P 1000, 2000, 3000 & 5000 Ex
Ion Science Ltd
Page 40 of 41
Technical Specifications
Expected lifetime of parts
Batteries
On the condition of normal use battery capacity will be reduced to approximately 70% after 250 full
battery cycles or 1 year (whichever comes first).
New fully charged (rechargeable) batteries at 20
C > 10 hours normal use.
Affects on battery capacity:
10% less per 10
C drop in temperature.
As the batteries age they may self discharge to half capacity from fully charged state.
At
25
C – 50 days
37
C – 25 days
48
C – 5 days
60
C – 1 day
The back light will consume an additional 50% power and significantly reduce the instrument „on
time‟.
Filter
The filter should be changed every 100 hours of use. This frequency should be increased for dusty or
moisture laden environments.
PID Lamps
10.6 eV and 8.4 eV expected life of 3 years and 11.7 eV 1 month. Lamps are very fragile; please
handle with care at all times, never touch the window and do not drop! Lamp cleaning for normal use
is every 100 hours of use (based on 30 ppm for 100 hours). Reduce this if used in heavily gas
contaminated environments. Please note that some esters, amines and halogenated compounds may
accelerate window fouling; cleaning may be required for every 20 hours of use. Cleaning frequency
will also depend upon alarm levels set and prevailing environmental conditions.
PID Cell
Electronic cell has an indefinite life however it may suffer contamination problems – it is essential that
a clean filter is attached during use. Some gases such as methylene chloride in high concentrations
may condense onto the walls of the cell. In these cases the instrument should be returned to an
Authorised Service Centre for thorough cleaning.
NB: PID specifications relate to an isobutylene 100 ppm in air calibration at 20
C and 90% RH.
