Hanna Instruments hi 98701 User Manual

THERMOCOUPLE CALIBRATION

1. With a mV simulator, input 0.000 mV at channel

1 of the meter.

2. Ensure the meter is not displaying the cold junction temperature

and press ALT, CFM and PAPER simultaneously while the meter is
not printing nor logging to enter calibration mode.

3. User is prompted to enter password if it has been set to a value

different from 0000, otherwise skip to step 6.

4. Enter the password using the arrow keys.
5. Press ALT and CFM to confirm or CH/TIME or TEMP/TIME to exit.
6. If password is correct or not set, the meter

will display "0°C" on the upper LCD and
"C 0" on its lower part; if wrong, it will
return to measurement mode without any
message.

7. When the "S" symbol blinks in the lower

LCD, the reading is stable and calibration
can be confirmed pressing ALT and CFM.

8. The LCD will display CALC for a few seconds.
9. The second calibration point "1000°C"

will be displayed on the upper LCD and
"C 0" on its lower part.

10. Input 41.269 mV at channel

1 of the meter.

11. When the "S" symbol blinks in the lower

LCD, the reading is stable and calibration
can be confirmed pressing ALT and CFM.

12. "CALC" is displayed on the upper LCD for a few seconds and then

the meter returns to normal operational mode.

Note: Even though only channel #1 is used during calibration, all

the channels and all the thermocouple types are calibrated.

Note: If a wrong input is connected or channel #1 is left open, when

confirming the calibration point the LCD will display "Err".

Note: To escape before ending the calibration procedure press CH/TIME

or TEMP/TIME.

Note: When connecting a mV simulator to the meter use two wires of the

same material of the simulator terminals to avoid undesired ther-
mocouple junctions that could alter the mV input of the meter.

Note: Avoid touching the meter connectors if possible and wait about 15

minutes for temperature stabilization after connections before pro-
ceeding with the calibration steps.