BE1-49 Operational Test
5-1
CAUTION
Before performing the following tests, refer to the relay operating precautions in
Section 4,
Installation
.
SECTION 5 • OPERATIONAL TEST
INTRODUCTION
Operational test procedures are provided in this section for use in verifying operation of the temperature relay
and for selecting desired upper and lower temperature limit trip points. Temperature calibrations performed
on the bench may be affected by the resistance of the relay-to-RTD wiring in the field installation. This effect
is minimized by using the 4-wire sensing connection shown in Figure 4-11. These variations will be on the
order of 1.5°C or less, provided the field wiring is held at 20 ohms or less per lead. For greater accuracy, it
is suggested that a resistance equivalent to that of the RTD current supply wiring be inserted in the test setup.
If a relay fails an operational test, refer to Section 6. Alternatively, the relay may be returned to the factory for
repair. When returning the relay to the factory, ship the entire relay cradle assembly, preferably in the case.
Some of the steps in the following procedures call for observations that are dependent on the output option
supplied. A table of observable results is provided with those steps.
POWER SUPPLY STATUS OUTPUT (OPTION 2-S)
Step 1. With the unit in a powered-up condition, verify that the power supply status output contact is
energized open (terminals 11 and 12).
Step 2. Remove input power and verify that the status output contact closes. Restore input power.
OPERATIONAL TEST OF UPPER TEMPERATURE LIMIT TRIP
Step 1. Connect the relay as shown in Figure 5-1.
Step 2. Set the resistor decade box for minimum resistance.
Step 3. Set LOWER TEMP LIMIT °C control to 60.
Step 4. Set UPPER TEMP LIMIT °C control to 190.
Step 5. With relay connecting plug(s) in place, apply appropriate operating power to relay.
Step 6. Observe that the test setup indicators are ON or OFF as listed in the chart which follows.
Test Setup Indicators, Step 6
OUTPUT
OPTION
C
D
F
H
J
L
M
N
P
R
S
T
DS1
OFF OFF OFF
ON
OFF OFF
ON
OFF
ON
ON
OFF
ON
DS2
OFF OFF OFF
ON
OFF
-
-
ON
OFF
ON
ON
OFF
OPTION 3
0
1
2
5
DS3
---
--- ON
ON
DS4
---
OFF
--- OFF
Summary of Contents for BE1-49
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