Turner Designs TD-700, Operating Manual, Page: 37 / 55

TD-700 Laboratory Fluorometer Operating Manual
Page 36
APPENDIX 3
Alarms and Diagnostics
A. Alarm Screen
There are alarms built into the TD-700 to warn of an internal instrument
malfunction or low power.
Table 1. Alarms
Alarm Delay Alarm Condition Normal
High Voltage (HV Bad) 3 min. >1000 or <25 V 150 to 850
Low Power (Low PWR) 1 min. <40% 100%
An alarm will be activated if the abnormal condition is in effect for a
specified delay period. If an alarm is activated, “ALM” will blink on the
HOME screen.
To see what alarm is active, from the home screen press <ESC>. For
example, if the high voltage (HV) is outside the specified range you will see
"HV Bad". If the HV alarm is triggered (HV Bad is seen when <ESC> is
pressed from the HOME screen), contact Turner Designs.
If the low power alarm is triggered, check the power at the source and the
power supply.
Refer to the Diagnostic Screens (next section) for definitions.
B. Diagnostic Screens
There are diagnostic screens which show the status of internal fluorometer
functions. To access these screens, from the HOME screen, press <8>,
then <ENT> to see the next screen in the sequence.
Definitions:
Sen % . Sen % is also referred to as Sens Factor in the software and
Sensitivity Level on the printout. All three terms indicate the fluorometer's
sensitivity on a scale of 1 to 100. The Sen % is directly proportional to the
voltage on the photomultiplier tube. The higher the number, the greater the
photomultiplier tube voltage, the greater the sensitivity (and typically, the
greater the "noise") of the readings.
ALM XXX ppm
<ENT> -Setup & Cal
HV Bad
Sen %: XX
Raw:
XXX
Oper: XXX Hrs
Power level: 100%