Teledyne 514 - NDIR analyzer - Manual (Page 49)

5–11
Maintenance & Troubleshooting 5.0
Teledyne Analytical Instruments
A Business Unit of Teledyne Electronic Technologies
14. The log amplifier integrated circuit (A1) is now balanced.
15. Remove the 20K resistor, the jumper, restore connections,
replace ICs, then turn on the instrument power and check control
loop by measuring voltage at the output of A2. Voltage should be
-3 VDC, nominal.
16. If voltage is positive, R11 is out of balance or a component in the
loop has failed.
Photometric Laboratory Adjustment Procedure
Before power is supplied to the analyzer, all modules should be opened
and inspected for damage or loose components also check unit for proper
wiring and connections. All plug in circuit cards should be removed and
checked individually for correct assembly.
Analysis Unit
Explosion-Proof Version, Control Unit: Input power connections for
this unit are at TS2 pins: 12 (ground), 13 (neutral) 14 (line) (see dwg. B-
16571). The input resistance between line and neutral with ON/OFF switch
in the ON position should be 4 ohms +10%. The resistance between ground-
hot and ground-neutral should be infinite resistance.
General Purpose Version, Control Unit: Control unit input
power connections are to be found at TS2 pins: 14 (line), 15 (neutral), 16
(ground) (see dwg. C-15245). The input resistance between line and neutral
with ON/OFF switch in the ON position should be infinite resistance
General Purpose Version, Power Module: Power Module input
power connections are at TS1 pins: -1 (line), -2 (neutral), -3 (ground) (see
dwg. C-15245). The input resistance between line and neutral with ON/OFF
switch in the ON position should be 5 ohms +10%. The resistance between
ground-line and ground-neutral should be infinite resistance. At this point all
interconnections between the control unit and power module should be
made. The interconnections are as follows: Connect the input AC power to
TS2: -14 (line), -15 (neutral), -16 (ground).
Next, a power line connection should be installed between the control
unit switch AC power in TS1: -14 (line), -15 (neutral), -16 (ground) and the
power module AC power in TS1: -1 (line), -2 (neutral), -3 (ground). Signal