SITE INFORMATION AND CORRESPONDENCE

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1LV SNIFFER battery Check Turn MODE selector knob from OFF position to BATT TEST position . The miter pointer should come to rest in the BATTERY GOOD range of the scale. Setting Meter Pointer To Zero 1 . Attach the air sampling probe connector to the instrument intake on the left side of the case by pulling bacK the spring collar of the connector and pressing the connector over the intake. 2. Place the instrument in the position in which the meter indication will be read . NOTE : Heat distribution from active and reference f1lla- ments of the detector sensor changes from vertical to horizontal position . The resulting change in electrical balance between elements causes a shift in pointer zero from one position to the other. 3. Set MUDE SELECTOR switch to FPM x 100 and operate the instrument for 10 minutes to allow the circuits to stabil- ize . 4. In fresh air; set the ZERO ADJUST knob at the midpoint (five fall turns from either extreme position) . 5. Turn the course ad.;ustrtient screw to move the meter pointer to zero on the meter scale, 6. Turn the tu]UE SELECTOR switch to the PPM x, 10 position and turn the ZERO ADJUST knob to set the pointer to zero. 7. Turn the MOUE SELECTOR switch to the PPM x 1 position and turn the ZERO ADJUST knob to set the pointer to zero, Operation 1 . Turn the MOUE SELECTOR control knob to BATT TEST position and read the condition of Vie battery on the meter dial . Recharge batteries if necessary . NOTE: Do not recharge unless the battery is almost completely discharged . 2. Turn the MODE SELECTOR control to the desired operating rang*. 3. Allow a ten minute warmup period with the instrument in Sume position (orientation ) as it is to be used in service . 4 . Read and record the results.