PCE Instruments PCE-WMM 50 User manual

Manual
Version 1.0
Date of creation: 31.05.2016
Date of last change: 28.11.2017
CO2 Analyser PCE-WMM 50
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[email protected]
www.pce-instruments.com/english
www.pce-instruments.com
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]
[email protected]

Manual
2
Contents
1Safety notes ............................................................................................................. 3
2Specifications .......................................................................................................... 4
2.1 Technical specifications.............................................................................................................. 4
2.2 Delivery content.......................................................................................................................... 5
3System description ................................................................................................. 6
3.1 Device......................................................................................................................................... 6
3.2 Display........................................................................................................................................ 9
4Getting started ....................................................................................................... 10
4.1 Preparation............................................................................................................................... 10
4.2 Power connection..................................................................................................................... 11
5Operation ............................................................................................................... 12
5.1 Further measuring functions..................................................................................................... 12
5.2 Settings..................................................................................................................................... 13
6Maintenance .......................................................................................................... 14
6.1 Repair, cleaning and maintenance........................................................................................... 14
6.2 Troubleshooting........................................................................................................................ 16
7Warranty ................................................................................................................. 16
8Disposal ................................................................................................................. 17
9Contact ................................................................................................................... 17
9.1 PCE Instruments UK ................................................................................................................ 17
9.2 PCE Americas .......................................................................................................................... 17

Manual
3
Thank you for purchasing a gas detector from PCE Instruments.
1 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. PCE Instruments
cannot be held liable for any damage or injuries caused by non-observance of the manual.
The device must only be used as described in this instruction manual. If used otherwise, this can
cause dangerous situations for the user and damage to the meter.
The instrument may only be used if the environmental conditions (temperature, relative humidity,
…) are within the ranges stated in the technical specifications. Do not expose the device to
extreme temperatures, direct sunlight, extreme humidity or moisture.
When the air quality meter is exposed to extreme heat, fire and explosions as well as
deformations of the device are very likely.
Do not expose the CO2 analyser to any impact, shocks or vibration.
The case should only be opened by qualified PCE Instruments personnel. Touching the electrical
conductor inside the instrument can cause electric shocks.
Never use the meter when your hands are wet.
You must 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.
The device must only be used with accessories from PCE Instruments or equivalent. Using the
wrong mains adaptor can cause damage to the device as well as fatal injuries of the user.
The mains adaptor should be fixed tightly with the elastic plug lock, so that it can only be
removed using mechanical tools.
If you wish to connect a fan to the potential-free contacts of the sensor unit, make sure that the
fan has its own external power supply. Otherwise, the fan will not work. This can cause
dangerously high CO2concentrations in the monitored area.
Before each use, inspect the case for visible damage. If any damage is visible, do not use the
device.
Do not use the instrument in explosive atmospheres.
Pay special attention to the “ESC” indication in the display. If it appears, adopt protective
measures before entering the room where the sensor unit has been installed.
Check the cable connection between the sensor unit and the remote display unit thoroughly. The
cable is connected to the remote display unit’s input, coming from the sensor unit.
Communication between the sensor unit and the remote display unit should work flawlessly.
Therefore, you should use the “DIAG” function to test flawless communication.
The limit values for the measuring variables as stated in the specifications must under no
circumstances be exceeded.
Non-observance of the safety notes can lead to damage of the device or injuries of the user.
Moreover, observe the applicable national health and safety regulations and those set up by the
relevant trade associations in your country, as well as any relevant regulations for safe and
professional operation. Particularly, make sure to comply with your national accident prevention
regulations for the handling of gases.
This instruction 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.

Manual
4
Safety symbols
Safety-related instructions the non-observance of which can cause damage to the device or personal
injury carry a safety symbol.
Symbol
Designation / description
General safety symbol
Non-observance can cause personal injury and/or damage to the device.
Warning of electric voltage
Non-observance can cause electric shocks.
2 Specifications
2.1 Technical specifications
Sensor unit
Measured gas
carbon dioxide (CO2): 0 ... 50,000 ppm (5 %) (vol.) NDIR sensor
Temperature (gas /
environment)
0 ... +45 °C
Supply of gas samples
by diffusion
Alarm contacts
- 1 potential-free normally open contactor to control external devices
by releasing alarm 1
- switching power: 30 V DC / 250 V AC, max. 2 A
Alarm thresholds
Alarm 1
0.5 / 1 / 1.5 / 2 %
Alarm 2
1.5 / 2 / 2.5 / 3 / 3.5 / 4 %
Menu items
Function test of connection between sensor unit and remote display
unit, calibration, switching between °C and °F, alarms 1, 2 and factory
default settings
Display elements
- 4-digit digital display for measured gas concentration within range
0 ... 9999 ppm
- 3-digit digital display for measured gas concentration within range
1 ... 5 %
- additional 3-digit digital display for measurement and temperature in
°C and °F
- LEDs for operation, alarms 1, 2 and monitoring of voltage supply
Operating elements
Reset, menu selection, Enter
Safety
continuous self-surveillance of temperature range, sensor life,
implausible values, EEPROM system, internal data transfer
Enclosure
plastic, IP 54, splash-water proof
Voltage Supply
Mains adaptor 100 ... 240 V AC, 50 / 60 Hz
Diameters
168 x 125 x 47 mm (without connections)

Manual
5
Remote display unit
Temperature (gas /
environment)
0 ... +45 °C
Menu items
- 4-digit digital display for gas concentration within range
0 ... 9999 ppm
- 3-digit digital display for concentration within range 1 ... 5 %
- additional digital display to measure temperature in °C and °F
- LEDs for operation, alarms 1, 2 and monitoring of voltage supply
Display elements
Function test, Reset, menu selection, Enter, shifting between °C
and °F
Enclosure
aluminium, IP 54, splash-water proof
Voltage supply
via data cable to gas detector
Dimensions
118 x 85 x 34 mm (without connections)
2.2 Delivery content
1 x gas detector PCE-WMM 50
1 x instruction manual

Manual
6
3 System description
3.1 Device
The gas detector PCE-WMM 50 is equipped with a buzzer as well as a visual indication. These are
activated when the CO2 concentration reaches or exceeds a threshold previously set. Also, high CO2
concentrations activate a potential-free contact which can, for instance, activate a fan which reduces the
increased CO2 concentration in the room concerned.
Sensor unit
A LC display
B Yellow LED (error indication)
C Red LED 2 (AL2)
D Red LED 1 (AL1)
E Green LED (power supply)
F Reset key
G Mode key
H Enter key
I Communication cable to remote display
J Potential-free contact:
Red cable
White cable
Blue cable (central contact of the relay)
K Power supply
L Rubber protective cap
M Gas input
N Buzzer

Manual
7
The sensor unit must be installed in the room to be inspected, such as a room where CO2gas bottles are
stored. The LC display shows the CO2 concentration in the ambient air as well as the temperature. When
the green LED glows constantly, the power supply of the device is granted.
If “ESC” is indicated in the LC display of the remote display unit, you must adopt protective
measures before entering the room where the sensor unit has been installed. Check the room’s
ventilation and find out whether there is a CO2 leak, wearing protective clothing / equipment. As soon as
the CO2 concentration in the ambient air has reached the second alarm threshold, “ESC” appears in the
display of the sensor unit as well as in the display of the remote display unit. The yellow LED “FLT”
(standing for fault) flashes. Use the „ReFactSet“ function to reset the gas leak detector to factory defaults.
The “ESC” indication should now disappear. Alternatively, you can remove the mains adaptor and plug it
back into the socket.
The sensor unit has the following functions:
DIAG Communication test between sensor unit and remote display unit
CAL Calibration of gas detector
ReFactSet Reset to factory default settings
You can set two alarm thresholds:
AL1
AL2
1. Alarm threshold
Selectable threshold values: 0.5 %; 1 %; 1.5 %; 2
%
(Factory default setting: 1.5 %)
When the CO2concentration exceeds the first
threshold value, the red AL1 LED (LED 1) will flash,
the buzzer will sound and the potential-free contact
will close if the red and blue cables are connected
or closes when the white and blue cables are
connected.
The AL1 LED will stop flashing and the buzzer will
stop sounding as soon as the CO2concentration
falls below the first alarm threshold value.
2. Alarm threshold
Selectable threshold values: 1.5 %; 2 %; 2.5 %; 3
%; 3.5 %; 4 %
(Factory default setting: 3 %)
When the CO2concentration exceeds the second
threshold value, the red AL1 and AL2 LEDs will
flash at the same time, the time between the
buzzer intervals becomes shorter and „ESC“
appears in the LC display.
When the CO2concentration falls below the second
alarm threshold, even if it falls below the first alarm
threshold, the red AL1 and AL2 LEDs will keep
flashing and the buzzer will sound until you restart
the device. To restart the gas meter, press the
“Reset“ key (F) or disconnect the mains plug from
the socket and plug it back in.

Manual
8
Remote display unit
O Green LED (power supply)
P Red LED 1 (AL1 )
Q Red LED 2 ( AL2)
R Yellow LED (error indication)
S LC display
T Enter key
U Mode key
V RJ45 connection (Output)
W RJ45 connection for sensor unit (Input)
X Buzzer

Manual
9
3.2 Display
Symbol
Meaning
Description
CO2concentration in ppm
CO2concentration in the
monitored room
Temperature (degrees Centigrade)
Temperature in the monitored
room in degrees Centigrade
Temperature (degrees Fahrenheit)
Temperature in the monitored
room in degrees Fahrenheit
Alarm
Alarm icon
Diagnosis
Test of communication between
the sensor unit and the remote
display unit
First alarm threshold
If the CO2concentration exceeds
the first alarm threshold,
- the red LED 1 flashes,
- the buzzer sounds and
- the potential-free contact
closes if the red and blue cables
are connected or closes if the
white and blue cables are
connected
Second alarm threshold
If the CO2concentration exceeds
the second alarm threshold,
- ”ESC”appears in the LCD
- the two red LEDs 1 and 2
flash,
- the buzzer sounds
Calibration
Calibration of the CO2 sensor if
the measurement value deviates
too much from the current CO2
concentration
Restore Factory Settings
Deletes all custom settings and
restores the factory default
settings.
Escape
Appears once the second alarm
threshold is exceeded, what
might be a sign of CO2leakage.
High
The CO2concentration is higher
than 5 %.

Manual
10
If “ESC” is indicated in the LC display of the remote display unit, you must adopt protective
measures before entering the room where the sensor unit has been installed. Check the room’s
ventilation and find out whether there is a CO2 leak, wearing protective clothing / equipment. As soon as
the CO2 concentration in the ambient air has reached the second alarm threshold, “ESC” appears in the
display of the sensor unit as well as in the display of the remote display unit. The yellow LED “FLT”
(standing for fault) flashes. Use the „ReFactSet“ function to reset the gas leak detector to factory defaults.
The “ESC” indication should now disappear. Alternatively, you can remove the mains adaptor and plug it
back into the socket.
The remote display unit shows the readings and safety warnings of the sensor unit. It is connected to the
sensor unit via a communication cable (cable length: max. 8 m). the remote display unit should not be
placed in the same room as the sensor unit. It should be mounted in a way which provides high visibility
and an easy reading of the CO2concentration before entering the room where the sensor unit is located.
The connection between both devices can be checked by using the “DIAG” function which is described in
the further course of this manual. To reset the PCE-WMM 50, the “Reset” key on the sensor unit is used.
4 Getting started
4.1 Preparation
When taking the PCE-WMM 50 out of its box, remove the protective rubber cap from the gas input
(M) and put it to position L. During operation, make sure that the gas input (M) is not blocked at any time.
1 power supply (ventilation)
2 fan
3 mains adaptor
4 sensor unit
5 gas bottles
6 / 7 remote display unit
8 door
Open the box and take out the sensor unit, the remote display unit and all accessory parts.
Mount the sensor unit in the area which you want to monitor. It should be placed 0.45 m above the
ground and as near as possible to the pipes and valves. Mount the wall mounting to a wall by using 4
screws. The sensor unit can be placed in the mounting afterwards. Make sure that the sensor unit sits in
the mounting tightly.
Mount the remote display unit outside of the room to be monitored. Mount the wall mounting to the wall by
using screws. The display unit can be placed in the mounting afterwards. Make sure the display unit sits
in the mounting tightly.

Manual
11
Connect the sensor unit to the remote display unit by using the communication cable which is wired to the
sensor unit. Make sure the cable is run properly and attach it to the wall by using cable clips. Once it is
plugged in the remote display unit, the devices can communicate with each other.
There is also a potential-free contact (J) wired to sensor unit which can be used to turn on or off a fan, for
example, which is used for ventilation of the monitored room. When the red and white cables are
connected, the contact closes. When the white and blue cables are connected, the contact closes.
B blue cable
R red cable
W white cable
1 power connection fan
2 fan
4.2 Power connection
Connect the mains adaptor to the wall socket. Attach the elastic safety strip to the power plug by using
screws and wall plugs. The strip should sit so tight that the plug cannot be pulled out of the socket without
using mechanical tools. Once the mains adaptor is connected to the power source, the Sensor unit and
the remote display unit start monitoring.
Check the communication between both devices by using the “DIAG” function which is described in the
further course of this manual. If all four LEDs flash and the buzzer makes a sound the communication is
good and both devices show the same readings on their displays.

Manual
12
5 Operation
When the remote display unit shows “ESC” you should take necessary safety actions before
entering the monitored room. Check the ventilation of the room and find out if there is CO2leakage while
using proper safety equipment. Once the CO2concentration in the air exceeds the second alarm
threshold, both devices (sensor unit and remote display unit) show an “ESC” indication on their displays.
The yellow LED “FLT” starts to flash. Use the “ReFactSet” function to restore the factory settings of the
gas detector. The “ESC” indication should disappear. You can also unplug the power plug from the wall
socket and plug it in again.
Make sure that the power plug sits in the wall socket tightly and that it is secured with the elastic
safety strip so that it cannot be unplugged without using mechanical tools.
When you take the PCE-WMM 50 out of its box, remove the protective rubber cap from the gas input
(M) and put it in position L. During operation, you should make sure that the gas input (M) is not blocked.
Once the mains adaptor is connected to a power source, the gas detector starts monitoring the CO2
concentration in the ambient air, as well as the ambient air temperature. Set up the threshold levels in a
way that the alarms are triggered early.
5.1 Further measuring functions
“DIAG” function
The communication between the sensor unit and the remote display unit should be checked on a regular
basis by using the “DIAG” function. To do so, press the “Mode” key until a “DIAG” indication appears on
the display. Now press the “Enter” key for confirmation. All four LEDs on the sensor unit should now start
to flash and the buzzer should make a noise. After that the same should happen with the remote display
unit as well. If this worked properly, the communication between both devices is good.
Calibration function
The gas detector should be calibrated at least every two years. To do so, you can use the ambient air
outdoors. The housing needs about 10 minutes to acclimate. Wait until the CO2reading on the display is
stable. The display should indicate between 380 and 420 ppm.
Do not breathe in the direction of the gas detector while calibrating it. This might falsify the readings.
Press the “Mode” key until a flashing “Cali” indication appears on the display. After that, press “Enter” to
confirm. Now the “Cali” indication is shown on the display continuously. Press and hold the “Mode” key for
at least 10 seconds. The calibration is carried out automatically. After 10 minutes, the display shows
“Pass” or “Fail”. “Fail” means that the calibration failed and has to be done again. “Pass” means that the
calibration was successful. Press the “Enter” key to exit the calibration function.

Manual
13
Restore factory settings
Using this function deletes all stored settings and sets the device back to factory default settings. This
might be reasonable if the calibration has not been done properly, for example.
To reset the gas detector, press the “Mode” key until “ReFactSet” appears on the display. Now press the
“Enter” key and the “mode” key afterwards. Now you can select between ”Yes” and “No”. Confirm your
selection by pressing “Enter”. When “Yes” was selected, the factory default settings are restored after the
confirmation.
5.2 Settings
Lock/unlock
The gas detector has an automatic lock function to prevent the settings from being changed
unintentionally. If you wish to adjust the settings you have to unlock the device first. To do so, press and
hold the “Mode” key and the “Enter” key at the same time for 5 seconds. Now the device is unlocked and
you can change the settings. After 30 minutes, the device will be locked again. To activate the lock
function manually, press and hold the “Mode” and “Enter” key once again for 5 seconds.
Change the temperature unit
To switch between “°C” and “°F”, press the “Enter” key.
AL1 and AL2 threshold levels

Manual
14
AL1
To adjust the AL1 threshold level, press the “Mode” key until “AL1” appears on the display and press
“Enter” to confirm. Now you can switch between the available options by pressing the “Mode” key. The
following options are available: 0.5 %, 1 %, 1.5 %, 2 %.
Select the desired option and press the “Enter” key to confirm.
AL2
To adjust the AL2 threshold level, press the “Mode” key until “AL2” appears on the display and press
“Enter” to confirm. Now you can switch between the available options by pressing the “Mode” key. The
following options are available: 1.5 %, 2 %, 2.5 %, 3 %, 3.5 %, 4 %.
Select the desired option and press the “Enter” key to confirm.
6 Maintenance
6.1 Repair, cleaning and maintenance
Repairing
Do not try to repair the gas detector on your own and do not manipulate the circuits. If the device is
broken, please send it back to PCE Instruments. Our trained personnel will repair the device, if possible,
and send it back to you.
Behaviour in case of CO2 leakage
If the remote display unit shows “ESC”, you should take proper safety actions before entering the
monitored room where the sensor unit is located. Check the ventilation of the room and find out if there is
a CO2leakage while using proper safety equipment.

Manual
15
Cleaning
Before cleaning the gas detector, unplug the mains adaptor. Then clean the device with a damp cloth.
Use only pH neutral cleaner, no abrasives or solvents. Liquid cleaning agents might damage the device.
Before cleaning the room where the sensor unit is located, put the protective rubber cap on the gas
input (M) to prevent water from getting into the device.
Maintenance
The communication between the sensor unit and the remote display unit should be checked on a regular
basis by using the “DIAG” function. If the buzzer on each device makes a noise and all four LEDs flash on
each device, the communication between both devices works properly.
The gas detector should be calibrated at least every two years.
Check the proper functionality of the gas detector at least every two years.

Manual
16
6.2 Troubleshooting
Error code
Possible cause
Indication
Possible solution
Sensor unit
Remote display
unit
Er3
Ambient temperature
exceeds measuring range
(0 … +50 °C // 32 … 122
°F)
- “Er3” flashing
- LED “FLT”
flashing
- buzzer makes
noise
- “Er3” flashing
- LED “FLT”
flashing
- buzzer makes
noise
Indications
disappear once
the ambient
temperature is
within the
measuring range
Er4
Measuring error or sensor
reached the end of its
lifetime
- “Er4”flashing
- LED “FLT”
flashing
- buzzer makes
noise
- “Er3” flashing
- LED “FLT”
flashing
- buzzer makes
noise
Unplug the power
plug from the wall
socket and plug it
in again. If this
does not help
please contact our
customer support.
Er5
Er6
EEPROM problem
- “Er5” and “Er6”
flashing
- LED “FLT”
flashing
- buzzer makes
noise
- “Er5” and “Er6”
flashing
- LED “FLT”
flashing
- buzzer makes
noise
Unplug the power
plug from the wall
socket and plug it
in again. If this
does not help
please contact our
customer support.
Er7
Internal data transfer error
- “Er7” flashing
- LED “FLT”
flashing
- buzzer makes
noise
- “Er7” flashing
- LED “FLT”
flashing
- buzzer makes
noise
Unplug the power
plug from the wall
socket and plug it
in again.
If indication only
appears on remote
display unit: check
the RJ45 plug on
the communication
cable and the
RJ45 input (W).
Er8
Accuracy of the CO2
sensor might deviate from
current CO2concentration
- “Er8” flashing
- LED “FLT”
flashing
- buzzer makes
noise
- “Er8” flashing
- LED “FLT”
flashing
- buzzer makes
noise
Unplug the power
plug from the wall
socket and plug it
in again. If this
does not help
please contact our
customer support.
°C / °F
Internal data transfer error
-
- °C / °F flashing
Check the RJ45
plug on the
communication
cable and the
RJ45 input (W).
LED “FLT”
Mains adaptor not
connected properly
- LED “FLT”
flashing
Unplug the power
plug from the wall
socket and plug it
in again.
7 Warranty
You can read our warranty terms in our General Business Terms which you can find here:
https://www.pce-instruments.com/english/agb.

Manual
17
8 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.
9 Contact
If you have any questions about our range of products or measuring instruments please contact PCE
Instruments.
9.1 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
9.2 PCE Americas
By post:
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
33458 FL
USA
By phone:
561 320 9162