beautypg.com

3 polarizer test – Metrohm 785 DMP Titrino User Manual

Page 146

background image

4.2.

Diagnosis

785 DMP Titrino

143

• 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
correspond 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 14.3k

?

• 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

• Press .

diagnose press key 0...9

• Remove cable and resistor switch-box.