Teledyne 3000TA - General purpose trace oxygen analyzer - Manual (Page 54)

4 Operation Model 3000TA
4-22 Teledyne Analytical Instruments
Range Voltage (V) Current (mA)
LO 0.25 8
MED 0.50 12
HI 0.75 16
CAL (0-25%) 1.00 20
IMPORTANT: In the event of loss of flow through the analyzer, if the vent
is vented to a location of high oxygen content, oxygen will
back diffuse through the vent line and in most cases quickly
saturate the cell with oxygen which can then require a quite
long purge down time for the sensor when then exposed to
low oxygen concentrations. In the event that flow is to be
interrupted into the analyzer, it is suggested that the user do
one of the following:
1. Bag the sensor in nitrogen during this time
2. Install a shut off valve on the vent port of the ana-
lyzer or somewhere within the users sample system.