Ametek 5000 Instrument Manual page 83

5. Generously apply a soap solution to all gas connections fittings. Check for leaks and tighten fittings
if necessary. Wipe off excess liquid.
6. Repeat steps 3, 4, and, if necessary, step 5.
7. Re-install the lid.
Valve Operation and Heater Cycling
!
WARNING
Check valve solenoid and heater operation by removing the lid and observing the LEDs.
Oven Temperature Adjustment

NOTE
1. Carefully remove the field unit lid and set it aside.
2. Remove the plug from electronic control board socket J1.
3. Quickly connect a DVM, set to read ohms, between pins P1-1 and -4 (on body of J1) and check for
the resistance specified on the oven thermistor label (also on J1), ±200 ohms.
4. If necessary, adjust R17 one turn for each 1000-ohm (≈1°C) difference between the specified and
actual resistances. (Turn clockwise to decrease resistance.)
5. Remove the DVM and connect the oven plug to J1.
6. Re-install the lid.
7. Apply power to the system and allow it to warm up.
8. If necessary, repeat the procedure until no further adjustment is required to maintain 60°C.
Moisture Generator Temperature Adjustment

NOTE
1. Carefully remove the field unit lid and set it aside.
2. Remove the plug from electronic control board socket J2.
3. Quickly connect a DVM, set to read ohms, between pins P2-2 and -3 and check for the resistance
specified on the moisture generator label, ±200 ohms.
The field unit may contain flammable or toxic process gas. Remove the field unit lid
in a well-ventilated area only after disconnecting power. See other Warnings and
Cautions in Part II: Sample System.
Do this procedure as quickly as practicable to keep cooling from affecting the readings.
Do this procedure as quickly as practicable to keep cooling from affecting the readings.
Troubleshooting and Maintenance 6-17