PCE Instruments PCE-555 User manual

PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[e-mail]
PCE Instruments UK Ltd.
Units 12/13
Southpoint Business Park
Ensign way
Hampshire / Southampton
United Kingdom, SO31 4RF
From outside UK: +44
Tel: [phone]
Fax: [phone]
[e-mail]
www.pce-instruments.com/english
www.pce-instruments.com
Manual
Temperature Meter PCE-555
Version 2.0
Date of creation: 04.02.2015
Date of last change: 04.07.2016

Manual
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Contents
1Introduction ............................................................................................................. 2
2Safety notes ............................................................................................................. 3
3Specifications .......................................................................................................... 4
4System description ................................................................................................. 5
5Instructions .............................................................................................................. 6
5.1 To switch on the device.............................................................................................................. 6
5.2 To select the temperature to be measured and the unit ............................................................ 6
5.3 Humidity and ambient temperature measurement..................................................................... 6
5.4 MAX / MIN function..................................................................................................................... 6
5.5 To freeze / hold the reading........................................................................................................ 6
5.6 To switch the backlight on and off.............................................................................................. 6
5.7 Automatic Power Off................................................................................................................... 6
5.8 To replace the battery................................................................................................................. 6
6Disposal ................................................................................................................... 7
7Contact ..................................................................................................................... 7
7.1 PCE Instruments UK .................................................................................................................. 7
7.2 PCE Americas ............................................................................................................................ 7
1 Introduction
Thank you for purchasing a hygrometer PCE-555 from PCE Instruments.
This digital humidity and temperature meter which can also measure the wet bulb temperature and the
dew point temperature is commonly used in laboratories, in the construction industry, in building
technology, in different industrial sectors and in engineering. It is also very useful in the areas of
transportation and storage of food as it supports the prevention of mould. Since this hygrometer is quick
and compact, it can easily be used on-site.

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2 Safety notes
Please read this manual carefully and completely before you use the device for the first time. The device
may only be used by qualified personnel and repaired by PCE Instruments personnel. There is no
warranty of damages or injuries caused by non-observance of the manual.
- This meter may only be used as described in the manual. Otherwise, hazardous situations may occur.
- The device may only be used within the temperature and atmospheric humidity ranges laid down in the
specifications. Do not expose it to extreme temperatures, direct sunlight, extreme atmospheric humidity
or moisture.
- Never use the device when your hands are wet.
- Do not touch the sensor.
- The case should only be opened by qualified personnel of PCE Instruments.
- The instrument should never be placed with the user interface facing an object (e.g. keyboard side on a
table).
- You should not make any technical changes to the device.
- The appliance should only be cleaned with a damp cloth / use only pH-neutral cleaner, no abrasives or
solvents.
- Only use PCE accessories or equivalent along with the device.
- Check the case for visible damage before each use. If damage is visible, do not use the device.
- The meter must not be used in explosive atmospheres.
- The limit values for the measurements stipulated in the specifications must under no circumstances be
exceeded.
- In case of non-observance of these safety notes, damage to the device as well as injury of the user are
possible.
This manual is published by PCE Instruments without any guarantee.
We expressly point to our general guarantee terms which can be found in our general terms of business.
If you have any questions please contact PCE Instruments.

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3 Specifications
Measurement range humidity
0 % .. 100 % RH
Measurement range temperature
-30 °C … 100 °C / -30 °F … 199 °F
Measurement range dew point temperature
-30 °C … 100 °C / -22 °F … 199 °F
Measurement range wet bulb temperature
0 °C … 80 °C / 32 °F … 176 °F
Accuracy
± 2 % RH at 25 °C and 20 … 80 % RH,
otherwise ± 2.5 %
± 0.5 °C / ± 0.9 °F (at 25 °C),
otherwise ± 0.8 °C / ± 1.5 °F
Resolution
0.01 % RH, 0.01 °C / 0.01 °F
Response time % RH
approx. 10 sec (90 % at ambient temperature of 25
°C / 77 °F)
Hold function
Max Hold and Data Hold function
Display
4.5 digit dual LC display with backlight
Energy efficiency
Automatic Power Off after 15 minutes of inactivity,
can be deactivated (when the device is switched
off, first press and hold the Hold key and then
press the On/Off key at the same time. When the
display comes on, release both keys. The icon
will not be displayed anymore and the device will
not be powered off automatically anymore..
Sensor
One-chip multisensor module for relative humidity
with calibrated digital output
Sampling rate
2.5 times per second
Polarity
automatic, negative polarity indication
Overload
“OL“ icon is displayed
Power supply
1 x standard 9 V battery, NEDA1604 or 6F22
Battery indication
is displayed when the battery voltage falls
below the necessary level
Operating conditions
0 … 40 °C (32 … 104 °F), ˂ 80 % RH, non-
condensing
Storage conditions
-10 … 60 °C (14 … 140 °F), ˂80 % RH, non-
condensing
Dimensions
225 (H) x 45 (W) x 34 mm (D) / ≈8.86 (H) x 1.77
(W) x 1.34" (D)
Weight
200 g (≈0.44 lb)

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4 System description
Dew Po int
Wet Bul b
1) Humidity / ambient temperature probe: semi conductor sensor for humidity and temperature inside.
2) LC display: 4.5-digit dual LC display showing the units °C and °F as well as the relative humidity
percentage, the dew point temperature, the wet bulb temperature, low battery indication and “MIN / MAX
HOLD”.
3) MAX / MIN key
4) °F / °C / WBT / Dew Point selection key: key to select temperature, dew point temperature or wet
bulb temperature, either in °F or °C.
5) On/Off key: to switch the device on and off.
6) HOLD / key: Press this key to activate the HOLD function. The reading will then be held.
To switch the backlight on or off, press and hold the HOLD / key for more than 2 seconds.
7) Battery compartment

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5 Instructions
5.1 To switch on the device
Switch the device on by means of the On/Off key (5).
5.2 To select the temperature to be measured and the unit
Press the °F / °C / WBT / Dew Point selection key (4) to select between temperature, dew point
temperature or wet bulb temperature and to choose a unit. Press and hold the key until the desired
temperature to be measured appears along with the correct unit. The possible selections appear in the
following order: °C °F °C Dewpoint °F Dewpoint °C Wet Bulb °F Wet Bulb.
5.3 Humidity and ambient temperature measurement
1. Target the probe (1) at the area which you would like to measure and wait until the values have
stabilised.
2. Read the relative humidity, the values for the ambient temperature, the dew point temperature and the
wet bulb temperature which are indicated in the display (2).
Note: Do not immerse the probe in liquids as it is only suitable for air.
5.4 MAX / MIN function
1. Select the desired temperature to be measured and unit before activating the MAX / MIN function.
2. Press the MAX / MIN key to enter the MAX / MIN recording mode.
3. If you press the key once, MAX is selected and if you press it twice, MIN is selected. The device will
save the highest or the lowest value measured during the time between activation and deactivation of
the MAX / MIN function.
4. Press and hold the key for more than 2 seconds to finish the MAX / MIN recording.
5.5 To freeze / hold the reading
Press the HOLD / key (6) to hold the reading in the display. If you press this key again, you will return
to normal measurement mode.
5.6 To switch the backlight on and off
Press and hold the HOLD / key (6) for more than 2 seconds to switch the backlight on or off.
5.7 Automatic Power Off
To save battery voltage, the device is equipped with an Automatic Power Off function. The device
switches off automatically after 15 minutes of inactivity. The icon indicates that the Automatic Power
Off function is activated.
To deactivate the Automatic Power Off function
1. Switch off the device.
2. Press and hold the HOLD / key (6) and switch on the device by pressing the On/Off key (4) once.
3. After all icons have been shown in the display, release the HOLD / key (6). The icon will
disappear from the display. Automatic Power Off is now deactivated. When you switch on the device
next time, it will be activated again.
5.8 To replace the battery
When the icon appears in the display, the battery must be replaced. Open the battery compartment
and replace the old battery by a new one (1 x 9 V battery NEDA1604, 6F22 or similar).

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6 Disposal
For the disposal of batteries, the 2006/66/EC directive of the European Parliament applies. Due to the
contained pollutants, batteries must not be disposed of as household waste. They must be given to
collection points designed for that purpose.
In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use them or
give them to a recycling company which disposes of the devices in line with law.
If you have any questions, please contact PCE Instruments.
7 Contact
If you have any questions about our range of products or measuring instruments please contact PCE
Instruments.
7.1 PCE Instruments UK
By post:
PCE Instruments UK Ltd.
Units 12/13 Southpoint Business Park
Ensign Way, Southampton
Hampshire
United Kingdom, SO31 4RF
By phone:
02380 987 035
7.2 PCE Americas
By post:
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
33458 FL
USA
By phone:
561 320 9162