Metrohm 751 GPD Titrino - Manual (Page 201)

4.2. Diagnosis
751 GPD Titrino
198
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 k Ω , 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
correspond to 0°C.)
• Press <Clear>.
analog input test 1...5
• Remove cables and resistor switch-box.
6.3 Polarizer test
• Press <5>.
polarizer test
• Press <Enter>.
dummy resistor 14.3kΩ Ω ?
• Connect resistor switch-box (or suitable resistor 14.3 k Ω 0.1%) using 3.496.5070 cable to
‘Pol’ socket. Switch-box to 14.3 k Ω .
• Press <Enter>.
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 <Clear>.
analog input test 1...5
• Press <Clear>.
diagnose press key 0...9
• Remove cable and resistor switch-box.