I
NSTALLATION
748221-L Rosemount Analytical December 2000
15
Model 7D Thermal Conductivity Analyzer
When input signal moves upscale through this point, the
coil of ALARM 1 relay (K1) is energized, providing
continuity between the common and normally-closed
contacts of the relay.
ALARM 1 Setpoint
When input signal moves downscale through this point, the
coil of ALARM 1 relay (K1) is de-energized, providing
continuity between the common and normally-open
contacts of the relay.
ALARM 2 Setpoint
When input signal moves upscale through this point, the
coil of ALARM 2 relay (K2) is de-energized, providing
continuity between the common and normally-open
contacts of the relay.
When input signal moves upscale through this point, the
coil of ALARM 2 relay (K2) is energized, providing
continuity between the common and normally-closed
contacts of the relay.
A. Typical ALARM 1 Setting (LOW)
DEADBAND SET FOR
20% OF FULLSCALE
DEADBAND SET FOR
10% OF FULLSCALE
B. Typical ALARM 2 Setting (HIGH)
INPUT SIGNAL
Percent of Fullscale
INPUT SIGNAL
Percent of Fullscale
40
30
20
55
50
45
2.3.5 L
INEARIZED
V
OLTAGE
, T
WO
R
ANGES
(O
PTIONAL
)
1. Verify that the Voltage Output Linearizer Board (PN 633756) is properly inserted in
both J102 and J103.
2. Verify that the range switch on the door is properly connected: Position (Range) 1
to TB2-5, Position 2 to TB2-3, Wiper to TB2-2.
3. On the Master Board (Figure 2-6):
a. Verify that TB2-1 is jumpered to TB2-4, and TB2-4 is jumped to TB2-6.
b. Select desired range on S1.
c. Connect recorder cable to the TB4 terminals labeled VOLT OUT: TB4-1 (+) and
TB4-2 (-).
Note
Take the usual precautions to avoid AC pickup. DO NOT GROUND EITHER
LEAD.
4. Connect the cable to the recorder input terminals; ensure that polarity is correct.
F
IGURE
2-8. T
YPICAL
A
LARM
S
ETTINGS
