User Manual

3332
The reading will be converted to mA by the following formula:
mA = K (measured value x 16/2000) + 4
K = conversion factor depending on the model
Model Conversion factor K
HI 8936 A/AL 10
HI 8936 B/BL 100
HI 8936 C/CL 1
HI 8936 D/DL 10
For example, using an HI 8936A, if the measured value is 123.4
mS, then
output current = 10 x (123.4 x 16/2000)+4 = 13.9 mA
Adjust the HI 8936 SLOPE trim-
mer to read "13.9 mA" on the
ammeter, or the reading of the
HI 8733 (e.g. 123.4 mS) on
the HI 8936L display. .
• Adjust the HI 8931 SLOPE trimmer until the controller reading is
the same as the one displayed by the HI 8733 (e.g. 123.4 mS).
Ensure that the HI 7635 conductivity probe is dry.
When the power is on, the ammeter should read "4.0 mA".
The HI 8936 transmitter with LCD should display "0".
• If not, adjust the transmitter OFF-
SET trimmer to read "4 mA" or
"0" on the HI 8936 LCD.
The HI 8931 controller should dis-
play "0" value.
If not, adjust the HI 8931 OFF-
SET trimmer to display a zero
reading.
• Switch the flow on and allow the
sample solution to flow through
the HI 7635 conductivity probe.
Collect a sample of this solution in
a beaker.
Measure the conductivity of the
solution with a reference conduc-
tivity meter with ATC (HI 8733).
The value obtained will be used
for the transmitter and controller
calibration.