)
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7.2.b Short Quikstick Data (Nominal)
Relative Humidity
Range: 0% to 10% RH, Accuracy: ±3% RH at 68°F (20°C)
Range: 10% to 90% RH, Accuracy: ±2% RH at 68°F (20°C)
Range: 90% to 100% RH, Accuracy: ±3% RH at 68°F (20°C)
Temperature Range
Range: 14°F to 122°F (-10°C to 50°C), Accuracy: ±0.6°F (±0.3°C)
7.3 Physical specifications:
7.3.a Power
Battery:
9V Alkaline ≥ 550mAH
Battery life visual indication on display.
7.3.b Size (HXWXD)
6.9 in X 3.2 in X 1.5 in (17.7 cm X 8.0 cm X 3.8 cm)
7.3.c Gross weight
Instrument only: 6.42 oz (182 g)
7.4 Regulatory Compliance
CE, RoHS, ETL
7.5 User interface
7.5.a Display
Graphical LCD
Size: 2”
Resolution: 176 X 220
Backlight (with adjustable brightness)
7.5.b User application profiles
Sticky memory last used application settings
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Notes:
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Customer Support Centers
U.S.A.
Amphenol Thermometrics, Inc.
967 Windfall Road
St. Marys, Pennsylvania 15857, USA
T: +1 814-834-9140
U.K
Amphenol Thermometrics (U.K.) Limited
Crown Industrial Estate Priorswood Road
Taunton, TA2 8QY, UK
T: +44 1823 335 200
www.protimeter.com
www.amphenol-sensors.com
©2019 Amphenol Thermometrics, Inc. All rights reserved.
Technical content subject to change without notice.
INS7751_EN Rev. C
March 2019
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