Metrohm 799 GPT Titrino - Manual (Page 202)

4.2. Diagnosis
799 GPT Titrino 198
• Press .
analog input test 1...5
6.2 To check Pt 100 / 1000 connection
• Connect a Pt 100 or Pt 1000 sensor, a resistor switch-box or a single resistor of 100
Ω or 1 kΩ, respectively, to sockets ‘Pt 100/1000’ by means of short cables.
• Press <4>.
Pt 100* XX °C
(* or Pt 1000)
Tolerance: ± 0.5 °C (Note also tolerance of resistor switch-box).
The sensor allows automatic displaying of the room temperature. (The resistor values corre-
spond to 0°C.)
• Press .
analog input test 1...5
• Remove cables and resistor switch-box.
6.3 Polarizer test
• Press <5>.
polarizer test
• Press .
dummy resistor 14.3kΩ ?
• Connect resistor switch-box (or suitable resistor 14.3 kΩ 0.1%) using 3.496.5070
cable to ‘Pol’ socket. Switch-box to 14.3 kΩ.
• Press .
Test sequence:
1. An asterisk flashes during the test.
2. In case of an error an error message appears. (If for example the switch-box is not
connected, error 100 appears).
3. If no error is found, after about 15 s display shows
polarizer test o.k.
• Press .
analog input test 1...5