MODEL 2100-1514 and 2100-1518 CURRENT METER
SUSPENSION WAND OPERATING AND MAINTENANCE INSTRUCTIONS
GENERAL DESCRIPTION
The above part numbered devices consist basically of a 1" diameter aluminum tube 12 feet in length (metric version, 2100-
1518, is 4 meters in length). The tube is marked in feet and tenths or in meters with 5cm graduations. The graduations
begin at the bottom end of the tube. A sliding/locking device (
2100-151-Slider
) positions the Model 2100 Sensor anywhere
along the tube and locks the sensor firmly in place while taking measurements. The tube breaks down by means of
threaded fittings into four equal-length sections. The Sensor/Cable assembly (
2100-A22
) slips easily in and out of the
SLIDER for transporting and storing the sensor wand. The sensor wand fits into a PVC tube supplied for transportation
and storage.
INSTRUCTIONS FOR USE
1.
Place
SLIDER
onto a section of the tube orienting the sensor cable slot toward the top of the rod.
2.
Thread the tube sections together as required for the desired depth measurements. (NOTE: Plastic "thread
protectors" are installed when the wand is shipped and must be removed before wand assembly can take place.
Keep the thread protectors for later use when the wand is taken apart for transport and storage.
3.
Thread the
TOP CAP
onto the top section of the assembled wand. It will fit any section. The
TOP CAP
contains
the directional pointer in a stored position (it also has spare 6-32 set screws and an allen wrench for use with the
set screws). Grasp the knurl on the stored pointer and unscrew it from the
TOP CAP
then thread it into the
horizontal "pointing position" in one of the two threaded holes provided.
4.
The
SLIDER
is locked into position on the rod by use of the knurled nut located at the back of the slider. Do not
tighten the nut excessively as it is not necessary for keeping the slider in position. The 10-32 screw located in the
center of the locking nut may be used to attach a flow direction "streamer" if desired. Orient the slider in the same
direction as the Top Cap pointer if the sensor will be in depths where you cannot see the propeller.
5.
Insert the Model 2100 Sensor (2100-A22) in the Slider and lock it into place with the set screw.
BE SURE THAT
THE SENSOR BODY IS PROPERLY ORIENTED SO THAT THE SET SCREW FITS ONLY INTO THE RECESS
PROVIDED FOR IT.
Tightening the set screw on the sensor body in a place other than in the recess may damage
the sensor or the cable.
6.
After the Rotor (2100-A21) has been installed on the sensor body, loosen the
SLIDER
lock nut and point the
propeller in the same direction as the pointer at the top of the wand. Move the slider to the desired measuring
depth and tighten the lock nut.
7.
Attach the
FOOT
to the bottom section of the wand by means of the
¼
-28 stainless steel bolt. The
FOOT
has a
hole in it (off center) which is designed for attaching a steadying lanyard when high flow rates make handling
difficult.
TAKING READINGS
1.
Connect the 2100 Indicator to the Sensor by use of the twist-lock connector. Rotate selector switch to the
COUNT
position and spin propeller. Confirm that the display counts up sensor pulses (four per revolution) and that the
propeller rotates very freely.
2.
Rotate the Indicator Selector Switch to the velocity averaging position desired (Min, -, Max).
3.
Place the sensor wand in the stream orienting the propeller into the flow.
