4 Adjustments
Service Manual – Osmetech OPTI™ Analyzer
4-3
Open the analyzer lower housing by removing seven screws on the bottom of
the analyzer. Set the analyzer upper housing on its side to access the keypad.
Turn the analyzer power on. After completion of the adjustments, turn off
the analyzer power before reassembly of the analyzer. Once reassembly is
completed, turn the analyzer power on to resume normal operation.
Barometric Pressure
The operator through keyboard entry in the Setup mode may adjust
barometric pressure. The displayed pressure may be adjusted
±
50 mmHg
through keyboard entry. Use the following procedure if barometric pressure
requires adjustment beyond the span of the keyboard entry.
Using the analyzer keypad, select the Diagnostics Menu and then the
barometer test to enable the barometric pressure. Locate R67 and adjust for
the correct barometric pressure on the analyzer display.
Sample Measurement Chamber Temperature
Note: Prior to performing temperature adjustment turn on the analyzer
power and allow a 10-minute warm-up to ensure temperature
stability.
Using the analyzer keypad, select the Diagnostics Menu and then the
temperature test to enable the display of analyzer temperature.
Locate R126 and adjust for a display of 37.00
±
. 0.03
°
C for temperature T1.
After adjustment of R126 allow 5 minutes for temperature to stabilize.
Locate R124 and adjust for a display of 37.15
±
. 0.03
°
C for temperature T2.
Note: Always adjust temperature T1 before adjusting T2 as temperature T2
depends on temperature T1. R124 adjusts the difference between T1
and T2 which must be 0.15
°
C.
