TM8400B-L-00
1 November 2004
The additional equipment required for calibration is:
- .01% precision decade resistance box
- IAPSO Approved Standard Seawater.
CAUTION
This procedure should only be attempted by qualified electronic personnel.
WARNING: SHOCK HAZARD
Line voltage is present on front, back and top panels when Autosal is connected to line, even
when NOT turned on.
11.4.1. POWER SUPPLY CALIBRATION
Step 1. Check the line voltage select switch is in the proper position. Check the
line fuse (installed and correct value), plug into power outlet.
Step 2. Ensure that heater and power supply PCB (18962) is installed and all other
PCB's are disconnected.
Step 3. Turn the power on and check that the thermoelectric cooling fan, the back
panel fan and the tank stirrer operate.
Step 4. Turn the pumps on and check that they both operate, turn off pumps and
power.
Step 5. Connect scope to TP1. Ground to TP3. The reading should be approx. 15
V DC with less than ±200 mV.
Step 6. Connect scope to TP2. The reading should be approx. -15 V DC ±200 mV.
Step 7. Connect scope to TP4. Ground to TP5. The reading should be approx. 5 V
DC ±200 mV.
Step 8. Check that with the temp set switch at 18°C BOTH heater lamps go dark.
Step 9. Check that with the temp set switch at 33°C BOTH heater lamps light.
*Providing tank temperature is greater than 18°C when measure taken and
less than 33°C.
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