Bacharach H25-IR Specifications download pdf (Page 55)

H25-IR Operation

Instruction 3015-4342 49

5.4.5.1 Top Cover Removal

(See section 5.4.1 Removing the Top Cover)

5.4.5.2 Installing the New IR Optical Bench

1. Carefully remove tubing and electrical connectors from old IR bench. See illustration below.

2. Cut off two cable ties that secure IR bench to chassis, and remove bench from instrument.

3. Place new IR bench inside chassis, positioning its 10-pin electrical connector toward the rear

of the

instrument. Rotate the bench so that its gas inlet and outlet fittings and its electrical connectors are

positioned as shown in the illustration below.

4. Remove protective caps from the gas inlet and outlet fittings of the new IR bench.

5. Connect the 12-conductor ribbon cable from IR SOURCE connector J5 on main board to IR bench

emitter connector (front of instrument).

6. Connect the 10-conductor ribbon cable from DET connector J6 on main board to IR bench detector

connector (rear of instrument).

7. Using the two supplied cable ties, secure the IR bench to the chassis by threading each cable tie

through its cable-tie mount; around the foam insulation that surrounds the IR bench; and around the

12-conductor ribbon cable. Cut off the cable-tie excess.

8. Connect tubing from pump to the IR bench gas inlet fitting, and connect the IR bench gas outlet

fitting to the instrument’s exhaust port as shown below.

5.4.5.3 IR Emitter Adjustment

WARNING! SHOCK HAZARD. When performing the following step, be careful not to come in contact

with AC voltages when working inside the instrument with the cover off and AC voltage applied.

1. Reconnect the AC power cord, and then turn the instrument ON while holding down the front panel

ENT button to enable the Factory menu

2. Wait until the instrument warms up and the Data Display screen appears before proceeding.

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Bacharach H25-IR Specifications Page 55