In-Situ Flow Cell for Low-Flow System with RDO Sensor (purchased before 09/2008) - Manual (Page 2)

Multi-Parameter Water Quality TROLL ®
A. REMOVE THE RDO SENSOR FROM THE
EXISTING ADAPTER PLATE
The RDO sensor is shipped assembled in an adapter plate (or
"clamp") suitable for monitoring in groundwater and surface
water sites (shown in photo below left). To use the RDO
sensor with the flow cell, remove it from that adapter plate and
install it in the sealing adapter plate specifically designed for
the flow cell (shown below right).
Follow the steps below to remove the RDO sensor from its
original adapter plate:
1. Pull the RDO cable and harness through the hole until it is
on the side of the adapter plate opposite the sensor.
RDO FLOW CELL
Catalog No. 0057600
page 2 of 4
2. Firmly pull the RDO sensor out of the adapter plate. With
sufficient force, it will "pop" out.
3. Set this adapter plate aside. The flow cell adapter plate
may be used in all RDO applications.
B. INSTALL THE RDO SENSOR IN THE FLOW
CELL ADAPTER PLATE
1. To insure a good seal, replace the o-rings on the RDO
sensor: Remove the old o-rings, lubricate the new o-rings
(the larger ones) and install on the "foot" of the sensor. If
the o-rings on the plug-in cable harness appear worn,
replace them also.
2. Remove top of flow cell (RDO adapter plate). Unscrew
and remove the nut from the cable grip. Using the RDO
cable harness as a tool, push the gray split seal out of the
cable grip.
TIP: If the RDO sensor is currently assembled to the MP
TROLL 9500, do this first:
• Unplug the RDO adapter cable from the TROLL's sensor block
• Loosen the Phillips head screw on the adapter plate
• Separate the MP TROLL from the RDO sensor assembly
RDO cable Cable harness
Remove nut and split seal
from cable grip
Left: RDO adapter plate
with RDO sensor installed
(as shipped) Right: RDO adapter
plate designed for
flow cell
Cable grip
Slide lubricated o-rings over
RDO cable harness and into
grooves on RDO sensor
sensor
o-rings
cable harness o-rings