RS485 communication interface
See Annex 1
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
Remote sensor probe handling
The E2648 series devices are available with remote probe (see drawing below for
dimensions). The remote probe is connected to the main unit with shielded cable.
Default connection cable length is 3 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 filter may be replaced if it gets strongly contaminated. To replace the PTFE
filter, unscrew the M25 nut and remove the old filter. Place a new filter into the nut
and tighten it again.
NB! Never stab or press the filter near its centre 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.
Volatile Organic Compounds
Highly volatile organic liquids. The definitions of VOC may vary depending on
application field and country.
See Annex 2 for more information on the properties of various gases.
E2648-PID is intended to detect compounds with ionisation potential <10.6 eV. It is
suitable for most part of commonly used solvents.
Ionisation potentials for a selection of organic compounds are listed in Annex 3.
Calibration and maintenance
For detailed instructions see Annex 4. Read them carefully before maintenance.
Do not perform any maintenance operation with the power on.
Clean the device with soft damp cloth. Do not use any abrasive cleaning agents. Do
not immerse the device into water or any cleaning media.
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 unauthorised modification.
E2648-PID_UM_EN
Rev 08.06.2020
Specifications
Detected gases
VOCs with ionisation potential < 10.6 eV (see Annex 3)
Sampling method
diffusion
Sensor type
photoionization detector
Calibration
isobutylene
E2648-PID-40
E2648-PID-200
Typical detection range
0...40 ppm (isobutylene)
0...200 ppm (isobutylene)
Resolution / digital unit
1 ppb
1 ppm
Response time T90
< 3 s
Sensor lifetime
5 years
Calibration interval
monthly or more frequently depending on operating
conditions
Signal update
every 1 second
Load resistance
R
L
< (Us - 2 V) / 22 mA for 4-20 mA
R
L
> 250 kOhm for 0-10 V mode
Digital interface
RS485, Modbus RTU protocol
no galvanic isolation
Power supply options
11...30 VDC, 24 VAC or 90...265 VAC
Power consumption
< 2 VA
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Relay outputs
2 × SPST, max 5 A, 30 VDC / 250 VAC
Outputs assignment
OUT1 2 gas; OUT2 2 gas
Outputs scale width
not below 10 × resolution
recommended: 20-100% of the detection range
Cable connections
screwless spring loaded terminals
Enclosure
die-cast aluminium, wall mount, protection class IP66
Dimensions
H120 × W125 × D58 mm
Operating conditions
-40...+65 °C (best stability in the range 0...+40°C);
< 95% RH non-condensing, 0,9...1,1 atm
explosion safe areas;
avoid strong mechanical shock, vibrations or EMI
CE marking
according to 2014/30/EU and EN61326-1 requirements
Relay option
Output relays
2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Default alarm setpoints
determined by user
within 5-95% of the detection range
Other options
Remote probe
protection IP65, default cable length 3.0 m;
max height 80 mm, max diameter 65 mm
Evikon MCI OÜ
Teaduspargi 7/9, Tartu
Tel. +372 733 6310
50411 Estonia
www.evikon.eu
PluraSens
®
VOC Detector-Transmitter
with Photoionization Sensor
E2648-PID
User Manual
