Evikon E2618-NH3 User manual

Ammonia transmitter E2618-NH3 is a member of new PluraSens® family of
multifunctional measurement instruments. Applications include refrigeration
facilities, animal agriculture (cattle, pig and poultry livestock houses)., and other
confined spaces, where potentially dangerous concentration of ammonia can
accumulate.
The instrument utilises novel fully calibrated and temperature compensated
semiconductor metal oxide gas sensor with excellent repeatability, stability and
long lifetime. Electrochemical sensor is available on demand.
The transmitter is supplied either in duct-mount or wall-mount version. For the
wall-mount version the range of remote probe options is available.
Two analog outputs and RS485 digital interface with industry standard Modbus
RTU protocol can be used to connect the transmitter to safety or building
automation systems. .
Safety requirements
Always adhere to the safety provisions applicable in the country of use.
Do not perform any maintenance operation with the power on. Do not let water or
foreign objects inside the device.
Operating conditions
The device should be used in explosion-safe (non ATEX -rated) indoor areas,
without aggressive gases in the atmosphere. Allowed conditions are:
– temperature in the range of -40...+85 °C
– relative humidity in the range of 0...100%
– atmospheric pressure in the range of 84...106,7 kPa.
Installation and connection
1. Duct mount version: Assemble the sensor probe and connect it to the device
main unit. Make sure that the connections are tightened properly.
Cut a 25 mm diameter hole in the air duct at the chosen mounting place. Fix the 25
mm cable gland in the hole. Pass the sensor probe through the gland, adjust it to
the appropriate depth and tighten the gland’s screw. Unscrew four lid screws and
detach the lid from the instrument.
Wall mount version: Unscrew four lid screws and detach the lid from the
instrument. Fix the transmitter through mounting holes by screws.
The device should be mounted near the ceiling or in the breathing zone in
proximity to potential ammonia sources and away from ventilation holes or dead-air
spaces such as corners. Recommended coverage area for each transmitter is
80...120 m2(5...6 m radius).
2. Plug the power cable and connect the analog outputs and/or digital interface
terminals to the relevant devices according to the connection diagram.
Make certain that the cable gland is properly tightened to ensure the conformity to
IP65 protection class.
The screwless quick connect spring terminals on the E2618 series devices are
suitable for a wide range of wires with cross-section 0,2...1,5 mm2. The
recommended wire stripping length is 8...9 mm. Push the spring loaded terminal
lever, insert the wire end into terminal hole and release the lever.
Use twisted pair cable, e.g. LiYY TP 2×2×0,5 mm2or CAT 5, to connect the device
to RS485 network. Use one pair for A and B wires and the second pair for common
0 V and power +U wires. to connect the transmitter to Fieldbus network. Respect
polarity. Overall length of all connections via RS485 interface should not exceed
1200 m.
Place the lid back and tighten it with the four screws.
The type of each analog output can be independently changed between 4-20 mA
and 0-10 V with jumpers J1 (OUT1) and J2 (OUT2).
With closed jumper the output is 0-10 V, with open jumper the output is 4-20 mA.
By default both outputs OUT1 and OUT2 are assigned to gas concentration with
the scale 0-1000 ppm of ammonia. The device has built-in temperature sensor
which may be connected to any of the outputs.
The output assignments and scales can be changed by Modbus commands.
Sensor probe handling
The wall mount version of the transmitter is available with remote probe (see
drawing for dimensions).
The remote probe is connected to the main unit with shielded cable. The
connection cable length options are 3 m, 10 m or 25 m.
The sensor probes of all types are equipped with a hydrophobic microporous
PTFE filter to protect the sensor from dust, dirt and water drops. The round filter is
snap-fitted and may be replaced if it gets strongly contaminated.
To replace the PTFE filter, carefully hook the filter near it’s edge with a small flat
screwdriver and pull it off. Place a new filter onto the sensor opening and press it
to snap into the groove.
NB! Never stab or press the filter near its center where the sensor is located since
this may damage the sensor.
The recommended orientation of sensor probe is vertical with the sensor tip
pointing downwards. This prevents possible accumulation of condensed water on
the sensor protection filter. The horizontal orientation is also suitable. Avoid upward
position of the sensor tip.
Sensor heating-up
For best stability the gas detector should be powered permanently. If the
instrument is left for a long time in unpowered state, then after initial power-on the
metal-oxide gas sensor needs some time to heat up and burn adsorbed
contaminants.
4-20 mA/ 0-10 V
4-20 mA/ 0-10 V
0V / GND
0V
Controller
Power Supply
Input 1
Input 2 OUT1
OUT2
0V
A
BRS485
+U
J1 J2
Fieldbus
Sensor module
+12 V
J3
Dimensions of the E2618 wall-mount version
Dimensions of the E2618 duct mount version
Ø4 mm
55 80
130
82
50
70
36
77
Ø35...36 Ø50
120°
Ø65 80
327
Ø34 max
Hole
35
55
115
M16
82
80
Ø16

Emergency mode
The current outputs of the transmitter may be programmed via Modbus commands
to signal if the connection with the sensor is lost. The signal may be set to 3,8 mA
or 21,5 mA. See the table of Modbus registers for more information.
Return to default settings
To reset the device’s Slave ID, baudrate and sbit number to factory settings,
proceed as follows:
1. De-energize the device
2. Connect the J3 jumper
3. Turn on the device
4. De-energize the device
5. Disconnect the J3 jumper
6. Turn on the device
Calibration
E2618-NH3 has been calibrated by Manufacturer with standard gas mixtures
before delivery. The semiconductor gas sensor exhibits high stability and ~10 year
lifetime. However, as the gas sensor is directly exposed to environment, the
instrument requires at least annual field recalibration with a portable calibration kit.
For electrochemical sensor recalibration is necessary every 6 month.
Please contact your distributor for more information.
Delivery set
– Ammonia transmitter E2618-NH3 or E2618-NH3-DM
– Mounting accessories:
4 screws with plastic dowels for wall mount version
25 mm cable gland for duct mount version.
fixing clamp for remote probe versions
Warranty
This product is warranted to be free from defects in material and workmanship for a
period of one year from the date of original sale. During this warranty period
Manufacturer will, at its option, either repair or replace product that proves to be
defective. This warranty is void if the product has been operated in conditions
outside ranges specified by Manufacturer or damaged by customer error or
negligence or if there has been an unauthorized modification.
E2618-NH3_UM_EN Rev 05.05.2016
General technical data
Sensor type long-life metal-oxide gas sensor as standard
electrochemical cell on request
Detected gase/calibration Ammonia NH3
Gas unit ppm
Sampling method diffusion
Detection range 0...1000 ppm
Resolution 1 ppm
Accuracy ± 5 ppm
Warm-up time ≤10 min
Signal update every 1 second
Response time ~2 minutes
Self-diagnostics full functionality check at start-up
Power supply 11...30 VDC,
Power consumption < 2 W
Analog outputs 2 × 4-20 mA / 0-10 V, user settable, freely configurable
scales from 0-100 ppm to 0-1000 ppm
Digital interface RS485, Modbus RTU protocol
no galvanic isolation, common-mode voltage -7...+12 V,
Cable connections screwless spring loaded terminals
Enclosure grey ABS, wall mount, protection class IP65
Dimensions H82 × W80 × D55 mm
Operating environment industrial indoor and outdoor locations
Operating conditions -40...+85 °C, 0...100 %RH
Maintenance interval 12 month (6 month for electrochemical sell)
Sensor lifetime > 5 years
CE marking according to 2014/30/EU and EN61326-1 requirements
RS485 communication interface
Databits: 8
Parity: none
Stop bits: 1 or 2
Protocol: Modbus RTU
Supported Modbus functions:
03 - read multiple registers
06 - write single register
Communication parameters
Parameter Permitted values Default
Supported
baudrates
1200, 2400, 4800, 9600, 19200,
38400, 57600
9600
Data bits 8 8
Parity none none
Stop bits 1, 2 1
Protocol Modbus RTU
Modbus functions 03 - read multiple registers
06 - write single register
Error codes 01 - illegal function
02 - illegal data address
03 - illegal data value
04 - slave device failure
(details of last error 04 can be read from register 0x0008)
Evikon MCI OÜ Teaduspargi 7 , Tartu [email protected]
Tel.: [phone] Estonia www.evikon.eu
Ammonia transmitter
E2618-NH3
User manual

E2618 series Modbus holding registers
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
Addr Reg / MHR RW Description Supported values (dec) Default
0x0001 1 / 40002 R Hardware version -
0x0002 2 / 40003 R Software version -
0x0003 3 / 40004 R Product serial number 1...65535 -
0x0004 4 / 40005 RW Slave ID (net address) * 1...247 ** 1
0x0005 5 / 40006 RW Baudrate * 1200, 2400, 4800, 9600, 19200, 38400, 57600 9600
0x0006 6 / 40007 RW Response delay, ms 10...255 10
0x0007 7 / 40008 RW Stop bits * 1, 2 1
0x0008 8 / 40009 R Last error code 1...255 -
0x0011 17 / 40018 RW Restarts counter write ‘42330’ to restart device (no response will follow) -
0x0091 145 / 40146 RW Heater voltage pulse duration, ms 0...1000 ms 0
0x0092 146 / 40147 RW Sensor voltage pulse delay, ms 0...995 ms (values 0...4 reserved to set sensor type) 0
0x0093 147 / 40148 RW Sensor type specific parameter 0...65535 100
0x0094 148 / 40149 RW Sensor type specific parameter 0...65535 100
0x0095 149 / 40150 RW Sensor type specific parameter -32767...+32767 32000
0x0096 150 / 40151 RW Sensor type specific parameter -32767...+32767 100
0x0097 151 / 40152 R Sensor type code 0...65535 0
0x0098 152 / 40153 R Output units code 0 - ppm, 1 - ‰, 2 - % 0
* - The new value is applied after restart.
** - Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the
only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** - This value is dynamic and not kept in EEPROM after restart

E2618 series Modbus holding registers (continued)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
0x00A2 162 / 40163 RW Zero adjustment for temperature -32000...+32000 (-320,00...+320,00 °C) 0
0x00A5 165 / 40166 RW Zero adjustment for gas data, ADC -32000...+32000 ADC units 0
0x00A6 166 / 40167 RW Slope adjustment for gas data 1...65535 512
0x00A7 167 / 40168 RW Change rate limit for gas data, 1...32000, 0 - no limit 0
0x00A8 168 / 40169 RW Integrating filter time constant, s 1...32000 (seconds), 0 - no filter 0
0x00C9 201 / 40202 RW Parameter tied to analog output 1
0-none
1- temperature
2- gas concentration
9- forced Modbus control, value setin MHR / 40204
2
0x00CA 202 / 40203 RW Parameter tied to analog output 2
0-none
1- temperature
2- gas concentration
9- forced Modbus control, value setin MHR / 40205
2
0x00CB 203 / 40204 RW Forced value for analog output 1*** 0...1000 (0,0%...100,0% of outputscale) 0
0x00CC 204 / 40205 RW Forced value for analog output 2*** 0...1000 (0,0%...100,0% of output scale) 0
0x00FF 255 / 40256 RW Sensor and analog outputs status
bit[0]=0/1 - sensor present/absent, read-only!
bit[1]=0/1 - analog outputs deactivated/activated,
bit[2]= 0/1 - in case of sensor absent, turn signaling off/on analog output1,
bit[3]=0/1 - in case of sensor absent, turnon signaling with low current/high current
on analog output1; if bit[2]==0 this bit will be ignored,
bit[4]=0/1 - in case of sensor absent, turn signaling off/on analog output2
bit[5]=0/1 - in case of sensor absent, turnon signaling with low current/high current
on analog output2; if bit[4]==0 this bit will be ignored,
bit[6]=0/1 - current/voltage output detected on output1, read-only!
bit[7]=0/1 - current/voltage output detected on output2, read-only!
bit[8]=0/1 - LED deactivated/activated,
bit[9]=0/1 - buzzer deactivated/activated,
Note bits [8] and [9] arealways 0 for E2618 series
62d
0x0100 256 / 40257 R Raw temperature data, °C×100 signed integer, -4000...+8500 (-40,00...+85,00 °C) -
0x0101 257 / 40258 R Raw gas sensor data ADC data 0...4095 -
0x0102 258 / 40259 R Measured temperature, °C×100 signed integer, -4000...+12500 (-40,00...+125,00 °C) -
0x0103 259 / 40260 R Gas concentration, ppm / ‰ signed integer, -32000...+32000 (ppm / ‰) -
0x0105 261 / 40262 RW 0% value for analog output 1 signed integer, -32000...+32000 (ppm / ‰) 0
0x0106 262 / 40263 RW 100% value for analog output 1 signed integer, -32000...+32000 (ppm / ‰) 1000
0x0107 263 / 40264 RW 0% value for analog output 2 signed integer, -32000...+32000 (ppm / ‰) 0
0x0108 264 / 40265 RW 100% value for analog output 2 signed integer, -32000...+32000 (ppm / ‰) 1000
* - The new value is applied after restart.
** - Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the
only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** - This value is dynamic and not kept in EEPROM after restart