dol sensors DOL 53 Manuel
Technical User Guide
2www.dol-sensors.com DOL 53
1 Product description
DOL 53 consists of an electro chemical diffusion sensor and signal processing electronics. DOL 53 works like a
"nose". DOL 53 only transmits the concentration measured at the sensor. The measuring unit ppm (parts per
million) is a volume concentration. DOL 53 is connected to suitable control unit over a 3-wire cable. The mea-
suring signal during normal operation is between 0 V and 10 V.
Figure1: Operation curve.
DOL 53 is used for the stationary continuous monitoring of ammonia concentrations in the ambient air under at-
mospheric conditions.
1Connector and coupling
2Mounting lug
3Sensor
4Mounting ring
5LED green/yellow
6DOL 53 housing
7Dust cap
Safety-related information
• Before using this product, carefully read the Technical user guide.
• Strictly follow the Technical user guide. The user must fully understand and strictly observe the instructions.
Use the product only for the purposes specified in this document.
• Do not dispose of the Technical user guide. Ensure that they are retained and appropriately used by the
product user.
• Comply with all local and national rules and regulations associated with this product.
• Use only genuine spare parts and accessories. Otherwise the proper functioning of the product may be im-
paired.
• Do not use a faulty or incomplete product. Do not modify the product.
• Notify the supplier in the event of any component fault or failure.
Warning symbols and their meaning
The following warning symbols are used in this document to identify and highlight the relevant warning texts
which require increased care and attention on the part of the user. The meanings of the warning symbols are
defined as follows:
Technical User Guide
DOL 53 www.dol-sensors.com 3
Indicates a potentially hazardous situation which, if not avoided, could result in physical injury, or
damage to the product or environment. It may also be used to alert against unsafe practices.
Indicates additional information on how to use the product.
1.1 Product survey
140247 DOL 53 Ammonia sensor
140248 DOL 53 Replacement sensor head
140236 DOL 53 dust filter (5 pcs.)
DOL 53 measures the ammonia in the house's air.
Can be used for registration and control of ammonia levels in the air.
140238 DOL 53 protection against water
Kit for water protection for DOL 53.
140284 DOL 53 cable with connector (2 m)
2 meter wire with plug for DOL 53.
140285 DOL 53 test equipment gas, complete
Test equipment for NH3 measurement with DOL 53.
140299 DOL 53 – test gas adapter
Technical User Guide
4www.dol-sensors.com DOL 53
2 Installation
DOL 53 should be installed at the centre of the area to be monitored. This ensures optimum measurements.
DOL 53 must be installed out of reach of animals, accessible for maintenance work. It must be suspended from
the lug at the end of the housing or alternatively with a mounting bracket on the wall.
DOL 53 must not be mounted near the fresh air supply, in front of windows or doors, large electri-
cal consumers (electromagnetic influences), in exhaust air ducts, behind air washers or behind
screens. DOL 53 must not be mounted in inaccessible areas. Protect against direct exposure to
dust or splash water. For wall mounting, unobstructed gas entry must be ensured.
DOL 53 must not be suspended from the electric cable.
Figure2: DOL 53 must be mounted vertically with the sensor pointing down; ±30° at a location with low vibration and, as far
as possible, stable temperatures.
3 Connection
Installation, servicing and troubleshooting of all electrical equipment must be carried out by quali-
fied personnel in compliance with the applicable national and international standard EN 60204-1
and any other EU standards that are applicable in Europe.
The scope of delivery includes an approx. 2.5-
meter-long cable connection (5) for the electrical
installation up to the junction box (1). For the
electrical supply and signal transmission to the
control unit cables with adequate cross-section
must be used. Connect the cable from the instal-
lation kit to the connector (4) and in the junction
box (1). Connect the GND cable in the control
unit to protective earth.
The cable must be routed in a manner to obtain a
"water loop" (2) for water to drop off Insert the ca-
ble into the clamping device (3) at the mounting
lug. Do not stress the cable.
1. Remove the sensor element from the metal
container.
2. Insert it into DOL 53 (6).
3. Secure it with the mounting ring (7).
Technical User Guide
DOL 53 www.dol-sensors.com 5
Wire colour Configuration
White +24 Volt
Green GND
Brown 0 V to 10 V output
4 Commissioning
Switch on the supply voltage at the control unit. After activation or after an interruption of the supply voltage the
sensor must warm up for a defined period. This is indicated by the LED flashing green/yellow.
• The warmed up fault-free operation of DOL 53 is indicated after max. 30 minutes by the green LED being il-
luminated.
• A faulty operating state is indicated by the yellow LED flashing.
Technical User Guide
6www.dol-sensors.com DOL 53
5 LED indication
LED indication Sensor status
YELLOW flashing
slowly
Electrical supply faulty or inter-
rupted.
Check installation for cable break. Check opera-
tion of the power supply unit of the control unit.
Check electric voltage in the junction box or at
the sensing head with a multi-meter.
Short circuit in supply cable. Check installation for short circuit.
Overvoltage or undervoltage at the
sensing head.
Check operation of the power supply unit of the
control unit. Check electric voltage at the sensing
head with a multi-meter.
Incorrect voltage (e.g. 230 V AC)
applied, electronics damaged.
Replace the sensing head.
Sensing head faulty. Replace the sensing head, contact supplier.
Alternating GREEN
and YELLOW
Sensor is warning up to be ready
for measurements, signal level 0
V.
No activity. Flashing stops after max. 30 minutes.
Constant GREEN
Normal operation.
GREEN flashing
quickly
Concentration measurement in the
test window 40 ppm to 60 ppm, re-
sult of a test with 50 ppm test gas.
No activity. Flashing stops after max. 5 minutes.
Constant YELLOW
Internal fault detected by electron-
ics, signal level 0 V.
Replace the sensing head.
YELLOW flashing
Measured concentration below - 5
ppm, below the measuring range,
signal level 0 V.
If the fault continues for more than 1 day, replace
sensor.
GREEN flashing
Measured concentration above
105 ppm outside the measuring
range.
Ventilate with fresh air.
Alternating GREEN
and YELLOW
Age monitoring, sensor older than
3 years, service life expired, see
date on sensor rating plate.
Replace the sensor.
Technical User Guide
DOL 53 www.dol-sensors.com 7
6 Troubleshooting instructions
Error Cause Remedy
Packaging is damaged. Damage in transit. Contact the supplier in case the sensor is
damaged.
No measured value at the con-
trol unit.
Electrical connection faulty or in-
terrupted.
Check installation for cable break.
DOL 53 aligned incorrectly, not
vertical.
Install DOL 53 in accordance with mount-
ing instructions, vertical ±30°.
Sensor element faulty or used
up.
Replace sensor element.
Sensing head faulty. Replace the sensor.
Incorrect measured value at the
control unit.
Loss of sensitivity. Check sensitivity with test gas.
Filter clogged. Replace filter.
Unexpected measured value at
the control unit.
Brief interference pulses <5 sec-
onds.
Interference caused by electrical equip-
ment, e.g. lighting, fans or heaters. Iden-
tify device and suppress interference.
Unstable measured value. Dynamic signal fluctuations with
a period of more than 5 seconds
can arise from turbulence with
fresh air.
No activity, continue to monitor.
Wet sensor. DOL 53 was cleaned with water. Wipe DOL 53 dry.
Condensation.
7 Maintenance
The sensor element must be replaced after 3 years of operation at the latest. End of service life see date on the
sensor element rating plate.
Carry out the daily visual inspection to detect operation readiness.
Have specialists carry out the annual inspection and sensitivity check.
Replace the dust filter in front of the sensor element if clogged. A clogged filter prolongs the re-
sponse time of the sensor element. This affects the sensitivity. The dust filter must always be re-
placed prior to checking the sensitivity.
DOL 53 must be removed during cleaning and disinfection. After removing the connector, screw
on the screw plug. A missing screw plug leads to corrosion of the connector.
Cleaning
Clean DOL 53 surface with lukewarm water. Check for mechanical damage.
Disposal
Dispose of the product in accordance with the applicable rules and regulations.
Technical User Guide
dol-sensors a/s – Agro Food Park 15 – DK-8200 Aarhus N – T: +45 7217 5888 – F: +45 7217 5959 – www.dol-sensors.com
8 Technical data
Max. sensor element storage period See date on the label, sensor element box or shipping carton
Warranty for sensor element and DOL
53
2 years from delivery date
Expected sensor element service life 3 years from commissioning, expiration date see sensor element rat-
ing plate
Supply voltage Rated voltage 24 V (18 V to 30 V DC); DC < 0.2 Vss
Power consumption <10 mA
Signal transmission to the control unit 0 V to 10 V corresponds to 0 to 100 ppm
Measurement range 0 to 100 ppm NH3
Signal transmission resolution 0.5 ppm
Accuracy 1.5 ppm or ±10% of the measured value
Response time T50 <30 seconds
Long-term drift < ±10 % of the measured value/year
Cable type 3-wire
Ambient temperature (operation) 0 °C to + 50 °C
Ambient humidity (operation) 15% to 95% RH
Air pressure (operation) 700 hPa to 1300 hPa
Ambient temperature (storage) -20°C to +60°C
Dimensions (H x W) 155mm x 75mm
Housing material PA
Weight approx. 450 g
Chemical resistance Typical detergents, disinfectants, alcohol, surfactants, peracetic acid,
soap
Protection class IP 65
Compliance CE
Danger of damage to the sensor. The sensor must not be transported unpacked in air traffic. The
sensor can lose its measuring sensitivity.
8.1 Dimensioned sketch
Figure3: In mm.
604270 • 2021-01-11 • en-US • Made in Denmark
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