Temperature compensation
(pH mode only)
is set for 20
o
C by default.
This can be changed in the configuration program from 0 to 100
o
C.
A PT-100 temperature electrode connected to the terminals enables the
option for automatic compensation.
The PMH-2 features an alarm relay with potential free contacts. Low
and high alarm points are set in the configuration menu. ALARM/Relay2
can also be configured to perform as a second setpoint relay in either up
or down mode.
The flow switch input is configured to operate as N/O or N/C.
(normally
open or normally closed)
If no flow is detected relay 1 and relay 2 are
locked out and the relay’s LED flash. The flow LED indicates this condition.
The inherent accuracy and range configuration of the 4-20mA constant
current output together with full electrical isolation make it possible to
interface into a microprocessor, logic controller or data logger to further
expand the combination of installations with the PMH-2.
PAGE 8
PMH-2 Instruction manual
