Vaisala MMT162 - Manual (Page 50)

User's Guide ______________________________________________________________________
48 __________________________________________________________________ M210934EN-C
Changing the Filter
1. Remove the filter from the probe.
2. Install a new filter on the probe. When using the stainless steel
filter (for oil and fuel cell), take care to tighten the filter properly
(recommended force 130 Ncm).
New filters can be ordered from Vaisala, see section Spare Parts and
Accessories on page 61.
Changing the Sensor
If you need to change the sensor on your MMT162, send it to Vaisala
where the sensor will be changed for you.
Error States
MMT162 has the following states that indicate a problem with the probe:
- Analog 4 - 20 mA current output at 0 mA
- Analog voltage output at 0 V
- Serial line outputs asterisk characters (*** **)
The asterisk characters on the serial line may also appear during the start-
up procedure.
You can also check the error message via the serial interface by using the
ERRS command. In case of constant error, please contact Vaisala; see
section Technical Support on page 50.