ISO 9001 ed 2000
Certificato n° 229 M.M.T. srl 26010 CAPRALBA (CR) - ITALY - Via degli Artigiani 56 tel. +39 0373 450595
www.mmtitalia.com e-mail: info@mmtitalia.com fax. +39 0373 450728
395_E_man Rev. 1 del 14.03.2005
pag. 1/4
INSTRUCTION MANUAL - English
Ceramic single electrode-holder - series 395
Code: 395-000-00 and 395-001-00
Thank you for purchasing ceramic single electrode-holder series 395.
Before using the device, please read carefully this manual, and keep it in a safe place, for future
use.
1 - Description
The electrode-holder series 395 allows ON/OFF monitoring of level for conductive liquid.
They are particularly useful in boilers and steam generators.
The level switches to be used together with the electrode-holder series 395, are all of our
products of the series 200 and 201 (delayed).
The electrode is in stainless steel; the isolation is in ceramics (Al2O3).
2 - Technical characteristics
- thread: 3/8" or 1/2" gas
- protection grade: IP40
- electrode diameter: 6 mm
- electrode length: 1000 mm (optional)
- maximum temperature at the electrode: 250 °C
- maximum pressure: 25 bar
- weight: 100 g
3 – Mechanical dimension
Fig.1
ISO 9001 ed 2000
Certificato n° 229 M.M.T. srl 26010 CAPRALBA (CR) - ITALY - Via degli Artigiani 56 tel. +39 0373 450595
www.mmtitalia.com e-mail: info@mmtitalia.com fax. +39 0373 450728
395_E_man Rev. 1 del 14.03.2005
pag. 2/4
4 - Installation and use
For a correct installation follows the 3 following phases:
- determination of the electrode length
- fixing the electrode-holder on the boiler
- electric connection
4.1 The boiler has to be depressurize and vented to atmosphere, before the installation of the
electrode-holder.
Every operation on the electrode-holder must be performed only by qualified staff and always
with boiler depressurize and cold.
4.2 Determination of the length of the electrode
First of all, it is necessary d
ecide the electrode length, according to the desired water level, keeping in mind thread and
junction length.
The switching point is at the lower end of the electrode.
Once the length is decided, proceeds to the electrode cut.
The electrode must be mechanically assembled to the electrode-holder as in the following
drawing:
Fig.2
First, lock the electrode to the cylinder; then grip the cylinder with pliers, and tighten the
electrode with others pliers.
Then lock the nut to the cylinder: grip the cylinder with pliers, then tighten the nut with a
wrench.
Don't rotate absolutely the threaded electrode and the electrode in the electrode-holder.
4.3 Installing of the electrode-holder
The electrode-holder series 395 must be vertically assembled on the boiler, through a threaded
3/8" or ½” hole.
