Heath Consultants Detecto-Pak 4 (DP) User Manual

Page 31

CALIBRATION

100786-0 Rev. D

05/09

B. CALIBRATION PROCEDURES (Figure 6)

**NOTE**

A calibration kit & calibration cylinders are available to calibrate the

Detecto-Pak 4. Any other method will not insure proper calibration levels.

Allow instrument to warm up 15 minutes prior to calibration.

1. Start with the Detecto-Pak 4 in operation as described under

“OPERATING PROCEDURES.” (See Chapter Five, Section V, B)

2. Set the instrument on a flat, horizontal surface. The instrument must

remain in this position throughout the calibration procedure. On

power-up, the fine zero position is automatically set to mid range

electronically. If any fine zero adjustments are made after power-up,

they will be reset when the instrument is powered off.

3. Put the instrument in the 10 ppm range. The meter needle should be

set to zero. If the needle is not on zero, you will need to reset the

instrument with coarse zero (RP8) port.

4. If an adjustment is necessary to bring the meter needle to zero on the

10 ppm meter scale, an adjusting control is inside the bottom rear

of the instrument as indicated in Figures 7 & 8. Access the ZERO

adjustment through the RIGHT-HAND ACCESS PORT on the rear

of the instrument located directly below the fuel cylinder holder.

5. Remove the plug from the port and use a micro-screwdriver to adjust

the ZERO level using RP8 as required.

6. Put the instrument in the 100 ppm range. There should be no

significant drift or movement of the meter needle. The needle should

remain relatively stable on zero.

**NOTE**

Calibration must be conducted in a hydrocarbon-free (clean air)

atmosphere.