6.Note the time, in minutes, between the peaks of the oscillations. This is the Ultimate Period, PU.

7.Note the value of the proportional constant. This is the Ultimate Gain, GU.

8.Compute the PID constants using the table below. Select the type of control from the rows of the table and use the equations in the columns to compute the values for each constant.

9.Set each constant according to these calculations.

Control

Proportional

Integral

Derivative

Method

 

 

 

 

 

 

 

P

0.5*GU

P + I

0.45*GU

0.54*GU/PU

P + I + D

0.6*GU

1.2 * GU/PU

0.075*GU*PU

You may need to further tune the PID loops in the following ways to account for changes in the room load:

Loop Behavior

PID Tuning Correction

 

 

Slow response to temperature/humidity

Decrease the proportional multiplier or increase the

changes

derivative multiplier.

 

 

Over-cooling/Under-cooling after changes in

Increase the derivative or the proportional multipliers.

the room load or changes in setpoint

 

 

 

Environmental temperature/humidity never

Increase the integral setting.

reaches the setpoint

 

 

 

Over-cooling/Under-cooling on constant

Decrease the integral multiplier.

room load

 

 

 

Humidification sensitivity

Path: Main > Setup > System # > System Config > Humid. Sensitivity

Humid. Sensitivity: 2 %RH

na0434a

Humid. Sensitivity. The humidifier sensitivity band is the percentage of relative humidity below the humidify setpoint at which the humidifier operates at full output.

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

39

Page 49
Image 49
American Power Conversion FM, DX manual Control Proportional Integral Derivative Method, Loop Behavior PID Tuning Correction

DX, FM specifications

The American Power Conversion (APC) DX,FM series represents a cutting-edge solution designed for critical power management and uninterruptible power supply (UPS) applications. Aimed at businesses and data centers that require robust power protection, this series balances high-performance capabilities with advanced technology features.

One of the key distinguishing features of the DX,FM series is its modular design. This allows users to scale their UPS system according to their needs, making it suitable for a variety of environments. Whether you're managing a small server room or a large data center, the modular architecture ensures that you can add or remove capacity with ease. This flexibility not only optimizes initial investments but also supports future growth seamlessly.

The series employs advanced battery technology, which extends battery life and enhances overall performance. With intelligent battery management systems, the DX,FM ensures that battery health is monitored in real-time, preventing premature failures and unnecessary replacements. This leads to reduced maintenance costs and maximizes uptime.

Additionally, the DX,FM series features innovative cooling solutions that enhance performance in high-density situations. Efficient thermal management reduces the risk of overheating, keeping valuable equipment operating optimally. This is particularly crucial in data centers where heat generated by servers can create potential disruptions.

Another significant characteristic of the DX,FM series is its sophisticated monitoring and management capabilities. Integrated with state-of-the-art software, users can gain remote access to their UPS units, enabling real-time tracking of performance metrics. This remote monitoring capability allows administrators to proactively manage power usage and ensure that systems are operating within safe parameters.

Furthermore, the DX,FM series is designed with a high level of redundancy. This built-in reliability feature ensures that if one unit fails, others can seamlessly take over, maintaining power supply continuity. This is critical for mission-critical environments where power outages could result in substantial financial losses or data loss.

In summary, the American Power Conversion DX,FM series incorporates modularity, advanced battery technology, effective cooling solutions, and sophisticated monitoring features to deliver an ideal power management solution for various organizations. Its design prioritizes flexibility, reliability, and efficiency, making it an essential investment for any business looking to safeguard its operations against power disruptions.