


After opening the monitor case, make sure that the parts in the case are complete according to
the following table. If anything is missing, please contact our company.
PMD 331 PARTICLE COUNTER User Manual
RS-485

485
485

485
32G
485

IMPORTANT
To avoid laser tip damage or air pump block,
please do not use this monitor to detect heavy
smoke, high-concentration oil mist, or high-
pressure gas!
IMPORTANT
To avoid laser tip damage or air pump block,
please do not use this monitor to detect heavy
smoke, high-concentration oil mist, or high-
pressure gas!




BackLight:
Backlight Adjustment
Auto Off

d
180
180
180





RS-485
RS-485
4.1 RS-485 Serial Communication
0x00~0x01,0x08~0x10,0x19~0x1E.


0x01
0x24 0x10 0x00 0xFE 0xFB
0x00 0x9A
0xF0
0x00
0x5B 0x5C
0x01
0xF2
0x00 0x16
0x11
0x6B

03
03
03
03
0DC5
0x0D 0xC5
0x01
0x0D 0xC5
0x01
0x01
0xCC
0x05
0xCC
0x05
0xDDC4
0xCC05
high byte.
stop

0xC1
0xBE
0xD5
0xC6
0x3D
0x3D
0xC6
0xC6
0xC1BE
high byte.

Note: The filter is connected to the pagoda at the upper end. Do not touch
the thread, otherwise the zero calibration will be affected.



RS-485
8


V2.2
Made in China
Elitech Technology, Inc
2528 Qume Dr, Ste 2
San Jose, CA 95131 USA
Tel: (+1) 408-898-2866
Facebook: www.facebook.com/temtopus
Instagram: www.instagram.com/temtopaqm/
youtube: www.youtube.com/@Temtopus
linkedin: www.linkedin.com/company/temtop-us/
X: x.com/temtopus48285
Sales: [email protected]
Website: www.temtopus.com
Elitech Brazil Ltda
R.Dona Rosalina,90-Lgara, Canoas-RS
92410-695,Brazil
Tel: (+55)51-3939-8634
Sales: [email protected]
Website: www.elitechbrasil.com.br
Elitech (UK) Limited
Unit 13 Greenwich Business Park,
53 Norman Road,London, SE10 9QF
Tel: (+44)208-858-1888
Youtube: @elitech_uk
Instagram:@elitechuk_
Facebook: @hvaccontrol
Sales:[email protected]
Website: www.temtop.co.uk
Temtop (Shanghai) Technology Co., Ltd
Room 555 Pudong Avenue,
Pudong New Area, Shanghai,China
Tel: (+86)400-996-0916
Email:[email protected]
Website:www.temtopus.com
