Extech Instruments 96VFL

2 VFL Series User Manual v2.3 12/20
Table of Contents
1. Introduction ..................................................................................................... 4
2. Safety ............................................................................................................... 5
3. Panel Cut-out, Dimensions, and Mounting ....................................................... 6
3.1 48VFL Mounting............................................................................................................... 6
3.2 96VFL Mounting............................................................................................................... 6
4. Wiring .............................................................................................................. 7
4.1 WARNING! Wiring Safety Considerations ............................................................................ 7
4.2 AC Power Wiring .............................................................................................................. 7
4.3 Thermocouple Input ......................................................................................................... 7
4.4 Analog Input (4-20mA) optional ......................................................................................... 7
4.5 RTD Input Wiring.............................................................................................................. 8
4.6 Control Relay Wiring ......................................................................................................... 8
4.7 Pulsed DC Trigger Output Wiring ........................................................................................ 9
4.8 Analog Output Wiring ....................................................................................................... 9
4.9 Alarm Relay Output .......................................................................................................... 9
4.10 Optional 24Vdc ‘Loop Power’ Supply (96VFL) ..................................................................... 10
5. Product Description ........................................................................................ 10
5.1 96VFL Front Panel .......................................................................................................... 10
5.2 48VFL Front Panel .......................................................................................................... 11
5.3 Keypad Descriptions ....................................................................................................... 11
5.4 Display Descriptions ....................................................................................................... 12
6. Process Control .............................................................................................. 14
6.1 Connect the Inputs ......................................................................................................... 14
6.2 Connect the Outputs ...................................................................................................... 14
6.3 Program the Controller ................................................................................................... 14
6.4 Primary Relay Output Control .......................................................................................... 14
6.5 Secondary (optional) Relay Output Control ....................................................................... 14
6.6 Pulsed DC Trigger Option ................................................................................................ 15
6.7 Analog Output Option .................................................................................................... 15
6.8 ON-OFF Control ............................................................................................................. 15
6.9 PID Control .................................................................................................................... 15
6.10 PID ‘Time Proportioning’ Control ..................................................................................... 16
6.11 Proportional Control Considerations ................................................................................ 17
6.12 Dead Band Considerations .............................................................................................. 19
7. Programming Menu Basics ............................................................................ 20
8. Programming Menu 1 (User level) ................................................................. 22
9. Programming Menu 2 (Soft Start level) .......................................................... 23
9.1 Soft-Start Utility Overview ............................................................................................... 23
9.2 Ramp-to-Setpoint (Ramp) Overview ................................................................................. 23
10. Programming Menu 3 (PID level) ................................................................... 24