Vaisala MMT162 - Manual (Page 23)

Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 21
CHAPTER 4
OPERATION
This chapter contains information that is needed to operate this product.
Getting Started
MMT162 is ready to be used once it has been connected to a power
source.
Analog Output Operation Modes
The MMT162 has two analog output channels. These channels can
function in two different modes, which can be set individually for both
channels:
1. Normal operation mode
2. Limit alarm mode
When the transmitter is ordered from Vaisala, the modes are configured
as specified in the order form. You can change the operation settings
after delivery by using serial commands and the USB cable accessory.
Normal Operation Mode and Malfunction
Alarm
In the normal operation mode, a channel outputs voltage or current that
corresponds to the reading of the selected parameter.
If the transmitter is malfunctioning, the channel output is set to a pre-
defined level. This level can be changed using the AERR command; see
page 35.
NOTE The malfunction alarm overrides the limit alarm mode. If the transmitter
is malfunctioning, the analog outputs are set to the levels specified with
the AERR command, unless the malfunction prevents the outputs from
being controlled.