9
90' (27.5 m) vertically, at about 3' (0.9 m) per second flow rate. Note that at 200’ the PID response
will be delayed by about 1 minute, the time required for the gas sample to reach the instrument.
IMPORTANT!
During operation, make sure the probe inlet and the gas outlet are free of obstructions. Obstructions
can cause premature wear on the pump, false readings, or pump stalling.
Pump Status
During normal operation, the pump icon alternately shows inflow and outflow. If
there is a pump failure or obstruction, the alarm sounds and the pump stall icon
blinks on and off. If this occurs, clear the obstruction and press the Right key to
restart the pump.
External Water-trap Filter
The external filter is made of a PTFE (Teflon
) or PVDF membrane with 0.45 micron pore size to
prevent dust or other particles from being sucked into the sensor manifold, which could damage the
instrument. It prolongs the operating life of the sensor and pump. To install the external filter,
simply screw it in to the instrument’s inlet probe using the Luer connection.
Alarm Signals
During each measurement period, the gas concentration is compared with the programmed alarm
limits (gas concentration alarm limit settings). If the concentration exceeds any of the preset limits,
the loud buzzer and red flashing LED are activated immediately to warn of the alarm condition.
In addition, the instrument alarms if one of the following conditions occurs: battery voltage falls
below a preset voltage level, failure of the UV lamp, or pump stall.
Alarm Signal Summary
Message
Condition
Alarm Signal
HIGH
Gas exceeds ‘High Alarm’ limit
3 beeps/flashes per second
OVR
Gas exceeds measurement range
3 beeps/flashes per second
MAX
Gas exceeds electronics’ max range
3 beeps/flashes per second
LOW
Gas exceeds ‘Low Alarm’ limit
2 beeps/flashes per second
TWA
Gas exceeds ‘TWA Alarm’ limit
1 Beep/flash per second
STEL
Gas exceeds ‘STEL Alarm’ limit
1 Beep/flash per second
Remove Tube
STEL measurement completed
1 Beep/flash per second
Pump icon flashes Pump failure
3 beeps/flashes per second
Lamp
PID lamp failure
3 beeps/flashes per second
plus ‘Lamp’ message
Battery icon
flashes
Low battery
1 flash, 1 beep per minute plus
battery icon flashes
CAL
Calibration failed, or is overdue
1 beep/flash per second
NEG
Gas reading measures less than
number stored in calibration
1 beep/flash per second
