TPI 777, Manual

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RANGE ACCURACY
SENSOR SPECIFICATIONS
TYPE RESOLUTION
CO 1ppm
Temp 0.1 ⁰
0-999 +/- 5ppm or 5% of rdg whichever is greater
32 to 104⁰F +/- (2⁰F + 5 digits)
0 to 40⁰C +/- (1⁰C + 5 digits)
ALARMS
The 777 has two types of alarm. Low Alarm activates at two second
intervals. The High Alarm activates at one second intervals.
The sound, LEDs and vibration activate during an alarm. The alarm settings
can be changed in set-up of the 777. The 777 is preset for the most common
levels required. The preset alarm levels are shown below.
PRESET ALARM LEVELS
Type Low High TWA STEL
CO 50 200 50 75
See page 6 for Alarm Adjustment instructions
FUNCTION (BUMP) TEST
Turn the instrument on and wait until the warm up period is over and the main
display is shown. Apply 100ppm of CO gas to the sensor area at a flow rate of
200-400 cc/min. The alarm should activate within approximately 20 seconds.
This test can be performed to ensure proper function prior to each day's
use. Failure to pass could indicate a failure or need for calibration.
SWITCHING BETWEEN ⁰F and ⁰C
With the 777 on press and release the On/Off key to switch between ⁰F and
⁰C.
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