Press
°C
°F
SCALE
CLOCK
SPEED
SET
LIGHT
NO
POWER
CONFIG
YES
MODE
key to get into the Configuration mode. In this mode, you can set
High & Low alarm points as well as the Time Clock as shown in the flow chart
on the previous page.
You can exit the configuration menu at any time by pressing the
°C
°F
SCALE
CLOCK
SPEED
SET
LIGHT
NO
POWER
CONFIG
YES
MODE
key. The
high & low alarm set points are stored in the non-volatile memory. Removing
power (ac adapter or batteries) will not affect the alarm settings. The real time clock
has its own rechargeable battery back up. The clock continues to operate when the
main power is removed for about 14 days. There is no need to change the real time
clock battery since it gets charged every time the main power is present.
The recorder has two built-in Relays and provides an additional two voltage
outputs to drive external mechanical relays. There is a 10 position terminal block
in the back of the recorder. It provides the two relay contact closures & two
signal outputs to drive external mechanical relays as shown in Fig 2.14. In order
to do your wiring, remove the terminal block from the back of the recorder.
Connect your wiring, then plug the terminal block back in its place.
7
1
2
4
3
6
5
7
8
9
10
NC
–PS
+PS
FUSE 2A (T)
FUSE 2A (T)
Lo Alarm - CHAN 2
Lo Alarm - CHAN 1
NC
External
Power Supply
5 to 24 VDC
+
+
+
–
–
–
Relay #2 contact closure - Hi Alarm, CHAN 2 (Humidity)
Normally open
Relay #1 contact closure - Hi Alarm, CHAN 1 (Temperature)
Normally open
Use Time-Lag Fuse Type IEC 127-2
FIG 2-14 Terminal Block Wiring Diagram
External
Relay #1
External
Relay #2
Load
Load
Figure 2-14. Relay Terminal Block Wiring Diagram
When the recorder is in alarm condition, the high or low alarm icon
and the channel no. flashes on the display. The unit beeps and the
corresponding relay output turns on (Built-in Relay energizes-contact
closure- and/or relay voltage output goes high). You can disable
the high or low alarms by going thru the configuration menu and
pressing the SET key to disable.
If you are switching inductive loads across Relay contacts, it is
recommended to connect a Varistor across the relay contacts to
protect the contacts from the rush current during the switching period.
Setting Up the Recorder
2
2-11
NOTE
Summary of Contents for CTXL-TRH-W-W9
Page 64: ...6 2 List of Accessories and Charts Papers 6 Notes...
Page 79: ...NOTES 8 13...
Page 80: ...NOTES 8 14...
