Bacharach H25-IR Specifications download pdf (Page 56)

Parts &Service H25-IR

50 Instruction 3015-4342

3. Press the ENT and ESC buttons simultaneously to access the Main menu. From the Main menu,

select DIAGNOSTICS > IR EMITTER to display the IR Emitter Parameters screen.

4. Adjust potentiometer R37 located on the main board for an IR Emitter reading of 800 ±20 or 450

±20 mW, corresponding to the user’s version of part as seen in the items required section

containing the part numbers.

5.4.5.4 DIGIPOT Adjustment

1. Press ESC twice to return to the Main menu. From the Main menu, select FACTORY > DIGIPOT to

display the DIGIPOT screen.

IMPORTANT! When performing the following Step, the instrument must be sampling fresh air

(zero gas) when adjusting the DIGIPOT value.

2. Use the Up and Down buttons to adjust the DIGIPOT value until the IR VOLT reading is

4.2000 ±0.0500 volts. Press ENT to save the new DIGIPOT value.

IMPORTANT! If adjusting the DIGIPOT does not reach 4.2000 ±0.0500 volts then return to stepn 18 to

lower the IR Emitter setting. IF the IR Emitter setting is 450 ±20 mW adjust the IR

Emitter setting to 375 ±20 mW. Next, repeat the DIGIPOT adjustment.

3. Turn OFF instrument and remove AC power cord.

4. Reassemble instrument.

5.4.5.5 Factory Calibration

NOTE: Factory calibration establishes the instrument’s default calibration setting that is recalled when

“RESTORE FACTORY CAL” is selected from the CAL DATA menu.

1. With all covers in place, turn the instrument back ON while holding down the front panel ENT button to

enable the Factory menu.

IMPORTANT: Before calibrating, allow the instrument to warm up for at least 15 minutes.

2. Perform an internal calibration as described in the H25-IR instruction manual, 3015-4342.

IR EMITTER PARAMETERS

VOLTS=5.7345 mA=77.5

OHMS=75.0 mW=450.0

DIGIPOT=220

IR VOLT=4.2000

NOTE:

Readings for the other

parameters on this screen may vary.

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Bacharach H25-IR Specifications Page 56