Michell Instruments Easidew DryCheck, User Manual, Page: 12 / 43

Easidew DryCheck User’s Manual
4 97108 Issue 13, July 2017
INSTALLATION
Item Description
1
°Fdp
When illuminated, this LED indicates that the displayed dew-point reading is in degrees
Fahrenheit.
NOTE: If neither the °Fdp or °Cdp LED is lit, ppm
V
is selected.
2
°Cdp
When illuminated, this LED indicates that the displayed dew-point reading is in degrees
Celsius.
NOTE: if neither the °Cdp nor °Fdp LED is lit, ppm
V
is selected.
3
Main dew-point temperature display
Flashes to alternately indicate
ErrL
(error low) and temperature reading for low
temperatures under-range (lower than -100°Cdp (-148°Fdp) or -129.9°Cdp (199.9°Fdp)
for an open loop condition).
Flashes to alternately indicate
ErrH
(error high) and temperature reading for high
temperature over-range.
4
ALr1 Output
Only available directly from the back of the Monitor panel.
5
ALr2
When illuminated this LED indicates that the dew-point temperature programmed for
Alarm 2 has exceeded the programmed threshold. Under these conditions the alarm
relay changeover contacts associated with this alarm will change state and will remain in
this state until the temperature moves back to within the programmed operational limit.
Alarm 2 is usually allocated to the High Alarm setting.
These changeover relay contacts are rated at 240 V, 3 A and are connected as shown
in Section 2.8.
Section 3.4.3 details the setting up of
ALr2
trip points.
6
P
SET
The four function keys are used for setting up the
monitor.
Table 2 describes the operation of the keys.
Table 1 Monitor Front Panel Controls and Indicators