Verifying The Analog Output - GE Hydran 201 i Instruction Manual

Chapter 8 • Hydran 201Ci-1 Installation
3. Inside the H201Ci-1, verify the Supervisory Link Supply indicator (green, DS12;
item 17 in Figure 3-7 on page 3-12) is lit.
4. Inside the H201Ci-1, look at the Heater indicator (yellow, DS8; item 13 in Figure 3-7
on page 3-12):
• The LED must initially be lit if the ambient temperature is below approximately 25 °C
(77 °F).
• After a while, the LED must flash as the enclosure temperature reaches the above set
point.
• The LED must remain off if the ambient temperature exceeds the set point.
5. Since there are no alarm conditions present in the H201Ti, verify the following points
on the H201Ci-1:
• The Gas High alarm indicator of the door-mounted push-button 1 (item 2 in Figure 3-5
on page 3-9) is off.
• The Gas High-High alarm indicator of the door-mounted push-button 2 (item 2 in
Figure 3-5 on page 3-9) is off.
• The Alarm 1 (Gas High) indicator (yellow, DS10; item 15 in Figure 3-7 on page 3-12) is
off.
• The Alarm 2 (Gas High-High) indicator (yellow, DS9; item 14 in Figure 3-7 on
page 3-12) is off.
• The System OK indicator (yellow, DS11; item 16 in Figure 3-7 on page 3-12) is lit.
8.2.3

Verifying the Analog Output

The Hydran 201Ci-1 is equipped with an isolated, analog 4–20 mA output. Table 4-7 on
page 4-25 lists the electrical currents that should be generated and the values that should be
displayed for each operation mode.
Proceed as follows:
1. Connect a dc digital ammeter with a 1 % accuracy and a 0.01 mA resolution to the
main terminal block on the H201Ci-1 (item 6 in Figure 3-6 on page 3-11).
2. Connect the positive lead on the pin 17 of the main terminal block.
3. Connect the negative lead on the pin 18 of the main terminal block.
8-4 Rev. 6, March 2011 Part 17997