ANALOX SA1 W75 SR 60 N 564, User Manual

Page: 11 / 25

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref : AS2-802-14 - January 2016
Page 9
6 Calibration
Factory Calibration is required at least once every 12 months to replace the electrochemical
oxygen sensor.
6.1 Readout check
It is recommended that a readout check is performed on a routine basis as part of emergency
equipment checks and drills.
The readout check can either be performed using certified test gases or in a verified
atmosphere. The SUB MkIIP should be turned on and allowed to warm up (at least 40
seconds) before readings are taken. Test gases should be piped as described in Section 6.2.
Atmospheric measurements should be made in an atmosphere whose constituents have
been measured by verified O
2
, CO
2
and pressure sensors (e.g. CAMS).
Once the readings on the SUB MkIIP have settled, take readings for O
2
, CO
2
and pressure. If
using certified test gases, the readings should be within the tolerances in the center column of
the table below. When the SUB MkIIP is being verified against a CAMS verified atmosphere,
use the right hand column as a guideline to the acceptable tolerance. Also ensure that the
SUB MkIIP is sampling the atmosphere from the same compartment as the CAMS.
To convert the CAMS Gas reading from units of Torr to %SEV, use the following formula:
%SEV in Reading Equivalent CAMS
750
100 Torr in Reading Gas CAMS


To convert the CAMS Pressure reading from units of Torr to FSW, use the following formula:
FSW in Reading Equivalent CAMS 32.8 -
750
32.8 Torr in Reading Pressure CAMS








Parameter SUB MkIIP specification
(to be used with certified test gas)
SUB MkIIP vs. CAMS Allowable
Tolerance
(to be used at 700 to 900Torr
compartment pressure and 50 to 90°F)
Oxygen (O
2
) An accuracy of ±1% for SUB MkIIP reading
over a 0 to 200%SEV range and ±2 display
counts;
(SUB MkIIP Reading)(0.01)+0.2 = (± _%SEV*) ± 0.74%SEV*
Carbon
Dioxide (CO
2
)
An accuracy of ±5% of a 10%SEV CO2 range
for readings 0 to 4.99%SEV and ±2 display
counts; (±0.52%SEV*).
An accuracy of ±10% of a 10%SEV CO2 range
for readings 5 to 10%SEV and ±2 display
counts; (±1.02%SEV*). ± 0.52%SEV*
Pressure ±0.15% of 300FSW range and ±2 display
counts; (±0.7 FSW*) at STP.
±0.5% of 300FSW range and ±2 display
counts; (±1.7 FSW*) otherwise. ±1.75 FSW*
*
Applicable Readout Tolerance
If the readings are outside these tolerances the SUB MkIIP requires calibration.