2008T Troubleshooting Guide
P/N 490292 Rev. A
T- 7.6.4 ‘SLOW FLOW‘ CALIBRATION
NOTE! This calibration requires PATIENCE to avoid error!
a) [TEMP DAC] = 255 and Flow Rate (Figure right) = 100 (ml/min)! The external flow
indicator’s ‘bob’ may look like it is NOT moving! This is NORMAL here!
b) ‘Sharply’ press ‘Enter’. The screen reads “11. Adjust the TEMP DAC…” and [TEMP DAC] turns pale
yellow / white.
c) Press [TEMP DAC]. It turns bright yellow. Initially set it to “210” then ‘sharply’ press ‘Enter’ ONCE!
d) ENSURING [TEMP DAC] is pale yellow / white continue to part e. If (and ONLY if) [TEMP DAC] is
GRAY escape the calibration and unfortunately return to (ABOVE) procedure number T- 7.2.1
(page 323).
e) WITHOUT LOOKING AWAY, simultaneously watch the external meter AND the screen’s [Monitor
Reference] data box for thirteen (13) minutes. TWO (2) possible scenarios:
1) IF (and ONLY if) one OR both exceed 40.0° C even ONCE: This time adjusting [TEMP DAC]
10 lower than it already is and pressing ‘Enter’, repeat parts d and e.
2) IF neither NEVER exceeds 40.0° C: See procedure number T- 7.6.5 (page 330).
T- 7.6.5 CALIBRATE SLOW FLOW TEMPERATURE
The external meter fluctuates SLOWLY, approximately +/- 0.4° C, between a high and a low. WITHOUT
LOOKING AWAY, watch fifteen (15) high to low cycles. TWO (2) possible scenarios:
1) IF (and ONLY if) the high is consistently between 36.9 and 37.1° C! See procedure number
T- 7.6.6 (page 331).
2) IF the high is IS NOT consistently between 36.9 and 37.1° C: See parts a THROUGH c below:
a) Activate [TEMP DAC], it turns bright yellow and adjust its value (+/- 2 = +/- 0.1° C).
b) ‘Sharply’ press ‘Enter’ to return [TEMP DAC] to pale yellow / white. It must NOT turn gray until the
meter consistently cycles to a high of between 36.9 and 37.1° C.
c) Repeat procedure number T- 7.6.5 (page 330).
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