CAUTION
TM 5-6630-215-12
Table 2-9. Conductivity Meter, Controls and lndicators
Key
Control or Indicator
Function
1
Meter
Gives direct pointer reading in parts per million (PPM)
in ranges of 0-50, 0-500 and 0-5000 (to 50,000 or
more with the use of RE10 range extension acces-
sory).
2
Cell
Used to hold sample to be tested.
3
Range Extender
Range extender is a small insert which can be pushed
into the sample filled cell cup, and can temporarily
increase the range by 10 times reducing the effective
cell size.
4
Range Selector
A switch used to select the range (PPM) required on
the meter.
5
Pushbutton
When the pushbutton is pushed a built-in electrode
conditioning feature is automatically operated,
which compensates temperatures from 10°- 71°C
(50° - 160°F).
6
Finger/Access Calibration Dial
Used to calibrate the system if the meter reading in
the “S” position does not correspond to the inter-
nal standard value printed on the label.
Do not spill lacquer thinner, acetone, benzene or
chlorinated solvents on case.
Do not try to turn or remove the build-in cell
cup.
Do not dip meter into water.
Do not use with samples hotter than 71° C
(160°F).
Do not attempt service or modification.
(2) To Double the Range (Conductivity Meter) - The master cali-
bration control adjusts all ranges simultaneously and may be used to
temporarily recalibrate any range.
For example, all ranges can be
approximately doubled by adjusting the master calibration control so
that the meter reads one-half the normal value of the internal stan-
dard “S”.
After making this change, be sure to multiply by two the
reading of the water tested.
2-70
