User Guide

• For the second calibration point it is possible to choose

between 350 mV and 1900 mV. Pressing the  or  key

the value on the secondary LCD will switch between the two

possibilities.

• Once selected the second calibration point, set the HI

931001 (350 mV) or HI 8427 (350 or 1900 mV) simula-

tor to the same value and the calibration proceeds as for

the first point.

Note In ORP calibration there is no time-out.

TEMPERATURE CALIBRATION

Check that the code 90 has been entered in Setup mode.

• Prepare a beaker containing crushed ice and water at 0°C

(32°F) and another one with hot water at 25°C (77°F) or

50°C (122°F).

• Use a Checktemp or another calibrated

thermometer with a resolution of 0.1° as a

reference thermometer.

• Immerse the temperature probe in the bea-

ker with ice and water as near to the

Checktemp as possible.

Note The instrument can support Pt100 or Pt1000 temperature

sensor and calibration can be performed with anyone of these

two probes.

• After entering the calibration mode, move through the menu

(using the  or  key) to choose the temperature and the

correct kind of used probe; the primary

LCD shows “°C” and the secondary LCD

gives indication about the kind of probe

(“100” indicates a Pt100 probe, while

“1000” stands for a Pt1000 probe).

Press the CFM key to confirm selection.

• The calibration has to be performed over two points: the

first point has to be 0°C and the second one can be cho-

sen between 25°C and 50°C.

Once confirmed the type of calibration,

the primary LCD will display the current

temperature measure and the second-