PN 10795T 21
To enter into the configuration mode:
A. Press the MODE button. A menu cycle of J, W, CAL, tO and cd will begin.
B. Press the ON/SELECT button when “CAL” appears. A menu cycle of tCon, SPd and Attn will
begin.
C. Press the ON/SELECT button when “tCon” appears. The current time constant value will be
displayed and the “SET CAL” annunciator will flash. The time constant is a measure of the length
of time the calorimeter takes to respond to a laser beam.
Use the RANGE (count up) button to increase the value or the MODE (count down) to decrease
the value. Enter the time constant value listed on the serial tag of your calorimeter or interface
module for large aperture calorimeters.
D. Press the ON/SELECT button. The time constant is now active and the power meter will return
to the last operational state.
E. Press the MODE button to return to the menu in step A.
F. Press the ON/SELECT button when “CAL” appears. A menu cycle of tCon, SPd and Attn will
begin.
G. Press the ON/SELECT button when “SPd” appears. The current speed up value will be displayed
and the “SET CAL” annunciator will flash. The speed up setting allows you to control the power
meter’s display rate. The best value will cause a slight overshoot then a quick settling on the final
value. Too high of a setting will cause the display to overshoot then slowly drift back down to the
final value. A slow setting will cause the display to slowly count up to the final value.
Use the RANGE (count up) button to increase the value or the MODE (count down) to decrease
the value. Enter the appropriate speed value from the following table.
AC2500 103.0
AC2501, AC25HD, ACX2501, AC25UV, AC2504, AC25FX, ACX25HD, ACX25FX 136.0
AC5000 100.0
AC5001, AC50HD, ACX5001, AC50UV, AC5004, AC50FX, ACX50HD, ACX50FX 120.0
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