Myron L 6Pfc and 4P - Manual (Page 18)

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2. Disabling Temperature Compensation
a. Select User mode (ref. Procedure to Select a Solution, pg. 13).
b. With “User” selected, press . If the display does not
show .00%/°C, hold long enough to bring the tempco to
.00%/°C (see Figure 3).
Figure 3
°C % /
User
COND
c. Press twice
(3 times if in TDS mode).
Temperature compensation
is now disabled (=0) for
measurements in User mode.
3. User Programmable Conductivity to TDS Ratio
This feature allows you to select a custom conductivity to TDS conversion
ratio within the range of 0.20-7.99 for User mode measurements.
To determine the conversion ratio for a custom solution of known
TDS ppm value, measure the solution conductivity at 25ºC with the
Ultrameter II and divide the ppm value by the µS value. For example,
a solution of known 75 ppm TDS and measured 100 µS conductivity at
25ºC would have a conversion ratio of 75/100 or 0.75. Enter the new
conversion ratio as follows:
a.
While in User mode, press .
b. Press twice (to skip
Figure 4
RATIO
User
TDS
over tempco adjustment) and
“RATIO” will appear (see
Figure 4).
c. Adjust with or
key until new conversion
ratio is displayed.
d. Press twice (to skip over calibration adjustment) to
accept new conversion ratio. You are now ready to measure
samples with the new conductivity/TDS ratio.
In these first six sections, you have learned
all you need to make accurate measurements.
The following sections contain calibration,
advanced operations and technical information.