Detcon 971-071170-0DL - Manual (Page 6)

Model 971-071170-0DL
2.2 Sampling connections
1. Install a length of tubing from the desired sample point to the sample port as shown in.
Sample draw tubing should be either Teflon or stainless steel 1/4" OD. Sample flow rates are
set between 500 and 1000 ml/m.
Note:
When detecting for NH3, CL2, CLO2, or HCL care must be taken to use a minimum amount of
stainless steel tubing and connections because stainless steel readily absorbs these gasses and will
cause significant error in the detection process. Teflon tubing is recommended for these applications.
detcon, inc.
HOUSTON,TEXAS
SAMPLE DRAW
GAS DETECTION SYSTEM
CAL PORT
SET
AIR
FLOW
SET
SAMPLE
FLOW
SAMPLE
PORT
Sample
Port
0
50
100
150
200
250
0
0.4
0.8
1.2
1.6
2.0
1.0
0.2
0.6
1.4
1.8
Figure 2 Dilution Flowmeter Bracket
2. Install a length of tubing from the vent port and an area deemed safe for vent as shown below.
VOC Sensor
MODEL
PI-700
PGM1
ZERO
PGM2
SPAN
Vent Port
VOC Sensor
MODEL
PI-700
PGM1
ZERO
PGM2
SPAN
Figure 3 Sensor assembly vent port
971-071170-0DL Instruction Manual Rev. 0.0 Page 2 of 8