MTS Systems FlexTest SE Service Information

Before You Begin
Model 493.02 Controller Service
Calibration
97
Before You Begin
Before you start sensor calibration, be sure the following are true:
• The sensors are properly connected to the controller
(see “Stand-Alone Cabling Overview” on page 41).
• A configuration file has been created that includes the hardware
resources associated with the sensors you want to calibrate.
• You have completed an initial, nominal tuning of the sensor
channel you are calibrating. This is especially important if you
have not calibrated the sensor before.
• The hydraulics are warmed up (see System warm-up below).
• Conditioner Gain is set to 1 (3-stage servovalves only).
• You know your signal polarity (see Signal polarity below).
System warm-up Be sure that both the hydraulic fluid and the servovalve are at
operating temperature before calibration. Remove any specimen and
run the system in displacement control for at least 30 minutes using a
80% full-scale length command at about 0.1 Hz.
Refer to “How to Warm Up Station Hydraulics” in the Chapter 2,
Common Tasks of the FlexTest SE User’s manual for a detailed
procedure.
Signal polarity Some test systems are configured to extend the actuator in response to
a positive command, while other test systems are configured to retract
the actuator in response to a positive command. Conditioner polarity
determines feedback polarity.
You must know how your test system is configured so you can
determine the appropriate polarity for the values used in this chapter.
The valve polarity is established first (see “Setting the Servovalve
Polarity” on page 73).

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English