Myron-l TH1 User Manual download pdf (Page 15)

To bypass a calibration step, simply press to accept the present

value as is.

b. Leaving Calibration

Calibration is complete when the “CAL” icon goes out. Pressing any

measurement key cancels changes not yet accepted and exits calibration

mode.

Leaving pH after the 2nd buffer results in the same gain being entered in

place of the 3rd buffer.

2. Calibration Limits

There are calibration limits. A nominal “FAC” value is an ideal value

stored by the factory. Attempts to calibrate too far, up or down, from there

will cause the displayed value to be replaced with “FAC”. If you accept it

(press the “Cal” key) you will have the original default factory calibration

for this measurement. The need to calibrate so far out that “FAC” appears

indicates a procedural problem, incorrect standard solution, a very dirty

cell cup or an aging pH sensor (ref. Troubleshooting Chart, pg. 22).

C. Calibration Procedures

1. Conductivity or TDS Calibration (TPH1 & TP1)

a. Rinse conductivity cell three times with proper standard (KCl,

NaCl, or 442) (ref. Cond/TDS Standard Solutions, pg. 24).

b. Rell conductivity cell with same standard. KCl-7000 used in

Figure 2, pg. 11.

c. Press or , then press , “CAL” icon will appear

on the display (see Figure 2).

d. Press or to step

the displayed value toward the

standard’s value (7032 >7000)

or hold a key down to scroll

rapidly through the reading.

e. Press once to conrm new value and end the calibration

sequence for this particular solution type. If another solution type is

also to be measured, change solution type now and repeat this

procedure.

Figure 2

°C

KCl

COND

CAL

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 43 44

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Myron-l TH1 User Manual Page 15