Teledyne 6000A - Photometric analyzer - Manual (Page 89)

Photometric Analyzer Maintenance 3
Part II 3-9 Teledyne Analytical Instruments
SIG GND: Signal Ground. Ground reference for both the measure and the
reference signal.
MEAS: Measure Signal voltage.
REF: Reference Signal voltage.
The third terminal strip has eight contacts labeled -230 VDC, +15 VDC, -15
VDC, COM, SPAN FLTR, SPAN SOL, ZERO FLTR, ZERO SOL. This
strip feeds the high voltage needed on the cathode of the photodetector, DC
power for the photodetector preamplifier, and control signals for the sole-
noids and filters. The labels stand for:
-230 VDC: This is the negative high voltage fed to the photodetector
cathode, about -230 VDC.
+15 VDC: Power Supply voltage fed to the photodetector preamplifier,
+15 VDC.
-15 VDC: Power Supply voltage fed to the photodetector preamplifier,
-15 VDC.
COM: Common reference to the +/- 15 VDC and the -230 VDC power
supplies.
SPAN FLTR: Span filter signal, AC voltage.
SPAN SOL: Span solenoid signal, AC voltage.
ZERO FLTR: Zero filter signal, AC voltage.
ZERO SOL: Zero solenoid signal, AC voltage.