Omega Vehicle Security HH-21 Manual do Utilizador descarregar pdf (Página 20)

SERVICE INFORMATION

WARNING

All service information is intended for qualified electronic

maintenance personnel only.

1. CALIBRATION PROCEDURE

Test Equipment Required:

1. Thermocouple calibrator (Omega CL521, or equivalent).

2. Calibration cable for each thermocouple type handled by unit under test

(U.U.T.):

Type K

Type J

Type T

Ambient Conditions:

Units should be calibrated at an ambient temperature of 23°C ±1°C, with rel-

ative humidity less than 80%. Avoid air currents and heat sources that can

disturb the thermal equilibrium of the U.U.T.

Procedure:

1. Turn OFF U.U.T.

2. Remove rear cover. Refer to Disassembly Instructions.

3. Remove shorting-plug J1 from circuit board. Refer to Mechanical Parts

Diagram for location (P/N CS-791).

4. Replace rear cover. Reinstall battery. Turn on U.U.T.

5. Connect input of U.U.T. to the thermocouple calibrator with a type K

cable. Use input T1 on Models HH-22 and HH-23.

6. Set calibrator output to 32°F, type K.

7. Wait for U.U.T. readout to stabilize, then press HOLD key once, and wait

a few seconds. U.U.T. should read 32.0°F ±0.5°F, type K.

8. Set calibrator to 2500°F, type K.

9. Wait for U.U.T. readout to stabilize, then press HOLD key once, and wait

a few seconds. U.U.T. should read 2500.0°F ±1.0°F, type K.

10. Replace type K cable with Type J.

11. Set calibrator output to 32°F, type J.

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Omega Vehicle Security HH-21 Manual do Utilizador Página 20