Pot 24 with 8 variable potentials, each controlling a group of 3 channels
Long term testing at fixed potentials is vital in many branches of corrosion, coatings, cathodic protection and electrochemistry. The Pot 16 offers 16 individual potentiostats (number of channels can be determined by your needs). Each channel has a fixed current measurement range, selected on purchase for the type of testing to be performed. The standard range is 350mA with a resolution of 5µA.
Output potential can either be fixed, selected by a switch, or variable via a 10-turn dialled knob. Extra optional potential selectors may be added and channels grouped. Typical configurations would be all channels set by a two position switch selecting 1.5V or 3.5V, or channels 1-8 set from -5V to +5V via a 10 turn dialled knob and channels 9-16 set by their own dialled knob. Most standard Cathodic Disbondment tests (e.g. ISO15711, or ASTM G8, G42, G80, G95 or CSA Z-245) require 1.05V, 1.5V, 3V or 3.5V; however a galvanostat option can be added for the 3mA Australian and New Zealand standards (AS-3862, AS/NZS4352). Please specify which standards you require when quoting. We will ensure your Pot 16 complies.
A single dialled knob is fitted as standard, to allow a wide range of potentials to be selected for all channels. Additional dialled knobs may be specified to allow different potentials on groups of channels. In some cases a variable potential is not desirable, in which case, switches may be specified to allow selection between fixed potentials e.g. -1.5V & -3.5V.
Alternatively up to 4 fixed potentials may be ordered and allocated between the 16 channels at no extra cost. For example channels 1 to 8 could be set to -1.5V, channels 9 to 11 set to -3V, channel 12 to 14 set to -3.5V and 15 to 16 set at -4V. These potentials are set on internal 25 turn trimming potentiometers.
To increase the value of these tests both current and voltage are monitored and stored using very high accuracy internal voltmeters. The voltage should stay constant at the set potential but if this is not the case it is usually an indication of problems with the cell (for example a bubble in the Luggin probe).
The Pot 16 can easily be customised to the customers specifications. Higher current output, more channels, less channels, waterproof enclosure, alternative connectors and battery powered option are all possible. The Pot 16 is infinitely variable. It is designed to accommodate the needs and specifications of the end user.
Standards:
- ASTM G8, G42, G80, G95 and their variants
- AWWA C-210, API RP 5L7
- CSA Z-245.20-02 and Z245.21-02
- BS EN10289 : 2000(E)
- ISO15711 Method A & B
- ISO-21809-2 and ISO-21809-3
- NACE RP0394
- Shell DEP 31.40.30.31-Gen and Shell DEP 31.40.30.32-Gen
- DIN 30 671 (1987)
- NF A49-711, NF A49-716
- 09-SAMSS-089 ARAMCO
- GBE/CW6:Part 1 and BGC-PS-CW6:Part 1
- ARCO China
- AS-3862, AS/NZS4352:1995 Method A & B. (Pot 16 with Galvanostat option or Gal 16 Only)
